Denial

Edit: yes, it seems the ATF1504ASV (which is the 3.3v variant?) has a different ID to the ATF1504AS (5v variant). Yes, indeed. I've had both the 3.3V and the 5V variant on the cartridges that I built and patched. The resulting SVF files differed in the device id, only. I'll attach both files here i...

This week, I modified tokra's Final Expansion cartridge in the same way as described above. dllhost_wQUI5d2HTZ.png He was using it on his NTSC VIC-20 and has reported RAM issues before. See here, for example: http://sleepingelephant.com/ipw-web/bulletin/bb/viewtopic.php?p=75976#p75976 http://sleepin...

I can indeed confirm that the modified FE3 cartridge is now working flawlessly (RAM-Check, Doom, and all) on both of my PAL VIC-20. Including the one that was producing the cross-talk issues described above! For those who'd like to play along, here's what I did: 1. Solder a bodge wire between pin 17...

Jim Brain's modding instructions that you followed were mostly a shot in the dark, at a time where the reasons for that behaviour were not yet clearly understood. I suspected as much, so I wasn't too surprised when it didn't work. But it didn't take much effort, so I thought I'd give it a try. The ...

https://sleepingelephant.com/ipw-web/bulletin/bb/viewtopic.php?t=7620&start=62 dload crosstalk.,prg from the other thread turn on FE3 and select max memory run prg verify errors occur take out cart find CR/W pin Look where trace goes to Atmel CPLD Find VR/W pin See if there is a nice way or inc...