OHHHHHhhhhh MAN!!! I put it away when I bought my A500. I’d been wanting to try it for a while but I feared it didn't work. Today is the day. It works exactly like it worked when I stored it almost 40 years ago.
The only thing which don't work in this awesome MSX Canon V-20 is the T key but I'm still super happy with it. I'll try to fix it at a later date.
Does anyone know where I can buy a #Z80 chip in the UK? I'm looking for a Z84C0010PEG but can't find it anywhere 
Single-Board Z80 Computer Draws Inspiration From Picasso - Picasso and the Z80 microprocessor are not two things we often think about at the ... - https://hackaday.com/2025/05/01/single-board-z80-computer-draws-inspiration-from-picasso/ #picasso #rc2014 #news #z80
Today's little project. A 256 byte monitor for Z80 machines that can run without any RAM, and lets you play with I/O and memory or run code.
It's for those annoying bring up jobs when you are trying to debug new hardware but ialso designed so that you can jump to it with HL loaded with a message to print so you could use it for example as a fallback when your boot firmware self test fails.
http://github.com/EtchedPixels/ROMBAT
Also uses the stack pointer and ret for threadcode..
“Many have jumped ship to macOS or Linux. Some have burned out and live on riverboats with solar panels writing retro 6502 games on an original Commodore 64.” 
This rings true. I jumped to Linux in 1996 (regretting only the loss of Paint Shop Pro in the process) and I now spend some of my time disassembling old terminal and arcade code and writing #Z80 assembler for my Link 480Z. #retrocomputing
Windows isn't an OS, it's a bad habit bordering on addiction • The Register
https://www.theregister.com/2025/04/28/windows_opinion/
FREEZE-ZX issue 1 ‘zine for #ZXSpectrum enthusiasts.
I’m aiming for an August 2025 release.
Pre-order your copy from:
https://freeze64.com/freezezx-issue-1/
#Z80 #RetroGaming #HomebrewGaming
Quick reminder that the #retrogamedev IRC channel in Libera is still on: https://www.usebox.net/retrogamedev/
Come and lurk with us! There's also the occasional chat that you may love too; likely will share some of the development of my new MSX2 project.
Just blogged about building the beautiful @rc2014 Mini II Picasso limited edition kit #z80 #z80kits #retrocomputing #soldering https://concretedog.blogspot.com/2025/04/building-beautiful-things-rc2014-mini.html
Finally tonight a little time starting to assemble the frankly glorious ltd edition Mini II Picasso from @rc2014 gonna save the rest till tomorrow. #retrocomputing #z80 #pcbart
New blog post! Is it still possible to get cheap Z80-based home computers? VTech is on your side, as long as you don't look too closely at that keyboard (woof.) But I managed to get it to draw some pixels, and generate composite video, so we're off to a great start learning and playing together with the VTech Socrates. #retrocomputing #retrogaming #z80 #kicad #vtech
https://www.leadedsolder.com/2025/04/22/vtech-socrates-pickup.html
I moving on to start implementing user types in the #Quiche #compiler. I figure the most useful type to have is arrays and, by implication, strings. Arrays boil down to typed pointers internally so I'm starting with the pointer stuff.
This now works to assign the address of a variable to a typed pointer, and to instantiate a variable to assign that pointers value to. The PI variable is to test that assigning a ^Byte to it fails (which it does).
Blogged about Deep Fishing:
https://solhsa.com/oldernews2025.html#DEEP-FISHING
Includes the game .tap, online emulator, links to full z80 source code.
Je rattrape (un peu) mon retard dans les montages à assembler avec ces deux "NOP testers" pour #z80 et #mos6502
Et un NOP testeur céquoidon ? C'est un montage qui permet de vérifier qu'un microprocesseur est vivant en présentant la commande NOP sur le bus de données (câblée en dur sur le circuit) et en regardant ce qu'il se passe sur le bus d'adresse : la commande NOP ne faisant rien le processeur passe juste à l'instruction suivante ce qui a pour effet d'incrémenter l'adresse, visualisée ici avec une série de LEDs.
L'horloge est ici un 555 pour que ça aille assez lentement pour y voir quelque chose !
#retrocomputing
+++ SYSOP NEWS +++ SYSOP NEWS +++
As you may remember, RC-BOX BBS - the world's first and (currently) only RC2014 based BBS - has been struggling with connectivity issues.
The good news: I have finally been able to successfully mitigate these.
Some background info: in October last year, I decided to do some maintenance on the system, updating my WiFi modem firmware and replacing the SC132 serial I/O module (using a 6.144 KHz crystal for a fixed 9600 bps) with its cousin, the SC110 serial I/O module which features a CTC chip so it can dynamically set any baud rate.
Turns out that while the module is techincally 100% okay, it sometimes locks up when being used with the BYE.COM program for CP/M.
I think this has to do with BYE.COM setting the CTC to the selected bps during initializiation (which happens after each hangup). For some reason, this often works but occasionally causes the SIO/2 to lock up.
Sometimes, without any reason, BYE.COM would drop into an +++ATH loop although no one was connected, not being able to actually perform the AT command.
It took me weeks to finally realize this, because I was so sure the problem originated from the Zimodem firmware and because the issue only showed up occasionally. It was very annyoing to debug.
So as a result of this finding, I've put the SC132 with the fixed 9600 bps back into the system. Since then, no more of these issues occurred.
As always, you can find all info on how to connect to RC-BOX BBS in my profile info.
P.S.: so now I think the problem originates from the BYE.COM code. But since everything is working properly again, I don't have the desire to dig into the BYE.ASM code any time in the future. There are other projects that I'd like to go on with first.
#rcbox
#bbs
#rc2014
#rc2014bbs
#retrocomputing
#newretro
#z80
Trouvé sur eBay : un livre sur le CP/M "adaptation du BIOS et compléments" et une carte "Z80 plus" de Applied Engineering qui permet de faire tourner CP/M (via le #Z80 qui est sur la carte) sur un #apple2 (qui est lui équipé d'un processeur 6502) !
Pour tester ça il faut encore que je trouve les disquettes qui vont avec
#retrocomputing
@Chrishallbeck Lived and still live in the future. 
Started in ‘78 with the school Commodore PET, then my Uncles TRS80 and by 1980 my own hand forged “Sir Clive”, steam powered #Sinclair #ZX80 with #Z80 processor @ 3.XX MHz with 4K ROM (later a #ZX81 upgrade) and 1Kb RAM.
<https://flickr.com/photos/bootload/albums/72157607718005837/>
I have a stupid little zx spectrum game planned (design doc & assets drawn already).
Should I go
Out there, in the worrying world of today is a little #Zilog #Z80 computer with a mere 64KB of #RAM and running the #1970s CP/M operating system.
This little machine is connected to the #intertubes and it's serving a #singleuser #bulletinboardsystem for you, the worrying souls of #yesteryears to visit.
Take a break from today, connect like it's 1985 - here on RC-BOX BBS, the world's first and (currently) only #rc2014 based bulletin board system in the world!
Check out the #alttext or my #profile info for information on how to connect.
Honestly, sometimes I marvel at the things I get paid to do...
♬ 
