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UART ¤È¤Ï²¿¤«, ¤½¤·¤Æ¤É¤Î¤è¤¦¤Ëưºî¤¹¤ë¤«

Copyright © 1996 Frank Durda IV , All Rights Reserved. 13 January 1996.

Ìõ: º´Çì δ»Ê , ´äºê Ëþ . 11 November 1996.

( ¤³¤³¤«¤é¤Ï º´Çì δ»Ê ¤¬ËÝÌõ¤òôÅö)

ÈÆÍÑÈ󯱴üÁ÷¼õ¿®¥³¥ó¥È¥í¡¼¥é (UART) ¤Ï¥³¥ó¥Ô¥å¡¼¥¿¤Î¥·¥ê¥¢¥ëÄÌ¿® ¥µ¥Ö¥·¥¹¥Æ¥à¤Î¸°¤È¤Ê¤ëÉôÉʤǤ¹. UART ¤Ï²¿¥Ð¥¤¥È¤«¤Î¥Ç¡¼¥¿¤ò¼õ¤±¤È¤ê, ¤³¤ì¤ò 1 ¥Ó¥Ã¥È¤º¤Ä½çÈÖ¤ËÁ÷¿®¤·¤Þ¤¹. ¼õ¿®Â¦¤Ç¤Ï, ¤â¤¦°ì¤Ä¤Î UART ¤¬ ¤³¤Î¥Ó¥Ã¥ÈÎó¤ò´°Á´¤Ê¥Ð¥¤¥ÈÎó¤ËÁȤßΩ¤ÆÄ¾¤·¤Þ¤¹.

¥·¥ê¥¢¥ëžÁ÷¤Ï, ¥â¥Ç¥à¤ä¥³¥ó¥Ô¥å¡¼¥¿´Ö¤ÎÈó¥Í¥Ã¥È¥ï¡¼¥¯·¿¤ÎÄÌ¿®, ¥¿¡¼¥ß¥Ê¥ë¤½¤Î¾¤Î¥Ç¥Ð¥¤¥¹¤Ç¹­¤¯»È¤ï¤ì¤Æ¤¤¤Þ¤¹.

¥·¥ê¥¢¥ëžÁ÷¤Ë¤Ï¼ç¤ËƱ´ü¤ÈÈ󯱴ü¤È¤¤¤¦ Æó¤Ä¤Î·Á¼°¤¬¤¢¤ê¤Þ¤¹: ÄÌ¿®¥µ¥Ö¥·¥¹¥Æ¥à¤Î̾Á°¤Ï, ¤½¤Î¥Ï¡¼¥É¥¦¥§¥¢¤Ç¥µ¥Ý¡¼¥È¤µ¤ì¤Æ¤¤¤ë ÄÌ¿®¥â¡¼¥É¤Ë¤è¤Ã¤ÆÊѲ½¤·¤Þ¤¹. Ä̾ï, È󯱴üÄÌ¿®¤ò¥µ¥Ý¡¼¥È¤·¤Æ¤¤¤ë¤â¤Î¤Ïʸ»ú A ¤ò´Þ¤ß, Ʊ´üÄÌ¿®¤ò¥µ¥Ý¡¼¥È¤·¤Æ¤¤¤ë¤â¤Î¤Ïʸ»ú S ¤ò´Þ¤ß¤Þ¤¹. °Ê²¼¤ÇξÊý¤Î·Á¼°¤Ë¤Ä¤¤¤Æ¾Ü¤·¤¯ÀâÌÀ¤·¤Þ¤¹.

Ä̾ï»È¤ï¤ì¤Æ¤¤¤ëά¹æ¤Ï°Ê²¼¤ÎÄ̤ê¤Ç¤¹:

UART ÈÆÍÑÈ󯱴üÁ÷¼õ¿®ÁõÃÖ (Universal Asynchronous Receiver/Transmitter)

USART ÈÆÍÑÆ±´ü-È󯱴üÁ÷¼õ¿®ÁõÃÖ (Universal Synchronous-Asynchronous Receiver/Transmitter)

Ʊ´ü¥·¥ê¥¢¥ëžÁ÷

Ʊ´ü¥·¥ê¥¢¥ëžÁ÷¤Ç¤Ï, Á÷¿®Â¦¤È¼õ¿®Â¦¤¬¥¯¥í¥Ã¥¯¤ò¶¦Í­¤·¤Æ¤¤¤ë ɬÍפ¬¤¢¤ê¤Þ¤¹. ¤µ¤â¤Ê¤±¤ì¤Ð, Á÷¿®Â¦¤¬¥¹¥È¥í¡¼¥Ö¤Þ¤¿¤Ï ¤½¤Î¾¤Î¥¿¥¤¥ß¥ó¥°¿®¹æ¤ò¶¡µë¤·¤Æ, ¼õ¿®Â¦¤Ë¥Ç¡¼¥¿¤Î¼¡¤Î¥Ó¥Ã¥È¤ò ¤¤¤Ä``ÆÉ¤ß¹þ'' ¤á¤Ð¤è¤¤¤Î¤«¤òÃΤ餻¤ëɬÍפ¬¤¢¤ê¤Þ¤¹.

¤Û¤È¤ó¤É¤ÎƱ´ü¥·¥ê¥¢¥ëÄÌ¿®¤Ç¤Ï, ¾ï¤Ë²¿¤é¤«¤Î¥Ç¡¼¥¿¤¬Å¾Á÷¤µ¤ì³¤±¤Þ¤¹. ¤½¤Î¤¿¤á, žÁ÷¤Î¥¿¥¤¥ß¥ó¥°¤Þ¤Ç¤ËÁ÷¿®¥Ç¡¼¥¿¤¬ÍѰդǤ­¤Æ¤¤¤Ê¤±¤ì¤Ð, Ä̾ï¤Î¥Ç¡¼¥¿¤Î¤«¤ï¤ê¤Ë¡ÖËä¤áÁð¡× (fill character) ¤¬Á÷¤é¤ì¤Þ¤¹. Ʊ´üÄÌ¿®¤Ç¤Ï, Á÷¿®Â¦¤È¼õ¿®Â¦¤È¤Î´Ö¤Ç¥Ç¡¼¥¿¥Ó¥Ã¥È¤Î¤ß¤¬Å¾Á÷¤µ¤ì¤ë¤¿¤á, Ʊ¤¸¥Ó¥Ã¥È®ÅÙ¤ÎÈ󯱴ü¥·¥ê¥¢¥ëÄÌ¿®¤ËÈæ¤Ù¤Æ¸úΨŪ¤Ç¤¹. ¤·¤«¤·, Á÷¿®Â¦¤È¼õ¿®Â¦¤Ç¥¯¥í¥Ã¥¯¿®¹æ¤ò¶¦Í­¤¹¤ë¤¿¤á¤Ë;ʬ¤ÊÅÅÀþ¤È ²óÏ©¤¬É¬ÍפȤʤë¾ì¹ç¤Ë¤Ï, ¤è¤ê¥³¥¹¥È¹â¤È¤Ê¤ë²ÄǽÀ­¤¬¤¢¤ê¤Þ¤¹.

¥×¥ê¥ó¥¿¤ä¥Ï¡¼¥É¥Ç¥£¥¹¥¯¤Ç¤âƱ´üžÁ÷¤Î °ì¼ï¤¬»ÈÍѤµ¤ì¤Æ¤¤¤Þ¤¹. ¤³¤Î¤È¤­¥Ç¡¼¥¿¤¬ 1 ÁȤߤÎÅÅÀþ¤ÇÁ÷¤é¤ì¤ë°ìÊý, ¥¯¥í¥Ã¥¯¿®¹æ¤Þ¤¿¤Ï ¥¹¥È¥í¡¼¥Ö¿®¹æ¤¬Ê̤ÎÅÅÀþ¤ÇÁ÷¤é¤ì¤Þ¤¹. ¥×¥ê¥ó¥¿¤ä¥Ï¡¼¥É¥Ç¥£¥¹¥¯¤ÏÄ̾ï, ¥·¥ê¥¢¥ë¥Ç¥Ð¥¤¥¹¤Ç¤Ï¤¢¤ê¤Þ¤»¤ó. ¤Û¤È¤ó¤É¤Î¥Ï¡¼¥É¥Ç¥£¥¹¥¯¤Î¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹µ¬³Ê¤Ç¤Ï, ¥Ç¡¼¥¿¤òÁ÷¤ë¤¿¤á¤Î Àþ¤È¤ÏÊ̤˥¯¥í¥Ã¥¯¤Þ¤¿¤Ï¥¹¥È¥í¡¼¥Ö¿®¹æ¤ò Á÷¤ë¤¿¤á¤ÎÀþ¤ò»ý¤Ã¤Æ¤¤¤Æ, ¥¹¥È¥í¡¼¥Ö 1 ²óËè¤Ë°ì¤Ä¤Î¥Ç¡¼¥¿Á´ÂΤòÁ÷¤ê¤Þ¤¹. PC »º¶È³¦¤Ç¤Ï, ¤³¤ì¤é¤Ï¥Ñ¥é¥ì¥ë¥Ç¥Ð¥¤¥¹¤È¤·¤ÆÃΤé¤ì¤Æ¤¤¤Þ¤¹.

PC ¤Îɸ½àŪ¤Ê¥·¥ê¥¢¥ëÄÌ¿®¥Ï¡¼¥É¥¦¥§¥¢¤Ï, Ʊ´ü¥â¡¼¥É¤ò¥µ¥Ý¡¼¥È¤·¤Æ ¤¤¤Þ¤»¤ó. ¤³¤³¤ÇƱ´ü¥â¡¼¥É¤Ë¤Ä¤¤¤Æ½Ò¤Ù¤¿¤Î¤Ï, È󯱴ü¥â¡¼¥É¤È¤Î Èæ³Ó¤Î¤¿¤á¤Ë²á¤®¤Þ¤»¤ó.

È󯱴ü¥·¥ê¥¢¥ëžÁ÷

È󯱴üžÁ÷¤Ï, Á÷¿®Â¦¤¬¥¯¥í¥Ã¥¯¿®¹æ¤ò¼õ¿®Â¦¤ËÁ÷¤é¤Ê¤¯¤Æ¤â ¥Ç¡¼¥¿¤òžÁ÷¤¹¤ë¤³¤È¤¬¤Ç¤­¤Þ¤¹. ¤½¤Î¤«¤ï¤ê, Á÷¿®Â¦¤È¼õ¿®Â¦¤Ï ¤¢¤é¤«¤¸¤á¥¿¥¤¥ß¥ó¥°¥Ñ¥é¥á¡¼¥¿¤äƱ´ü¤Î¤¿¤á¤ËÄɲ䵤ì¤ë ÆÃÊ̤ʥӥåȤˤĤ¤¤Æ ¼è¤ê·è¤á¤ò¤ª¤³¤Ê¤Ã¤Æ¤ª¤«¤Ê¤±¤ì¤Ð¤Ê¤ê¤Þ¤»¤ó.

È󯱴üžÁ÷¤ò¤ª¤³¤Ê¤¦¤¿¤á¤Ë UART ¤Ë¥Ç¡¼¥¿¤¬Í¿¤¨¤é¤ì¤ë¤È, ¡Ö¥¹¥¿¡¼¥È¥Ó¥Ã¥È¡× ¤È¸Æ¤Ð¤ì¤ë¥Ó¥Ã¥È¤¬Å¾Á÷¥Ç¡¼¥¿¤ÎÀèÆ¬¤ËÄɲ䵤ì¤Þ¤¹. ¥¹¥¿¡¼¥È¥Ó¥Ã¥È¤Ï¥Ç¡¼¥¿¤ÎžÁ÷³«»Ï¤ò¼õ¿®Â¦¤Ë ÃΤ餻¤ë¤¿¤á¤Ë»È¤ï¤ì, ¤³¤ì¤Ë¤è¤ê¼õ¿®Â¦¤Î¥¯¥í¥Ã¥¯¤òÁ÷¿®Â¦¤Î¥¯¥í¥Ã¥¯¤Ë Ʊ´ü¤µ¤»¤Þ¤¹. ¤³¤ÎÆó¤Ä¤Î¥¯¥í¥Ã¥¯¤Ï, žÁ÷¥Ç¡¼¥¿¤Î»Ä¤ê¤Î¥Ó¥Ã¥È¤òžÁ÷¤¹¤ë´Ö¤Ë 10% °Ê¾å¤Õ¤é¤Ä¤«¤Ê¤¤¤è¤¦¤ËÀµ³Î¤Ê¤â¤Î¤Ç¤Ê¤±¤ì¤Ð¤Ê¤ê¤Þ¤»¤ó. (¤³¤Î¾ò·ï¤Ïµ¡³£¼°¥Æ¥ì¥¿¥¤¥×¤Î»þÂå¤ËÄê¤á¤é¤ì¤¿¤â¤Î¤Ê¤Î¤Ç, ¸½Âå¤ÎÅÅ»ÒÁõÃ֤Ǥ¢¤ì¤ÐÍÆ°×¤ËËþ­¤µ¤»¤ë¤³¤È¤¬¤Ç¤­¤Þ¤¹).

¥¹¥¿¡¼¥È¥Ó¥Ã¥È¤¬Á÷¤é¤ì¤¿¸å, ¥Ç¡¼¥¿¤Î³Æ¥Ó¥Ã¥È¤¬ºÇ²¼°Ì (LSB) ¤«¤é ½çÈÖ¤ËÁ÷¤é¤ì¤Þ¤¹. žÁ÷¤µ¤ì¤ë¥Ó¥Ã¥È¤ÎŤµ¤Ï¤¹¤Ù¤ÆÆ±¤¸¤Ë¤Ê¤Ã¤Æ¤¤¤Æ, ¼õ¿®Â¦¤Ï¤½¤ì¤¾¤ì¤Î¥Ó¥Ã¥È¤ÎÃæ±ûÉô¤Ç¤½¤ì¤¬ 1 ¤« 0 ¤«¤òȽÃǤ·¤Þ¤¹. Î㤨¤Ð, ²¾¤Ë 1 ¥Ó¥Ã¥È¤òÁ÷¤ë¤Î¤Ë 2 É䫤«¤ë¤È¤¹¤ë¤È, ¼õ¿®Â¦¤Ï ¥¹¥¿¡¼¥È¥Ó¥Ã¥È¤Î»Ï¤Þ¤ê¤òǧ¼±¤·¤¿ 1 Éøå¤Ë¿®¹æ¤¬ 1 ¤« 0 ¤«¤òÄ´¤Ù, ¤½¤Î¸å 2 É䴤Ȥ˼¡¤Î¥Ó¥Ã¥È¤ÎÃͤòÄ´¤Ù¤ë¤È¤¤¤¦Æ°ºî¤ò·«¤êÊÖ¤·¤Þ¤¹.

Á÷¿®Â¦¤Ï, ¤¤¤Ä¼õ¿®Â¦¤¬¥Ó¥Ã¥È¤ÎÃͤò ``¸«¤¿'' ¤Î¤«¤Ï¤ï¤«¤ê¤Þ¤»¤ó. Á÷¿®Â¦¤Ï¥¯¥í¥Ã¥¯¤Ë¤·¤¿¤¬¤Ã¤Æ ¼¡¡¹¤Ë¥Ó¥Ã¥È¤òžÁ÷¤¹¤ë¤À¤±¤Ç¤¹.

ÀßÄê¤Ë¤è¤Ã¤Æ¤Ï, 1 ¥ï¡¼¥É¤Î¥Ç¡¼¥¿Á´ÂΤ¬Á÷¤é¤ì¤¿¤¢¤È¤Ë Á÷¿®Â¦¤¬ÆâÉô¤ÇÀ¸À®¤·¤¿¥Ñ¥ê¥Æ¥£¥Ó¥Ã¥È¤ò Éղ乤ë¾ì¹ç¤¬¤¢¤ê¤Þ¤¹. ¥Ñ¥ê¥Æ¥£¥Ó¥Ã¥È¤Ï¼õ¿®Â¦¤Ç´Êñ¤Ê¥¨¥é¡¼¥Á¥§¥Ã¥¯¤ò ¤¹¤ë¤¿¤á¤Ë»È¤ï¤ì¤Þ¤¹. ¤½¤Î¸å¤Ë, ºÇÄã¤Ç¤â 1 ¥Ó¥Ã¥È¤Î¥¹¥È¥Ã¥×¥Ó¥Ã¥È¤¬Á÷¤é¤ì¤Þ¤¹.

1 ¥ï¡¼¥É¤Î¤¹¤Ù¤Æ¤Î¥Ó¥Ã¥È¤ò¼õ¿®¤¹¤ë¤È, ¼õ¿®Â¦¤¬¥Ñ¥ê¥Æ¥£¥Ó¥Ã¥È¤Î ¥Á¥§¥Ã¥¯¤ò¤ª¤³¤Ê¤¦¤è¤¦¤ËÀßÄꤹ¤ë¤³¤È¤¬¤Ç¤­¤Þ¤¹. (¥Ñ¥ê¥Æ¥£¥Ó¥Ã¥È¤ò »ÈÍѤ¹¤ë¤«¤É¤¦¤«, Á÷¿®Â¦¤È¼õ¿®Â¦¤Ç¤¢¤é¤«¤¸¤á¼è¤ê·è¤á¤Æ¤ª¤«¤Ê¤±¤ì¤Ð ¤Ê¤ê¤Þ¤»¤ó). ¤½¤ì¤«¤é¼õ¿®Â¦¤Ï¥¹¥È¥Ã¥×¥Ó¥Ã¥È¤ò¥Á¥§¥Ã¥¯¤·¤Þ¤¹. ¤â¤·¤â¥¹¥È¥Ã¥×¥Ó¥Ã¥È¤¬´üÂÔÄ̤ê¤Î°ÌÃ֤˸ºß¤·¤Ê¤±¤ì¤Ð, UART ¤Ï žÁ÷¥¨¥é¡¼¤¬È¯À¸¤·¤¿¤ÈȽÃǤ·¤Æ, ¥Û¥¹¥È¤¬¥Ç¡¼¥¿¤òÆÉ¤â¤¦¤È¤·¤¿»þ¤Ë ¥Õ¥ì¡¼¥ß¥ó¥°¥¨¥é¡¼¤¬µ¯¤­¤¿¤ÈÊó¹ð¤·¤Þ¤¹. Ä̾ï, ¥Õ¥ì¡¼¥ß¥ó¥°¥¨¥é¡¼¤Ï Á÷¿®Â¦¤È¼õ¿®Â¦¤Î¥¯¥í¥Ã¥¯¤¬°ìÃפ·¤Æ¤¤¤Ê¤«¤Ã¤¿¤ê, ¿®¹æ¤Ë³ä¤ê¹þ¤ß¤¬ Æþ¤Ã¤¿»þ¤Ëµ¯¤³¤ê¤Þ¤¹.

¥Ç¡¼¥¿¤¬Àµ¤·¤¯¼õ¿®¤µ¤ì¤¿¤«¤É¤¦¤«¤Ë¤«¤«¤ï¤é¤º, UART ¤Ï¥¹¥¿¡¼¥È, ¥Ñ¥ê¥Æ¥£, ¥¹¥È¥Ã¥×¥Ó¥Ã¥È¤ò¼«Æ°Åª¤Ë¼Î¤Æ¤Þ¤¹. Á÷¿®Â¦¤È¼õ¿®Â¦¤ÇÀßÄ꤬Àµ¤·¤¯°ìÃפ·¤Æ¤¤¤ì¤Ð, ¤³¤ì¤é¤Î¥Ó¥Ã¥È¤¬ ¸í¤Ã¤Æ¥Û¥¹¥È¤ËžÁ÷¤µ¤ì¤ë¤³¤È¤Ï¤¢¤ê¤Þ¤»¤ó.

1 ²ó¤ÎžÁ÷¤¬½ªÎ»¤¹¤ëÁ°¤Ë¼¡¤Î¥Ç¡¼¥¿¤ÎžÁ÷½àÈ÷¤¬¤Ç¤­¤Æ¤¤¤ì¤Ð, Á°¤Î¥Ç¡¼¥¿¤Î¥¹¥È¥Ã¥×¥Ó¥Ã¥È¤òÁ÷¤Ã¤¿¸å, ´Ö¤ò¶õ¤±¤º¤Ë ¼¡¤Î¥Ç¡¼¥¿¤Î¥¹¥¿¡¼¥È¥Ó¥Ã¥È¤òÁ÷¤ë¤³¤È¤¬¤Ç¤­¤Þ¤¹.

È󯱴üžÁ÷¥Ç¡¼¥¿¤Ï``¼«¸ÊƱ´ü''¤Ê¤Î¤Ç, žÁ÷¤¹¤ë¤Ù¤­¥Ç¡¼¥¿¤¬¤Ê¤¤¾ì¹ç¤Ï žÁ÷Ï©¤Ï¶õ¤­¾õÂ֤ˤʤê¤Þ¤¹.

UART ¤Î¤½¤Î¾¤Îµ¡Ç½

žÁ÷¤Î¤¿¤á¤Ë¥Ç¡¼¥¿¤ò¥Ñ¥é¥ì¥ë¤«¤é¥·¥ê¥¢¥ë¤ËÊÑ´¹¤·, ¼õ¿®»þ¤Ë ¥·¥ê¥¢¥ë¤«¤é¥Ñ¥é¥ì¥ë¤ËÌ᤹¤È¤¤¤¦´ðËÜŪ¤Êµ¡Ç½¤Î¾¤Ë, UART ¤ÏÄ̾ï, žÁ÷Ï©¤Î¾õÂÖ¤ò¼¨¤·¤¿¤ê, ¥ê¥â¡¼¥È¥Ç¥Ð¥¤¥¹¤Ç¼¡¤Î¥Ç¡¼¥¿¤ò¼õ¤±¤È¤ë½àÈ÷¤¬ ¤Ç¤­¤Æ¤¤¤Ê¤¤¾ì¹ç¤Ë¥Ç¡¼¥¿¤Îή¤ì¤òÍÞÀ©¤¹¤ë¤Î¤Ë »È¤ï¤ì¤ë¿®¹æ¤Î¤¿¤á¤Î ÉղòóÏ©¤â»ý¤Ã¤Æ¤¤¤Þ¤¹. Î㤨¤Ð UART ¤ËÀܳ¤µ¤ì¤Æ¤¤¤ë¥Ç¥Ð¥¤¥¹¤¬¥â¥Ç¥à¤Î¾ì¹ç, ¥â¥Ç¥à¤Ï ²óÀþ¾å¤ËÈÂÁ÷ÇÈ (carrier) ¤¬Â¸ºß¤·¤Æ¤¤¤ë¤³¤È¤òÊó¹ð¤¹¤ë¤«¤â¤·¤ì¤Þ¤»¤ó. °ìÊý, ¥³¥ó¥Ô¥å¡¼¥¿¤Ï¤³¤ì¤é¤ÎÉղÿ®¹æ¤òÁàºî¤¹¤ë¤³¤È¤Ë¤è¤ê ¥â¥Ç¥à¤Î¥ê¥»¥Ã¥È¤ò¤ª¤³¤Ê¤Ã¤¿¤ê, ¤«¤«¤Ã¤Æ¤­¤¿ÅÅÏäò¼è¤é¤Ê¤¤¤è¤¦¤Ë ¥â¥Ç¥à¤Ë»Ø¼¨¤¹¤ë¤«¤â¤·¤ì¤Þ¤»¤ó. ¤³¤ì¤é¤ÎÉղÿ®¹æ¤Îµ¡Ç½¤Ï¤½¤ì¤¾¤ì EIA RE232-C µ¬³Ê¤ÇÄêµÁ¤µ¤ì¤Æ¤¤¤Þ¤¹.

RS-232C ¤È V.24 µ¬³Ê

¤Û¤È¤ó¤É¤Î¥³¥ó¥Ô¥å¡¼¥¿¥·¥¹¥Æ¥à¤Ç¤Ï, UART ¤Ï EIA RS-232C µ¬³Ê¤Ë ½àµò¤·¤¿¿®¹æ¤òÀ¸À®¤¹¤ë¤¿¤á¤Î²óÏ©¤ËÀܳ¤µ¤ì¤Æ¤¤¤Þ¤¹. ¤Þ¤¿, RS-232C ¤Î»ÅÍͤòÈ¿±Ç¤·¤¿, V.24 ¤È¤¤¤¦ CCITT µ¬³Ê¤Ë ½àµò¤·¤¿¥·¥¹¥Æ¥à¤â¸ºß¤·¤Æ¤¤¤Þ¤¹.

RS-232C ¤Î¥Ó¥Ã¥È³ä¤êÅö¤Æ (¥Þ¡¼¥¯¤È¥¹¥Ú¡¼¥¹)

RS-232C ¤Ç¤Ï, 1 ¤ÎÃͤò¥Þ¡¼¥¯, 0 ¤ÎÃͤò¥¹¥Ú¡¼¥¹¤È ¸Æ¤Ó¤Þ¤¹. ÄÌ¿®Ï©¤Ë¥Ç¡¼¥¿¤¬Î®¤ì¤Æ¤¤¤Ê¤¤»þ, ²óÀþ¤Ï``¥Þ¡¼¥­¥ó¥°'' ¤Ç¤¢¤ë¤È¤«, 1 ¤ÎÃͤòϢ³¤·¤ÆÅ¾Á÷¤·Â³¤±¤Æ¤¤¤ë¤È¤«¸À¤ï¤ì¤Þ¤¹.

¥¹¥¿¡¼¥È¥Ó¥Ã¥È¤Ï¾ï¤Ë 0 (¥¹¥Ú¡¼¥¹) ¤Ç, ¥¹¥È¥Ã¥×¥Ó¥Ã¥È¤Ï¾ï¤Ë 1 (¥Þ¡¼¥¯) ¤Ç¤¹. ¤³¤Î¤³¤È¤Ï, ¤¿¤È¤¨Ê£¿ô¤Î¥Ç¡¼¥¿¤¬Ï¢Â³¤·¤ÆÅ¾Á÷¤µ¤ì¤Æ¤¤¤ë¾ì¹ç¤Ç¤â, ¤½¤ì¤¾¤ì¤Î¥Ç¡¼¥¿¤ÎžÁ÷³«»Ï»þ¤Ë¤Ïɬ¤º, ¥Þ¡¼¥¯ (1) ¤«¤é ¥¹¥Ú¡¼¥¹ (0) ¤Ø¤ÎÁ«°Ü¤¬²óÀþ¾å¤Çµ¯¤³¤ë¤È¤¤¤¦¤³¤È¤ò°ÕÌ£¤·¤Æ¤¤¤Þ¤¹.

¤³¤ì¤Ë¤è¤Ã¤Æ, žÁ÷¤µ¤ì¤ë¥Ç¡¼¥¿¥Ó¥Ã¥È¤ÎÆâÍÆ¤Ë¤«¤«¤ï¤é¤º, Á÷¿®Â¦¤È¼õ¿®Â¦¤Î ¥¯¥í¥Ã¥¯¤òƱ´ü¤µ¤»¤ë¤³¤È¤¬¤Ç¤­¤ë¤Î¤Ç¤¹.

¥¹¥È¥Ã¥×¥Ó¥Ã¥È¤È¥¹¥¿¡¼¥È¥Ó¥Ã¥È¤Î´Ö¤Î¶õ¤­»þ´Ö¤Ï, ¤½¤ÎÄÌ¿®Ï©¤Ç 1 ¥Ó¥Ã¥È¤òžÁ÷¤¹¤ë¤Î¤ËɬÍפʻþ´Ö¤ÎÀµ³Î¤ÊÇÜ¿ô¤Ç¤¢¤ë ɬÍפϤ¢¤ê¤Þ¤»¤ó. (ÇÜ¿ô¤Ë¤Ï¥¼¥í¤ò´Þ¤ß¤Þ¤¹). ¤·¤«¤·, ¤Û¤È¤ó¤É¤Î UART ¤Ç¤Ï À߷פÎñ½ã²½¤Î¤¿¤á¤Ë, ÇÜ¿ô¤Ë¤Ê¤ë¤è¤¦¤ËÀ߷פµ¤ì¤Æ¤¤¤Þ¤¹.

RS-232C ¤Ç¤Ï, ¡Ö¥Þ¡¼¥¯¡×¿®¹æ (1) ¤Ï -2V ¤«¤é -12V ¤Î´Ö¤ÎÅ۵¤Ç, ¡Ö¥¹¥Ú¡¼¥¹¡×¿®¹æ (0) ¤Ï 0V ¤«¤é +12V ¤Î´Ö¤ÎÅ۵¤Ç¼¨¤µ¤ì¤Þ¤¹. Á÷¿®Éô¤Ï +12V ¤Þ¤¿¤Ï -12V ¤òÁ÷¤ë¤³¤È¤Ë¤Ê¤Ã¤Æ¤¤¤Æ, ¼õ¿®Éô¤Ç¤Ï Ť¤¥±¡¼¥Ö¥ë¤Ë¤è¤ë¤¤¤¯¤é¤«¤ÎÅ۵¥í¥¹¤ò µöÍÆ¤¹¤ë¤è¤¦¤ËÄê¤á¤é¤ì¤Æ¤¤¤Þ¤¹. (¥Ý¡¼¥¿¥Ö¥ë¥³¥ó¥Ô¥å¡¼¥¿¤Ê¤É¤Ç»ÈÍѤµ¤ì¤Æ¤¤¤ë) Äã¾ÃÈñÅÅÎϥǥХ¤¥¹¤Î Á÷¿®Éô¤Ç¤Ï ¤·¤Ð¤·¤Ð +5V ¤È -5V ¤Î¤ß¤ò»ÈÍѤ·¤Æ¤¤¤Þ¤¹¤¬, û¤¤¥±¡¼¥Ö¥ë¤ò»ÈÍѤ¹¤ë¤Ê¤é¤Ð, ¤³¤ì¤é¤ÎÅ۵¤â RS-232C ¼õ¿®Éô¤Î µöÍÆÈÏ°Ï¤ËÆþ¤Ã¤Æ¤¤¤Þ¤¹.

RS-232C ¤Î¥Ö¥ì¡¼¥¯¿®¹æ

RS-232C ¤Ï ¥Ö¥ì¡¼¥¯ ¤È¸Æ¤Ð¤ì¤ë¿®¹æ¤Ë¤Ä¤¤¤Æ¤âÄê¤á¤Æ¤¤¤Þ¤¹. ¤³¤ì¤Ï (¥¹¥¿¡¼¥È¥Ó¥Ã¥È¤â¥¹¥È¥Ã¥×¥Ó¥Ã¥È¤â̵¤·¤Ç) Ϣ³¤·¤Æ ¥¹¥Ú¡¼¥¹¤ÎÃͤòÁ÷¤ë¤³¤È¤ÇȯÀ¸¤µ¤ì¤Þ¤¹. ¥Ç¡¼¥¿²óÏ©¤ËÅÅή¤¬Î®¤ì¤Æ¤¤¤Ê¤¤¾ì¹ç¤Ï, ²óÀþ¤Ï ¥Ö¥ì¡¼¥¯ ¤òÁ÷¤ê³¤±¤Æ¤¤¤ë¤â¤Î¤È²ò¼á¤µ¤ì¤Þ¤¹.

¥Ö¥ì¡¼¥¯ ¿®¹æ¤Ï´°Á´¤Ê 1 ¥Ð¥¤¥È¤È¥¹¥¿¡¼¥È, ¥¹¥È¥Ã¥×, ¥Ñ¥ê¥Æ¥£ ¥Ó¥Ã¥È¤òÁ÷¤ë¤¿¤á¤ËɬÍפʻþ´Ö¤è¤ê¤â Ť¤´Ö³¤«¤Ê¤±¤ì¤Ð¤Ê¤ê¤Þ¤»¤ó. ¤Û¤È¤ó¤É¤Î UART ¤Ï¥Õ¥ì¡¼¥ß¥ó¥°¥¨¥é¡¼¤È¥Ö¥ì¡¼¥¯¤ò¶èÊ̤¹¤ë¤³¤È¤¬ ¤Ç¤­¤Þ¤¹¤¬, ¤â¤·¤â ¤³¤ì¤ò¶èÊ̤Ǥ­¤Ê¤¤ UART ¤¬¤¢¤Ã¤¿¾ì¹ç, ¥Õ¥ì¡¼¥ß¥ó¥°¥¨¥é¡¼¤Î¸¡½Ð¤ò¥Ö¥ì¡¼¥¯¤Î¼±Ê̤Τ¿¤á¤Ë »ÈÍѤ¹¤ë¤³¤È¤¬¤Ç¤­¤Þ¤¹.

¥Æ¥ì¥¿¥¤¥×¤Î»þÂå¤Ë¤Ï, ¹ñÃæ¤Ç¤ª¤Ó¤¿¤À¤·¤¤¿ô¤Î¥Æ¥ì¥¿¥¤¥×¤¬ (¥Ë¥å¡¼¥¹¥µ¡¼¥Ó¥¹¤Ê¤É¤Ç) ÅÅÀþ¤ÇľÎó¤ËÀܳ¤µ¤ì¤Æ¤¤¤Þ¤·¤¿. Ǥ°Õ¤Î¥Æ¥ì¥¿¥¤¥×¥æ¥Ë¥Ã¥È¤Ï, ÅÅή¤¬Î®¤ì¤Ê¤¤¤è¤¦¤Ë°ì»þŪ¤Ë²óÏ©¤ò ¥ª¡¼¥×¥ó¤Ë¤¹¤ë¤³¤È¤Ç ¥Ö¥ì¡¼¥¯ ¿®¹æ¤òȯÀ¸¤µ¤»¤ë¤³¤È¤¬¤Ç¤­¤Þ¤·¤¿. ¤³¤ì¤Ï, ¾¤Î¥Æ¥ì¥¿¥¤¥×¤¬¾ðÊó¤òÁ÷¿®¤·¤Æ¤¤¤ë´Ö¤Ë, ¶ÛµÞ¥Ë¥å¡¼¥¹¤ò Á÷¤ëɬÍפΤ¢¤ë¥Æ¥ì¥¿¥¤¥×¤¬ ³ä¤ê¹þ¤ß¤ò¤«¤±¤ë¤¿¤á¤Ë»È¤ï¤ì¤Þ¤·¤¿.

¸½ºß¤Î¥·¥¹¥Æ¥à¤Ç¤Ï, ¥Ö¥ì¡¼¥¯¿®¹æ¤Ë¤ÏÆó¤Ä¤Î¥¿¥¤¥×¤¬¤¢¤ê¤Þ¤¹. ¤â¤·¥Ö¥ì¡¼¥¯¿®¹æ¤¬ 1.6 Éäè¤ê¤âŤ±¤ì¤Ð, ¤½¤ì¤Ï ¡Ö¥â¥Ç¥à¥Ö¥ì¡¼¥¯¡×¤Ç¤¢¤ë¤È²ò¼á¤µ¤ì¤Þ¤¹. ¥â¥Ç¥à¤¬¤³¤Î¿®¹æ¤ò¸¡½Ð¤¹¤ë¤È, ÄÌ¿®¤ò½ªÎ»¤·¤ÆÅÅÏäòÀڤ俤ê, ¥³¥Þ¥ó¥É¥â¡¼¥É¤ËÆþ¤ë¤è¤¦¤Ë ¥×¥í¥°¥é¥à¤µ¤ì¤Æ¤¤¤ë¤³¤È¤¬¤¢¤ê¤Þ¤¹. ¤â¤·¥Ö¥ì¡¼¥¯¿®¹æ¤¬ 1.6 Éäè¤ê¤âû¤±¤ì¤Ð, ¤½¤ì¤Ï¥Ç¡¼¥¿¥Ö¥ì¡¼¥¯¤ò ¼¨¤·¤Þ¤¹. ¤³¤Î¿®¹æ¤Ë±þÅú¤¹¤ë¤Î¤Ï¥ê¥â¡¼¥È¥³¥ó¥Ô¥å¡¼¥¿¤Î»Å»ö¤Ç¤¹. ¤³¤Î·Á¤Î¥Ö¥ì¡¼¥¯¤Ï, ¤·¤Ð¤·¤ÐÃí°Õ´­µ¯¤Þ¤¿¤Ï³ä¤ê¹þ¤ß¤Î¤¿¤á¤Î¿®¹æ¤È¤·¤Æ »È¤ï¤ì, ASCII ¤Î CONTROL-C ʸ»ú¤ÎÂåÍѤȤµ¤ì¤ë¤³¤È¤â¤¢¤ê¤Þ¤¹.

¥Þ¡¼¥¯¤È¥¹¥Ú¡¼¥¹¤Ï»æ¥Æ¡¼¥×¥·¥¹¥Æ¥à¤Ç¤Î ``·ê¶õ¤­'' ¤È ``·ê̵¤·'' ¤Ë ÁêÅö¤·¤Æ¤¤¤Þ¤¹.

Note: ¥Ö¥ì¡¼¥¯¿®¹æ¤Ï, »æ¥Æ¡¼¥×¤Þ¤¿¤Ï¤½¤Î¾¤Î¥Ð¥¤¥ÈÎ󤫤éÀ¸À®¤Ç¤­¤Ê¤¤ ¤³¤È¤ËÃí°Õ¤·¤Æ¤¯¤À¤µ¤¤. ¤Ê¤¼¤Ê¤é¥Ð¥¤¥ÈÎó¤Ï¾ï¤Ë¥¹¥¿¡¼¥È¥Ó¥Ã¥È¤ä ¥¹¥È¥Ã¥×¥Ó¥Ã¥È¤È¤È¤â¤ËÁ÷¤é¤ì¤ë¤«¤é¤Ç¤¹. UART ¤Ë¤ÏÄ̾ï, ¥Û¥¹¥È¥×¥í¥»¥Ã¥µ¤«¤é¤ÎÆÃÊ̤ʥ³¥Þ¥ó¥É¤Ë¤è¤ê Ϣ³¤·¤¿¥¹¥Ú¡¼¥¹¿®¹æ¤òÀ¸À®¤¹¤ëǽÎϤ¬¤¢¤ê¤Þ¤¹.

RS-232C ¤Î DTE ¥Ç¥Ð¥¤¥¹¤ª¤è¤Ó DCE ¥Ç¥Ð¥¤¥¹

RS-232C µ¬³Ê¤ÏÆó¤Ä¤Î¥¿¥¤¥×¤ÎÁõÃÖ¤òÄê¤á¤Æ¤¤¤Þ¤¹: ¤½¤ì¤Ï¥Ç¡¼¥¿¥¿¡¼¥ß¥Ê¥ëÁõÃÖ (DTE) ¤È¥Ç¡¼¥¿¥­¥ã¥ê¥¢ÁõÃÖ (DCE) ¤Ç¤¹. Ä̾ï, DTE ¥Ç¥Ð¥¤¥¹¤Ï¥¿¡¼¥ß¥Ê¥ë (¤Þ¤¿¤Ï¥³¥ó¥Ô¥å¡¼¥¿) ¤Ç, DCE ¤Ï ¥â¥Ç¥à¤Ç¤¹. ÅÅÏòóÀþ¤ò²ð¤·¤¿ÄÌ¿®¤Î¤â¤¦°ìÊý¤Îü¤Ç¤¢¤ë¼õ¿®Â¦¤Î¥â¥Ç¥à¤â ¤Þ¤¿ DCE ¥Ç¥Ð¥¤¥¹¤Ç, ¤½¤Î¥â¥Ç¥à¤ËÀܳ¤µ¤ì¤Æ¤¤¤ë¥³¥ó¥Ô¥å¡¼¥¿¤Ï DTE ¥Ç¥Ð¥¤¥¹¤Ç¤¹. DCE ¥Ç¥Ð¥¤¥¹¤¬¿®¹æ¤ò¼õ¤±¼è¤ë¥Ô¥ó¤Ï DTE ¥Ç¥Ð¥¤¥¹¤¬ ¿®¹æ¤òÁ÷¤ë¥Ô¥ó¤Ç¤¢¤ê, ¤Þ¤¿µÕ¤âƱÍͤǤ¹.

Æó¤Ä¤Î¥Ç¥Ð¥¤¥¹¤¬¤È¤â¤Ë DTE ¤Ç¤¢¤Ã¤¿¤ê, ¤È¤â¤Ë DCE ¤Ç¤¢¤Ã¤Æ, ¥â¥Ç¥à¤ä¤½¤ì¤ËÎà»÷¤·¤¿¥á¥Ç¥£¥¢ÊÑ´¹ÁõÃÖ¤ò²ð¤µ¤º¤Ë Àܳ¤¹¤ëɬÍפ¬ ¤¢¤ë¾ì¹ç, ¥Ì¥ë¥â¥Ç¥à (NULL modem) ¤ò»È¤ï¤Ê¤±¤ì¤Ð¤Ê¤ê¤Þ¤»¤ó. ¥Ì¥ë¥â¥Ç¥à¤Ï¥±¡¼¥Ö¥ë¤òÅŵ¤Åª¤ËºÆÇÛÎó¤·, °ìÊý¤Î¥Ç¥Ð¥¤¥¹¤ÎÁ÷¿®½ÐÎϤ¬ ¤â¤¦°ìÊý¤Î¥Ç¥Ð¥¤¥¹¤Î¼õ¿®ÆþÎϤËÀܳ¤µ¤ì, ¤½¤ÎµÕ¤â¤Þ¤¿Æ±ÍÍ¤Ë Àܳ¤µ¤ì¤ë¤è¤¦¤Ë¤·¤Æ¤¯¤ì¤Þ¤¹. ƱÍͤÎÊÑ´¹¤Ï¤¹¤Ù¤Æ¤ÎÀ©¸æ¿®¹æ¤Ë¤Ä¤¤¤Æ¤ª¤³¤Ê¤ï¤ì, ¤½¤ì¤¾¤ì¤Î¥Ç¥Ð¥¤¥¹¤¬ ¾Êý¤Î¥Ç¥Ð¥¤¥¹¤«¤é¤Î DCE (¤Þ¤¿¤Ï DTE) ¿®¹æ¤ò¼õ¤±¤È¤ì¤ë¤è¤¦¤Ë¤Ê¤ê¤Þ¤¹.

DTE ¥Ç¥Ð¥¤¥¹¤È DCE ¥Ç¥Ð¥¤¥¹¤ÇÀ¸À®¤µ¤ì¤ë¿®¹æ¤Î¿ô¤ÏÅù¤·¤¯¤¢¤ê¤Þ¤»¤ó. DTE ¥Ç¥Ð¥¤¥¹¤¬ DCE ¥Ç¥Ð¥¤¥¹¤Î¤¿¤á¤ËÀ¸À®¤¹¤ë¿®¹æ¤Î¿ô¤Ï, DTE ¥Ç¥Ð¥¤¥¹¤¬ DCE ¥Ç¥Ð¥¤¥¹¤«¤é¼õ¤±¤È¤ë¿®¹æ¤Î¿ô¤è¤ê¤â ¾¯¤Ê¤¯¤Ê¤Ã¤Æ¤¤¤Þ¤¹.

RS-232C ¤Î¥Ô¥ó³äÅö¤Æ

EIA ¤Î RS-232C µ¬³Ê (¤ª¤è¤Ó¤³¤ì¤ËÁêÅö¤¹¤ë ITU ¤Î V.24 µ¬³Ê) ¤Ï 25 ¥Ô¥ó¤Î¥³¥Í¥¯¥¿ (Ä̾ï DB25 ¤¬»È¤ï¤ì¤Þ¤¹) ¤òÍ׵ᤷ, ¤½¤Î¥³¥Í¥¯¥¿¤Î¤Û¤È¤ó¤É¤Î¥Ô¥ó¤Î »ÈÍÑÌÜŪ¤òÄêµÁ¤·¤Æ¤¤¤Þ¤¹.

IBM PC ¤ª¤è¤ÓÎà»÷¤Î¥·¥¹¥Æ¥à¤Ç¤Ï, RS-232C ¿®¹æ¤Î¥µ¥Ö¥»¥Ã¥È¤¬ 9 ¥Ô¥ó¤Î¥³¥Í¥¯¥¿ (DB9) ¤ÇÄ󶡤µ¤ì¤Æ¤¤¤Þ¤¹. ¼ç¤ËƱ´ü¥â¡¼¥É¤Ç»ÈÍѤµ¤ì¤ë¿®¹æ¤Ï PC ¤Î¥³¥Í¥¯¥¿¤Ë¤Ï´Þ¤Þ¤ì¤Æ¤¤¤Þ¤»¤ó¤¬, ¤â¤È¤â¤È ¤³¤ÎžÁ÷¥â¡¼¥É¤Ï IBM ¤¬ IBM PC ¤Ç»ÈÍѤ¹¤ë¤³¤È¤Ë¤·¤¿ UART ¤Ç¤Ï¥µ¥Ý¡¼¥È¤µ¤ì¤Æ¤¤¤Þ¤»¤ó.

¥á¡¼¥«¡¼¤Ë¤è¤Ã¤Æ¤Ï RS-232C ÍѤΥ³¥Í¥¯¥¿¤Ë DB25 ¤« DB9, ¤Þ¤¿¤Ï¤½¤Îξ¥¿¥¤¥×¤Î¥³¥Í¥¯¥¿¤ò»È¤Ã¤Æ¤¤¤ë¾ì¹ç¤¬¤¢¤ê¤Þ¤¹. (IBM PC ¤Ï¥Ñ¥é¥ì¥ë¥×¥ê¥ó¥¿¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤Ë¤â DB25 ¥³¥Í¥¯¥¿¤ò »È¤Ã¤Æ¤¤¤ë¤Î¤Ç, ¤³¤Î¤³¤È¤Ï ¤·¤Ð¤·¤Ðº®Íð¤ò°ú¤­µ¯¤³¤·¤Þ¤¹.)

°Ê²¼¤Ï DB25 ¤ª¤è¤Ó DB9 ¥³¥Í¥¯¥¿¤Ë¤ª¤±¤ë RS-232C ¿®¹æ¤Î³ä¤êÅö¤ÆÉ½¤Ç¤¹.

DB25 RS232-C ü»Ò DB9 IBM PC ü»Ò EIA ²óÏ©É乿 CCITT ²óÏ©É乿 °ìÈÌ̾¾Î ¿®¹æ¸» ÀâÌÀ
1 - AA 101 PG/FG - ÊݰÂÍÑÀÜÃÏ
2 3 BA 103 TD DTE Á÷¿®¥Ç¡¼¥¿
3 2 BB 104 RD DCE ¼õ¿®¥Ç¡¼¥¿
4 7 CA 105 RTS DTE Á÷¿®Í×µá
5 8 CB 106 CTS DCE Á÷¿®²Ä
6 6 CC 107 DSR DCE ¥Ç¡¼¥¿¥»¥Ã¥È¥ì¥Ç¥£
7 5 AV 102 SG/GND - ¿®¹æÍÑÀÜÃÏ
8 1 CF 109 DCD/CD DCE ¼õ¿®¥­¥ã¥ê¥¢¸¡½Ð
9 - - - - - ͽÌó (¥Æ¥¹¥ÈÍÑ)
10 - - - - - ͽÌó (¥Æ¥¹¥ÈÍÑ)
11 - - - - - ̤³äÅö¤Æ
12 - CI 122 SRLSD DCE ½¾¶É¼õ¿®¥­¥ã¥ê¥¢¸¡½Ð
13 - SCB 121 SCTS DCE ½¾¶ÉÁ÷¿®²Ä
14 - SBA 118 STD DTE ½¾¶ÉÁ÷¿®¥Ç¡¼¥¿
15 - DB 114 TSET DCE Á÷¿®¿®¹æ¥¨¥ì¥á¥ó¥È¥¿¥¤¥ß¥ó¥°
16 - SBB 119 SRD DCE ½¾¶É¼õ¿®¥Ç¡¼¥¿
17 - DD 115 RSET DCE ¼õ¿®¿®¹æ¥¨¥ì¥á¥ó¥È¥¿¥¤¥ß¥ó¥°
18 - - 141 LOOP DTE ¥í¡¼¥«¥ë¥ë¡¼¥×¥Ð¥Ã¥¯
19 - SCA 120 SRS DTE ½¾¶ÉÁ÷¿®Í×µá
20 4 CD 108.2 DTR DTE ¥Ç¡¼¥¿Ã¼Ëö¥ì¥Ç¥£
21 - - - RDL DTE ¥ê¥â¡¼¥È¥Ç¥¸¥¿¥ë¥ë¡¼¥×¥Ð¥Ã¥¯
22 9 CE 125 RI DCE Èï¸ÆÉ½¼¨
23 - CH 111 DSRS DTE ¥Ç¡¼¥¿¿®¹æÂ®ÅÙÁªÂò
24 - DA 113 TSET DTE Á÷¿®¿®¹æ¥¨¥ì¥á¥ó¥È¥¿¥¤¥ß¥ó¥°
25 - - 142 - DCE ¥Æ¥¹¥È¥â¡¼¥É

¥Ó¥Ã¥È, ¥Ü¡¼, ¤½¤·¤Æ¥·¥ó¥Ü¥ë

¥Ü¡¼¤È¤ÏÈ󯱴üÄÌ¿®¤Ë¤ª¤±¤ëžÁ÷®ÅÙ¤Îñ°Ì¤Ç¤¹. ¥â¥Ç¥àÄÌ¿®µ»½Ñ¤Î¿ÊÊâ¤Ë¤è¤ê, ¿·¤·¤¤¥Ç¥Ð¥¤¥¹¤Î¥Ç¡¼¥¿Â®ÅÙ¤ò ɽµ­¤¹¤ë¤Ë¤¢¤¿¤Ã¤Æ, ¤³¤ÎÍѸ줬 ¤·¤Ð¤·¤Ð¸í¤Ã¤Æ»È¤ï¤ì¤ë¤è¤¦¤Ë¤Ê¤ê¤Þ¤·¤¿.

¥Ü¡¼¥ì¡¼¥È¤ÏÅÁÅýŪ¤Ë, ÄÌ¿®Ï©¤òÄ̤·¤Æ¼ÂºÝ¤ËÁ÷¤é¤ì¤ë¥Ó¥Ã¥È¤Î¿ô¤ò ɽ¤·¤Þ¤¹. ¤¢¤ë DTE ¥Ç¥Ð¥¤¥¹¤«¤é¤â¤¦°ìÊý¤Ø¤È¼ÂºÝ¤Ë°Üư¤·¤¿ ¥Ç¡¼¥¿¤ÎÎ̤òɽ¤¹¤â¤Î¤Ç¤Ï¤¢¤ê¤Þ¤»¤ó. ¥Ü¡¼¥ì¡¼¥È¤Ï, Á÷¿®Â¦ UART ¤ÇÀ¸À®¤µ¤ì¤Æ¼õ¿®Â¦ UART ¤Ç¼è¤ê½ü¤«¤ì¤ë ¥¹¥¿¡¼¥È, ¥¹¥È¥Ã¥×, ¥Ñ¥ê¥Æ¥£¤È¤¤¤Ã¤¿¥ª¡¼¥Ð¡¼¥Ø¥Ã¥É¥Ó¥Ã¥È¤ò¤â ´Þ¤ó¤Ç¤¤¤Þ¤¹. ¤³¤ì¤Ï 1 ¥ï¡¼¥É 7 ¥Ó¥Ã¥È¤Î¥Ç¡¼¥¿¤òÁ÷¤ë¤¿¤á¤Ë¤Ï, ¼ÂºÝ¤Ë¤Ï 10 ¥Ó¥Ã¥È¤Î ¥Ç¡¼¥¿¤¬´°Á´¤ËžÁ÷¤µ¤ì¤ëɬÍפ¬¤¢¤ë¤È¤¤¤¦¤³¤È¤ò°ÕÌ£¤·¤Þ¤¹. ¤½¤Î¤¿¤á, ¤â¤·¥Ñ¥ê¥Æ¥£¤ò»È¤¤, ¥¹¥¿¡¼¥È¥Ó¥Ã¥È¤È¥¹¥È¥Ã¥×¥Ó¥Ã¥È¤¬ ¤½¤ì¤¾¤ì 1 ¥Ó¥Ã¥È¤º¤Ä¸ºß¤¹¤ë¾ì¹ç¤Ë¤Ï, 1 É䢤¿¤ê 300 ¥Ó¥Ã¥È¤Î žÁ÷ǽÎϤò»ý¤Ä¥â¥Ç¥à¤Ç¤Ï, 7 ¥Ó¥Ã¥È¤Î¥ï¡¼¥É¤òÄ̾ï 30 ¸Ä¤·¤« žÁ÷¤¹¤ë¤³¤È¤¬¤Ç¤­¤Þ¤»¤ó.

¤â¤· 1 ¥ï¡¼¥É 8 ¥Ó¥Ã¥È¤Î¥Ç¡¼¥¿¤È¥Ñ¥ê¥Æ¥£¥Ó¥Ã¥È¤ò»ÈÍѤ¹¤ë¾ì¹ç¤Ë¤Ï, ¥Ç¡¼¥¿Å¾Á÷®ÅÙ¤Ï 1 É䢤¿¤ê 27.27 ¥ï¡¼¥É¤Þ¤ÇÄã²¼¤·¤Þ¤¹. ¤Ê¤¼¤Ê¤é 8 ¥Ó¥Ã¥È¤Î¥ï¡¼¥É¤òÁ÷¤ë¤Î¤Ë 11 ¥Ó¥Ã¥È¤¬É¬ÍפÇ, ¤³¤Î¥â¥Ç¥à¤Ï 1 ÉÃ´Ö¤Ë 300 ¥Ó¥Ã¥È¤·¤«Á÷¤ë¤³¤È¤¬¤Ç¤­¤Ê¤¤¤«¤é¤Ç¤¹.

1 É䢤¿¤ê¤ÎžÁ÷¥Ð¥¤¥È¿ô¤ò¥Ü¡¼¥ì¡¼¥È¤ËÊÑ´¹¤·¤¿¤ê, ¤½¤ÎµÕ¤ò¤ª¤³¤Ê¤¦ ·×»»¼°¤Ï, ¥¨¥é¡¼ÄûÀµ¤ò¤ª¤³¤Ê¤¦¥â¥Ç¥à¤¬¸½¤ì¤ë¤Þ¤Ç¤Ïñ½ã¤Ç¤·¤¿. ¥¨¥é¡¼ÄûÀµ¤ò¤ª¤³¤Ê¤¦¥â¥Ç¥à¤Ï, ¥Û¥¹¥È¥³¥ó¥Ô¥å¡¼¥¿¤Î UART ¤«¤é ¥·¥ê¥¢¥ë¤Î¥Ó¥Ã¥ÈÎó¤ò¼õ¤±¤È¤ê, ¤½¤ì¤ò¥Ð¥¤¥ÈÎó¤ËÌᤷ¤Þ¤¹. (Æâ¢¥â¥Ç¥à¤ò»ÈÍѤ·¤Æ¤¤¤ë¾ì¹ç¤Ç¤µ¤¨, ¥Ç¡¼¥¿¤Ïº£¤Þ¤ÇÄ̤ê ÉÑÈˤ˥·¥ê¥¢¥ë²½¤µ¤ì¤Þ¤¹) ¤½¤Î¸å¤³¤ì¤é¤Î¥Ð¥¤¥È¤Ï¥Ñ¥±¥Ã¥È¤ËÊÑ´¹¤µ¤ì, Ʊ´üžÁ÷Êý¼°¤òÍѤ¤¤Æ ÅÅÏòóÀþ¤òÄ̤¸¤ÆÁ÷¿®¤µ¤ì¤Þ¤¹. ¤³¤ì¤Ï DTE (¥³¥ó¥Ô¥å¡¼¥¿) Ãæ¤Î UART ¤ÇÄɲ䵤줿¥¹¥È¥Ã¥×, ¥¹¥¿¡¼¥È ¤ª¤è¤Ó¥Ñ¥ê¥Æ¥£¥Ó¥Ã¥È¤Ï, ¥â¥Ç¥à¤«¤éÁ÷¤ê½Ð¤µ¤ì¤ëÁ°¤Ë, ¥â¥Ç¥à¤Ë¤è¤Ã¤Æ ¼è¤ê½ü¤«¤ì¤ë¤È¤¤¤¦¤³¤È¤ò°ÕÌ£¤·¤Þ¤¹. ¤³¤ì¤é¤Î¥Ð¥¤¥ÈÎ󤬥ê¥â¡¼¥È¥â¥Ç¥à¤Ë¼õ¿®¤µ¤ì¤ë¤È, ¥ê¥â¡¼¥È¥â¥Ç¥à¤Ï ¥¹¥¿¡¼¥È, ¥¹¥È¥Ã¥×¤ª¤è¤Ó¥Ñ¥ê¥Æ¥£¥Ó¥Ã¥È¤òÄɲä·¤Æ, ¤½¤ì¤é¤ò ¥·¥ê¥¢¥ë·Á¼°¤ËÊÑ´¹¤·, ¥ê¥â¡¼¥È¥³¥ó¥Ô¥å¡¼¥¿¤Î¼õ¿®Â¦ UART ¤ËÁ÷¤ê¤Þ¤¹. ¤½¤·¤Æ¥ê¥â¡¼¥È¥³¥ó¥Ô¥å¡¼¥¿¤Î UART ¤Ï¥¹¥¿¡¼¥È, ¥¹¥È¥Ã¥×¤ª¤è¤Ó ¥Ñ¥ê¥Æ¥£¥Ó¥Ã¥È¤ò¼è¤ê½ü¤­¤Þ¤¹.

¤³¤ì¤é¤ÎÆÃÊ̤ÊÊÑ´¹¤Ï¤¹¤Ù¤Æ, Æó¤Ä¤Î¥â¥Ç¥à¤Î´Ö¤Ç¥¨¥é¡¼ÄûÀµ¤¬ ¼Â¹Ô¤Ç¤­¤ë¤è¤¦¤Ë¤¹¤ë¤¿¤á¤ª¤³¤Ê¤ï¤ì¤Æ¤¤¤Þ¤¹. ¥¨¥é¡¼ÄûÀµ¤È¤Ï, ¼õ¿®Â¦¤Î¥â¥Ç¥à¤¬Àµ¤·¤¤¥Á¥§¥Ã¥¯¥µ¥à¤Ç ¼õ¿®¤Ç¤­¤Ê¤«¤Ã¤¿¥Ç¡¼¥¿¥Ö¥í¥Ã¥¯¤ÎºÆÁ÷¤ò, Á÷¿®Â¦¤Î¥â¥Ç¥à¤ËÍ׵᤹¤ë¤³¤È¤¬¤Ç¤­¤ë¤È¤¤¤¦¤³¤È¤Ç¤¹. ¤³¤Îºî¶È¤Ï¥â¥Ç¥à¤Ë¤è¤ê½èÍý¤µ¤ì¤Æ, DTE ¥Ç¥Ð¥¤¥¹¤Ï ¤³¤Î¤è¤¦¤Ê¥×¥í¥»¥¹¤¬¤ª¤³¤Ê¤ï¤ì¤Æ¤¤¤ë¤³¤È¤Ë, Ä̾ﵤ¤¬¤Ä¤­¤Þ¤»¤ó.

¥¹¥¿¡¼¥È, ¥¹¥È¥Ã¥×¤ª¤è¤Ó¥Ñ¥ê¥Æ¥£¥Ó¥Ã¥È¤ò¼è¤ê½ü¤¯¤³¤È¤Ë¤è¤ê, ¥¨¥é¡¼ÄûÀµ¤Î¤¿¤á¤ËÆó¤Ä¤Î¥â¥Ç¥à¤Î´Ö¤Ç¶¦Í­¤·¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤ ÄɲäΥӥåȤò, ¼Â¸úžÁ÷®ÅÙ¤òÄã²¼¤µ¤»¤º¤ËÁ÷¤ë¤³¤È¤¬¤Ç¤­¤Þ¤¹. ¤½¤Î¤¿¤á, Á÷¼õ¿® DTE ¤Ë¤Ï¥¨¥é¡¼ÄûÀµ¤¬¤ª¤³¤Ê¤ï¤ì¤Æ¤¤¤ë¤«¤É¤¦¤«¤¬ ¤Û¤È¤ó¤É¸«¤¨¤Ê¤¯¤Ê¤ê¤Þ¤¹. Î㤨¤Ð, ¤â¤·¥â¥Ç¥à¤¬ 10 ¸Ä¤Î 7 ¥Ó¥Ã¥È¥Ç¡¼¥¿¤ò¤â¤¦°ìÊý¤Î¥â¥Ç¥à¤ËÁ÷¤ë ºÝ¤Ë, ¥¹¥¿¡¼¥È, ¥¹¥È¥Ã¥×, ¤ª¤è¤Ó¥Ñ¥ê¥Æ¥£¥Ó¥Ã¥È¤òÁ÷¤ëɬÍפ¬¤Ê¤±¤ì¤Ð, ¤½¤Îʬ¤Î 30 ¥Ó¥Ã¥È¤Î¾ðÊó¤ò, ¿¿¤Î¥Ç¡¼¥¿¤ÎžÁ÷®Å٤˱ƶÁ¤òÍ¿¤¨¤ë¤³¤È¤Ê¤¯ ¥¨¥é¡¼ÄûÀµ¤Î¤¿¤á¤ËÄɲ乤뤳¤È¤¬¤Ç¤­¤ë¤ï¤±¤Ç¤¹.

¥Ç¡¼¥¿°µ½Ì¤ò¤ª¤³¤Ê¤¦¥â¥Ç¥à¤Ç¤Ï, ¥Ü¡¼¤È¤¤¤¦¸ÀÍդλȤ¤Êý¤Ï ¤µ¤é¤Ëº®Í𤹤뤳¤È¤Ë¤Ê¤ê¤Þ¤¹. Î㤨¤ÐÅÅÏòóÀþ¤òÄ̤¸¤ÆÁ÷¤é¤ì¤¿Æó¤Ä¤Î 8 ¥Ó¥Ã¥È¥Ç¡¼¥¿¤Ï, Á÷¿®Â¦¥â¥Ç¥à¤ËÁ÷¤é¤ì¤¿ 12 ¥Ð¥¤¥È¤Î¥Ç¡¼¥¿¤òɽ¤¹¤«¤â¤·¤ì¤Þ¤»¤ó. ¼õ¿®Â¦¥â¥Ç¥à¤Ï¤½¤Î¥Ç¡¼¥¿¤òËÜÍè¤ÎÆâÍÆ¤ËŸ³«¤·, ¼õ¿®Â¦¤Î DTE ¤ËÅϤ·¤Þ¤¹.

¤Þ¤¿, ºÇ¶á¤Î¥â¥Ç¥à¤Ï¥Ð¥Ã¥Õ¥¡¤òÆâ¢¤·¤Æ¤ª¤ê, (DCE ¤«¤é DCE ¤Ø) ÅÅÏÃÀþ¤ò ή¤ì¤ë¥Ç¡¼¥¿¤ÎžÁ÷®ÅÙ¤È, ξü¤Î DTE ¤È DCE ¤Î´Ö¤Çή¤ì¤ë¥Ç¡¼¥¿¤Î žÁ÷®Å٤ȤòÊÌ¡¹¤ËÀßÄꤹ¤ë¤³¤È¤¬¤Ç¤­¤Þ¤¹. ¥â¥Ç¥à¤Ë¤è¤ë°µ½Ì¤ò»ÈÍѤ¹¤ë¾ì¹ç, Ä̾ï¤Ï DTE ¤È DCE ¤Î´Ö¤Î®ÅÙ¤ò DCE ¤È DCE ¤Î´Ö¤Î®ÅÙ¤è¤ê®¤¯¤·¤Æ¤ª¤­¤Þ¤¹.

1 ¥Ð¥¤¥È¤òµ­½Ò¤¹¤ë¤Î¤ËɬÍפʥӥåȤοô¤Ï, Æó¤Ä¤Î¥Þ¥·¥ó¤Î´Ö¤Ç¤â DTE-DCE ¤È DCE-DCE ¤Î¥ê¥ó¥¯¤Ç¤½¤ì¤¾¤ìÊѲ½¤¹¤ë¾ì¹ç¤¬¤¢¤ê¤Þ¤¹¤·, ¤½¤Î¤¦¤¨, ¤½¤ì¤¾¤ì¤Î¥Ó¥Ã¥ÈžÁ÷®ÅÙ¤¬°Û¤Ê¤ë¾ì¹ç¤â¤¢¤ê¤Þ¤¹. ¤½¤Î¤¿¤á, Á´ÂΤȤ·¤Æ¤ÎÄÌ¿®Â®ÅÙ¤òɽ¸½¤¹¤ë¤¿¤á¤Ë ¥Ü¡¼¤È¤¤¤¦¸ÀÍÕ¤ò»È¤¦¤³¤È¤Ï ÌäÂê¤Ç¤â¤¢¤ê¤Þ¤¹¤·, ¿¿¤ÎžÁ÷®ÅÙ¤òÀµ¤·¤¯ÅÁ¤¨¤Ê¤¤¾ì¹ç¤¬¤¢¤ê¤Þ¤¹. 1 É䢤¿¤ê¤ÎžÁ÷¥Ó¥Ã¥È¿ô (bps) ¤Ï DCE ¤È DCE ¤Î´Ö¤Î¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤Ë ¤ª¤±¤ëžÁ÷®ÅÙ¤òµ­½Ò¤¹¤ë¤¿¤á¤Ë»È¤¦¤Ê¤éÀµ¤·¤¤ÍѸì¤Ç¤¹¤·, ¥Ü¡¼¤Þ¤¿¤Ï 1 É䢤¿¤ê¤Î¥Ó¥Ã¥È¿ô¤Ï, Æó¤Ä¤Î¥·¥¹¥Æ¥à¤¬ÅÅÀþ¤ÇľÀÜ Àܳ¤µ¤ì¤Æ¤¤¤¿¤ê, ¥¨¥é¡¼ÄûÀµ¤ä°µ½Ì¤ò¤ª¤³¤Ê¤ï¤Ê¤¤¥â¥Ç¥à¤¬ »È¤ï¤ì¤Æ¤¤¤ë¾ì¹ç¤Ë¤Ï, µöÍÆ²Äǽ¤ÊÍѸì¤Ç¤¹.

ºÇ¶á¤Î¹â®¥â¥Ç¥à (2400, 9600, 14,400, 19,200bps ¤Ê¤É¤Î¤â¤Î) ¤â, ¼ÂºÝ¤Ë¤Ï 2,400 ¥Ü¡¼ (Àµ³Î¤Ë¤Ï 2,400 ¥·¥ó¥Ü¥ë/ÉÃ) ¤«, ¤½¤ì°Ê²¼¤Î ®ÅÙ¤ÇÄÌ¿®¤·¤Æ¤¤¤Þ¤¹. ¹â®¥â¥Ç¥à¤Ç¤Ï, Ê£¿ô¤Î¥Ó¥Ã¥È¤ò°ì¤Ä¤Î¥·¥ó¥Ü¥ë¤Ç ÅÁÁ÷¤¹¤ëµ»½Ñ (¿ÃÍÉä¹ç²½¤Ê¤É) ¤òÍѤ¤¤Æ, ¥·¥ó¥Ü¥ë®ÅÙ (¥·¥ó¥Ü¥ë/ÉÃ) ¤è¤ê¤â ¹â¤¤ÄÌ¿®Â®ÅÙ (¥Ó¥Ã¥È/ÉÃ) ¤òãÀ®¤·¤Æ¤¤¤Þ¤¹. ¤³¤ì¤¬ÅÅÏäθ¤é¤ì¤¿²»À¼ÂÓ°è¤Ç ¹â¤¤ÅÁÁ÷®ÅÙ¤òÆÀ¤é¤ì¤ëÍýͳ¤Ç¤¹. 28,800bps ¤ä¤½¤ì°Ê¾å¤Î¥â¥Ç¥à¤Ç¤Ï, ¥·¥ó¥Ü¥ë®ÅÙ¼«ÂΤ¬ ²ÄÊѤˤʤäƤ¤¤Þ¤¹¤¬, ¤½¤ì°Ê³°¤ÏƱÍͤε»½Ñ¤¬ÍѤ¤¤é¤ì¤Æ¤¤¤Þ¤¹.

IBM PC ¤Î UART

¸µÁÄ IBM PC ¤òÀ߷פ·¤¿ºÝ¤Ë, IBM ¤Ï¥Ê¥·¥ç¥Ê¥ë¡¦¥»¥ß¥³¥ó¥À¥¯¥¿¼Ò¤Î INS8250 UART ¤ò IBM PC ¥Ñ¥é¥ì¥ë/¥·¥ê¥¢¥ë¥¢¥À¥×¥¿¤Ç»ÈÍѤ¹¤ë¤³¤È¤Ë ·è¤á¤Þ¤·¤¿.

IBM ¼«¿È¤ä¤½¤Î¾¤Î¥Ù¥ó¥À¤¬ºî¤Ã¤Æ¤¤¤ë¸å·ÑÀ¤Âå¤Î AT ¸ß´¹µ¡¤Ç¤â, INS8250 ¤½¤Î¤â¤Î¤ä¥Ê¥·¥ç¥Ê¥ë¡¦¥»¥ß¥³¥ó¥À¥¯¥¿¤Î UART ¥Õ¥¡¥ß¥ê¤Î ²þÎÉÈǤò»È¤¤Â³¤±¤é¤ì¤Æ¤¤¤Þ¤¹.

¥Ê¥·¥ç¥Ê¥ë¡¦¥»¥ß¥³¥ó¥À¥¯¥¿¤Î UART ¥Õ¥¡¥ß¥ê·ÏÅý¿Þ

INS8250 UART ¤Ë¤Ï¤¤¤¯¤Ä¤«¤Î¥Ð¡¼¥¸¥ç¥ó¤È¸å·Ñ¤ÎÉôÉʤ¬¤¢¤ê¤Þ¤¹. ¼çÍפʥС¼¥¸¥ç¥ó¤ò°Ê²¼¤Ë¼¨¤·¤Þ¤¹.

INS8250  -> INS8250B
    \
     \
      \-> INS8250A -> INS82C50A
            \
             \
          \-> NS16450 -> NS16C450
               \
                    \
                 \-> NS16550 -> NS16550A -> PC16550D
INS8250

¤³¤ÎÉôÉʤϸµÁÄ IBM PC ¤È IBM PC/XT ¤Ç »È¤ï¤ì¤Æ¤¤¤Þ¤·¤¿. ¤³¤ÎÉôÉʤÏËÜÍè INS8250 ACE (Asynchronous Communications Element) ¤È ¤¤¤¦Ì¾Á°¤Ç, NMOS µ»½Ñ¤Çºî¤é¤ì¤Æ¤¤¤Þ¤·¤¿.

8250 ¤ÏȬ¤Ä¤Î I/O ¥Ý¡¼¥È¤òÀêÍ­¤·, Á÷¿®¥Ð¥Ã¥Õ¥¡ 1 ¥Ð¥¤¥È¤È ¼õ¿®¥Ð¥Ã¥Õ¥¡ 1 ¥Ð¥¤¥È¤ò»ý¤Ã¤Æ¤¤¤Þ¤¹. ¤³¤Î¸µÁĤΠUART ¤Ï¤¤¤¯¤Ä¤«¤Î ¶¥¹ç¾õÂ֤ʤɤ˴ؤ¹¤ë·ç´Ù¤ò»ý¤Ã¤Æ¤¤¤Þ¤¹. ¸µÁĤΠIBM BIOS ¤Ï¤³¤ì¤é¤Î·ç´Ù¤ò²óÈò¤·¤Æ¤¦¤Þ¤¯Æ°¤¯¤è¤¦¤Ê¥³¡¼¥É¤ò ´Þ¤ó¤Ç¤¤¤Þ¤·¤¿¤¬, ¤½¤Î¤¿¤á¤Ë BIOS ¤¬·ç´Ù¤Î¸ºß¤Ë°Í¸¤¹¤ë¤è¤¦¤Ë ¤Ê¤Ã¤Æ¤·¤Þ¤¤¤Þ¤·¤¿. ¤³¤Î¤¿¤á, ¸µÁÄ IBM PC ¤ä IBM PC/XT ¤Ç¤Ï 8250A, 16450, ¤Þ¤¿¤Ï 16550 ¤Î¤è¤¦¤Ê¸å·ÑÉôÉʤò»È¤¦¤³¤È¤Ï ¤Ç¤­¤Þ¤»¤ó¤Ç¤·¤¿.

INS8250-B

¤³¤ì¤Ï NMOS µ»½Ñ¤Çºî¤é¤ì¤¿ INS8250 ¤ÎÄã®ÈǤǤ¹. ¤³¤ì¤â¥ª¥ê¥¸¥Ê¥ë¤Î INS8250 ¤ÈƱ¤¸ÌäÂê¤ò´Þ¤ó¤Ç¤¤¤Þ¤¹.

INS8250A

XMOS µ»½Ñ¤ò»È¤¤, ¤µ¤Þ¤¶¤Þ¤Êµ¡Ç½Åª·ç´Ù¤ò½¤Àµ¤·¤¿ INS8250 ¤Î²þÎÉÈǤǤ¹. INS8250A ¤ÏÅö½é, ``¥¯¥ê¡¼¥ó''¤Ê BIOS ¤ò »ÈÍѤ·¤¿¥Ù¥ó¥À¤Î PC ¥¯¥í¡¼¥ó¤Ç»ÈÍѤµ¤ì¤Æ¤¤¤Þ¤·¤¿. ¤Ê¤¼¤Ê¤é·ç´Ù¤¬½¤Àµ¤µ¤ì¤¿¤³¤È¤Ë¤è¤ê, ¤³¤ÎÉôÉÊ¤Ï INS8250 ¤ä INS8250B ¤Î ¤¿¤á¤Ë½ñ¤«¤ì¤¿ BIOS ¤Ç»È¤¦¤³¤È¤Ï¤Ç¤­¤Ê¤«¤Ã¤¿¤«¤é¤Ç¤¹.

INS82C50A

¤³¤ì¤Ï INS8250A ¤Î CMOS ÈÇ (Äã¾ÃÈñÅÅÎÏÈÇ) ¤Ç, INS8250A ¤ÈƱ¤¸µ¡Ç½ÆÃÀ­¤ò»ý¤Ã¤Æ¤¤¤Þ¤¹.

NS16450

¤è¤ê¹â®¤Ê CPU ¥Ð¥¹¤Ë¤âÂбþ¤Ç¤­¤ë¤è¤¦¤Ë ²þÎɤµ¤ì¤¿¤³¤È°Ê³°¤Ï NS8250A ¤ÈƱ¤¸¤Ç¤¹. IBM ¤Ï¤³¤ÎÉôÉʤò IBM AT ¤Ç»È¤¦¤³¤È¤Ë·è¤á, ¤â¤Ï¤ä IBM BIOS ¤¬ INS8250 ¤Î¥Ð¥°¤Ë°Í¸¤·¤Ê¤¯¤Ê¤ë¤è¤¦¤Ë Êѹ¹¤ò¤ª¤³¤Ê¤¤¤Þ¤·¤¿.

NS16C450

¤³¤ì¤Ï NS16450 ¤Î CMOS ÈÇ (Äã¾ÃÈñÅÅÎÏÈÇ) ¤Ç¤¹.

NS16550

Á÷¿®¥Ð¥Ã¥Õ¥¡¤È¼õ¿®¥Ð¥Ã¥Õ¥¡¤ò¤½¤ì¤¾¤ì 16 ¥Ð¥¤¥È¤Ë Êѹ¹¤·¤¿¤³¤È°Ê³°¤Ï NS16450 ¤ÈƱ¤¸¤Ç¤¹¤¬, ¥Ð¥Ã¥Õ¥¡¤ÎÀß·×¤Ë ·ç´Ù¤¬¤¢¤ë¤¿¤á, ¿®Íꤷ¤Æ»ÈÍѤ¹¤ë¤³¤È¤Ï¤Ç¤­¤Þ¤»¤ó.

NS16550A

¥Ð¥Ã¥Õ¥¡¤Î·ç´Ù¤¬½¤Àµ¤µ¤ì¤¿¤³¤È°Ê³°¤Ï NS16550 ¤È Ʊ¤¸¤Ç¤¹. ³ä¤ê¹þ¤ß¤Ø¤ÎÈ¿±þ¤¬ÃÙ¤¤ OS ¤Ç¤â¹â¤¤¿®ÍêÀ­¤Ç¹â®¤Ê¥Ç¡¼¥¿¤ò °·¤¦¤³¤È¤¬¤Ç¤­¤ë¤³¤È¤«¤é, 16550A ¤È¤½¤Î¸å·ÑÉôÉÊ¤Ï PC »º¶È³¦¤Ç ºÇ¤â°ìÈÌŪ¤Ë»È¤ï¤ì¤ë UART ¤È¤Ê¤ê¤Þ¤·¤¿.

NS16C552

¤³¤ì¤Ï 2 ¸Ä¤Î NS16C550A CMOS UART¤ò °ì¤Ä¤Î¥Ñ¥Ã¥±¡¼¥¸¤ËÆþ¤ì¤¿ÉôÉʤǤ¹.

PC16550D

¤µ¤µ¤¤¤Ê·ç´Ù¤¬½¤Àµ¤µ¤ì¤¿¤³¤È°Ê³°¤Ï NS16550A ¤È Ʊ¤¸¤Ç¤¹. ¤³¤ì¤Ï 16550 ¥Õ¥¡¥ß¥ê¤Î D ¥ê¥Ó¥¸¥ç¥ó¤Ç, ¥Ê¥·¥ç¥Ê¥ë¡¦¥»¥ß¥³¥ó¥À¥¯¥¿¼Ò¤«¤é Ä󶡤µ¤ì¤Æ¤¤¤ëºÇ¿·¤ÎÉôÉʤǤ¹.

NS16550AF¤ÈPC16550D¤ÏƱ¤¸¤â¤Î

( ¤³¤³¤«¤é¤Ï ´äºê Ëþ ¤¬ËÝÌõ¤òôÅö)

¥Ê¥·¥ç¥Ê¥ë¡¦¥»¥ß¥³¥ó¥À¥¯¥¿¤Ï ¿ôǯÁ°¤ËÉôÉÊÈÖ¹æÂηϤòºÆÊÔÀ®¤·¤Æ ¤ª¤ê, NS16550AFN ¤È¤¤¤¦Ì¾¾Î¤Ï¤â¤Ï¤ä¸ºß¤·¤Þ¤»¤ó. (¤â¤·¤¢¤Ê¤¿¤¬ NS16550AFN ¤ò»ý¤Ã¤Æ¤¤¤¿¤é, ÉôÉÊ¤ÎÆüÉÕ¥³¡¼¥É¤ò¸«¤Æ¤¯¤À¤µ¤¤. ¤½¤ì¤Ï Ä̾ï 9 ¤«¤é»Ï¤Þ¤ë4·å¤Î¿ô»ú¤Ç¤¹. ºÇ½é¤Î2·å¤Î¿ô»ú¤ÏǯÅÙ, ¼¡¤Î2·å ¤ÏÉôÉʤ¬¥Ñ¥Ã¥±¡¼¥¸¤µ¤ì¤¿Ç¯Å٤νµ¤Ç¤¹. ¤¢¤Ê¤¿¤Î»ý¤Ã¤Æ¤¤¤ë NS16550AFN ¤Ï, ¤ª¤½¤é¤¯¿ôǯÁ°¤Î¤â¤Î¤Ç¤·¤ç¤¦.)

¿·¤·¤¤ÈÖ¹æ¤Ï PC16550DV ¤ÎÍͤË, ¥Ñ¥Ã¥±¡¼¥¸ºàÎÁ¤È·Á¾õ¤Ë¤è¤êÀÜÈø¼­ ¤Ë¾®¤µ¤Ê°ã¤¤¤¬¤¢¤ê¤Þ¤¹ (ÈÖ¹æÂηϤˤĤ¤¤Æ¤Îµ­½Ò¤Ï¸å½Ò¤·¤Þ¤¹).

¤³¤³¤ÇÃí°Õ¤·¤Ê¤±¤ì¤Ð¤¤¤±¤Ê¤¤¤³¤È¤¬¤¢¤ê¤Þ¤¹. Î㤨¤Ð, ¤¢¤ëŹ¤Ë¹Ô¤Ã¤Æ 1990ǯÀ½¤Î NS16550AFN ¤ò15ÊÆ¥É¥ë¤ÇÇä¤Ã¤Æ¤¤¤ë¤È¤·¤Þ¤¹. ¤È¤³¤í¤¬, ¤½¤Î¤¹¤°ÎÙ¤Ë¤Ï ¥Ê¥·¥ç¥Ê¥ë¡¦¥»¥ß¥³¥ó¥À¥¯¥¿¤¬ AFN ¤òÀ¸»º³«»Ï¤·¤Æ¤«¤é ¤½¤ì¤Ë¥Þ¥¤¥Ê¡¼¤ÊÊѹ¹¤ò²Ã¤¨¤Æºî¤Ã¤¿ PC16550DN ¤¬¤¢¤ê, ¤½¤Á¤é¤Ï ºÇ¶á 6¥ö·î¤Ëºî¤é¤ì¤¿¤â¤Î¤Ê¤Î¤Ë, ´Êñ¤ËÆþ¼ê¤Ç¤­¤ë¤¿¤á NS16550AFN ¤Î Ⱦ³Û (¤¿¤¯¤µ¤ó°ìÅÙ¤ËÇ㤦¤È 5ÊÆ¥É¥ë¤Þ¤Ç²¼¤¬¤ë¤³¤È¤â¤¢¤ê¤Þ¤¹) °Ì¤Ç Ç㤨¤¿¤ê¤¹¤ë¤³¤È¤¬¤¢¤ë¤Î¤Ç¤¹.

NS16550AFN ¤Î¥Á¥Ã¥×¶¡µë¤Ï¸º¾¯¤·Â³¤±¤Æ¤¤¤ë¤¿¤á, PC16550DN ¤¬¸Å¤¤ ÉôÉÊÈÖ¹æ¤Î¤â¤Î¤È¤Þ¤Ã¤¿¤¯Æ±¤¸µ¡Ç½¤ò»ý¤Ã¤Æ¤¤¤ë¤³¤È¤Ë, ¤è¤ê¿¤¯¤Î¿Í¤¬ µ¤ÉÕ¤¤¤Æ¼õ¤±Æþ¤ì¤ë¤Þ¤Ç¤Ï, ²Á³Ê¤Ï¤ª¤½¤é¤¯¾å¾º¤·Â³¤±¤ë¤Ç¤·¤ç¤¦.

¥Ê¥·¥ç¥Ê¥ë¡¦¥»¥ß¥³¥ó¥À¥¯¥¿¤ÎÉôÉÊÈÖ¹æÂηÏ

¸Å¤¤ NSnnnnnrqp ¤ÎÉôÉÊÈÖ¹æ¤Ï, ¸½ºß PCnnnnnrgp ¤È¤¤¤¦¥Õ¥©¡¼¥Þ¥Ã¥È¤Ë¤Ê¤Ã¤Æ¤¤¤Þ¤¹.

r ¤Ï¥ê¥Ó¥¸¥ç¥ó¤Î¥Õ¥£¡¼¥ë¥É¤Ç¤¹. ¸½ºß¤Î¥Ê¥·¥ç¥Ê¥ë¥» ¥ß¥³¥ó¥À¥¯¥¿¤Î 16550 ¤Î¥ê¥Ó¥¸¥ç¥ó¤ÏD¤Ç¤¹.

p ¤Ï¥Ñ¥Ã¥±¡¼¥¸¥¿¥¤¥×¤Î¥Õ¥£¡¼¥ë¥É¤Ç¤¹. ¥¿¥¤¥×¤Ï°Ê²¼ ¤ÎÄ̤ê¤Ç¤¹:

"F" QFP (quad flat pack) L lead type
"N" DIP (dual inline package) through hole straight lead type
"V" LPCC (lead plastic chip carrier) J lead type

ÌõÃí: ¶ñÂÎŪ¤Ê¥Ñ¥Ã¥±¡¼¥¸·Á¾õ¤Ë¤Ä¤¤¤Æ¤Î¾ðÊó¤Ï http://www.national.com/packaging/plastic.html ¤ò»²¾È ¤·¤Æ¤¯¤À¤µ¤¤.

g ¤ÏÀ½ÉÊ¥°¥ì¡¼¥É¤Î¥Õ¥£¡¼¥ë¥É¤Ç¤¹. ¤â¤·¥Ñ¥Ã¥±¡¼¥¸¥¿¥¤ ¥×¤Îʸ»ú¤ÎÁ°¤ËI¤¬¤¢¤ì¤Ð, ``¹©¶ÈÍÑ''¥°¥ì¡¼¥ÉÉôÉʤòɽ¤·, ɸ½à ÉôÉʤè¤ê¹â¤¤¥¹¥Ú¥Ã¥¯¤ò»ý¤Á¤Þ¤¹¤¬, Miltary »ÅÍÍ (Milspec) ¤Û¤É¹â ¤¯¤Ï¤¢¤ê¤Þ¤»¤ó. ¤³¤ì¤ÏÉÕ²ÃŪ¤Ê¥Õ¥£¡¼¥ë¥É¤Ç¤¹.

»ä¤¿¤Á¤¬¤«¤Ä¤Æ NS16550AFN (DIP ¥Ñ¥Ã¥±¡¼¥¸) ¤È¸Æ¤ó¤Ç¤¤¤¿¤â¤Î¤Ï, ¸½ºß ¤Ï PC16550DN ¤Þ¤¿¤Ï PC16550DIN ¤È¸Æ¤Ð¤ì¤Æ¤¤¤Þ¤¹.

¾¤Î¥Ù¥ó¥À¤ÈÎà»÷¤Î UART

Ĺǯ¤ËÅϤê, 8250, 8250A, 16450 ¤½¤·¤Æ 16550 ¤Ï¥é¥¤¥»¥ó¥¹¤µ¤ì, ¤Þ¤¿¤Ï¾¤Î¥Á¥Ã¥×¥Ù¥ó¥À¤Ë¥³¥Ô¡¼¤µ¤ì¤Æ¤­¤Þ¤·¤¿. 8250, 8250A ¤½¤·¤Æ 16450 ¤Î¾ì¹ç¤Ï, ¤½¤Î¤â¤Î¤Î²óÏ© (``megacell'': LSI¤ÎÃæ¤ËÁȤ߹þ¤à ¤³¤È¤Î¤Ç¤­¤ë¥é¥¤¥Ö¥é¥ê²½¤µ¤ì¤¿²óÏ©¤ÎÂ絬ÌϤÊʪ) ¤¬ Western Digital ¤È Intel ¤ò´Þ¤à¤¿¤¯¤µ¤ó¤Î¥Ù¥ó¥À¤Ë¥é¥¤¥»¥ó¥¹¤µ¤ì¤Þ¤· ¤¿. ¾¤Î¥Ù¥ó¥À¤ÏÉôÉʤò ¥ê¥Ð¡¼¥¹¥¨¥ó¥¸¥Ë¥¢¥ê¥ó¥°¤·¤¿Êª¤«Æ±¤¸¤è¤¦¤Ë ưºî¤¹¤ë¸ß´¹ÉʤòÀ½Â¤¤·¤Þ¤·¤¿.

Æâ¢¥â¥Ç¥à¤Ë¤ª¤¤¤Æ¤Ï, ¥â¥Ç¥àÀ߷׼Ԥϥâ¥Ç¥à¤Î¥Þ¥¤¥¯¥í¥×¥í¥»¥Ã¥µ¤Ç 8250A/16450 ¤ò¥¨¥ß¥å¥ì¡¼¥È¤¹¤ë¤³¤È¤Ï¤è¤¯¤ª¤³¤Ê¤ï¤ì¤Þ¤¹. ¤³¤Î¥¨¥ß¥å¥ì¡¼¥È ¤Ë¤è¤ë (¸ß´¹¤Î) UART ¤Ï¿ôÉ´¥Ð¥¤¥È¤Î±£¤ì¤¿¥Ð¥Ã¥Õ¥¡¤ò»ý¤Ä¤Ç¤·¤ç¤¦. ¥Ð¥Ã¥Õ¥¡¤Î¥µ¥¤¥º¤Î¤¿¤á, ¤³¤Î¤è¤¦¤Ê¸ß´¹ÉʤϹ⮥ǡ¼¥¿½èÍý¤ÎǽÎÏ¤Ç¤Ï 16550A ¤ÈÊѤï¤é¤Ê¤¤¿®ÍêÀ­¤ò»ý¤Ä¤³¤È¤¬¤Ç¤­¤Þ¤¹. ¤·¤«¤·, ¤½¤ì¤Ç¤â ¤Û¤È¤ó¤É¤Î¥ª¥Ú¥ì¡¼¥Æ¥£¥ó¥°¥·¥¹¥Æ¥à¤Ï UART ¤Ï 8250A ¤« 16450 ¤Ç¤¢¤ë ¤ÈÊó¹ð¤·, ÆÃ¼ì¤Ê¥É¥é¥¤¥Ð¤¬»ÈÍѤµ¤ì¤Ê¤±¤ì¤Ð ¥¨¥ß¥å¥ì¡¼¥È¤Ë¤è¤ë UART ¤Î;ʬ¤Ë¸ºß¤¹¤ë ¥Ð¥Ã¥Õ¥¡¥ê¥ó¥°¤Î¸ú²ÌŪ¤Ê»ÈÍѤϤª¤³¤Ê¤¤¤Þ¤»¤ó.

´ö¤Ä¤«¤Î¥â¥Ç¥à¥á¡¼¥«¡¼¤Ï, »Ô¾ì¤Ë¤ª¤±¤ë¶¥Áè¤òÍ­Íø¤Ë¤¹¤ë¤¿¤á¤Ë¿ôÉ´¥Ð ¥¤¥È¤Î¥Ð¥Ã¥Õ¥¡¤ò»ý¤Á 16550A ¤ÎÃÖ¤­´¹¤¨¤¬¤Ç¤­¤ë¤Ï¤º¤ÎÀ߷פò, ¤¿¤È¤¨ À­Ç½¤¬Äã²¼¤¹¤ë»ö¤Ë¤Ê¤Ã¤¿¤È¤·¤Æ¤â ´þ¤Æ¤¶¤ë¤òÆÀ¤Ê¤¯¤Ê¤ë¤è¤¦¤Ê»Ô¾ì¤Î°µ ÎϤò¼õ¤±¤Æ¤¤¤Þ¤¹.

°ìÈÌŪ¤Ë¤¢¤ë¸í²ò¤Ï, ``16550A'' ¤È½ñ¤«¤ì¤¿¤¹¤Ù¤Æ¤ÎÉôÉʤ¬Æ±¤¸À­Ç½¤Ç¤¢¤ë¤È ¤¤¤¦¤³¤È¤Ç¤¹. ¤½¤ì¤é¤Ï°Û¤Ê¤ë¤â¤Î¤Ç¤¢¤ê, ¾õ¶·¤Ë¤è¤Ã¤Æ¤Ï¤Þ¤Á¤¬¤¤¤Ê¤¯ ·ç´Ù¤È¸Æ¤Ù¤ë¤â¤Î¤¬¤³¤ì¤é¤Î 16550A ¥¯¥í¡¼¥ó¤Î¤Û¤È¤ó¤É¤Ë¤¢¤ê¤Þ¤¹.

NS16550 ¤¬³«È¯¤µ¤ì¤¿»þ¤Ë, ¥Ê¥·¥ç¥Ê¥ë¡¦¥»¥ß¥³¥ó¥À¥¯¥¿¤ÏÀ߷פ˴ؤ¹¤ë ´ö¤Ä¤«¤ÎÆÃµö¤ò¼èÆÀ¤·, Èà¤é¤Ï¥é¥¤¥»¥ó¥¹¤òÀ©¸Â¤·¤ÆÂ¾¤Î¥Ù¥ó¥À¤¬Îà»÷ ¤ÎÆÃħ¤ò»ý¤Ä¥Á¥Ã¥×¤ò¶¡µë¤¹¤ë¤³¤È¤òº¤Æñ¤Ë¤·¤Þ¤·¤¿. ÆÃµö¤Î¤¿¤á, ¥ê¥Ð¡¼ ¥¹¥¨¥ó¥¸¥Ë¥¢¥ê¥ó¥°¤Ë¤è¤ëÀ߷פȥ¨¥ß¥å¥ì¡¼¥·¥ç¥ó¤Ï, ÆÃµö¤¬¥«¥Ð¡¼¤¹¤ë ÀÁµá¸¢¤ò¿¯³²¤ò²óÈò¤·¤Ê¤¯¤Æ¤Ï¤Ê¤ê¤Þ¤»¤ó¤Ç¤·¤¿. ·ë²Ì¤È¤·¤Æ, ¤³¤ì¤é¤Î ¥³¥Ô¡¼¤Î¤Û¤È¤ó¤É¤Ï, ¿¤¯¤Î¥³¥ó¥Ô¥å¡¼¥¿¤È¥â¥Ç¥à¤Î¥á¡¼¥«¡¼¤Ï»Ùʧ¤¤¤¿ ¤¯¤Ï¤Ê¤¤Äø¤Î²Á³Ê¤Ç¤¢¤Ã¤¿ËÜʪ¤ÎÉôÉʤΠNS16550A ¤Þ¤¿¤Ï PC16550D ¤È¤Þ¤Ã¤¿ ¤¯Æ±¤¸¤è¤¦¤Êưºî¤ò¤µ¤»¤ë¤³¤È¤Ï¤Ç¤­¤Þ¤»¤ó¤Ç¤·¤¿.

16550A ¤Î¥¯¥í¡¼¥ó¤Ë¸ºß¤¹¤ëÁê°ãÅÀ¤Î¤¦¤Á ¤¤¤¯¤Ä¤«¤Ïº³ºÙ¤Ê¤â¤Î¤Ç¤¹¤¬, ¤½¤Î¤Û¤«¤Ë ÆÃÄê¤Î¥ª¥Ú¥ì¡¼¥Æ¥£¥ó¥°¥·¥¹¥Æ¥à¤ä¥É¥é¥¤¥Ð¤Ç¤Ï Á´Á³»È¤¤¤â¤Î¤Ë¤Ê¤é¤Ê¤¤¤è¤¦¤ÊÁê°ã¤¬Â¸ºß¤¹¤ë¾ì¹ç¤â¤¢¤ê¤Þ¤¹. ¤¢¤ë¥É¥é¥¤¥Ð¤Ç¤ÏÌäÂê¤Ê¤¯Æ°ºî¤·¤Æ¤â, Ê̤Υɥ饤¥Ð¤ò»ÈÍѤ·¤¿¾ì¹ç¤Ë¤Ï ÌäÂ꤬ȯÀ¸¤¹¤ë¤³¤È¤â¤¢¤ê¤Þ¤¹¤·, Windows ¤Î¥É¥é¥¤¥Ð¤Ë¤ª¤¤¤Æ¤â ½¼Ê¬¤Ë¥Æ¥¹¥È¤ä¹Í褬¤ª¤³¤Ê¤ï¤ì¤Ê¤«¤Ã¤¿¥¤¥Ù¥ó¥È¤ÎÁȹç¤ï¤»¤¬ µ¯¤³¤Ã¤¿¾ì¹ç¤Ë¤Ï, ¤³¤ì¤é¤ÎÁê°ãÅÀ¤¬ÌÀ¤é¤«¤Ë¤Ê¤ë¤«¤â¤·¤ì¤Þ¤»¤ó. ¤³¤ì¤Ï¤Û¤È¤ó¤É¤Î¥â¥Ç¥à¥Ù¥ó¥À¤È 16550 ¥¯¥í¡¼¥ó¥á¡¼¥«¡¼¤¬, NS16550A ¤È¤Î¸ß´¹À­¤Î¥×¥é¥¤¥Þ¥ê¥Æ¥¹¥È¤È¤·¤Æ Windows for Workgroups 3.11 ¤È Microsoft MSD ¥æ¡¼¥Æ¥£¥ê¥Æ¥£¤Î Microsoft ¥É¥é¥¤¥Ð¤ò»ÈÍѤ·¤Æ¤¤¤ë¤« ¤é¤Ç¤¹. ¤³¤Î°Â°×²á¤®¤ëµ¬½à¤Ï, ¤â¤·°Û¤Ê¤ë¥ª¥Ú¥ì¡¼¥Æ¥£¥ó¥°¥·¥¹¥Æ¥à¤¬ »ÈÍѤµ¤ì¤¿¤é¥¯¥í¡¼¥ó¤È ËÜʪ¤ÎÉôÉʤÎÈù̯¤Ê°ã¤¤¤Î¤¿¤á¤ËÌäÂ꤬ȯÀ¸¤·ÆÀ ¤ë, ¤È¤¤¤¦¤³¤È¤ò°ÕÌ£¤·¤Æ¤¤¤Þ¤¹.

¥Ê¥·¥ç¥Ê¥ë¡¦¥»¥ß¥³¥ó¥À¥¯¥¿¤Ï, ¤É¤ó¤Ê OS ¤Î¥É¥é¥¤¥Ð¤«¤é¤âÆÈΩ¤·¤¿¸ß ´¹À­¥Æ¥¹¥È¤ò¼Â¹Ô¤¹¤ë COMTEST ¤È¤¤¤¦Ì¾Á°¤ÎÆþ¼ê²Äǽ¤Ê¥×¥í¥°¥é¥à¤òºî À®¤·¤Þ¤·¤¿. ¤³¤Î¥¿¥¤¥×¤Î¥×¥í¥°¥é¥à¤ÎÌÜŪ¤Ï, ¶¥¹çÀ½Éʤˤ¢¤ë·ç´Ù¤Î¥Ç ¥â¥ó¥¹¥È¥ì¡¼¥·¥ç¥ó¤Ç¤¢¤ë¤³¤È¤ò¤ª¤Ü¤¨¤Æ¤ª¤¯¤Ù¤­¤Ç¤¹. ¤Ç¤¹¤«¤é¤½¤Î¥× ¥í¥°¥é¥à¤Ï, ¥Æ¥¹¥ÈÃæ¤ÎÉôÉÊ¤ÎÆ°ºî¤Î½ÅÍפÊÌäÂê¤È¶Ë¤á¤Æ¤µ¤µ¤¤¤ÊÁê°ã¤ò Ʊ¤¸¤è¤¦¤ËÊó¹ð¤¹¤ë¤Ç¤·¤ç¤¦.

¤³¤Îʸ½ñ¤ÎÃø¼Ô¤¬ 1994 ǯ¤Ë¼Â¹Ô¤·¤¿°ìÏ¢¤Î¥Æ¥¹¥È¤Ç¤Ï, ¥Ê¥·¥ç¥Ê¥ë¥»¥ß ¥³¥ó¥À¥¯¥¿, TI, StarTech ¤½¤·¤Æ CMD ¤¬À½Â¤¤·¤¿ÉôÉÊ¤Ï megacell µÚ¤Ó COMTEST ¤Ç¥Æ¥¹¥È¤µ¤ì¤¿Æâ¢¥â¥Ç¥à¤ËËä¤á¹þ¤Þ¤ì¤¿¥¨¥ß¥å¥ì¡¼¥·¥ç¥ó¤ÈƱ Åù¤Ç¤¹. ¤³¤ì¤é¤ÎÉôÉʤΤδö¤Ä¤«¤ÇÃíÌܤµ¤ì¤ëÁê°ãÅÀ¤ò°Ê²¼¤Ë¼¨¤·¤Þ¤¹. ¤³¤ì¤é¤Î¥Æ¥¹¥È¤Ï1994ǯ¤Ë¼Â¹Ô¤µ¤ì¤¿¤Î¤Ç, ¤³¤ì¤é¤Ï¥Ù¥ó¥À¤«¤é¶¡µë¤µ ¤ì¤¿À½Éʤθ½ºß¤ÎÀ­Ç½¤Ë¤ÏÈ¿±Ç¤µ¤ì¤Ê¤¤¤Ç¤·¤ç¤¦.

¶Ëü¤Ë¿¤¯¤ÎÌäÂê¤ä¤¢¤ë¥¿¥¤¥×¤ÎÌäÂ꤬¸¡½Ð¤µ¤ì¤¿¾ì¹ç¤Ë, COMTEST ¤ÏÄÌ ¾ï¤Ï¼Â¹Ô¤òÃæ»ß¤¹¤ë¤³¤È¤ËÃí°Õ¤·¤Æ¤¯¤À¤µ¤¤. ¤³¤Î¥Æ¥¹¥È¤Î°ìÉô¤Ç¤Ï, ¤¿¤È ¤¨²¿²óÁê°ãÅÀ¤ËÁø¶ø¤·¤Æ¤âÃæ»ß¤·¤Ê¤¤¤è¤¦¤Ë COMTEST ¤ò½¤Àµ¤·¤Þ¤·¤¿.

¥Ù¥ó¥À ÉôÉÊÈÖ¹æ Êó¹ð¤µ¤ì¤¿¡ÖÁê°ãÅÀ¡×¤È¤·¤ÆÃΤé¤ì¤ë¥¨¥é¡¼
National (PC16550DV) 0
National (NS16550AFN) 0
National (NS16C552V) 0
TI (TL16550AFN) 3
CMD (16C550PE) 19
StarTech (ST16C550J) 23
Rockwell Reference modem with internal 16550 or an emulation (RC144DPi/C3000-25) 117
Sierra Modem with an internal 16550 (SC11951/SC11351) 91

Note: ¤³¤Îʸ½ñ¤ÎÃø¼Ô¤Ïº£¤Þ¤Ç, COMTEST ¥×¥í¥°¥é¥à¤ò »ÈÍѤ·¤ÆÁê°ãÅÀ¤¬¥¼¥í¤ÈÊó¹ð¤µ¤ì¤ë¥Ê¥·¥ç¥Ê¥ë¡¦ ¥»¥ß¥³¥ó¥À¥¯¥¿°Ê³°¤ÎÉôÉʤò°ì¤Ä¤âȯ¸«¤·¤Þ¤»¤ó¤Ç¤·¤¿. ¥Ê¥·¥ç¥Ê¥ë¡¦¥»¥ß¥³¥ó¥À¥¯¥¿¤ÏĹǯ¤ËÅϤê 16550 ¤Î¸Þ¤Ä¤Î¥Ð¡¼¥¸¥ç¥ó¤ò»ý¤Ã¤Æ¤ª¤ê, ºÇ¿·¤ÎÉôÉÊ¤Ï µ¡Ç½À­¤Î¤¿¤á¤Ë, ¥Ù¥ó¥Á¥Þ¡¼¥¯¤ò¹Íθ¤·¤¿¸Å¤¤ NS16550AFN ¤È¾¯¤·°Û¤Ê¤ë¿¶¤ëÉñ¤¤¤ò¤¹¤ë¤³¤È¤Ë Ãí°Õ¤¹¤ë¤Ù¤­¤Ç¤¹. COMTEST ¤Ï¥Ê¥·¥ç¥Ê¥ë¡¦¥»¥ß¥³¥ó¥À¥¯¥¿¤ÎÀ½Éʥ饤¥ó¤Î Áê°ãÅÀ¤Ë¤Ä¤¤¤Æ¤Ï¸«¤Æ¸«¤Ì¤Õ¤ê¤ò¤¹¤ë¤è¤¦¤Ë¤Ê¤ê, ÉôÉʤΥê¥Ó¥¸¥ç¥ó A, B ¤½¤·¤Æ C ¤Ë¤¢¤ë¥Ð¥°¤¬ µ­½Ò¤µ¤ì¤Æ¤¤¤ë¸ø¼°¤ÊÀµ¸íɽ¤¬¤¢¤ë»þ¤Ç¤â, (¥ª¥ê¥¸¥Ê¥ë¤Î 16550 ¤ò½ü¤¤¤Æ¤Ï) ¥Ê¥·¥ç¥Ê¥ë¡¦ ¥»¥ß¥³¥ó¥À¥¯¥¿¤ÎÉôÉʤˤĤ¤¤Æ¥¨¥é¡¼¤ò Êó¹ð¤·¤Ê¤¯¤Ê¤Ã¤¿¤Î¤Ç, ¤³¤Î COMTEST ¤Î¤Ò¤¤¤­¤ò ¹Íθ¤Ë¤¤¤ì¤ë¤Ù¤­¤Ç¤¹.

COMTEST ¤«¤é¤ÎÁê°ãÅÀ¤Îñ½ã¤Ê¥«¥¦¥ó¥È¤¬, ²¿¤ÎÁê°ãÅÀ¤¬½ÅÍפǤ¢¤ê ¤É¤ì¤¬¤½¤¦¤Ç¤Ê¤¤¤Î¤«¤Ë¤Ä¤¤¤Æ ¿¤¯¤òÌÀ¤é¤«¤Ë¤·¤Ê¤¤¤³¤È¤ò Íý²ò¤¹¤ë¤³¤È ¤¬ÂçÀڤǤ¹. Î㤨¤Ð, Æâ¢¤Î UART ¤ò»ý¤Ä¾åµ­¤ÎÆó¤Ä¤Î¥â¥Ç¥à¤ÇÊó¹ð¤µ¤ì ¤¿Áê°ãÅÀ¤ÎÌóȾʬ¤¬, 5µÚ¤Ó6¥Ó¥Ã¥È¥­¥ã¥é¥¯¥¿¥â¡¼¥É¤ò¥µ¥Ý¡¼¥È¤·¤Ê¤¤¥¯ ¥í¡¼¥ó¤Î UART ¤Ë¤è¤Ã¤Æ°ú¤­µ¯¤³¤µ¤ì¤Þ¤·¤¿. ËÜʪ¤Î 16550, 16450 ¤½¤· ¤Æ 8250 UART ¤¹¤Ù¤Æ¤Ï¤³¤ì¤é¤Î¥â¡¼¥É¤ò¥µ¥Ý¡¼¥È¤·, COMTEST ¤Ï¤³¤ì¤é¤Î ¥â¡¼¥É¤Îµ¡Ç½À­¤ò¥Á¥§¥Ã¥¯¤¹¤ë¤Î¤Ç, 50¤ò±Û¤¨¤ëÁê°ãÅÀ¤¬Êó¹ð¤µ¤ì¤Þ¤·¤¿. ¤·¤«¤·, 5µÚ¤Ó6¥Ó¥Ã¥È¥­¥ã¥é¥¯¥¿¥â¡¼¥É¤ò ¥µ¥Ý¡¼¥È¤¹¤ë¥â¥Ç¥à¤ÏËØ¤É¤Ê¤¯, ÆÃ¤Ë¤Ë¤³¤ì¤é¤Ï¥¨¥é¡¼½¤Àµ¤È°µ½Ìµ¡Ç½ÉդΤâ¤Î¤Ç¤¹. ¤³¤ì¤Ï5µÚ¤Ó6¥Ó¥Ã¥È ¥­¥ã¥é¥¯¥¿¥â¡¼¥É¤Ë´ØÏ¢¤·¤¿Áê°ãÅÀ¤Ï º¹¤·°ú¤¤¤Æ¹Í¤¨¤ë¤³¤È¤¬¤Ç¤­¤ë¤³¤È ¤ò°ÕÌ£¤·¤Æ¤¤¤Þ¤¹.

COMTEST ¤¬Êó¹ð¤·¤¿Áê°ãÅÀ¤Î¿¤¯¤Ï, ¥¿¥¤¥ß¥ó¥°¤Ë´Ø¤¹¤ëÅÀ¤Ç¤·¤ç¤¦. ¿¤¯¤Î¥¯¥í¡¼¥ó¤ÎÀ߷פǤÏ, ¥Û¥¹¥È¤¬°ì¤Ä¤Î¥Ý¡¼¥È¤«¤éÆÉ¤ß¹þ¤ó¤À»þ¤Ë¾ ¤Î¤¢¤ë¥Ý¡¼¥È¤Î¥¹¥Æ¡¼¥¿¥¹¥Ó¥Ã¥È¤Ï, ËÜÅö¤Î NS16550AFN ¤ÈƱ¤¸ Ťµ¤Î»þ´ÖÆâ¤Ç¹¹¿·¤µ¤ì¤Ê¤¤ (¤¢¤ë¤â¤Î¤Ï®¤¯, ¤¢¤ë¤â¤Î¤ÏÃÙ¤¯) ¤«¤â¤·¤ì ¤Þ¤»¤ó¤¬, COMTEST ¤Ï¤³¤ì¤é¤ÎÁê°ãÅÀ¤òõ¤·¤Þ¤¹. ¤³¤ì¤ÏÁê°ãÅÀ¤Î¿ô¤Ï¸í ²ò¤ò¾·¤­°×¤¤¤â¤Î¤Ç¤¹. ¤¢¤ë¥Ç¥Ð¥¤¥¹¤Ë¤Ï°ì¤Ä¤«Æó¤Ä¤ÎÁê°ãÅÀ¤·¤«¤¢¤ê¤Þ ¤»¤ó¤¬¤½¤ì¤é¤ÏÈó¾ï¤Ë½ÅÂ礫¤â¤·¤ì¤Þ¤»¤ó. ¤Þ¤¿Ê̤ΥǥХ¤¥¹¤Ï´ð½àÉôÉÊ ¤ÈÈæ¤Ù¤ÆÂ®¤¯¤Þ¤¿¤ÏÃÙ¤¯ status ¥ì¥¸¥¹¥¿¤ò¹¹¿·¤¹¤ë¤¿¤á¤Ë (ŬÀڤ˽ñ¤« ¤ì¤¿¥É¥é¥¤¥Ð¤ÎÁàºî¤Ë¤Ï¤Þ¤Ã¤¿¤¯±Æ¶Á¤·¤Ê¤¤¤«¤â¤·¤ì¤Þ¤»¤ó) ¿¤¯¤ÎÁê°ãÅÀ¤ò Êó¹ð¤µ¤ì¤ë¤«¤â¤·¤ì¤Þ¤»¤ó.

COMTEST ¤ÏÌäÂê¤ò°ú¤­µ¯¤³¤¹¤«¤âÃΤì¤Ê¤¤, ¤Þ¤¿¤ÏÆÃ¼ì¤Ê¥±¡¼¥¹¤È¤·¤Æ½è Íý¤·¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤ÀøºßŪ¤ËÌ·½â¤·¤¿ÉôÉʤθºß¤ËÂФ·¤Æ, ´ÉÍý¼Ô¤Ë·Ù ¹ð¤ò½Ð¤¹¥¹¥¯¥ê¡¼¥Ë¥ó¥°¥Ä¡¼¥ë¤È¤·¤Æ»ÈÍѤǤ­¤Þ¤¹.

¤â¤·¥â¥Ç¥à¤ÎÃæ¤Ë¤¢¤ë 16550 ¤ä¥·¥ê¥¢¥ë¥Ý¡¼¥ÈÀܳ¤µ¤ì¤Æ¤¤¤ë¥â¥Ç¥à¤Ë ÂФ·¤Æ COMTEST ¤ò¼Â¹Ô¤¹¤ë¾ì¹ç, ¥â¥Ç¥à¤¬¥Æ¥¹¥È¥­¥ã¥é¥¯¥¿¤ò¥¨¥³¡¼¤· ¤Ê¤¤¤è¤¦¤ËºÇ½é¤Ë ATE0&W ¥³¥Þ¥ó¥É¤ò¥â¥Ç¥à¤Ëȯ¹Ô¤¹¤ëɬÍפ¬¤¢¤ê¤Þ ¤¹. ¤³¤ì¤ò¤ª¤³¤Ê¤¦¤³¤È¤ò˺¤ì¤¿¾ì¹ç, COMTEST ¤Ï¾¯¤Ê¤¯¤È¤â¤³¤ÎÁê°ãÅÀ¤ò Êó¹ð¤¹¤ë¤Ç¤·¤ç¤¦:

Error (6)...Timeout interrupt failed: IIR = c1  LSR = 61

8250/16450/16550 ¤Î¥ì¥¸¥¹¥¿

8250/16450/16550 UART ¤ÏȬ¤Ä¤ÎϢ³¤¹¤ë I/O ¥Ý¡¼¥È¥¢¥É¥ì¥¹¤òͽÌó ¤·¤Æ¤¤¤Þ¤¹. IBM PC ¤Ç¤Ï¤³¤ì¤é¤ÎȬ¤Ä¤Î¥Ý¡¼¥È¤ËÂФ·¤ÆÆó¤Ä¤ÎÄêµÁ¤µ¤ì¤¿ °ÌÃÖ¤¬¤¢¤ê, ¤½¤ì¤é¤Ï½¸¹çŪ¤Ë COM1 ¤È COM2 ¤È¤·¤ÆÃΤé¤ì¤Æ¤¤¤Þ¤¹. PC ¥¯¥í¡¼¥ó¤È¥¢¥É¥ª¥ó¥«¡¼¥É¤Î¥á¡¼¥«¡¼¤Ï COM3 ¤È COM4 ¤È¤·¤ÆÃΤé¤ì¤ëÆó¤Ä ¤ÎÉÕ²ÃŪ¤ÊÎΰè¤òºîÀ®¤·¤Þ¤·¤¿¤¬, ´ö¤Ä¤«¤Î¥·¥¹¥Æ¥à¤Ç¤Ï¤³¤ì¤é¤Î;ʬ¤Ê COM ¥Ý¡¼¥È¤Ï¾¤Î¥Ï¡¼¥É¥¦¥§¥¢¤È¾×ÆÍ¤·¤Þ¤¹. ºÇ¤â¤è¤¯µ¯¤­¤ë¤â¤Î¤Ï IBM 8514 ¥¨¥ß¥å¥ì¡¼¥·¥ç¥ó¤òÄ󶡤¹¤ë¥Ó¥Ç¥ª¥¢¥À¥×¥¿¤È¤Î¾×ÆÍ¤Ç¤¹.

COM1 ¤Ë¤Ï 0x3f8 ¤«¤é 0x3ff ¤¬³ä¤êÅö¤Æ¤é¤ì, Ä̾ï IRQ 4 ¤¬»ÈÍѤµ¤ì¤Þ¤¹. COM2 ¤Ë¤Ï 0x2f8 ¤«¤é 0x2ff ¤¬³ä¤êÅö¤Æ¤é¤ì, Ä̾ï IRQ 3 ¤¬»ÈÍѤµ¤ì¤Þ¤¹. COM3 ¤Ë¤Ï 0x3e8 ¤«¤é 0x3ef ¤¬³ä¤êÅö¤Æ¤é¤ì, IRQ ¤Ïɸ½à²½¤µ¤ì¤Æ¤¤¤Þ¤»¤ó. COM4 ¤Ë¤Ï 0x2e8 ¤«¤é 0x2ef ¤¬³ä¤êÅö¤Æ¤é¤ì, IRQ ¤Ïɸ½à²½¤µ¤ì¤Æ¤¤¤Þ¤»¤ó.

8250/16450/16550 UART ¤ÎI/O¥Ý¡¼¥È¤Î¾ÜºÙ¤Ï°Ê²¼¤ËÄ󶡤µ¤ì¤Æ¤¤¤Þ¤¹.

I/O ¥Ý¡¼¥È µö²Ä¤µ¤ì¤¿¥¢¥¯¥»¥¹ ÀâÌÀ
+0x00 write (DLAB==0)

Transmit Holding Register (THR).

¤³¤Î¥Ý¡¼¥È¤Ë½ñ¤­¹þ¤Þ¤ì¤¿¾ðÊó¤Ï ¥Ç¡¼¥¿Ì¿Îá¤È¤·¤Æ ½èÍý¤µ¤ì, UART ¤Ë¤è¤êÁ÷¿®¤µ¤ì¤Þ¤¹.

+0x00 read (DLAB==0)

Receive Buffer Register (RBR).

¥·¥ê¥¢¥ëÀܳ¤«¤é UART ¤Ë¤è¤Ã¤Æ¼õ¿®¤µ¤ì¤¿¤¹¤Ù¤Æ¤Î ¥Ç¡¼¥¿Ì¿Îá¤Ï, ¤³¤Î¥Ý¡¼¥È¤òÆÉ¤à¤³¤È¤Ë¤è¤Ã¤Æ¥Û¥¹ ¥È¤Ë¤è¤ê¥¢¥¯¥»¥¹¤µ¤ì¤Þ¤¹.

+0x00 write/read (DLAB==1)

Divisor Latch LSB (DLL)

¥Þ¥¹¥¿ÆþÎÏ¥¯¥í¥Ã¥¯¤Î¼þÇÈ¿ô¤ò ¤³¤Î¥ì¥¸¥¹¥¿¤ËÆþ¤Ã ¤Æ¤¤¤ëÃͤdzä¤ë¤³¤È¤Ë¤è¤ê, UART ¤Î¼þÇÈ¿ô¤¬·èÄê ¤µ¤ì¤Þ¤¹ (IBM PC¤Ç¤Ï, ¥Þ¥¹¥¿¥¯¥í¥Ã¥¯¤Î¼þÇÈ¿ô¤Ï 1.8432MHz¤Ç¤¹). ¤³¤Î¥ì¥¸¥¹¥¿¤Ë¤Ï¾åµ­¤Î½ü¿ô¤Î²¼ °Ì8¥Ó¥Ã¥È¤¬Æþ¤Ã¤Æ¤¤¤Þ¤¹.

+0x01 write/read (DLAB==1)

Divisor Latch MSB (DLH)

¥Þ¥¹¥¿ÆþÎÏ¥¯¥í¥Ã¥¯¤Î¼þÇÈ¿ô¤ò¤³¤Î ¥ì¥¸¥¹¥¿¤ËÆþ¤Ã ¤Æ¤¤¤ëÃͤdzä¤ë¤³¤È¤Ë¤è¤ê, UART ¤Î¼þÇÈ¿ô¤¬·èÄê ¤µ¤ì¤Þ¤¹ (IBM PC¤Ç¤Ï, ¥Þ¥¹¥¿¥¯¥í¥Ã¥¯¤Î¼þÇÈ¿ô¤Ï 1.8432MHz¤Ç¤¹). ¤³¤Î¥ì¥¸¥¹¥¿¤Ë¤Ï¾åµ­¤Î½ü¿ô¤Î¾å °Ì8¥Ó¥Ã¥È¤¬Æþ¤Ã¤Æ¤¤¤Þ¤¹.

+0x01 write/read (DLAB==0)

Interrupt Enable Register (IER)

8250/16450/16550 ¤Î UART ¤Ï¥¤¥Ù¥ó¥È¤ò»Í¤Ä¤Î¥«¥Æ ¥´¥ê¤Î°ì¤Ä¤ËʬÎष¤Þ¤¹. ¤½¤ì¤¾¤ì¤Î¥«¥Æ¥´¥ê¤ÏÀß Äê²Äǽ¤Ç¤¹. ¤½¤ì¤¾¤ì¤Î¥«¥Æ¥´¥ê¤Ï, ¤É¤ó¤ÊÎà¤Î¥¤ ¥Ù¥ó¥È¤ÎȯÀ¸»þ¤Ë³ä¤ê¹þ¤ß¤ò À¸À®¤¹¤ë¤è¤¦¤ËÀßÄê²Ä ǽ¤Ç¤¹. 8250/16450/16550 ¤Î UART ¤Ï, Í­¸ú¤Ë¤Ê¤Ã ¤Æ¤¤¤ë¥«¥Æ¥´¥êÆâ¤Ç¤¤¤¯¤Ä¤Î ¥¤¥Ù¥ó¥È¤¬È¯À¸¤·¤Æ¤¤ ¤ë¤«¤Ë´Ø¤ï¤é¤º, ñ°ì¤Î³°Éô³ä¤ê¹þ¤ß¥·¥°¥Ê¥ë¤òÀ¸ À®¤·¤Þ¤¹. ³ä¤ê¹þ¤ß¤Ë±þÅú¤·Í­¸ú¤Ë¤Ê¤Ã¤Æ¤¤¤ë³ä¤ê ¹þ¤ß¥«¥Æ¥´¥ê (Ä̾魯¤Ù¤Æ¤Î¥«¥Æ¥´¥ê¤¬Í­¸ú¤Ë¤Ê¤Ã¤Æ ¤¤¤ë³ä¤ê¹þ¤ß¤ò»ý¤Á¤Þ¤¹) ¤ò³ä¤ê¹þ¤ß¤ÎËÜÅö¤Î¸¶°ø ¤ò·èÄꤹ¤ë¤¿¤á¤Ë¥Ý¡¼¥ê¥ó¥°¤¹¤ë¤«¤Ï, ¥Û¥¹¥È¤Î¥× ¥í¥»¥Ã¥µ¼¡Âè¤Ç¤¹.

Bit 7 ͽÌóºÑ¤ß, ¾ï¤Ë 0.
Bit 6 ͽÌóºÑ¤ß, ¾ï¤Ë 0.
Bit 5 ͽÌóºÑ¤ß, ¾ï¤Ë 0.
Bit 4 ͽÌóºÑ¤ß, ¾ï¤Ë 0.
Bit 3 Enable Modem Status Interrupt (EDSSI). ¤³¤Î¥Ó¥Ã¥È¤ò¡Ö1¡×¤ËÀßÄꤹ¤ë¤³¤È¤Ç, °ì¤Ä°Ê¾å¤Î¾õÂ֥饤¥ó¤ÇÊѹ¹¤¬È¯À¸¤·¤¿»þ ¤Ë, UART ¤¬³ä¤ê¹þ¤ß¤òÀ¸À®²Äǽ¤È¤Ê¤ê¤Þ ¤¹.
Bit 2 Enable Receiver Line Status Interrupt (ELSI) ¤³¤Î¥Ó¥Ã¥È¤ò¡Ö1¡×¤ËÀßÄꤹ¤ë¤³¤È¤Ç, Æþ¤Ã ¤Æ¤¯¤ë¥Ç¡¼¥¿¤Ë¥¨¥é¡¼ (¤Þ¤¿¤Ï BREAK ¥· ¥°¥Ê¥ë) ¤¬¸¡ÃΤµ¤ì¤¿»þ¤Ë, UART ¤¬³ä¤ê ¹þ¤ß¤òÀ¸À®¤¹¤ë¤è¤¦¤Ë¤Ê¤ê¤Þ¤¹.
Bit 1 Enable Transmitter Holding Register Empty Interrupt (ETBEI) ¤³¤Î¥Ó¥Ã¥È¤ò¡Ö1¡×¤ËÀßÄꤹ¤ë¤³¤È¤Ç, UART ¤ËÁ÷¿®¤µ¤ì¤ë°ì¤Ä°Ê¾å¤ÎÉÕ²ÃŪ¤Êʸ »ú¤ËÂФ¹¤ë¶õ¤­¤¬À¸¤¸¤¿»þ¤Ë, UART ¤¬³ä ¤ê¹þ¤ß¤òÀ¸À®¤¹¤ë¤è¤¦¤Ë¤Ê¤ê¤Þ¤¹.
Bit 0 Enable Received Data Available Interrupt (ERBFI) ¤³¤Î¥Ó¥Ã¥È¤ò¡Ö1¡×¤ËÀßÄꤹ¤ë¤³¤È¤Ç, UART ¤¬ FIFO ¤Î¥È¥ê¥¬¡¼¥ì¥Ù¥ë¤ò±Û¤¨ ¤ë½½Ê¬¤Êʸ»ú¤ò¼õ¤±¼è¤ë¤«, FIFO ¤Î¥¿¥¤ ¥Þ¤¬´ü¸ÂÀÚ¤ì¤È¤Ê¤ë¤« (¸Å¤¯¤Ê¤Ã¤¿¥Ç¡¼¥¿), FIFO ¤¬Ìµ¸ú¤Î¾ì¹ç¤Ë¥·¥°¥Ê¥ëʸ»ú¤¬¼õ¿® ¤µ¤ì¤¿»þ¤Ë, UART ¤¬³ä¤ê¹þ¤ß¤òÀ¸À®¤¹¤ë ¤è¤¦¤Ë¤Ê¤ê¤Þ¤¹.
+0x02 write
FIFO Control Register (FCR) (¤³¤Î¥Ý¡¼¥È¤Ï 8250 ¤È 16450 ¤Î UART ¤Ç¤Ï ¸ºß¤·¤Þ¤»¤ó.)
Bit 7 Receiver Trigger Bit #1
Bit 6

Receiver Trigger Bit #0

¤³¤ÎÆó¤Ä¤Î¥Ó¥Ã¥È¤Ï FIFO ¤¬µ¡Ç½¤·¤Æ¤¤¤ë ¾ì¹ç¤Ë¥ì¥·¡¼¥Ð¤¬¤É¤Î»þÅÀ¤Ç³ä¤ê¹þ¤ß¤òÀ¸ À®¤¹¤ë¤«¤òÀ©¸æ¤·¤Þ¤¹.

  7 6 ³ä¤ê¹þ¤ßÀ¸À®Á°¤Ë¤¤¤¯¤Ä¤ÎÌ¿Îá ¤¬ ¼õ¿®¤µ¤ì¤¿¤«.
  0 0 1
  0 1 4
  1 0 8
  1 1 14
Bit 5 ͽÌóºÑ¤ß, ¾ï¤Ë 0.
Bit 4 ͽÌóºÑ¤ß, ¾ï¤Ë 0.
Bit 3 DMA Mode Select. Bit 0 ¤¬¡Ö1¡× (FIFO Í­¸ú) ¤ËÀßÄꤵ¤ì¤Æ ¤¤¤ë¾ì¹ç, ¤³¤Î¥Ó¥Ã¥È¤ÎÀßÄê¤Ï -RXRDY ¤È -TXRDY ¤Î½èÍý¤ò Mode 0 ¤«¤é Mode 1 ¤Ø Êѹ¹¤·¤Þ¤¹.
Bit 2 Transmit FIFO Reset. ¤³¤Î¥Ó¥Ã¥È¤Ë¡Ö1¡×¤¬½ñ¤­¹þ¤Þ¤ì¤Æ¤¤¤ë¾ì ¹ç, FIFO ¤ÎÆâÍÆ¤ÏÇË´þ¤µ¤ì¤Þ¤¹. ¸½ºßÁ÷ ¿®¤µ¤ì¤Æ¤¤¤ë¤¹¤Ù¤Æ¤ÎÌ¿Îá¤Ï»¤Ê¤ï¤ì¤º¤ËÁ÷ ¤é¤ì¤ë¤Ç¤·¤ç¤¦. ¤³¤Îµ¡Ç½¤ÏÁ÷¿®Ãæ»ß¤Î¾ì ¹ç¤ËÌò¤ËΩ¤Á¤Þ¤¹.
Bit 1 Receiver FIFO Reset. ¤³¤Î¥Ó¥Ã¥È¤Ë¡Ö1¡×¤¬½ñ¤­¹þ¤Þ¤ì¤Æ¤¤¤ë¾ì ¹ç, FIFO ¤ÎÆâÍÆ¤ÏÇË´þ¤µ¤ì¤Þ¤¹. ¸½ºß shift ¥ì¥¸¥¹¥¿Æâ¤ÇÁȤßΩ¤Æ¤é¤ì¤Æ¤¤¤ë¤¹¤Ù ¤Æ¤ÎÌ¿Îá¤Ï»¤Ê¤ï¤ì¤º¤Ë¼õ¿®¤µ¤ì¤ë¤Ç¤·¤ç ¤¦.
Bit 0 16550 FIFO Enable. ÀßÄꤵ¤ì¤Æ¤¤¤ë¾ì¹ç, Á÷¿® / ¼õ¿®Î¾Êý¤Î FIFO ¤¬Í­¸ú¤Ë¤Ê¤ê¤Þ¤¹. holding ¥ì¥¸¥¹ ¥¿, shift ¥ì¥¸¥¹¥¿¤Þ¤¿¤Ï FIFO Æâ¤Î¤¹¤Ù¤Æ ¤ÎÆâÍÆ¤Ï, FIFO ¤¬Í­¸ú¤Þ¤¿¤Ï̵¸ú¤Ë¤Ê¤Ã ¤¿»þÅÀ¤Ç¼º¤ï¤ì¤Þ¤¹.
+0x02 read
Interrupt Identification Register
Bit 7 FIFOÍ­¸ú. 8250/16450 UART ¤Ç¤Ï, ¤³¤Î¥Ó¥Ã¥È¤Ï¥¼¥í.
Bit 6 FIFOÍ­¸ú. 8250/16450 UART ¤Ç¤Ï, ¤³¤Î¥Ó¥Ã¥È¤Ï¥¼¥í.
Bit 5 ͽÌóºÑ¤ß, ¾ï¤Ë0.
Bit 4 ͽÌóºÑ¤ß, ¾ï¤Ë0.
Bit 3 Interrupt ID Bit #2. 8250/16450 UART ¤Ç¤Ï, ¤³¤Î¥Ó¥Ã¥È¤Ï¥¼¥í.
Bit 2 Interrupt ID Bit #1
Bit 1 Interrupt ID Bit #0. ¤³¤ì¤é¤Î3¤Ä¤Î¥Ó¥Ã¥È¤Ï¿Ê¹ÔÃæ¤Î³ä¤ê¹þ¤ß ¤ò°ú¤­µ¯¤³¤·¤¿¥¤¥Ù¥ó¥È¤Î¥«¥Æ¥´¥ê¤òÊ»¤» ¤ÆÊó¹ð¤·¤Þ¤¹. ¤³¤ì¤é¤Î¥«¥Æ¥´¥ê¤ÏÍ¥ÀèÅÙ ¤ò»ý¤Ä¤¿¤á, ¥¤¥Ù¥ó¥È¤ÎÊ£¿ô¤Î¥«¥Æ¥´¥ê¤¬ Ʊ»þ¤ËȯÀ¸¤·¤¿¾ì¹ç, UART ¤ÏºÇ½é¤ËºÇ¤â ½ÅÍפʥ¤¥Ù¥ó¥È¤òÊó¹ð¤·, ¥Û¥¹¥È¤ÏÊó¹ð¤µ ¤ì¤¿½ç¤Ë²ò·è¤¹¤ë¤Ç¤·¤ç¤¦. ¸½ºß¤Î³ä¤ê¹þ ¤ß¤ò°ú¤­µ¯¤³¤·¤¿¤¹¤Ù¤Æ¤Î¥¤¥Ù¥ó¥È¤Ï, ¿·¤· ¤¤³ä¤ê¹þ¤ß¤¬À¸À®¤µ¤ì¤ëÁ°¤Ë²ò·è¤µ¤ì¤Ê¤± ¤ì¤Ð¤Ê¤ê¤Þ¤»¤ó (¤³¤ì¤Ï PC ¤Î¥¢¡¼¥­¥Æ¥¯ ¥Á¥ã¤ÎÀ©¸Â¤Ç¤¹).
  2 1 0 Í¥ÀèÅÙ ÀâÌÀ
  0 1 1 First ¥ì¥·¡¼¥Ð¥¨¥é¡¼ (OE, PE, BI, ¤Þ¤¿ FE)
  0 1 0 Second Í­¸ú¤Ê¼õ¿®¥Ç¡¼¥¿
  1 1 0 Second ¥È¥ê¥¬¡¼¥ì¥Ù¥ë¼±ÊÌ»Ò (¼õ¿®¥Ð¥Ã¥Õ¥¡Ãæ¤Î¸Å¤¤¥Ç¡¼¥¿)
  0 0 1 Third ¥È¥é¥ó¥¹¥ß¥Ã¥¿¤Ë Ì¿ÎáÍѤζõ¤­¤¬¤¢¤ë (THRE)
  0 0 0 Fourth ¥â¥Ç¥à¤Î¾õÂÖ¤¬ ÊѤï¤Ã¤¿ (-CTS, -DSR, -RI, ¤Þ¤¿¤Ï -DCD)
Bit 0 Interrupt Pending Bit. ¤³¤Î¥Ó¥Ã¥È¤¬¡Ö0¡×¤ËÀßÄꤵ¤ì¤Æ¤¤¤ë¾ì¹ç, ¾¯¤Ê¤¯¤È¤â°ì¤Ä¤Î³ä¤ê¹þ¤ß¤¬¥Ú¥ó¥Ç¥£¥ó¥° ¤µ¤ì¤Æ¤¤¤Þ¤¹.
+0x03 write/read
Line Control Register (LCR)
Bit 7 Divisor Latch Access Bit (DLAB). ÀßÄꤵ¤ì¤Æ¤¤¤ë¾ì¹ç, transmit/receive register (THR/RBR) ¤È Interrupt Enable Register (IER) ¤Ø¤Î¥¢¥¯¥»¥¹¤¬Ìµ¸ú¤Ë¤Ê ¤ê¤Þ¤¹. ¸½ºß¤³¤ì¤é¤Î¥Ý¡¼¥È¤Ø¤Î¤¹¤Ù¤Æ¤Î¥¢ ¥¯¥»¥¹¤Ï Divisor Latch Register ¤Ø¥ê¥À ¥¤¥ì¥¯¥È¤µ¤ì¤Þ¤¹. ¤³¤Î¥Ó¥Ã¥È¤ÎÀßÄê, Divisor Register ¤Î¥í¡¼¥Ç¥£¥ó¥°, ¤½¤· ¤Æ DLAB ¤Î¥¯¥ê¥¢¤Ï³ä¤ê¹þ¤ß¤¬Ìµ¸ú¤Ë¤Ê¤Ã ¤Æ¤¤¤ë¾õÂ֤Ǥª¤³¤Ê¤ï¤ì¤ë¤Ù¤­¤Ç¤¹.
Bit 6 Set Break. ¡Ö1¡×¤ËÀßÄꤵ¤ì¤Æ¤¤¤ë¾ì¹ç, ¥È¥é¥ó¥¹¥ß¥Ã ¥¿¤Ï¤³¤Î¥Ó¥Ã¥È¤¬¡Ö0¡×¤ËÀßÄꤵ¤ì¤ë¤Þ¤Ç ¥¹¥Ú¡¼¥¹¤òÀÚ¤êÌܤʤ¯Á÷¿®¤·¤Þ¤¹. ¤³¤ì¤Ï Á÷¿®¤µ¤ì¤Æ¤¤¤ëʸ»ú¤Î¤¹¤Ù¤Æ¤Î¥Ó¥Ã¥È¤ËÍ¥Àè ¤·¤Þ¤¹.
Bit 5 Stick Parity. parity ¤¬Í­¸ú¤Ë¤Ê¤Ã¤Æ¤¤¤ë¾ì¹ç, ¤³¤Î¥Ó¥Ã ¥È¤ÎÀßÄê¤Ï¥Ó¥Ã¥È4¤ÎÃͤ˴ð¤Å¤­ parity ¤ò¾ï¤Ë¡Ö1¡×¤«¡Ö0¡×¤Ë¤·¤Þ¤¹.
Bit 4 Even Parity Select (EPS). parity ¤¬Í­¸ú¤Ç¥Ó¥Ã¥È5¤¬¡Ö0¡×¤Î¾ì¹ç, ¤³¤Î¥Ó¥Ã¥È¤ÎÀßÄê¤Ï¶ö¿ô parity ¤¬Á÷¿®¤½ ¤·¤ÆÍ׵ᤵ¤ì¤ë¤è¤¦¤Ë¤·¤Þ¤¹. ¤½¤¦¤Ç¤Ê¤± ¤ì¤Ð´ñ¿ô parity ¤¬»ÈÍѤµ¤ì¤Þ¤¹.
Bit 3 Parity Enable (PEN). ¡Ö1¡×¤ËÀßÄꤵ¤ì¤Æ¤¤¤ë¾ì¹ç, ¥Ç¡¼¥¿¤ÎºÇ ¸å¤Î¥Ó¥Ã¥È¤È¥¹¥È¥Ã¥×¥Ó¥Ã¥È¤Î´Ö¤Ë parity ¥Ó¥Ã¥È¤¬ÁÞÆþ¤µ¤ì¤Þ¤¹. ¤Þ¤¿ UART ¤Ï¼õ¿®¥Ç¡¼¥¿¤Ë¸ºß¤¹¤ë parity ¤òÍ׵᤹ ¤ë¤Ç¤·¤ç¤¦.
Bit 2 Number of Stop Bits (STB). ¡Ö1¡×¤ËÀßÄꤵ¤ì¤Æ¤¤¤ë¾ì¹ç, 5-bit ¥Ç¡¼ ¥¿Ì¿Îá¤ò»ÈÍѤ·¤Æ, 1.5¤Î Stop ¥Ó¥Ã¥È¤¬ Á÷¿®¤µ¤ì³Æ¥Ç¡¼¥¿Ì¿ÎáÆâ¤ËÍ׵ᤵ¤ì¤Þ ¤¹. 6, 7 ¤½¤·¤Æ 8-bit ¥Ç¡¼¥¿Ì¿Îá¤ËÂФ· ¤Æ¤Ï, 2¤Ä¤Î Stop ¥Ó¥Ã¥È¤¬Á÷¿®¤µ¤ìÍ×µá ¤µ¤ì¤Þ¤¹. ¤³¤Î¥Ó¥Ã¥È¤¬¡Ö0¡×¤ËÀßÄꤵ¤ì ¤Æ¤¤¤ë¾ì¹ç, 1¤Ä¤Î Stop ¥Ó¥Ã¥È¤¬³Æ¥Ç¡¼ ¥¿Ì¿Îá¤Ç»ÈÍѤµ¤ì¤Þ¤¹.
Bit 1 Word Length Select Bit #1 (WLSB1)
Bit 0 Word Length Select Bit #0 (WLSB0)
  ¤³¤ì¤é¤Î¥Ó¥Ã¥È¤Ï¶¦¤Ë ³Æ¥Ç¡¼¥¿Ì¿ÎáÆâ¤Î¥Ó¥Ã ¥È¤Î¿ô¤ò»ØÄꤷ¤Þ¤¹.
  1 0 Ì¿ÎáĹ
  0 0 5 Data Bits
  0 1 6 Data Bits
  1 0 7 Data Bits
  1 1 8 Data Bits
+0x04 write/read
Modem Control Register (MCR)
Bit 7 ͽÌóºÑ¤ß, ¾ï¤Ë 0.
Bit 6 ͽÌóºÑ¤ß, ¾ï¤Ë 0.
Bit 5 ͽÌóºÑ¤ß, ¾ï¤Ë 0.
Bit 4 Loop-Back Enable. ¡Ö1¡×¤ËÀßÄꤵ¤ì¤Æ¤¤¤ë¾ì¹ç, UART ¤Î¥È¥é ¥ó¥¹¥ß¥Ã¥¿¤È¥ì¥·¡¼¥Ð¤Ï¿ÇÃǽèÍý¤Î¤¿¤á¤Ë ÆâÉôŪ¤ËÁê¸ß¤ËÀܳ¤µ¤ì¤Þ¤¹. ÉÕ¤±²Ã¤¨¤Æ UART ¤Î¥â¥Ç¥àÀ©¸æ½ÐÎϤϥâ¥Ç¥àÀ©¸æÆþÎÏ ¤ËÀܳ¤µ¤ì¤Þ¤¹. CTS ¤Ï RTS ¤Ø, DTR ¤Ï DSR¤Ø, OUT 1 ¤Ï R1 ¤Ø, OUT 2 ¤Ï DCD ¤Ø ³Æ¡¹Àܳ¤µ¤ì¤Þ¤¹.
Bit 3 OUT 2. ¥Û¥¹¥È¤Î¥×¥í¥»¥Ã¥µ¤¬ high ¤Þ¤¿¤Ï low ¤ËÀßÄꤹ¤ë¤Ç¤¢¤í¤¦Êä½õŪ¤Ê½ÐÎÏ. IBM PC ¤Î¥·¥ê¥¢¥ë¥¢¥À¥×¥¿ (¤È¥¯¥í¡¼¥ó¤ÎËØ¤É) ¤Ç¤Ï, OUT 2 ¤Ï 8250/16450/16550 UART ¤«¤é¤Î³ä¤ê¹þ¤ß¿®¹æ¤ò¥Ï¥¤¥¤¥ó¥Ô¡¼¥À¥ó¥¹ (̵¸ú) ¤Ë¤¹¤ë¤Î¤Ë»ÈÍѤµ¤ì¤Þ¤¹.
Bit 2 OUT 1. ¥Û¥¹¥È¤Î¥×¥í¥»¥Ã¥µ¤¬ high ¤Þ¤¿¤Ï low ¤ËÀßÄꤹ¤ë¤Ç¤¢¤í¤¦Êä½õŪ¤Ê½ÐÎÏ. IBM PC ¤Î¥·¥ê¥¢¥ë¥¢¥À¥×¥¿¤Ç¤Ï¤³¤Î½ÐÎϤϻÈÍÑ ¤µ¤ì¤Þ¤»¤ó.
Bit 1 Request to Send (RTS). ¡Ö1¡×¤ËÀßÄꤵ¤ì¤Æ¤¤¤ë¾ì¹ç, UART ¤Î -RTS ¥é¥¤¥ó¤Î½ÐÎÏ¤Ï Low (Í­¸ú) ¤È¤Ê¤ê ¤Þ¤¹.
Bit 0 Data Terminal Ready (DTR). ¡Ö1¡×¤ËÀßÄꤵ¤ì¤Æ¤¤¤ë¾ì¹ç, UART ¤Î -DTR ¥é¥¤¥ó¤Î½ÐÎÏ¤Ï Low (Í­¸ú) ¤È¤Ê¤ê ¤Þ¤¹.
+0x05 write/read
Line Status Register (LSR)
Bit 7 Error in Receiver FIFO. 8250/16450 UART ¤Ç¤Ï, ¤³¤Î¥Ó¥Ã¥È¤Ï¥¼¥í ¤Ç¤¹. FIFO¤ÎÃæ¤Ë¼¡¤Î¥¨¥é¡¼¾ò·ï¤¬°ì¤Ä°Ê ¾å´Þ¤Þ¤ì¤Æ¤¤¤ë¾ì¹ç, ¤³¤Î¥Ó¥Ã¥È¤Ï¡Ö1¡× ¤ËÀßÄꤵ¤ì¤Þ¤¹: PE, FE, ¤Þ¤¿¤Ï BI.
Bit 6 Transmitter Empty (TEMT). ¡Ö1¡×¤ËÀßÄꤵ¤ì¤Æ¤¤¤ë¾ì¹ç, Á÷¿® FIFO ¤Þ¤¿¤ÏÁ÷¿® shift ¥ì¥¸¥¹¥¿Ãæ¤Ë»Ä¤Ã¤Æ¤¤ ¤ëÌ¿Îá¤Ï¤¢¤ê¤Þ¤»¤ó. ¥È¥é¥ó¥¹¥ß¥Ã¥¿¤Ï´° Á´¤ËƯ¤¤¤Æ¤¤¤Þ¤»¤ó.
Bit 5 Transmitter Holding Register Empty (THRE). ¡Ö1¡×¤ËÀßÄꤵ¤ì¤Æ¤¤¤ë¾ì¹ç, ¸½ºß FIFO (¤Þ¤¿¤Ï holding ¥ì¥¸¥¹¥¿) ¤Ë¤Ï¾¯¤Ê¤¯¤È ¤â°ì¤Ä¤ÎÁ÷¿®¤µ¤ì¤ëÉÕ²ÃŪ¤ÊÌ¿Îá¤ËÂФ¹¤ë ¶õ¤­¤¢¤ê¤Þ¤¹. ¤³¤Î¥Ó¥Ã¥È¤¬¡Ö1¡×¤ËÀßÄê ¤µ¤ì¤Æ¤¤¤ë»þ¤Ï, ¿ʬ¥È¥é¥ó¥¹¥ß¥Ã¥¿¤Ï¤Þ ¤ÀÁ÷¿®¤·¤Æ¤¤¤Þ¤¹.
Bit 4 Break Interrupt (BI). ¥ì¥·¡¼¥Ð¤Ï Break ¥·¥°¥Ê¥ë¤ò¸¡ÃΤ·¤Þ¤·¤¿.
Bit 3 Framing Error (FE). Start ¥Ó¥Ã¥È¤¬¸¡ÃΤµ¤ì¤Þ¤·¤¿¤¬, Stop ¥Ó¥Ã¥È¤ÏÍ׵ᤵ¤ì¤¿»þ´ÖÆâ¤Ë¤Ï¸½¤ì¤Þ¤»¤ó ¤Ç¤·¤¿. ¼õ¿®¤µ¤ì¤¿Ì¿Îá¤Ï¤ª¤½¤é¤¯¾¡¼ê¤Ë ²ò¼á¤µ¤ì¤Þ¤¹.
Bit 2 Parity Error (PE). parity ¥Ó¥Ã¥È¤¬¼õ¿®¤µ¤ì¤¿Ì¿Îá¤ËÂФ·¤Æ ÉÔÀµ¤Ç¤¹.
Bit 1 Overrun Error (OE). ¿·¤·¤¤Ì¿Î᤬¼õ¿®¤µ¤ì, ¼õ¿®¥Ð¥Ã¥Õ¥¡¤Ë¶õ ¤­¤¬¤¢¤ê¤Þ¤»¤ó¤Ç¤·¤¿. shift ¥ì¥¸¥¹¥¿¤Ë ¿·¤¿¤ËÅþÃ夷¤¿Ì¿Îá¤ÏÇË´þ¤µ¤ì¤Þ¤¹. 8250/16450 UART ¤Ç¤Ï, holding ¥ì¥¸¥¹¥¿ Æâ¤ÎÌ¿Îá¤ÏÇË´þ¤µ¤ì¿·¤¿¤ËÅþÃ夷¤¿Ì¿Îá¤Ï holding ¥ì¥¸¥¹¥¿¤ËÃÖ¤«¤ì¤Þ¤¹.
Bit 0 Data Ready (DR) °ì¤Ä°Ê¾å¤ÎÌ¿Î᤬¥Û¥¹¥È¤¬ÆÉ¤à¤Ç¤¢¤í¤¦¼õ ¿® FIFO ¤Ë¤¢¤ê¤Þ¤¹. ¤³¤Î¥Ó¥Ã¥È¤¬ÀßÄꤵ ¤ì¤ëÁ°¤Ë, Ì¿Îá¤Ï´°Á´¤Ë¼õ¿®¤µ¤ì shift ¥ì¥¸¥¹¥¿¤«¤é FIFO (¤Þ¤¿¤Ï 8250/16450 ¤ÎÀß·×¤Ç¤Ï holding ¥ì¥¸¥¹¥¿) ¤Ø°Üư¤µ ¤ì¤Ê¤±¤ì¤Ð¤Ê¤ê¤Þ¤»¤ó.
+0x06 write/read
Modem Status Register (MSR)
Bit 7 Data Carrier Detect (DCD). UART ¤Î DCD ¥é¥¤¥ó¤Î¾õÂÖ¤òÈ¿±Ç¤·¤Þ¤¹.
Bit 6 Ring Indicator (RI). UART ¤Î RI ¥é¥¤¥ó¤Î¾õÂÖ¤òÈ¿±Ç¤·¤Þ¤¹.
Bit 5 Data Set Ready (DSR). UART ¤Î DSR ¥é¥¤¥ó¤Î¾õÂÖ¤òÈ¿±Ç¤·¤Þ¤¹.
Bit 4 Clear To Send (CTS). UART ¤Î CTS ¥é¥¤¥ó¤Î¾õÂÖ¤òÈ¿±Ç¤·¤Þ¤¹.
Bit 3 Delta Data Carrier Detect (DDCD). ¥Û¥¹¥È¤Ë¤è¤Ã¤Æ MSR ¤¬ºÇ¸å¤ËÆÉ¤ß¹þ¤Þ¤ì ¤¿»þÅÀ¤«¤é, -DCD ¥é¥¤¥ó¤¬¾õÂÖ¤ò°ì²ó°Ê ¾åÊѤ¨¤¿¾ì¹ç¤Ë¡Ö1¡×¤ËÀßÄꤵ¤ì¤Þ¤¹.
Bit 2 Trailing Edge Ring Indicator (TERI). ¥Û¥¹¥È¤Ë¤è¤Ã¤Æ MSR ¤¬ºÇ¸å¤ËÆÉ¤ß¹þ¤Þ¤ì ¤¿»þÅÀ¤«¤é, -RI ¥é¥¤¥ó¤¬ low ¤«¤é high ¤Ø°Ü¤êÊѤï¤Ã¤¿¾ì¹ç¤Ë¡Ö1¡×¤ËÀßÄꤵ¤ì¤Þ ¤¹.
Bit 1 Delta Data Set Ready (DDSR). ¥Û¥¹¥È¤Ë¤è¤Ã¤Æ MSR ¤¬ºÇ¸å¤ËÆÉ¤ß¹þ¤Þ¤ì ¤¿»þÅÀ¤«¤é, -DSR ¥é¥¤¥ó¤¬¾õÂÖ¤ò°ì²ó°Ê ¾åÊѤ¨¤¿¾ì¹ç¤Ë¡Ö1¡×¤ËÀßÄꤵ¤ì¤Þ¤¹.
Bit 0 Delta Clear To Send (DCTS). ¥Û¥¹¥È¤Ë¤è¤Ã¤Æ MSR ¤¬ºÇ¸å¤ËÆÉ¤ß¹þ¤Þ¤ì ¤¿»þÅÀ¤«¤é, -CTS ¥é¥¤¥ó¤¬¾õÂÖ¤ò°ì²ó°Ê ¾åÊѤ¨¤¿¾ì¹ç¤Ë¡Ö1¡×¤ËÀßÄꤵ¤ì¤Þ¤¹.
+0x07 write/read Scratch Register (SCR). ¤³¤Î¥ì¥¸¥¹¥¿¤Ï UART ¤Ç¤Ïµ¡Ç½¤·¤Þ¤»¤ó. ¤³¤Î¾ì½ê ¤Ë¤Ï ¤É¤ó¤ÊÃͤǤâ¥Û¥¹¥È¤Ë¤è¤Ã¤Æ½ñ¤­¹þ¤Þ¤ì¤ë¤³ ¤È¤¬¤Ç¤­, ¤½¤Î¸å¥Û¥¹¥È¤Ë¤è¤Ã¤ÆÆÉ¤ß¹þ¤à¤³¤È¤¬²Ä ǽ¤Ç¤¹.

16550A UART ¤ò±Û¤¨¤Æ

¥Ê¥·¥ç¥Ê¥ë¡¦¥»¥ß¥³¥ó¥À¥¯¥¿¤ÏÉÕ²ÃŪ¤Êµ¡Ç½¤ò»ý¤Ä 16550 ¤È¸ß´¹ À­¤Î¤¢¤ëÉôÉʤòÄ󶡤·¤Æ¤¤¤Þ¤»¤ó¤¬, ¿§¡¹¤Ê¾¤Î¥Ù¥ó¥À¤¬¤½¤ì¤ò»ý¤Ã ¤Æ¤¤¤Þ¤¹. ¤³¤ì¤é¤ÎÉôÉʤδö¤Ä¤«¤Ï°Ê²¼¤Ëµ­½Ò¤µ¤ì¤Æ¤¤¤Þ¤¹. ¸ú²ÌŪ ¤Ë¤³¤ì¤é¤Î²þÎɤò»ÈÍѤ¹¤ë¤¿¤á¤Ë¤Ï, ËØ¤É¤Î¥Ý¥Ô¥å¥é¡¼¤Ê¥ª¥Ú¥ì¡¼¥Æ¥£ ¥ó¥°¥·¥¹¥Æ¥à¤¬ 16550 ¤¬Ä󶡤¹¤ëµ¡Ç½°Ê¾å¤Î¤â¤Î¤ò¥µ¥Ý¡¼¥È¤·¤Ê¤¤ ¤¿¤á, ¥É¥é¥¤¥Ð¤Ï¥Á¥Ã¥×¥Ù¥ó¥À¤«¤éÄ󶡤µ¤ì¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¤³¤È¤ò Íý²ò¤·¤Æ¤ª¤¯É¬Íפ¬¤¢¤ê¤Þ¤¹.

ST16650

¥Ç¥Õ¥©¥ë¥È¤Ç¤Ï¤³¤ÎÉôÉÊ¤Ï NS16550A ¤È»÷¤Æ¤¤¤Þ¤¹¤¬, ³È Ä¥¤µ¤ì¤¿32¥Ð¥¤¥È¤ÎÁ÷¼õ¿®¥Ð¥Ã¥Õ¥¡¤ò ¥ª¥×¥·¥ç¥ó¤ÇÍ­¸ú¤Ë¤Ç ¤­¤Þ¤¹. Startech ¤Ë¤è¤êÀ½Â¤¤µ¤ì¤Þ¤·¤¿.

TIL16660

¥Ç¥Õ¥©¥ë¥È¤Ç¤Ï¤³¤ÎÉôÉÊ¤Ï NS16550A ¤ÈÎà»÷¤·¤¿¿¶Éñ¤¤¤ò ¤·¤Þ¤¹¤¬, ³ÈÄ¥¤µ¤ì¤¿64¥Ð¥¤¥È¤ÎÁ÷¼õ¿®¥Ð¥Ã¥Õ¥¡¤ò¥ª¥×¥·¥ç ¥ó¤ÇÍ­¸ú¤Ë¤Ç¤­¤Þ¤¹. Texas Instruments ¤Ë¤è¤êÀ½Â¤¤µ¤ì¤Þ ¤·¤¿.

Hayes ESP

¤³¤ÎÀìÇäÆÃµö¤Î¥×¥é¥°¥¤¥ó¥«¡¼¥É¤Ï, 2048¥Ð¥¤¥È¤ÎÁ÷¼õ ¿®¥Ð¥Ã¥Õ¥¡¤ò´Þ¤ß, 230.4Kbit/sec ¤Î¥Ç¡¼¥¿¥ì¡¼¥È¤ò¥µ¥Ý¡¼ ¥È¤·¤Þ¤¹. Hayes ¤Ë¤è¤êÀ½Â¤¤µ¤ì¤Þ¤·¤¿.

¤³¤ì¤é¤Î``¥À¥à''UART ¤Ë²Ã¤¨, ¤¿¤¯¤µ¤ó¤Î¥Ù¥ó¥À¤¬¥¤¥ó¥Æ¥ê¥¸¥§ ¥ó¥È¥·¥ê¥¢¥ë¥³¥ß¥Ë¥å¥±¡¼¥·¥ç¥ó¥Ü¡¼¥É¤òÀ½Â¤¤·¤Æ¤¤¤Þ¤¹. ¤³ ¤Î¥¿¥¤¥×¤ÎÀ߷פÏÄ̾ï¥Þ¥¤¥¯¥í¥×¥í¥»¥Ã¥µ¤òÄ󶡤·¤Æ¤ª¤ê, ¤³¤Î¥Þ¥¤ ¥¯¥í¥×¥í¥»¥Ã¥µ¤Ï´ö¤Ä¤«¤Î UART ¤Ø¤Î¥¤¥ó¥¿¥Õ¥§¡¼¥¹¤È¤Ê¤Ã¤Æ¥Ç¡¼¥¿ ¤ò½èÍý / ¥Ð¥Ã¥Õ¥¡¥ê¥ó¥°¤·, ¤½¤·¤ÆÉ¬Íפʻþ¤Ë¥á¥¤¥ó¤Î PC ¤Î¥×¥í¥»¥Ã ¥µ¤Ø·Ù¹ð¤ò½Ð¤·¤Þ¤¹. UART ¤Ï¤³¤Î¥¿¥¤¥×¤Î¥³¥ß¥Ë¥å¥±¡¼¥·¥ç¥ó¥· ¥¹¥Æ¥à¤Ë¤ª¤¤¤Æ PC ¤Î¥×¥í¥»¥Ã¥µ¤Ë¤è¤Ã¤ÆÄ¾ÀÜ¥¢¥¯¥»¥¹¤µ¤ì¤Ê¤¤¤¿¤á, ¥Ù¥ó¥À¤Ë¤È¤Ã¤Æ¤Ï 8250, 16450, ¤Þ¤¿¤Ï 16550 UART ¤È¸ß´¹À­¤Î¤¢¤ë UART ¤ò»ÈÍѤ¹¤ëɬÍפϤ¢¤ê¤Þ¤»¤ó. ¤³¤ì¤Ë¤è¤êÀß·×¼Ô¤Ï, ¤è¤êÎɤ¤ À­Ç½ÆÃÀ­¤ò»ý¤ÄÉôÉʤ¬¼«Í³¤ËÍøÍѤǤ­¤Þ¤¹.

sio¥É¥é¥¤¥Ð¤ÎÀßÄê

sio ¥É¥é¥¤¥Ð¤Ï, NS8250-, NS16450-, NS16550¤ÈNS16550A ¥Ù¡¼¥¹¤Î EIA RS-232C(CCITT V.24) ÄÌ¿®ÍÑ¥¤¥ó¥¿¥Õ¥§¡¼¥¹¤ò¥µ¥Ý¡¼¥È¤·¤Þ¤¹. ¤Þ ¤¿, ¤¤¤¯¤Ä¤«¤Î¥Þ¥ë¥Á¥Ý¡¼¥È¥·¥ê¥¢¥ë¥«¡¼¥É¤â¥µ¥Ý¡¼¥È¤µ¤ì¤Æ¤¤¤Þ¤¹. µ»½ÑŪ ¤Ê¾ÜºÙ¤Ë¤Ä¤¤¤Æ¤Ï¥Þ¥Ë¥å¥¢¥ë sio(4) ¤ò¸«¤Æ¤¯¤À¤µ¤¤.

Digi International (DigiBoard) PC/8

¸¶ºî: Andrew Webster . 1995ǯ8·î26Æü.

Ìõ: ¶ûÅÄ ¾»´õ .6 September 1996.

°Ê²¼¤ËDigi International PC/8D¤È16550¥Á¥Ã¥×¤òưºî¤µ¤»¤ë¤¿¤á¤Î, ¥«¡¼¥Í ¥ëconfig¤ÎÉôʬ¤ò¼¨¤·¤Þ¤¹. ¤³¤Î¥Ü¡¼¥É¤Ï, 8ËܤβóÀþ¤Ë¤¹¤Ù¤Æ¥â¥Ç¥à¤òÀܳ ¤·¤¿¾ì¹ç¤Ç¤âÎɹ¥¤Ëưºî¤·¤Þ¤¹.

options COM_MULTIPORT ¤ò²Ã¤¨¤ë¤Î¤ò˺¤ì¤Ê¤¤¤Ç¤¯¤À¤µ¤¤. ˺¤ì¤ë ¤È¤¦¤Þ¤¯Æ°ºî¤·¤Þ¤»¤ó!

device          sio4    at isa? port 0x100 tty flags 0xb05 device
        sio5    at isa? port 0x108 tty flags 0xb05 device
        sio6    at isa? port 0x110 tty flags 0xb05 device
        sio7    at isa? port 0x118 tty flags 0xb05 device
        sio8    at isa? port 0x120 tty flags 0xb05 device
        sio9    at isa? port 0x128 tty flags 0xb05 device
        sio10   at isa? port 0x130 tty flags 0xb05 device
        sio11   at isa? port 0x138 tty flags 0xb05 irq 9 vector
        siointr

¤³¤³¤Ç³Æ SIO ¥Ý¡¼¥È¤¬³ä¤ê¹þ¤ß¤ò¶¦Í­¤¹¤ë°ì¤Ä¤Î¥°¥ë¡¼¥×¤Ç¤¢¤ë¤³¤È¤òɽ¸½ ¤¹¤ë¤¿¤á¤Ë, ¥È¥ê¥Ã¥­¡¼¤ÊÀßÄê¤ò¤·¤Ê¤±¤ì¤Ð¤Ê¤ê¤Þ¤»¤ó. ¥Õ¥é¥° (flags ¤Î¸å ¤í¤Î 16 ¿Ê¿ô) ¤Î²¼¤«¤é 2 ¥Ð¥¤¥ÈÌܤˤ³¤Î¥°¥ë¡¼¥×¤ÎºÇ¸å¤Î SIO ¥Ý¡¼¥È¤ÎÈÖ ¹æ¤òÀßÄꤷ¤Þ¤¹. ¤³¤ÎÎã¤Ç¤Ï 11 (16¿Ê¿ô¤Ç¤Ï 0x0b) ¤Ç¤¹¤«¤é, ³Æ¥Ç¥Ð¥¤¥¹¤Î ¥Õ¥é¥°¤Ï 0xb05 ¤È¤Ê¤ê¤Þ¤¹.

Boca 16

´ó£ Don Whiteside . 1995ǯ8·î26Æü

FreeBSD ¤Ç Boca 16pord ¤Î¥Ü¡¼¥É¤òư¤«¤¹¤³¤È¤Ï´Êñ¤Ç¤¹¤¬, ¤½¤Î¤¿ ¤á¤Ë¤Ï¤¤¤¯¤Ä¤«¤Îºî¶È¤¬É¬ÍפǤ¹. :

  1. 2.0.5 ¤Î¥Ç¥Õ¥©¥ë¥È¤Î¥«¡¼¥Í¥ë¤Ï, ¥Þ¥ë¥Á¥Ý¡¼¥È¤Î¥µ¥Ý¡¼¥È¤ò¤·¤Æ ¤¤¤Ê¤¤ ¤Î¤Ç, ¤¢¤Ê¤¿¤Ï³Æ¥Ý¡¼¥ÈËè¤Ë¥Ç¥Ð¥¤¥¹¥¨¥ó¥È¥ê¤òÄɲ乤ëɬÍפ¬ ¤¢¤ê¤Þ¤¹. ¤Ä¤Þ¤êɬÍפʥª¥×¥·¥ç¥ó¤òÉÕ¤±¤Æ, ¥«¡¼¥Í¥ë¤ÎºÆ¹½ÃÛ¤ò¤·¤Ê¤±¤ì¤Ð ¤Ê¤ê¤Þ¤»¤ó. ¤½¤Î¤¿¤á¤Ë¤Ï, ¤¢¤Ê¤¿¤Î¥Þ¥·¥ó¤Ë¥«¡¼¥Í¥ë¤Î¥½¡¼¥¹¥³¡¼¥É¤¬´û¤Ë ¥¤¥ó¥¹¥È¡¼¥ë¤µ¤ì¤Æ¤¤¤ë¤«, ¤¢¤Ê¤¿¤ÎÂØ¤ï¤ê¤Î狼¤Ë¥«¡¼¥Í¥ëºÆ¹½ÃÛ¤ò¤ä¤Ã¤Æ ¤â¤é¤¦É¬Íפ¬¤¢¤ê¤Þ¤¹.

  2. 2ÈÖÌܤË, ¤¢¤Ê¤¿¤Ï¥«¡¼¥Í¥ë¥ª¥×¥·¥ç¥ó¤òÀµ¤·¤¯ÀßÄꤹ¤ë¤¿¤á¤Ë, ¤¢¤Ê ¤¿¤ÎBoca Board¤Î IO ¤È³ä¤ê¹þ¤ß¤ÎÃͤòÃΤäƤ¤¤ëɬÍפ¬¤¢¤ê¤Þ¤¹.

¤Ò¤È¤Ä½ÅÍפʤ³¤È¤¬¤¢¤ê¤Þ¤¹. Boca 16 ¤Ë»È¤ï¤ì¤Æ¤¤¤ë¼ÂºÝ¤Î UART ¥Á¥Ã¥× ¤Ï, Boca 16 ¤Î¥Ü¡¼¥É¤Ç¤Ï¤Ê¤¯, ³°ÉÕ¤±¤Î¥³¥Í¥¯¥¿¥Ü¥Ã¥¯¥¹¤ÎÃæ¤Ë¸ºß¤·¤Þ¤¹. ¥³¥Í¥¯¥¿¥Ü¥Ã¥¯¥¹¤òÀܳ¤·¤Ê¤¤¤È, ¥Ý¡¼¥È¤Î¸¡½Ð¤Ë¼ºÇÔ¤¹¤ë¤Ç¤·¤ç¤¦. »ä¤Ï, Àܳ¤·¤Ê¤¤¤Þ¤Þµ¯Æ°¤·¤¿¤ê, ¸å¤«¤éÀܳ¤·¤Ê¤ª¤·¤¿¤ê¤·¤¿»þ¤Ë¤É¤¦¤Ê¤ë¤«¤ò¥Æ ¥¹¥È¤·¤Æ¤¤¤Þ¤»¤ó. ¤É¤Á¤é¤â¼Â¹Ô¤·¤Ê¤¤¤è¤¦¤ª¾©¤á¤·¤Þ¤¹.

¤â¤·¤¢¤Ê¤¿¤¬¥«¥¹¥¿¥Þ¥¤¥ººÑ¤ß¤Î¥«¡¼¥Í¥ë ¥³¥ó¥Õ¥£¥°¥ì¡¼¥·¥ç¥ó¥Õ¥¡¥¤¥ë¤ò»ý¤Ã ¤Æ¤¤¤Ê¤±¤ì¤Ð, °ìÈÌŪ¤Ê»öÊÁ¤Ë¤Ä¤¤¤Æ¤Ï, FreeBSD ¥«¡¼¥Í¥ë¤Î¥³¥ó¥Õ¥£¥°¥ì¡¼¥·¥ç¥ó ¤ò»²¹Í¤Ë¤·¤Æ¤¯¤À¤µ¤¤. °Ê²¼¤ËBoca 16¤Î¥Ü¡¼¥É ¤Ë´Ø·¸¤¹¤ëÉôʬ¤À¤±¤òµ­½Ò¤·¤Þ¤¹. ¤³¤ÎÎã¤Ç¤Ï, ¤¢¤Ê¤¿¤¬MYKERNEL¤È¤¤¤¦Ì¾Á° ¤Î¥«¡¼¥Í¥ë¤ò»È¤Ã¤Æ¤¤¤Æ, ¥¨¥Ç¥£¥¿¤Ë¤Ï vi¤ò»È¤Ã¤Æ¤¤¤ë¤³¤È¤ò²¾Äꤷ¤Æ¤¤¤Þ ¤¹.

  1. ¼¡¤Î1¹Ô¤òconfig¥Õ¥¡¥¤¥ë¤ËÄɲ䷤Ƥ¯¤À¤µ¤¤.

    options COM_MULTIPORT
    
  2. ¤³¤Î device sion¤È¤¤¤¦¹Ô¤ò, ɬÍפ˱þ¤¸¤Æ 16 ¸Ä¤Î¥Ç¥Ð¥¤¥¹Ê¬¤òÄɲ䷤Ƥ¯¤À¤µ¤¤. ºÇ¸å¤Î¥Ç¥Ð¥¤¥¹¤Ë¤À¤±, ¤³¤Î¥Ü¡¼¥É ¤Î³ä¤ê¹þ¤ß¥Ù¥¯¥¿¤òµ­½Ò¤·¤Þ¤¹. (¾ÜºÙ¤Ï sio(4) ¤Î¥Þ¥Ë¥å¥¢ ¥ë¥Ú¡¼¥¸¤ò»²¾È¤·¤Æ¤¯¤À¤µ¤¤.) °Ê²¼¤ÎÎã¤Ï, ³ä¤ê¹þ¤ß 3, ¥Ù¡¼¥¹ IO ¥¢¥É¥ì¥¹ 100h ¤ÎÃͤò»ý¤Ä Boca Board ¤Î¾ì¹ç¤Ç¤¹. ³Æ¥Ý¡¼¥È¤Î¤¿¤á¤Î IO ¥¢¥É¥ì¥¹¤Ï, 100h, 108h, 110h, ... ¤Î¤è ¤¦¤Ë 16 ¿ÊË¡¤Ç 8 ¤Å¤Ä²Ã¤¨¤Æ¤¤¤­¤Þ¤¹.

    device sio1 at isa? port 0x100 tty flags 0x1005 device sio2 at isa?
            port 0x108 tty flags 0x1005 device sio3 at isa? port
            0x110 tty flags 0x1005 device sio4 at isa? port 0x118
            tty flags 0x1005 ... device sio15 at isa? port
            0x170 tty flags 0x1005 device sio16 at isa? port 0x178
            tty flags 0x1005 irq 3 vector siointr
    

    ¥Õ¥é¥°¥¨¥ó¥È¥ê¤Ï, ¤¢¤Ê¤¿¤¬Á´¤¯Æ±¤¸sio¤Î³ä¤êÅö¤Æ¤ò»È¤Ã¤Æ¤¤¤Ê¤¤¸Â¤ê ɬ¤º ¾åµ­¤ÎÎ㤫¤éÊѹ¹¤·¤Æ¤¯¤À¤µ¤¤. ¥Õ¥é¥°¤Ï, ¼¡¤Î¤è¤¦¤ËÀßÄꤷ¤Þ¤¹. 0x M YY ¤ÎM¤Ï, ¥Þ¥¹¥¿¥Ý¡¼¥È (Boca 16¤ËÅëºÜ¤µ¤ì¤¿ºÇ¸å ¤Î¥Ý¡¼¥È)¤Î¥Þ¥¤¥Ê¡¼ÈÖ¹æ¤ò»ØÄꤷ¤Þ¤¹. ¤µ¤é¤Ë YY ¤ÎÉôʬ¤ÏFIFO¤¬ Í­¸ú¤Þ¤¿¤Ï̵¸ú¤Ç¤¢¤ë¤³¤È (¤³¤Î¾ì¹ç¤ÏÍ­¸ú), ³ä¤ê¹þ¤ß¤ò (¥Ü¡¼¥ÉÆâ¤Ç) ¶¦ Í­¤·¤Æ¤¤¤ë¤« (¤³¤Î¾ì¹ç¤ÏYES), ¤½¤·¤Æ, AST/4 ¤È¸ß´¹À­¤Î¤¢¤ë»ý¤Ä³ä¤ê¹þ¤ß À©¸æ¥ì¥¸¥¹¥¿¤ò»ý¤Ã¤Æ¤¤¤ë¤« (¤³¤Î¾ì¹ç¤ÏNO) ¤ò»ØÄꤷ¤Þ¤¹. ¤³¤ÎÎã¤Ç¤Ï,

    flags 0x1005
    

    ¤È¤¤¤¦¥Õ¥é¥°¤Ë¤è¤Ã¤Æ, ¥Þ¥¹¥¿¥Ý¡¼¥È¤¬ sio16 ¤Ç¤¢¤ë¤³¤È¤ò¼¨¤·¤Þ¤¹. ¤â ¤·Æ±¤¸¥Ü¡¼¥É¤ò¤â¤¦°ìËçÄɲä·, sio17 ¤«¤é sio28 ¤ò³ä¤êÅö¤Æ¤ë¤Ê¤é, ¿·¤·¤¤Êý¤Î ¥Ü¡¼¥É¤ËÂбþ¤¹¤ë 16 ¸Ä¤Î¥Ý¡¼¥È¤Î¥Õ¥é¥°¤Ï¤¹¤Ù¤Æ 0x1C05 ¤Ë ¤Ê¤ê¤Þ¤¹. 28 (== 0x1C) ¤Ï¿·¤·¤¤¥Ü¡¼¥É¤Î¥Þ¥¹¥¿¥Ý¡¼¥È¤Î¥Þ¥¤¥Ê¡¼ÈÖ¹æ¤Ç ¤¹. ¥Õ¥é¥°¤Î 05 ¤ÎÉôʬ¤ÏÊѹ¹¤·¤Ê¤¤¤Ç¤¯¤À¤µ¤¤.

  3. ¥«¡¼¥Í¥ë¥³¥ó¥Õ¥£¥°¥ì¡¼¥·¥ç¥ó¥Õ¥¡¥¤¥ë¤ò Êݸ¤·¤Æ¥«¡¼¥Í¥ë¤ÎÀßÄê¤ò´°Î»¤·¤Þ ¤¹. ¥«¡¼¥Í¥ë¤ò¥³¥ó¥Ñ¥¤¥ë¸å, ¥¤¥ó¥¹¥È¡¼¥ë¤·, ¿·¤·¤¤¥«¡¼¥Í¥ë¤Ç¥ê¥Ö¡¼¥È¤· ¤Æ¤¯¤À¤µ¤¤. ºÆ¥³¥ó¥Ñ¥¤¥ë¤µ¤ì¤¿¥«¡¼¥Í¥ë¤¬¤¦¤Þ¤¯¥¤¥ó¥¹¥È¡¼¥ë¤µ¤ì¤Æ, ¤½¤Î¥«¡¼¥Í¥ë¤ËÀµ ¤·¤¤¥¢¥É¥ì¥¹¤È³ä¤ê¹þ¤ß¤¬ÀßÄꤵ¤ì¤Æ¤¤¤¿¤Ê¤é¤Ð, ¥Ö¡¼¥È¥á¥Ã¥»¡¼¥¸¤Ï¼¡¤Î ¤è¤¦¤Ë Boca ¥Ý¡¼¥È¤Î¸¡½Ð¤ËÀ®¸ù¤¹¤ë¤Ï¤º¤Ç¤¹: (sio¤ÎÈÖ¹æ, IO¤ÈIRQ¤ÎÃͤÏ, ¤³¤ÎÎã¤È¤Ï°Û¤Ê¤Ã¤Æ¤¤¤ë¤Ç¤·¤ç¤¦)

    sio1 at 0x100-0x107 flags 0x1005 on isa
    sio1: type 16550A (multiport)
    sio2 at 0x108-0x10f flags 0x1005 on isa
    sio2: type 16550A (multiport)
    sio3 at 0x110-0x117 flags 0x1005 on isa
    sio3: type 16550A (multiport)
    sio4 at 0x118-0x11f flags 0x1005 on isa
    sio4: type 16550A (multiport)
    sio5 at 0x120-0x127 flags 0x1005 on isa
    sio5: type 16550A (multiport)
    sio6 at 0x128-0x12f flags 0x1005 on isa
    sio6: type 16550A (multiport)
    sio7 at 0x130-0x137 flags 0x1005 on isa
    sio7: type 16550A (multiport)
    sio8 at 0x138-0x13f flags 0x1005 on isa
    sio8: type 16550A (multiport)
    sio9 at 0x140-0x147 flags 0x1005 on isa
    sio9: type 16550A (multiport)
    sio10 at 0x148-0x14f flags 0x1005 on isa
    sio10: type 16550A (multiport)
    sio11 at 0x150-0x157 flags 0x1005 on isa
    sio11: type 16550A (multiport)
    sio12 at 0x158-0x15f flags 0x1005 on isa
    sio12: type 16550A (multiport)
    sio13 at 0x160-0x167 flags 0x1005 on isa
    sio13: type 16550A (multiport)
    sio14 at 0x168-0x16f flags 0x1005 on isa
    sio14: type 16550A (multiport)
    sio15 at 0x170-0x177 flags 0x1005 on isa
    sio15: type 16550A (multiport)
    sio16 at 0x178-0x17f irq 3 flags 0x1005 on isa
    sio16: type 16550A (multiport master)
    

    ¤â¤·¥á¥Ã¥»¡¼¥¸¤Îɽ¼¨¤¬Â®¤¯¤ÆÆÉ¤ß¼è¤ì¤Ê¤¤¤È¤­¤Ï,

    # dmesg | more
    
    ¤È¤¹¤ë¤È¥Ö¡¼¥È»þ¤Î¥á¥Ã¥»¡¼¥¸¤ò ¤æ¤Ã¤¯¤ê¸«¤ë¤³¤È¤¬¤Ç¤­¤Þ¤¹.
  4. ¼¡¤Ë, root ¤Ë¤Ê¤Ã¤Æ¤«¤é, ¥Ç¥Ð¥¤¥¹¤Ë¤¢¤ï¤»¤¿¥¨¥ó¥È¥ê¤ò /dev/MAKEDEV ¥¹¥¯¥ê¥×¥È¤ò»È¤Ã¤Æ/dev ¤ËÄɲä·¤Þ¤¹.

    # cd /dev
    # ./MAKEDEV tty1
    # ./MAKEDEV cua1
    (ÃæÎ¬)
    # ./MAKEDEV ttyg
    # ./MAKEDEV cuag
    

    ¤â¤·, ²¿¤é¤«¤ÎÍýͳ¤Çȯ¿®¤¹¤ë¥Ç¥Ð¥¤¥¹¤¬ÉÔÍפʾì¹ç, cua* ¥Ç¥Ð ¥¤¥¹¤òºî¤é¤Ê¤¤¤ÇºÑ¤Þ¤¹¤³¤È¤â¤Ç¤­¤Þ¤¹.

  5. ¥Ç¥Ð¥¤¥¹¤¬³Î¼Â¤Ëưºî¤·¤Æ¤¤¤ë¤«¤É¤¦¤« ³Îǧ¤¹¤ë¼ê¤Ã¼è¤êÁᤤÊýË¡¤Ï, ¤¢¤Ê¤¿¤¬ (root¤Ë¤Ê¤Ã¤Æ) ³Æ¥Ý¡¼¥È¤Ë¥â¥Ç¥à¤òÀܳ¤·¤Æ¤ß¤Æ, ¤¢¤Ê¤¿¤¬ºîÀ®¤· ¤¿³Æ¥Ç¥Ð¥¤¥¹Ëè¤Ë

    # echo at> ttyd*
    

    ¤È¤ä¤Ã¤Æ¤ß¤Æ¤¯¤À¤µ¤¤. ³Æ¥Ý¡¼ ¥È¤¬Æ°ºî¤·¤Æ¤¤¤ì¤Ð RX¤Îɽ¼¨¤¬¸÷¤ë¤Î¤¬¸«¤¨¤ë¤Ï¤º ¤Ç¤¹.

cy ¥É¥é¥¤¥Ð¤Î¥³¥ó¥Õ¥£¥°

¸¶ºî: Alex Nash . 6 June 1996.

Ìõ: Á°ÅÄ ¹¬ÈÏ . 6 September 1996.

Cyclades ¼Ò¤Î¥Þ¥ë¥Á¥Ý¡¼¥È¥«¡¼¥É¤Ï, ¾¤Î¥Þ¥ë¥Á¥Ý¡¼¥È¥«¡¼¥É¤¬ »È¤¦ sio ¤ÎÂå¤ï¤ê¤Ë cy¥É¥é¥¤¥Ð¤ò»È¤¤¤Þ¤¹. ¥³¥ó¥Õ¥£¥°¥ì¡¼¥·¥ç¥ó¤ÏÈó¾ï¤Ë´Êñ¤Ç,

  1. cy ¥Ç¥Ð¥¤¥¹¤ò¤¢¤Ê¤¿¤Î ¥«¡¼¥Í¥ë¤Î ¥³¥ó¥Õ¥£¥°¥ì¡¼¥·¥ç¥ó¤Ë­¤·¤Þ¤¹. (Ãí°Õ. ¤¢¤Ê¤¿¤Îirq¤äiomem¤ÎÀßÄ꤬°ã¤Ã¤Æ¤¤¤ë¤«¤â¤·¤ì¤Þ¤»¤ó)

    device cy0 at isa? tty irq 10 iomem 0xd4000 iosiz 0x2000 vector cyintr
    
  2. ¿·¤·¤¤¥«¡¼¥Í¥ë¤Î ºÆ¹½À®¤È ¥¤¥ó¥¹¥È¡¼¥ë ¤ò¤·¤Þ¤¹.

  3. ¥Ç¥Ð¥¤¥¹¥Î¡¼¥É ¤ò¼¡(8¥Ý¡¼¥È¤È²¾Äꤷ¤Æ¤¤¤Þ¤¹.) ¤Î¤è¤¦¤ËÂǤäƺî¤ê¤Þ¤¹:

    # cd /dev
    # for i in 0 1 2 3 4 5 6 7;do ./MAKEDEV cuac$i ttyc$i;done
    
  4. ¤â¤·, ɬÍ×¤Ê¤é ¥·¥ê¥¢¥ë¥Ç¥Ð¥¤¥¹ (ttyd) ¤È¤½¤Ã¤¯¤ê¤Ë¥³¥Ô¡¼¤·¤Æ dialup¥¨¥ó¥È¥ê¤òºî¤ê, ttyd¤ÎÂå¤ï¤ê¤Ë ttyc¤ò»È¤¤¤Þ¤¹. Îã:

    ttyc0  "/usr/libexec/getty std.38400"  unknown on insecure
    ttyc1   "/usr/libexec/getty std.38400"  unknown on insecure
    ttyc2   "/usr/libexec/getty std.38400"  unknown on insecure
    ...
    ttyc7   "/usr/libexec/getty std.38400"  unknown on insecure
    
  5. ¿·¤·¤¤¥«¡¼¥Í¥ë¤ÇΩ¤Á¾å¤²¤Þ¤¹.

* ¥Ñ¥é¥ì¥ë¥«¡¼¥É

* ¥â¥Ç¥à

* ¥Í¥Ã¥È¥ï¡¼¥¯¥«¡¼¥É

* ¥­¡¼¥Ü¡¼¥É

* ¥Þ¥¦¥¹

* ¤½¤Î¾