Z80
RunCPM
Z80 | RunCPM | |
---|---|---|
2 | 4 | |
397 | 383 | |
- | - | |
9.2 | 7.3 | |
8 days ago | 2 days ago | |
C | C | |
GNU Lesser General Public License v3.0 only | MIT License |
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Z80
- Making a Homebrew Z80 machine, want to emulate it for testing before build. Could I...
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The Z80's feature discovered after 40 years [video]
Despite giving a talk, I'm not an expert on the subject, but if you look at ZX Spectrum forums and the ZX Spectrum discord, you'll find more information: the block instruction flags, the NMI preservation during reset, SCF/CCF flag instability. I haven't research any of those yet, but many have and did publish those results ! redcode's Z80 emulator seems to be the most up-to-date on those subjects: https://github.com/redcode/Z80/blob/master/THANKS (has many links to the various reverse engineered parts).
RunCPM
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What's the oldest technology you've had to deal with in your career?
I happen to have an emulated CP/M 2.2 installation quick to hand to run old word processors, so let's take a look.
- Running CP/M on the Raspberry Pi Pico
- What is a good "lower level" language to learn after learning python to gain a deeper understanding of computers?
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Ask HN: Are impressive new programs being written for CP/M?
There are no doubt some systems still running under emulation doing the same thing as they were 40 years ago. But the truth is CP/M is dead. Long live CP/M!
It's just hobbyists now. One hacker ported his game to a Kaypro under CP/M a couple years ago: http://www.chrisfenton.com/dd9-kaypro-edition/
Much of the focus is on porting CP/M to whatever new or old Z80 system someone has built or found. I can't think of anything particularly dazzling besides the above, in terms of recent new programs, but here are some pointers if you wanted to write something yourself!
RunCPM is a CP/M Z80 virtual machine under modern OSes for development etc. https://github.com/MockbaTheBorg/RunCPM
CP/Mish is an attempt to bring all the free software CP/M tools together. It is to CP/M as Linux is to UNIX, or FreeDOS is to MS-DOS. A mostly complete, improved, libre reimplementation: https://github.com/davidgiven/cpmish
Also from David Given (and not CP/M specific) is Cowgol. Alpha quality. But it's a self-hosted Pascal/Ada-like language with compiler. Runs on 8-bit systems, at least theoretically. It is written, of course, entirely in Cowgol: https://github.com/davidgiven/cowgol
Millfork is a language which targets CP/M systems, among others. It's a whole-program optimizing compiler for a language somewhat lower level than C, with properties that make it very nice to compile for 8-bit systems like no recursion, and no automatic promotion to 16-bit integers in type handling: https://github.com/KarolS/millfork
SDCC supports the platform with C surprisingly well. I wouldn't call it rock-solid but compared to the above toys it is an industrial quality compiler for the Z80. In fact, C seems to be the most common actual language for hobbyist and the little remaining serious Z80 development, probably ahead of assembly.
If it just reads and writes the terminal and can fit in 64 KB, then a port is probably straightforward.
What are some alternatives?
8080 - A complete emulation of the Intel 8080 processor written in C99.
z80 - A z80 emulator written in C99.
Z80 - Highly portable Zilog Z80 CPU emulator written in ANSI C
RunCPM_RPi_Pico - RunCPM for the Raspberry Pico
z80 - Z80 CPU Emulator (with built-in debugger)
RetroWiFiModem - An ESP8266 based RS232 <-> WiFi modem with Hayes AT style commands and LED indicators
SMSTestSuite - SMS Test Suite
cpmhttpd - A basic web server for CP/M
halfix - x86 PC emulator that runs both natively and in the browser, via WebAssembly
millfork - Millfork: a middle-level programming language targeting 6502- and Z80-based microcomputers and home consoles
uriparser - :hocho: Strictly RFC 3986 compliant URI parsing and handling library written in C89; moved from SourceForge to GitHub
lighthouse-of-doom - A simple text-based adventure game