Search found 319 matches

by @username@
Tue Mar 28, 2023 11:46 pm
Forum: Software
Topic: Cartridge ROM mapping
Replies: 77
Views: 10848

Re: Cartridge ROM mapping

Attached is BASIC83B with the entire CVDEMO tape included, in both flat and AB images.

Use CLOAD or CRUN to load from the now free ROM space.

Enjoy!
by @username@
Tue Mar 28, 2023 9:35 pm
Forum: Software
Topic: Cartridge ROM mapping
Replies: 77
Views: 10848

Re: Cartridge ROM mapping

The ROM is not patched as such, only when it's injected into the image.
by @username@
Tue Mar 28, 2023 11:30 am
Forum: Software
Topic: Cartridge ROM mapping
Replies: 77
Views: 10848

Re: Cartridge ROM mapping

ROM image creator.

Knocked up in lunch break - so let me know if you hit any issues.

I took the executive decision to fix the byte at $7223 for BASIC - saves writing and having a panic attack :lol:

Good luck!
by @username@
Mon Mar 27, 2023 10:15 pm
Forum: Software
Topic: Cartridge ROM mapping
Replies: 77
Views: 10848

Re: Cartridge ROM mapping

The ROMs and subsequent images are really straight forward. The Multicart is just a sliding 32K window - hence the 32K images. Each 32K image is arranged as two 16K blocks - ar$e backwards - so high memory first. This gives you, in 4K blocks $8000 $9000 $A000 $B000 $4000 $5000 $6000 $7000 So - take ...
by @username@
Mon Mar 27, 2023 7:36 pm
Forum: Software
Topic: Cartridge ROM mapping
Replies: 77
Views: 10848

Re: Cartridge ROM mapping

The "mirroring" is an artefact of missing address lines, nothing more. The console is just reporting what it sees, as without the required address lines, you'll just wrap to what's actually connected. This is great news as it means folks with any multicart can start thinking of how to practically us...
by @username@
Mon Mar 27, 2023 3:02 pm
Forum: Software
Topic: Cartridge ROM mapping
Replies: 77
Views: 10848

Re: Cartridge ROM mapping

OK - here's a little test utility. There are two styles in the zip, flat memory $4000->$C000 and romb $8000->$C000 + $4000-$8000. Hopefully the second one should give what you expect. Basically each 2K page has a valid program with the address to check in each. They should be inline, so $4000 == $40...
by @username@
Sun Mar 26, 2023 3:24 pm
Forum: Software
Topic: Cartridge ROM mapping
Replies: 77
Views: 10848

Re: Cartridge ROM mapping

To overcome the lack of RAM - both HAPMON and the Shop advert thing had an EEPROM at $4000.
by @username@
Sun Mar 26, 2023 3:24 pm
Forum: Software
Topic: Cartridge ROM mapping
Replies: 77
Views: 10848

Re: Cartridge ROM mapping

The diagnostic image would be something like a flat 32K which has a page aware program on each page - so it knows if it's at the right place and can check that the other pages are coming up with the correct memory location - as that appears to have been the initial issue here. It's just to eradicate...
by @username@
Sun Mar 26, 2023 2:46 pm
Forum: Software
Topic: Cartridge ROM mapping
Replies: 77
Views: 10848

Re: Cartridge ROM mapping

OK - so it doesn't exist - which is my point. Assuming kevgal is up for it - I believe it's time to kill off this insane hall of mirrors forever. All it does is add another level of complexity which is not needed. How about we look at knocking up a diagnostic image for the hardware - just to ensure ...
by @username@
Sun Mar 26, 2023 2:21 pm
Forum: Software
Topic: Cartridge ROM mapping
Replies: 77
Views: 10848

Re: Cartridge ROM mapping

Sorry - I call bullshit on that one.

Please look at your chart again and explain why only the 6K ROM has the wrong memory addresses swapped.

Tell me the name of the 6K ROM you think can be cut up this way and still work.