Apple Macintosh portable ROM Expansion pinout |
memory connector |
50 PIN UNKNOWN CONNECTOR
D0-D15Unbuffered data bus, bits 0 through 15 A1-A23Unbuffered 68HC000 address bus, bits 1 through 23 16M16 MHz system clock /EXT.DTACKExternal data transfer acknowledge that disables main system /DTACK. /AS68HC000 Address strobe /DTACKData transfer acknowledge, /DTACK input to 68HC000. /DELAY_CSThis signal is generated by the addressing PAL and is used to put the ROM board into the idle mode by inserting multiple wait states. /ROM_CSPermanent ROM chip select signal. Selects in range $90 0000 through $9F FFFF.
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Pinouts.ru > Memory slots and cards connectors pinouts > Pinout of Apple Macintosh portable ROM Expansion and layout of connector |
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