DivMMC Enjoy joystick fault
Posted: Mon Feb 05, 2024 6:29 pm
Hi all
I have a standard Zx Spectrum 48k issue 4S running a DivMMC Enjoy, 2014 Version with Esxdos .085, both working fine until recently, then the spectrum would just randomly crash while playing a game, any game, usually goes back to Sinclair Research (Blah). Press the NMI button, and it would go to menu and just reload and carry on.
Switched the Spectrum on the other day, It just displays flashing coloured squares, this with the DivMMC plugged in, turned off, unplugged the DivMMC, spectrum works fine, tried the interface with another working Spectrum, same flashing coloured squares.
Now for the techie bit, I have checked the eprom with my programmer, and the code verifies with esxdos’s .BIN file.
I decided to pull out the GAL 22V10 chip, (which I believe to be the joystick interface logic), the Spectrum boots into esxdos and loads perfectly every time, and doesn’t crash, but I have no joystick interface.
I have bought a new GAL 22V10 chip, but it is blank, question is, where can I get the code from to program it? As I have trawled the internet.
Hope someone can help.
I have a standard Zx Spectrum 48k issue 4S running a DivMMC Enjoy, 2014 Version with Esxdos .085, both working fine until recently, then the spectrum would just randomly crash while playing a game, any game, usually goes back to Sinclair Research (Blah). Press the NMI button, and it would go to menu and just reload and carry on.
Switched the Spectrum on the other day, It just displays flashing coloured squares, this with the DivMMC plugged in, turned off, unplugged the DivMMC, spectrum works fine, tried the interface with another working Spectrum, same flashing coloured squares.
Now for the techie bit, I have checked the eprom with my programmer, and the code verifies with esxdos’s .BIN file.
I decided to pull out the GAL 22V10 chip, (which I believe to be the joystick interface logic), the Spectrum boots into esxdos and loads perfectly every time, and doesn’t crash, but I have no joystick interface.
I have bought a new GAL 22V10 chip, but it is blank, question is, where can I get the code from to program it? As I have trawled the internet.
Hope someone can help.