Making a Vic20 Cart
Posted: Thu Feb 02, 2017 4:25 pm
I'm new to EPROM programming and the likes but I did buy some kit about 5 years ago that I rediscovered! I bought a cheap Top 853 EPROM programmer and I have a couple of dead Vic 20 cartridges. They both have ROMs (not EPROMs) inside them (e.g. MOS 901252). I was hoping I could desolder the dead ROM and fit a DIP socket so I could pop in a newly written EPROM (EEPROM?) with a test Vic cartridge image on it.
I have a couple of M27C256B EPROMs (and a UV EPROM eraser). Datasheet http://pdf.datasheetcatalog.com/datashe ... mXvtws.pdf
These have 4 extra pins (2 extra each side) compared to the 901252 cartrige ROM and they are 256k EPROMs. Would it be possible to use these EPROMs (assuming I can patch the pins accordingly) or should I go shopping for an alternative? Any recommendations would be appreciated. I realise the Vic ROMs were only about 4k or so.
Could somebody help me please?
I wouldn't even mind having a go at playing with one of those USB flash burner devices too (if I knew what chip to get) but it would be kinda cool to play with a real EPROM
I have a couple of M27C256B EPROMs (and a UV EPROM eraser). Datasheet http://pdf.datasheetcatalog.com/datashe ... mXvtws.pdf
These have 4 extra pins (2 extra each side) compared to the 901252 cartrige ROM and they are 256k EPROMs. Would it be possible to use these EPROMs (assuming I can patch the pins accordingly) or should I go shopping for an alternative? Any recommendations would be appreciated. I realise the Vic ROMs were only about 4k or so.
Could somebody help me please?
I wouldn't even mind having a go at playing with one of those USB flash burner devices too (if I knew what chip to get) but it would be kinda cool to play with a real EPROM