Search found 351 matches

by akuyou
Sat Sep 26, 2020 11:50 pm
Forum: Camputers Lynx Assembly Programming
Topic: Video: Lesson P33 - Bitmap Graphics on the Camputers Lynx
Replies: 3
Views: 2466

Re: Video: Lesson P33 - Bitmap Graphics on the Camputers Lynx

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...
by akuyou
Sun Sep 20, 2020 7:22 am
Forum: General Z80 Programming
Topic: How is LDIR affecting memory?
Replies: 3
Views: 265

Re: How is LDIR affecting memory?

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...
by akuyou
Thu Sep 17, 2020 12:16 am
Forum: ARM Assembly Programming
Topic: NDS assembly reading from cartridges
Replies: 3
Views: 276

Re: NDS assembly reading from cartridges

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...
by akuyou
Thu Sep 10, 2020 3:20 am
Forum: Show and Tell
Topic: Play a note!
Replies: 2
Views: 262

Re: Play a note!

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.
by akuyou
Thu Sep 10, 2020 3:16 am
Forum: Introductions
Topic: Hello from Bulgaria!
Replies: 1
Views: 189

Re: Hello from Bulgaria!

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...
by akuyou
Sun Aug 16, 2020 9:48 am
Forum: Introductions
Topic: Hello from a Lynx fan!
Replies: 2
Views: 326

Re: Hello from a Lynx fan!

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...
by akuyou
Sun Aug 09, 2020 6:51 am
Forum: Amstrad CPC Assembly Programming
Topic: Getting started with TRSE
Replies: 1
Views: 362

Re: Getting started with TRSE

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...
by akuyou
Sat Jul 18, 2020 1:09 pm
Forum: MSX & MSX2 Assembly Programming
Topic: Video: Lesson P31 - Hardware Sprites on the MSX1!
Replies: 22
Views: 5644

Re: Video: Lesson P31 - Hardware Sprites on the MSX1!

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.
by akuyou
Wed Jul 15, 2020 9:59 pm
Forum: MSX & MSX2 Assembly Programming
Topic: Video: Lesson P10 - Tilemap graphics on the MSX1
Replies: 5
Views: 3711

Re: Video: Lesson P10 - Tilemap graphics on the MSX1

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.
by akuyou
Wed Jul 15, 2020 3:21 am
Forum: MSX & MSX2 Assembly Programming
Topic: Video: Lesson P31 - Hardware Sprites on the MSX1!
Replies: 22
Views: 5644

Re: Video: Lesson P31 - Hardware Sprites on the MSX1!

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...

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