https://github.com/mengstr/xmodem80

Xmodem for CP/M Z80 for CON:
https://github.com/mengstr/xmodem80

Last synced: 10 months ago
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Xmodem for CP/M Z80 for CON:

• Host: GitHub
• URL: https://github.com/mengstr/xmodem80
• Owner: mengstr
• License: mit
• Created: 2017-03-25T10:02:33.000Z (about 9 years ago)
• Default Branch: master
• Last Pushed: 2017-03-27T05:56:33.000Z (about 9 years ago)
• Last Synced: 2025-06-03T10:47:57.695Z (about 1 year ago)
• Language: Makefile
• Homepage:
• Size: 87.9 KB
• Stars: 15
• Watchers: 4
• Forks: 6
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# xmodem80 - Xmodem for Z80 CP/M 2.2 for CON:

### What

By some reason I couldn't get any of the existing xmodem programs to work

under my CP/M-8266 project so I decided to write my own small xmodem 

implementation.

I guess the main reasion for the problems is that I needed to use the

standard main console device CON: for I/O, most old implementations uses a 

separate device, either as PUN:/RDR: or with direct access to the UART hardware.

![Screenshot](/Pic/screenshot.png?raw=true "Screenshot of xr downloading its source")

### Assembly

The sources for xs and xr can be compiled by the SLR Z80ASM in the CP/M machine or 

cross-compiled with the "z80asm" package in Linux. I guess many other assemblers can 

be used as well with the source unmodified or slightly altered for that assemblers 

particular syntax, but those are the ones I use.

### Usage

Receiving a file on the CP/M machine is as easy as `XR FILENAME.EXT` or with a drive letter added as `XR B:FILENAME.EXT`

Sending a file from the CP/M is `XS FILENAME.EXT` or `XS B:FILENAME.EXT`

Pressing CTRL-X will exit the program while running.