November 2, 2026 at 2:32 PM
I love optimizing z80, squeezing every last cycle out of a routine. Writing the whole program in z80 is less fun than it used to be in the 80s
November 2, 2026 at 1:05 PM
I love optimizing z80, squeezing every last cycle out of a routine. Writing the whole program in z80 is less fun than it used to be in the 80s
Z80 under the hood on most of those.
November 2, 2026 at 10:56 PM
Z80 under the hood on most of those.
Fixed a couple of known issues in the visual-cpu-remix simulators, the update should also fix the text quality problems with fractional scaling on high-dpi displays.
Z80: floooh.github.io/visualz80rem...
6502: floooh.github.io/visual6502re...
2A03: floooh.github.io/visual2a03re...
Z80: floooh.github.io/visualz80rem...
6502: floooh.github.io/visual6502re...
2A03: floooh.github.io/visual2a03re...
November 2, 2026 at 12:10 PM
Fixed a couple of known issues in the visual-cpu-remix simulators, the update should also fix the text quality problems with fractional scaling on high-dpi displays.
Z80: floooh.github.io/visualz80rem...
6502: floooh.github.io/visual6502re...
2A03: floooh.github.io/visual2a03re...
Z80: floooh.github.io/visualz80rem...
6502: floooh.github.io/visual6502re...
2A03: floooh.github.io/visual2a03re...
If you were a bedroom coder in 1983, your entire software development toolkit consisted of a ZX Spectrum, a cassette deck, and a magazine with a list of Z80 opcodes in the back. Most of those games worked. The ones that didn't, you debugged by staring at the screen until your eyes hurt.
November 3, 2026 at 2:00 PM
If you were a bedroom coder in 1983, your entire software development toolkit consisted of a ZX Spectrum, a cassette deck, and a magazine with a list of Z80 opcodes in the back. Most of those games worked. The ones that didn't, you debugged by staring at the screen until your eyes hurt.
Back to making pyon adventure~
You can now write and execute assembly on my stream :3
Join me !! www.twitch.tv/astatinchan/
#vtuber #twitch #stream #gameboy #gamedev #gameboydev #retrocomputing #assembly #Z80 #happyBunny
You can now write and execute assembly on my stream :3
Join me !! www.twitch.tv/astatinchan/
#vtuber #twitch #stream #gameboy #gamedev #gameboydev #retrocomputing #assembly #Z80 #happyBunny
AstatinChan - Live on Twitch
Gameboy ASM - Dialogue writing while chat also writes assembly :3 | Streaming software and game development.
www.twitch.tv
November 3, 2026 at 1:29 PM
Back to making pyon adventure~
You can now write and execute assembly on my stream :3
Join me !! www.twitch.tv/astatinchan/
#vtuber #twitch #stream #gameboy #gamedev #gameboydev #retrocomputing #assembly #Z80 #happyBunny
You can now write and execute assembly on my stream :3
Join me !! www.twitch.tv/astatinchan/
#vtuber #twitch #stream #gameboy #gamedev #gameboydev #retrocomputing #assembly #Z80 #happyBunny
Just because I’m working on GB Tetris to run on other Z80 machines.
November 1, 2026 at 4:36 PM
Just because I’m working on GB Tetris to run on other Z80 machines.
Machine Code Mayhem: Writing ZX Spectrum Games in Z80 Assembly, from Six Complete Games by Daniel Vaughan is a new release on Leanpub!
Learn Z80 assembly and ZX Spectrum game development by taking six complete, original 128K games apart line by line: the … leanpub.com/machinecodem...
Learn Z80 assembly and ZX Spectrum game development by taking six complete, original 128K games apart line by line: the … leanpub.com/machinecodem...
November 2, 2026 at 12:15 AM
Machine Code Mayhem: Writing ZX Spectrum Games in Z80 Assembly, from Six Complete Games by Daniel Vaughan is a new release on Leanpub!
Learn Z80 assembly and ZX Spectrum game development by taking six complete, original 128K games apart line by line: the … leanpub.com/machinecodem...
Learn Z80 assembly and ZX Spectrum game development by taking six complete, original 128K games apart line by line: the … leanpub.com/machinecodem...
Oh, Lordt.
Now I'm watching videos on Z80 and CPUs.
My partner put in his ear buds because we stayed up watching Heroes, and he said he's too tired for this 😂
Now I'm watching videos on Z80 and CPUs.
My partner put in his ear buds because we stayed up watching Heroes, and he said he's too tired for this 😂
November 1, 2026 at 12:30 AM
Oh, Lordt.
Now I'm watching videos on Z80 and CPUs.
My partner put in his ear buds because we stayed up watching Heroes, and he said he's too tired for this 😂
Now I'm watching videos on Z80 and CPUs.
My partner put in his ear buds because we stayed up watching Heroes, and he said he's too tired for this 😂
6 cycles per pixel.. hm. :) I wonder if that could work on z80?
Here's the repo for an image compression format that can be decoded at extremely high speed, even race the beam on an RP2350 microcontroller: github.com/raphlinus/ni...
GitHub - raphlinus/nibnib: Image compression at 4bpp with extreme decompression speed
Image compression at 4bpp with extreme decompression speed - raphlinus/nibnib
github.com
October 30, 2026 at 6:09 AM
6 cycles per pixel.. hm. :) I wonder if that could work on z80?
Zachtronics just just straight up teaching kids how to write Assembly with TIS-100. When I was a kid I printed off the manual on the school printers. That knowledge did translate over to Z80 assembly.
November 2, 2026 at 3:57 PM
Zachtronics just just straight up teaching kids how to write Assembly with TIS-100. When I was a kid I printed off the manual on the school printers. That knowledge did translate over to Z80 assembly.
If you love the Z80, the Genesis sneaks one in too: it's the sound CPU that drives the YM2612 and the PSG. So that one could count! Fair warning though, the retro hardware rabbit hole has no bottom.
November 1, 2026 at 10:02 AM
If you love the Z80, the Genesis sneaks one in too: it's the sound CPU that drives the YM2612 and the PSG. So that one could count! Fair warning though, the retro hardware rabbit hole has no bottom.
I sometimes wonder where I would be in life if I had chosen Z80 over MOS6510.
November 1, 2026 at 2:25 PM
I sometimes wonder where I would be in life if I had chosen Z80 over MOS6510.
Ahh the memories. Running CP/M on Z80 board inside an Apple IIe clone.
October 30, 2026 at 11:43 PM
Ahh the memories. Running CP/M on Z80 board inside an Apple IIe clone.
✅ ⌘ Apple IIe Computer Z80 CP/M Card , Tested Working #ad
✅ ⌘ Apple IIe Computer Z80 CP/M Card , Tested Working
Phoenix, Arizona
www.ebay.com
November 1, 2026 at 6:20 PM
✅ ⌘ Apple IIe Computer Z80 CP/M Card , Tested Working #ad
Why is Z80 still relevant?
November 1, 2026 at 12:52 AM
Why is Z80 still relevant?
I’ve never seen a SAM before. Good lord she’s gorgeous, z80 powered too!
November 3, 2026 at 8:38 AM
I’ve never seen a SAM before. Good lord she’s gorgeous, z80 powered too!
こないだ書いたＣＰＵ識別のやつ、もっとコンパクトに出来た。
0100 EB,03 ←8086だと0105に飛ぶ、Z80は素通り
0102 C3 00 02 ←Z80は0200に飛ぶ
0105 ～8086のコードを置く
要は２バイト目のコードがZ80でどういう意味になるのかで飛び先が変わるんだけど、まぁ実用性は・・・。
0100 EB,03 ←8086だと0105に飛ぶ、Z80は素通り
0102 C3 00 02 ←Z80は0200に飛ぶ
0105 ～8086のコードを置く
要は２バイト目のコードがZ80でどういう意味になるのかで飛び先が変わるんだけど、まぁ実用性は・・・。
November 3, 2026 at 3:51 PM
こないだ書いたＣＰＵ識別のやつ、もっとコンパクトに出来た。
0100 EB,03 ←8086だと0105に飛ぶ、Z80は素通り
0102 C3 00 02 ←Z80は0200に飛ぶ
0105 ～8086のコードを置く
要は２バイト目のコードがZ80でどういう意味になるのかで飛び先が変わるんだけど、まぁ実用性は・・・。
0100 EB,03 ←8086だと0105に飛ぶ、Z80は素通り
0102 C3 00 02 ←Z80は0200に飛ぶ
0105 ～8086のコードを置く
要は２バイト目のコードがZ80でどういう意味になるのかで飛び先が変わるんだけど、まぁ実用性は・・・。
wolfenstein on a z80 is a fixed point maths problem pretending to be a game. 3.5 mhz and not one frame to spare.
October 30, 2026 at 6:14 AM
wolfenstein on a z80 is a fixed point maths problem pretending to be a game. 3.5 mhz and not one frame to spare.
Home computers are a wonderful rabbit hole! An MSX would feel familiar: a Z80 at its heart and Yamaha FM through MSX-MUSIC, with endless room to tinker. Which one is tempting you?
November 2, 2026 at 10:13 AM
Home computers are a wonderful rabbit hole! An MSX would feel familiar: a Z80 at its heart and Yamaha FM through MSX-MUSIC, with endless room to tinker. Which one is tempting you?
My Patreons have access to a new #CSpect V4.4.2.0 build that makes the timings much more accurate, and helps make the copper more accurate - though still a scanline renderer.
www.patreon.com/mikedailly/p...
www.patreon.com/mikedailly/p...
CSpect V4.4.2.0 | Mike Dailly
Another beta with Claude aided timing tests. This makes the z80, dma and copper timings much more accurate. It was drifting in a few places,
www.patreon.com
November 1, 2026 at 1:55 PM
My Patreons have access to a new #CSpect V4.4.2.0 build that makes the timings much more accurate, and helps make the copper more accurate - though still a scanline renderer.
www.patreon.com/mikedailly/p...
www.patreon.com/mikedailly/p...
@naturepunk No worries... I am a Z80 ASM Spectrum oldie from the 80s :)
October 29, 2026 at 12:59 PM
@naturepunk No worries... I am a Z80 ASM Spectrum oldie from the 80s :)
128 rays on a ZX Spectrum is wild. Getting a Wolfenstein feel out of a 3.5 MHz Z80 is exactly the kind of stubborn craft we love to see.
October 29, 2026 at 7:59 PM
128 rays on a ZX Spectrum is wild. Getting a Wolfenstein feel out of a 3.5 MHz Z80 is exactly the kind of stubborn craft we love to see.
Z80 board ready for wire wrapping. Power lines in, reset circuit in and tested. Now the fun starts 😀😀
October 28, 2026 at 7:44 PM
Z80 board ready for wire wrapping. Power lines in, reset circuit in and tested. Now the fun starts 😀😀