Included tags: z80 ×
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General Discussions • Z80 end-of-life announced

MISTerFPGA about 29 days ago

After nearly 50 years in production, the last of the original Z80 CPU family has been declared end-of-life, apparently because the fabrication process is being retired. This doesn't have any immediate practical impact for most retrogaming/retrocomputing p …
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The Processor Used In Pac-Man Is Being Discontinued, 48 Years After It Launched

Time Extension about 1 month ago

The Zilog Z80 launched in 1976.The Zilog Z80 8-bit microprocessor has finally reached the end of its commercial lifespan, 48 years after it first hit the market.Designed by Federico Faggin and Masatoshi Shima and developed by a team of just 11 people, the …

NG.DEV Team MVS Carts - Nuances/Issues?

Neo Geo Forums about 1 month ago

I just got a Kraut Buster. Is it supposed to work exactly the same as a official cart in a multi-slot MVS? (I. E. Switching between games with the button, working with other carts.) The cart works in Slot #1, but not in other slots (shows a z80 error when …

Neo Geo 3-4 Strange Audio.

Neo Geo Forums about 2 months ago

I have a Neo Geo AES 3-4 Board. I am getting very inconsistent audio. For example in some games it is fine for 5 seconds then it glitches out. Then in Metal Slug 3 and others I get nothing at all. Some games just the music is missing. Some games the first …

Very dead MV-1F, bad video sync and no click-of-death

Neo Geo Forums about 2 months ago

I've got quite the basket case of an MV-1F, typical eBay purchase sold as not working. In short, the system is so dead it doesn't even have the click of death, it is stuck at the point before that, before the video sync signal is even set correctly. My te …

Sound problem in MVS Board 1 slot

Neo Geo Forums about 2 months ago

Hi all, i have an issue with a MVS MV1F, 1 slot. Sounds, in this case FX, effects, voices, are distorted, i dont know how to explain it. Music works fine. I have repaired many mvs boards but i cant find the problem in this one. Traces between ram (6116), …

Consolized MV-1B hw test failed

Neo Geo Forums about 2 months ago

Well I guess this was meant to happen at some point but it took me by surprise to see mine glitching out after being months unhooked from power. I'm getting a hardware test failed for Backup RAM and the Z80 System... or at least that's what I think, becau …

z80 error

Neo Geo Forums about 2 months ago

The z80 error screen appears, could it be the chip or some cut track? …

Aes blue screen but doesnt boot

Neo Geo Forums about 2 months ago

Hi folk, i have some troubles with an aes 3-4 console, without cart i obtain a cool blue screen, if i dont wrong its mean no game in slot but system is working, with neo-diag, all test passed. (z80 no tested) and with unibios logo unibios 4.0 is visible bu …

Memodyne M80 fix up

VCFed about 2 months ago

I bought this a long time ago and posted it here. Originally was thinking it was just a fancy digital cassette recorder, however subsequent Googlings proved it to be a ruggedized Z80 computer from the late 70s. The interior is in excellent condition and …

QPM by Mitchell Mlinar, any one used it?

VCFed about 2 months ago

QPM was a product by MICROCode consulting in 1985 as a Z80 rewrite of CP/M 2.2 with 10%-15% performance improvements and more features in the same memory footprint. Written by Mitchell Mlinar and he released it for free (personal use) since 2002. He hos …

ZX Spectrum, ZX81, SAM Coupé, TSConf, QL, Next • Z80 Coprocessor Interface

MISTerFPGA about 2 months ago

hi, can anyone define an interface for a Z80 coprocessor, implementing at least integer multiply and divide, and better also the IEEE 754 standard for floating point operations?Add those instructions to the Z80 base set should enhance the performance enou …

Cowgol, C & assembler development environment hosted on Z80 computers running CP/M

VCFed about 3 months ago

Cowgol is a programming language for very small systems, including Z80 computers ( see https://github.com/davidgiv... ). You will find here: https://github.com/Laci1953... , a complete Cowgol development environment, hosted on CP/M, for …
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Z80-CPM SoftCard designed by Ralle Palaveev

Apple Fritter about 3 months ago

I have for sale couple of Z80-CPM SoftCard design by Ralle Pa version 1.6.MacFly described very well all about this cards on his blog: “What does an Apple II VGA Card, a Z80-CPM SoftCard and an USB-Apple II Mouse Interface Card have in common? Well, alm …

Commodore Events - Both Old and New C= • ZOOM MEETING: Jessica Petersen - Programming in TRSE - Thursday, Feb. 15, 2024 - 7:30PM ET !

Commodore.ca about 3 months ago

If you love programming or playing homebrew games, you won’t want to miss this presentation. Jessica Petersen is a Commodore enthusiast who specializes in the use of Turbo Rascal Syntax Error (TRSE), a complete cross-platform suite for making retrocomp …

ZOOM MEETING: Jessica Petersen - Programming in TRSE - Thursday, Feb. 15, 2024 - 7:30PM ET !

VCFed about 3 months ago

If you love programming or playing homebrew games, you won’t want to miss this presentation. Jessica Petersen is a Commodore enthusiast who specializes in the use of Turbo Rascal Syntax Error (TRSE), a complete cross-platform suite for making retrocompu …

IMS Series 8000 (5000SX?) Project

VCFed about 3 months ago

I've picked up the card cage, motherboard, and some IMS cards that I hope to use to build a multi-user Z80 system that'll be pretty much the same as the first computer I ever actually wrote a program one, which was the IMS Series 8000 that my dad had at th …

Z80 EMACS for CP/M (2.2)?

VCFed about 4 months ago

I've spent a lot of time trying to get Ralph Betza's version of EMACS working with a VT100 terminal, but so far have been unsuccessful. It looks like his code is set up to work with either an "ASCII" terminal or an "ANSI" terminal (his …

Problem with mv1b motherboard

Neo Geo Forums about 4 months ago

problem with mv1b, z80 error appears on the screen. Will it be the connections that go to the chip or the z80 chip? I have removed the battery and I have seen a little corrosion, what is the solution? greetings …

"Best" CP/M Z80 C compiler suite?

VCFed about 4 months ago

Is anyone doing C work ON a native machine? Which compiler and other tools are you using? Which ones have a decent I/O library? Which are faster at building than others? Not interested in cross compilers, looking for something platform, and it's running …
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Anyone know what kind of daughterboard is on this Kaypro?

VCFed about 4 months ago

Saw it on evilbay... Couldn't find anything else on it and was curious, There's an interface shim under the z80 and a side board to the left. …

Cirtech CP/M board, help required for emulation.

VCFed about 4 months ago

I have one of the Cirtech CP/M boards that plugs into the 6502 socket for the //e. I have disassembled all of the non-DRI bits and there is some copy protection in there that uses the 6502 <-> Z80 address PROM and the A11 line to check it's running o …

NorthStar Horizon Z80 ROM monitor/diagnostic tool

VCFed about 4 months ago

https://github.com/codesleu... NorthStar Horizon is a S-100 bus Z80 computer from 1977. This ROM monitor was created as part of a restoration project. The initial need was a diagnostic to isolate and troubleshoot basic hardwa …

CDOS and TU-ART serial board drivers

VCFed about 5 months ago

I have a Cromemco 4FDC controller, ZPU, and I am trying to figure out how to get Kermit working with the TU-ART board. I followed the instructions here and Kermit is running on CDOS 2.58 but trying to SET PORT in Kermit says that it is not implemented. I h …

[yt] Video showing a deep dive into the earliest to date copy of 86-DOS 0.11.

VCFed about 5 months ago

This video gives an in-depth look at what is currently the oldest known copy of 86-DOS, the antecedent to #MSDOS aka #PCDOS, where we go through the process of moving from CP/M, translating Z80 to 8086 code, and assembling it. Since this DOS predates the I …