ChibiAkumas ASM Programming Forum

Unfortunately, I've been told my Grime Z80 doesn't actually work on the real 'Camputers lynx' - it exhibits graphical glitches that do not occur on the emulator. I don't have real hardware so I don't know how to fix the issue - I think it may be because I'm writing out of Vblank, but not doing so wo...

Hey there! thanks for the question! I think you've slightly misread the cheatsheet (unless there's a misprint version out there) The first line should be: LD (DE),(HL) Notice the brackets ()? HL means the value in HL (HL) means the byte at address HL so "LD (DE),(HL)" copies one byte from address HL...

I'm afraid I'm heavily relying on the GBATek documentation to write the tutorials as well, and the truth is I'm not sure. I would assume you're correct, it seems the data is being transferred from ROM to the specified location in RAM, but I don't know any more than that. I'd like to look further int...

Great work! you've made progress pretty quick... it took me quite a while to get any sound out of the C64 too - it takes time to get started on these things!

that LSA macro is a good idea! I'm sure it'll save a lot of time.

Welcome to the forum!... So you're looking at the C64 eh? Amazing to hear considering it's so 'before your time' (I don't mean that in a bad way) So was it the demos that brought you to such an old machine? and the C64 in particular? I have to admit, even as a Z80/CPC fan... the C64 demos are mighty...

I'm hoping that if you cover the 6502 and my Lynx tutorials that should be enough!... of course you should definitely try looking else where, as other people may do a better job of explaining things, or their style may suit you better. My tutorials only cover the basics, so you may need to look else...

Well, as you say, the Firmware guide is the must for CPC ASM: (unfortunately I didn't have it in the 80's) http://www.cpcwiki.eu/imgs/0/02/CPC_firmware.pdf Apart from that there's two sites I used when writing ChibiAkumas CPCWiki has lots of great resources: http://www.cpcwiki.eu/index.php/Source_Co...

I believe your theory is sound.

The question is, can you code it up and make it work in a game? ... I look forward to seeing your project.

I added a function to covert the sprites to Foreground background colors - when the line is all one color, it's setting the line to all zero pixels in the bitmap data - and applying the color in the colormap.

I've altered the code for this instance, please try again with this test copy.

Yes, you are correct - I'm pretty sure there's no way around it. Any tile that can scroll between all 3 'areas' would have to be defined in all 3 (presumably with the same tile number) I'm not sure where that leave vertical scrolling on the MSX... Unless you have some clever ideas to exploit this (l...