ChibiAkumas ASM Programming Forum

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...

Yes, that all looks correct to me!

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...

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...

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...

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...

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...

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.

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!

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!