Цитата Сообщение от spensor
Согласен. Но, думаю в ВГ93 ошибки нет, если конечно правда то, что говорит Sonic. Но вот найти схем контроллеров дисководов MSX не удалось.
Про чтение дорожки на MSX (внимательно прочитайте подчеркнутое):
Read Track
Upon receipt of the Read Track command, the head is loaded, and the busy status bit is set. Reading starts with the leading edge of the first encountered index pulse and continues until the next index pulse. All gap, header, and data bytes are assembled and transferred to the data register and DRQ's are generated for each byte. The accumulation of bytes is synchronized to each address mark encountered. An interrupt is generated at the completion of the command. The ID Address Mark, ID field, ID CRC bytes, DAM, Data and Data CRC bytes for each sector will be correct. The gap bytes may be read incorrectly during write-splice time because of synchronization.

Источник:
http://www.work.de/nocash/portar.htm#fdcdescription