MCUmall EPROM BIOS Chip Burner Forum
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 True USB Willem Programmer (GQ-2X, GQ-3X, GQ-4X)
 Old GQ-2X and 27c322 question
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Posted - 06/03/2015 :  22:48:25  Show Profile  Reply with Quote

Ok, so I've got this old GQ-2X programmer. I've managed to get myself an adapter board for 27C322 chips.

When I use my multimeter to map out A18 A19 and A20 (just to be sure) I find that A18 and A19 is connected together on the programmer. This surely shouldn't be the case??

The Rom I'm creating is holding several smaller roms, and I'm going to be switching between them by using the upper A-lines.

Problem is that some parts of the rom works, guessing there must something with the programmer and the A18 and A19 lines.

Has anyone experienced something like this, and maybe there is an easy fix?

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