Отправлено Алексей Мусин 04 декабря 2002 г. 12:43 В ответ на: Не могёт такого быть. отправлено -=Shura=- 04 декабря 2002 г. 10:59

что в упомянутой мной книге есть фраза о том, что ISA так и не дожила до стандартизации, в отличие от других системных шин (VESA, PCI, ...).

А вот что написано в стандарте на PC-104 (заметьте, нет ссылки на стандарт ISA!)

3. ELECTRICAL SPECIFICATIONS
3.1 Signal Functions and Assignments
3.1.1 Signal Definitions
All PC/104 bus signals are identical in definition and function to their ISA counterparts.
3.1.2 Signal Assignments
Signals are assigned in the same order as on the edgecard connectors of ISA, but
transformed to the corresponding header connector pins. Signal assignments for the
J1/P1 and J2/P2 connectors are given in Appendix B.
3.1.3 Added Grounds
Several ground pins have been added, to maximize bus integrity. See Appendix B.
3.1.4 Key Locations
Key locations - consisting of omitted pins on P1 and P2, and plugged holes on J1 and J2 -
have been designated on each bus connector, to help assure proper connector mating. See
Appendix B.
3.2 AC Signal Timing
All PC/104 bus signals are identical in signal timing to their ISA counterparts.
3.3 DC Signal Levels
All PC/104 bus signal DC logic high and logic low voltage levels are identical to their ISA
counterparts.