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Graphics Interchange Format  |  1997-12-10  |  4.3 KB  |  344x324  |  1-bit (2 colors)  |  [GIFf/JVWR]
   ocr: Pin Number Signal Name Signal Descmpton 1 +5V Vcc 2-24 A1-23 Unburtered DOHCUUU address signals A1-23 25-26 GND Logic Ground 27 DTACK DTACK input to 0OHCUUU 28 TAS 68HC000 address strobe signal 29 ROM_CS Permanent ROM chip select signal. Selects in range $90 L 0000 through $9F FFFF. 30 16 Mhz clock 16 Mhz system clock. 31 EXIDIACK Extemal DTACK signal that iisables man system DTACK 32 DELAY_CS This signal is generated by the addressing PAL and is used to put the ROM board into the idle mode by inserting multiple wait states. 33-48 DO-15 68HCUUU unburrered data signals DO-15 49-50 +5V Vcc