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'M LIVE FOR A GAMEBOY GAMEDEV STREAM

Making the enemies drop the attacks (and maybe add more than 4 and be able to unlearn some ?)

Join me !! https://www.twitch.tv/astatinchan/

#Z80 #retrocomputing #Z80MBC2 #diy

Bonjour,

voilà le premier prototype du boîtier pour mon ordinateur retro à base de Z80. (Z80-MBC2 avec un terminal UTerm)

My Z80-MBC2 case (first prototype)

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).

Enterprise 64: The popular and unknown 8-bit computer of the eighties

https://youtube.com/watch?v=9qkWmH3ou_I

Blogged about Deep Fishing:
https://solhsa.com/oldernews2025.html#DEEP-FISHING

Includes the game .tap, online emulator, links to full z80 source code.

A new piece of art has arrived #picasso

@rc2014 #RetroComputing #VintageComputing #z80 #rc2014 #zilog

Further investigation in the brilliant Heavy on the Magick, by Gargoyle Games, I've discovered a couple of oddities. To key presses are not mentioned in the manual. Key 5, will pause the game. This is consistent with the previous games by GG. However key 4 is also detected in the same code, but doesn't seem to do much, other than pause the game if held down. In the previous games, 4 set off a demo mode, so I wonder if that was the original aim? #HOTM #GargoyleGames #ZXSpectrum #retrogaming #z80

Overnight I've successfully compiled the sources for the #FUZIX operating system on my #Linux box and this morning, my #SC130 successfully booted into FUZIX ... yay!

https://www.fuzix.org/

#rc2014
#z80

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

With spring sprung, the blatting season underway & many other things on my plate, it's unlikely I'll do much more to my Pico MZ-80K/A emulator before autumn.

So now's the perfect time for you to try it out and report any issues you find to me!

https://z80.timholyoake.uk/the-pico-mz-80k/

https://nemanjatrifunovic.substack.com/p/the-curious-case-of-jupiter-ace

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.

#bbs
#rc2014bbs
#rcbox

#Z80 computer:

https://z80kits.com/shop/rc2014-mini-ii-picasso/