Labels:and circuit | bulletin board | crt screen | person | sky OCR: MEMW PC /ISA MEMR IOR IOCHRDY IRQ IRQ7 A0 9.' D0 D T JGND 8.9 A1S A16A19 A10 .12 DO D S 74HCTS74 74HCT573 74HCT57- 74HCT651 DO Di J0 CND IOCHRDY IOR I0 MFMR MEMW 1 A10 ..A12 DO DO OE\(ROM) ecoder OFI (EP)ROM 2764 RAM 6264 OE WE OEV E 8.0 GAL 16V8 GAL 16V8 A0 A1S Sync CPU pir GAI. 16V8 IRQ 8.0 1 D0 D 7 RAar ATARI/PBI Phi? MPD ExtSe1 IRQ2 74HCT574 ExtSel