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+--- Thread: Questions about a 8328-2 board (/thread-797.html)
Questions about a 8328-2 board - smgrieve - 11-05-2024
My board will not select any roms, pad commands all return pad not found. I have replaced IC 31 and 28 with them removed I can select one rom and that one rom will run something seems wrong in the rom section circuit. Also does anyone have the documentation to modify a 8328-2 board for 27128 roms?
RE: Questions about a 8328-2 board - ChickenMan - 11-05-2024
Hi smgrieve and welcome to the forum
It is PAK not PAD to call up the eproms. From the Technical manual page 4-3 it says
4.2. Series III and PC85 Additions.
The Series III and the PC85 core boards also have
extra room for PAK EPROMs, either 8K 2764 or 16K 27128
EPROMS.
Which I read that they already support 27128 eproms. In my PC85 I can take out 2764 and replace it with 27128 with no issue. The earlier Series 3 as indicated above doesnt need any changes to accept 27128 eproms.
Burn out emu_joust_pc85_h.rom (from the software/roms/games folder in the repo) to a 27128 and put in the socket H as below circled in red. Then from Basic, PAK 4 should fire up Emu Joust if it can handle a 27128 eprom.
RE: Questions about a 8328-2 board - smgrieve - 14-05-2024
Unfortunately that didn't work every pak cmd returns, option not fitted. removing IC 31 and IC 28 will make it run as pak 0. PAK keeps getting autocorrected to pad
RE: Questions about a 8328-2 board - ChickenMan - 14-05-2024
Can you post a pic of your coreboard showing the 2 ICs you have removed to get PAK 0 to work, as IC 31 and IC 28 are normally soldered in.