HOWTO: Build your own CP/M3 BIOS for Z80-MBC2

[Ho-Ro]

This topic popped up on SuperFabius' repo. I do not want to hijack his project - let's discuss further here.

I wrote:

If you want to build your own Z80-MBC2 BIOS you could try my BIOS source. Either use my Linux cross-build or put my disk image on the SD card. Both support building with make, all required CP/M tools are provided.

@pawosm-arm asked:

Is this disk image complete? I'm seeing this:
...
MAKE@@@.SUB?
N>

Answer: It depends - all tools are available, but CP/M must find them.

To use my MAKE.COM / MAKEFILE solution it is important to have SUBMIT.COM in your PATH (actually it's on A:), I achieve this through my A:PROFILE.SUB which defines the search path and other things.

device console [columns=100,lines=30]
setdef *,A,B [temporary=O:,order=(SUB,COM),nopage,ymd]

Result:

Drive Search Path:
1st Drive            - Default
2nd Drive            - A:
3rd Drive            - B:

Search Order         - SUB, COM
Temporary Drive      - O:
Console Page Mode    - Off
Date format used     - YMD

A quick test with disabled profile gave exactly your error message.
Rationale: MAKE.COM checks the dependencies defined in MAKEFILE
and creates the MAKE@@@.SUB file with all necessary commands to resolve these dependencies. At the end of this analysis process MAKE@@@.SUB is executed by SUBMIT MAKE@@@.SUB.
As a fix I've put all needed tools, i.e. SUBMIT.COM, ERASE.COM,and RENAME.COM on the drive N: disk image and updated README.MD accordingly. Now this is a real stand-alone build disk.

Martin

[pawosm-arm]

Thanks Martin, this build disk is a great thing!

[pawosm-arm]

I can confirm that with this new disk image I could rebuild entire BIOS with ZPM3. Thanks! 👍