Denial

Have you thought about adding the ability to chain files from disk- to allow assembly of much larger programs? That should already be possible with one of the established methods to chain programs from CBM BASIC, as wAx2 'merely' operates as BASIC extension. Eventually you will need to propagate th...

Please check out https://www.zimmers.net/anonftp/pub/cbm/firmware/misc/vc-20diag / vc-20-diag.zip , the file 'cart-pcb.jpg' in particular. The diagnostic cartridge requires RAM in RAM1 ($0400..$07FF) for own workspace variables. What is used as carrier is the same PCB that is otherwise used for the ...

I love it! And so educational! Can't wait to impress my friends with my new pancake flipping skills :) "Misusing" the display routine for animation purposes should have been quite obvious - I wonder why noone else came up earlier with this. Are people just so reluctant to try out things? ...

Name: MG ANIMATOR Author: Mike Released: May 20th, 2024 Requirements: VIC-20 with +35K RAM expansion, disk drive Description: framework demonstrator for high resolution full screen animations Screenshot: https://dateipfa.de/.Public/denial/images/demos/pancake.png Download: pancake.zip Read more and ...

The picture size of 320x200 pixels is sufficient to store 12 frames with 80x64 pixels each. This key idea leads to another application for the display routine - an animation with 12 frames: ( download ). If you ever wanted to know how to flip pancakes properly, here are the instructions. :wink: As w...

Marsupial wrote:The diagnostic still reports a bad checksum... How can that be?

That shouldn't be.

Maybe there is an error in the checksumming code of the diagnostics, like out-of-bounds accesses. You should put an inquiry to nbla000 in the corresponding thread.

This bodge wire is ex factory and connects the cartridge port pin Y to the audio amplifier on the first revision of the CR board. It is officially documented in the Technical Manual, page 22: https://dateipfa.de/.Public/denial/images/schematics/Audio_In_Pin_Y.jpg Later revisions of the CR board inco...

https://sleepingelephant.com/ipw-web/bulletin/bb/viewtopic.php?t=10999&start=5 Footnote: MrSterling I follow your struggles with Vector graphics with intense interest. I don't contribute to your threads because I don't know enough to make a real sensible contribution, but I think like myself ma...

I currently run the motherboard with a clipped bodgewire until I find where the issue is, but running the same poke-peek command still returns 0. Not sure what that does tell me... It IS supposed to return 0 on a working machine! Would there have been mirroring by VA11 stuck-at-0 - the way I presum...

Great!

the Poke-peek returns 0. does that mean the mirroring fails? or that it is impossible to get it to something else than 0 (and why it isn't changing to upper/lower) You should be rather glad the sequence returns 0 - you do not want any mirroring here. The check was supposed to find out whether the p...

That had been discussed in the thread " New penultimate-plus-2-cartridge " some time ago already. The PU+2 does do no magic here though: it merely inspects the load address of the file (and tries) to config the RAM from that: unexpanded RAM with $1001, +3K RAM expansion for $0401, full RAM...

I assume you've isolated the keyboard as a cause by trying to switch by software? The diag test in the OP already fails to activate the lower/upper-case character set, which it quite surely does not do with a simulated key press of Shift + C=, but with a POKE to 36869. Very likely something on the ...

You should check whether VA11 on the mainboard is stuck-at-0.

Here is the draft of the first hardware design, should anyone want to replicate the prototype cartridge shown in the introductory post of the thread using a VIC-1210 +3K RAM expansion as carrier: 2716 +----\/----+ 1 -|A7 Vcc|- 24 2 -|A6 A8|- 23 3 -|A5 A9|- 22 4 -|A4 Vpp|- 21 5 -|A3 /OE|- 20 6 -|A2 A...