| PACMAN HARDWARE |
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| Both Pacman and Ms Pacman share a common Z-80 based main board. It uses 2532 EEPROMs to store program code. 2114s serve as Color, Video and Scratchpad RAM. The board also utilizes 7489s and 8125s for other RAM based fuctions. This board design is unique in that it uses an onboard Power Supply. Low level AC (7V and 16V) is fed derectly onto the board. The Power Supply (upper left corner) rectifies and filters this into DC (+5V for logic circuits and +14V for sound circuits) |
| Ms Pacman auxiillary PCB. Plugging this into the Z-80 CPU socket on the main board and changing the character ROMs at 5E and 5F will allow the board to run Ms. Pacman. |
| VRAM Addresser (NVC284) PCB. This board handles many of the timing signals for the Pacman main board. If the pins on this board are not securely plugged (often times they aren't) the game may exhibit many different graphics problems. |
| Z-80 Sync Buss Controller (NVC285) PCB. This board interfaces the Z-80 CPU to the boards Data Bus. Bad connections on this board have been known prevent the game from running correctly or at all. |
| These two boards were originally produced as custom made chips but were manufactured as seperate boards because the originals became expensive to produce. The board version of each of these is identical in function to its IC counterpart. Most Pacman and Ms Pacman PCBs have the board version but some of the older ones may contain the IC versions. |
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