Denial

Is it too soon for this to be funny?

I went through my box of Vic-20 cart PCBs tonight and confirmed / added additional MOS Rom numbers to this listing: MOS ROM Number Cartridge Name Cart ID ------------------------------------------------------------------------ 325315-01 Programmers Aid Cartridge Vic-1212 325316-01 Machine Language M...

By the way the dates codes on your cartridges both look to be later than the one advertised. Forever the optimist! :lol: Only the MOS mask ROM chip # is relevant. MOS 325337-01 is Scott Adams Adventure #3 - Mission Impossible MOS 325339-01 is Scott Adams Adventure #5 - The Count I have tested about...

nbla000 wrote:....i'm adding ITS support to my cbm-filebrowser, at the moment it is in beta but i'm able to load any tap file for c16, c128, c64 and vic-20+mega-cart, I'm working for other vic-20 configuration and I will publish the new version soon.

Cool!!!

The ROM chip reads: MOS 325338-01 8-43 3142 At least the 325338-01 puts it somewhere in the range of other ROMs for VIC-20 cartridges (I checked against a MOS chip list). The other figures form no discernible date code, though. In any case, the solder blobs put the ROM into BLK2 and BLK3, so this c...

brain wrote:Is there a link for the the final version's schematic?

Sorry, no.

Try swapping 6522 chip

If you need to purchase, WDC 65C02 is better choice.
It runs much cooler & consumes less power than original MOS6502

The character generator in the VIC-20 actually contains 512 characters. You can toggle between the two 256 chars banks using SHIFT-(Commodore key). Altough this specific key combination does not work with the Data-20 display adapter, you can use the standard CHR$(14) and (I don't remember the way b...

Actually, all firmware on the board has a hardware level copy protection, including the autostart code ROM. Its kinda dumb to protect the code portion as it can easily be copied using software. Its as if the pinout of the ROM chips isn't standard. This didn't make any sense to me at all. So, this m...

Is there copy protection or simply code to set up registers of 6845?

eslapion wrote: There are hundreds of different brands of 8k x 8 static RAM which will do the job.

If anyone is looking for 8K SRAM chips, send me a PM.

This was a really nice project and a great addition for the Vic-20 community.

Job well done!!!

orion70 wrote:Sorry to revive this old thread - is it only me, or the site is down? TIA

Dynamic address changed, updated DNS, and site is accessible again.

I have found best uIEC support using Vic-20 is with MegaCart using Easyload & SJLoad patch to enable jiffy dos equivalent speed transfers to/from SD card.