RAM Init Pattern

[groepaz]

darwinNE: could you post the ASSY number? the serial number doesnt really tell anything
ops: you too, please?

interestingly those dumps look totally different to what you get from a c64... vic20 is all SRAM, right?

[DarwinNE]

darwinNE: could you post the ASSY number? the serial number doesnt really tell anything

The problem is that I don't really remember if it's a 250403 or 251037 board. I will check the next time I'll do a complete teardown of the machine.

[srowe]

interestingly those dumps look totally different to what you get from a c64... vic20 is all SRAM, right?

Correct, a few {non CBM} expansion carts use dynamic RAM but all VICs use SRAM.

[groepaz]

I have put the info into the testprogs repo for the time being: https://sourceforge.net/p/vice-emu/code ... itpattern/

It would be great to get some more RAM dumps... and also more examples of programs that rely on uninitialized RAM, so we can find a pattern that works for most (or all) of them.

[chysn]

I have put the info into the testprogs repo for the time being: https://sourceforge.net/p/vice-emu/code ... itpattern/

It would be great to get some more RAM dumps... and also more examples of programs that rely on uninitialized RAM, so we can find a pattern that works for most (or all) of them.

I just saved one on my CR NTSC VIC-20 (unexpanded). How do I get this to you? Edit: I'll ZIP it up and post it here in a minute.