Denial

[...] the next task is to create a PCB that brings all the components onto one board (previously, I had an off-the-shelf FPGA development board with an interface card plugged into it). [...] In the commentary to your latest YT video, you write "[...] on one PCB. It'll be a bit of a chunky beas...

Sorry, I didn't quite understand what VFLI use-case would not be achievable from your explanation. An associated BASIC extension would possibly want to retrieve the physical colour from a pixel akin to the @() function of MINIGRAFIK which does that for the logical colours. This is an operation you ...

Is that a deal breaker? For me, yes. I write programs for the VIC-20 that do not just trivially use the whole-file load and save operations of the KERNAL. Seems the device fulfils the requirements of the OP and much more e.g. HDMI support. The OP asked for something that acts like a floppy drive. B...

Take a look at SideKick64 [...] To quote from the READ ME: Drive emulation The Sidekick20 emulates LOAD and SAVE via kernal vectors, i.e. single-file programs and programs that use kernal routines LOAD/SAVE only work fine (for other programs use a real drive, Pi1541 or SD2IEC). The drive emulation ...

Not yet, unfortunately. The idea had been discussed in several threads here in Denial, starting with a proposal by TLovskog in 2011 for his GCart. It never happened. Some posts that round up things as of today: My hardware project :: GCart 2011 Ultimem or Final Expansion? Banked RAM cart ... In shor...

Ultimem would fit the bill in a similar fashion. Jim is located in the US, and I've heard rumours that Jim plans for a new batch. Having, say, 8 sets of data for each half of BLK5 could be emulated (albeit somewhat wasteful) by providing 8² = 64 copies of the whole 8K range. 3 bits of the relevant ...

The scroll down routine not only scrolls down from a given line, it opens a new physical line for the current logical line (unless the maximum of 4 physical lines for one logical line has been reached). In the case at hand, and as a side effect, it combines the two top physical lines into one logica...

You would need to provide an executable (not just source code) of this test program and the exact course of actions up to the point where you think the routine deviates from expected behaviour for me (or anyone else) to follow through. The KERNAL retains any existing linking of physical lines into l...

What is the reason for this [...] $E975 scrolls up logical lines . This is done by the screen editor to ensure no remnants of, respectively, incomplete logical lines are there at the top of the screen when, for example, BASIC programs are listed. With the start-up message on screen, the overflowing...

[...] It is somewhat frustrating to install this thread just to see Marko's outdated method being resurrected. :( Edit : to explain, and for posteriority - MrSterlingBS originally wrote his post above into the topic '** Stable rasters on the VIC-20' which has me as OP. I had started that other topi...

Moderation notice: please check out the thread "WIP: X PANDER ViC" in the Hardware and Tech section.

Greetings,

Michael

The cartridge init code needs to setup the VIAs properly so that interrupts work at all. Changing the vector at $0314 is just boilerplate.

Please check out the discussion in the thread "Cartridge Auto Start Tips?".

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? ...