Search found 220 matches

by akuyou
Sun Oct 13, 2019 11:01 am
Forum: General Z80 Programming
Topic: Z80 Registers
Replies: 2
Views: 8

Re: Z80 Registers

Yes looks pretty good... BC are used as a pair for bytecount (not bit) with LDIR... and on it's own as a loop count with DJNZ the OUT command uses BC (not just C) on some systems - namely the CPC, Spectrum, SAM and Camputers Lynx... it just depends if the way the Z80 is wired... also certain ports c...
by akuyou
Mon Oct 07, 2019 12:42 pm
Forum: General Z80 Programming
Topic: Video: Lesson 2 - Memory copy, Symbol definitions, Loops and Conditional Jumps!
Replies: 3
Views: 1395

Re: Video: Lesson 2 - Memory copy, Symbol definitions, Loops and Conditional Jumps!

Yes, you are correct... LDIR copies from (HL)->(DE), then does INC HL and INC DE, finally DEC BC and repeats until BC=0 if you're using WINAPE, you can put a breakpoint (click on the grey margin - a red blob will appear) on the LDIR command, and watch the registers change (and memory fill) by steppi...
by akuyou
Fri Oct 04, 2019 11:58 am
Forum: Chibi-News!
Topic: ChibiAkumas Live! (Livestreams)
Replies: 0
Views: 227

ChibiAkumas Live! (Livestreams)

ChibiAkumas now has a second Youtube Channel... ChibiAkumas Live! https://www.youtube.com/channel/UCc3e2vxORDpGLmxiej3nzpw This channel will be more casual content, gaming streams, 'Live Programming' and whatever else I can think up... but I'm still going to strive to provide as much information and...
by akuyou
Sat Sep 28, 2019 1:20 pm
Forum: Introductions
Topic: Hello
Replies: 1
Views: 159

Re: Hello

Welcome to the forum! Fascinating to hear that you're coming to the CPC (and others) for reasons other than growing up with them! I don't think we ever really covered assembly at Uni when I did computer science, it was discussed in one lesson, but it was so basic that it was really just mentioned in...
by akuyou
Fri Sep 20, 2019 1:04 am
Forum: Super Nintendo Assembly Programming
Topic: Lesson P27+20 - Sound on the SNES / Super Famicom: the SPC700
Replies: 6
Views: 2700

Re: Lesson P27+20 - Sound on the SNES / Super Famicom: the SPC700

SPC700 debuggers can be found in these emulators. Mesen-S - press ctrl+f. No$sns - press ctrl+t unti you see APU in the bottom right hand corner of the debugger window. bsnes - SMP tab in the debug window. Thanks for the tip... I'll look at Mesen-S as a possible alternative for Snes9x.... unfortuna...
by akuyou
Mon Sep 16, 2019 9:21 pm
Forum: Super Nintendo Assembly Programming
Topic: Lesson P27+20 - Sound on the SNES / Super Famicom: the SPC700
Replies: 6
Views: 2700

Re: Lesson P27+20 - Sound on the SNES / Super Famicom: the SPC700

WLA-DX, bass and Asar assemblers support SPC700 and 65816. Also, there's an SPC700 macro set for CA65. One of the oldest ways was to use Table Assembler with an SPC700 opcode/instruction table which can still be found online. Some of those assemblers use a 6502-like instruction instead of the stand...
by akuyou
Sat Sep 14, 2019 9:22 pm
Forum: Amstrad CPC Assembly Programming
Topic: Video: Setting the CPC screen with CRTC registers - Learn Z80 Lesson P39
Replies: 2
Views: 1630

Re: Video: Setting the CPC screen with CRTC registers - Learn Z80 Lesson P39

Good point on the relevance to the BBC of this topic... I don't have the skill right now on the BBC side to cover this, but I'll be running out of prepared 6502 content soon, so maybe it's something I can start researching.
by akuyou
Mon Sep 02, 2019 9:45 pm
Forum: C64 Assembly Programming
Topic: Lesson P30 - Sound on the C64
Replies: 0
Views: 3456

Lesson P30 - Sound on the C64



http://www.chibiakumas.com/6502/platform3.php#LessonP30

The C64 uses the famous SID sound chip, providing 3 sound channels, and capable of noise, the SID famous for its distinctive sound.
Lets learn out to make sounds on the C64 with the SID!
by akuyou
Mon Sep 02, 2019 9:41 pm
Forum: VIC-20 Assembly Programming
Topic: Lesson P29 - Sound on the on the VIC-20
Replies: 0
Views: 3389

Lesson P29 - Sound on the on the VIC-20



http://www.chibiakumas.com/6502/platform3.php#LessonP29

The Vic 20 has a sound chip with 3 different voice channels, it has a 4th channel capable of noise effects...

Lets learn how to make some simple sounds with the VIC-20!

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