Denial

Looking great - very smooth.

I pressed the L key and it locked up, perhaps that's normal.

Vice 3.1 snapshot attached anyway.

I had a similar issue when developing Popeye. It would sometimes get stuck. In the end I reorganised the memory map to put all writeable values on a single data segment then set up vice watches to alert if writing outside of that segment. I also set up an auto play mode with infinite lives. Then I s...

As a teenager I had Jelly Monsters and Super-Lander.

I too had to have the original cartridge even though I have them on the mega-cart, just for the box, artwork and smell.

Thanks, I'm going to try it out.

I have a few Vic-20s and will keep most with the blurry "period-correct" look, but will try this on one of them for sure.

looks good!

Nice idea.

Might be useful to also have pages with grids for designing user-defined-characters and screen layouts?

Good idea about the cart extender. I don't have one so I'll have to see if any are listed on ebay or find if anyone is producing contemporary versions. My VIC-Rabbit has a "passthru" cart connector, so I'll play with that too, see if it helps. If you can't get any joy with the "VIC-R...

I believe you should be able to prevent it from AutoStarting by using a cartridge port extender that allows you to turn it off? Then you could try switching it in and running the program again?

fair enough, only skipped through.

You can try unzipping and running the attached mega-cart repair program on the Vic. Can't remember where I got it, but it has rescued mine a couple of times.

Try to... How to clear preferences and restore default factory settings In case of a problem, or you if you simply want to delete your settings quickly, it is possible to clear all preferences and restore the Mega-Cart to default factory settings. Please remember that the preferences contain such se...

Just a suggestion but it would be nice to have this project re-platformed into an online offering rather than something you have to download and install on a Windows only machine. I took a look at it once and easily generated a web front-end in ASP.net by converting the access database to SQL. It co...

GPT 4 Can you generate vic 20 6502 assembler code for a raster split where the screen background colour is changed half way down. Output code only in a single block. ; Constants RSEL = $9003 IRQEN = $912D IRQRST = $912F IRQVEC = $314 ; Variables in zero page handler = $FB ; $FB/$FC is unused by BAS...

GPT 4 Can you show me how to multiply two eight-bit numbers in 6502 assembly language? Output code only in a single block ; Variables in zero page A = $00 B = $01 C_low = $02 C_high = $03 counter = $04 LDA #$00 STA C_low STA C_high LDA B STA counter mult_loop: LDA C_low CLC ADC A STA C_low LDA C_hi...

GPT-4 Can you show me how to add two sixteen-bit numbers in 6502 assembly language? Certainly! Adding two 16-bit numbers in 6502 assembly language involves a process called "16-bit addition with carry." You'll need to split each 16-bit number into two 8-bit numbers (low byte and high byte...

I've never Spectar before - looks quite good.

On a related side note: It's funny how game programmers of the era thought that an ascending/descending frequency-sweep was a cool sound effect. Seems something particularly prevalent on the Vic.