11-05-2024, 11:07 AM
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.
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.
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ChickenMan
ChickenMan