Booting a PC over serial port via ROM Basic!

Galaxian via Basic over the serial port

I was sent this link while out for vacation: https://github.com/retrohun/blog/tree/master/dt/bootingfromcom1

So this is great for machines that included the seemingly useless ‘casette basic’ as you could maybe shove over something to config the machine, maybe ‘rom dos’ directly into ram to fdisk/format without using disks… Interesting stuff to say the least!

Author: neozeed

I live in SE Asia, doing generic work, enjoying my life & family

2 thoughts on “Booting a PC over serial port via ROM Basic!”

  1. Actually, the pasted screenshot is a bare “CAS1:” booting and merged into a Galaxian splash. The serial boot is similar, but instead of using LOAD, needs 2 lines of basic code with injected machine code into DATA line(s).

    Anyone is kindly welcome to shorten the basic loader, improvement ideas etc.

    Also it is worth mentioning that crap PS/2 quality boards and their ridiculous HW configuration data are usually getting lost in decades and/or integrated storage controllers might have damage. In such case, a rom basic would be handy 😉 Even just for reprogramming the NVRAM – also keep in mind that their CMOS layout differs from ordinary IBM WC compatibles 😛

    I am working on a serial/lpt/cas bootable rAm-dos (2.11+ based)

  2. A similar system exists for the Apple II called ADTPro. It can be bootstrapped from Applesoft BASIC using either the cassette port or a serial port. Once up and running, you can transfer disk images to real disks on the Apple II. Very handy for getting a system up and running when you don’t have any boot floppies.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.