Denial

I would recommend 6502bench SourceGen as a disassembler. You can work with it interactively to help with the distinction between code and data. It provides automatic labelling of subroutine calls, jumps and branches. It also allows you to add comments and notes which I found particularly useful. I s...

If you should need to know about page boundary crossings, you can enable the options setting and then use the 'warning on|off' directive to enable the messages in the critical code. However, please note that all warnings are enabled/disabled by the directive.

Report Page Boundary Crossing is an Assembler option found in Tools/Options/Assembler. Uncheck the option and the warnings will no longer appear. The warnings are just information, not errors. In the absence of any true errors, the assembly will complete.

CBM prg Studio can produce the BASIC stub for you. Position the cursor just before your start address and select Tools/Generate Sys() Call from the menu bar. Then enter your code start address and OK the dialogue and hey presto the stub appears at the cursor position.

MartinC wrote: ↑Tue Nov 22, 2022 11:05 am Hi Thegg,

Progress at last!

Great. I'm glad you have got there. Understanding the memory map and planning accordingly is a good way to go.

I look forward to seeing your first finished project.

A couple of small points. There is not enough room between the end of your Basic stub and the start of your code for the screen and colour data. So your code will be assembled on top of the last few bytes of your screen data. You are including 65 character definitions (0-64) so the last definition i...

Your code is loading the address from a memory location ie $1436, $1437,$1435,$1434 whereas my suggestion is loading the immediate low and high values of the screen map and video matrix. In actual fact I was wrong to say your code will not work. Looking closer it will, it is just less clear what is ...

I think your main problem is that you are not loading the zero page pointers with the addresses you think you are. Try changing your code to: Lda #<scrn Sta $fb Lda #>scrn Sta $fc Lda #<scrmap Sta $fd Lda #>scrmap Sta $fe The construct you trying does not work in CBM Prg. Alternatively, you could us...

If you need some extra motivation, I (and I am sure quite a few others) would be very interested in such a library.

Thanks for the comment. I'll look out for the review.

Although chysn correctly says that 'you never need recursion', I find that recursion does have a certain elegance and often provides a smaller code footprint. It can also be implemented in 6502 Assembler. Recursion on a 6502 CPU is constrained by a small system stack. As Mike outlines above, this co...

I've never got on very well with text adventures in the past, but I thought I would give this one a try. I was getting into and enjoying the game when I hit a problem. I was on the prompt line and accidently hit backspace before starting to type my command. The backspace had moved the cursor to the ...

Neat game, fun to play. Challenging. Thanks. The keyboard controls stung me a few times. I was figuring stuff out, making progress, and then pressed S instead of E or D! During the development of the game, S was used to select a tile and the menu options were selected by using CTRL and option lette...

Great game. Very challenging. Harder than I had first expected, even in the Easy level :) . I like its randomness very much. Just tried in my actal (PAL) VIC and works perfectly OK. Glad you are enjoying the game. When I put it together it was clear that it would be an 'occasional dip in game' rath...

Cool game. It's nice to play something mindbending. A very pleasant diversion! :) Thank you very much. I get my pleasure from putting together programs that interest me, which I am only too happy to share. However, it is really gratifying to hear that the program has entertained someone else as well.