HP41CL Machine Code setup

[Hiwi]

Hi all,
i have used the zenrom configuration setup for machine programming for some time now.
Attaching CL RAM to HP41OS (830000-0000 YMCLR and -830 F PPLUG) as decribed in the manual.

For some reasons i like more the CCD OSX and David assembler setup.

I can plug CCDX and DAVS withot any problems, but QRAM does not work.

A cat F comes back with a NOROM message. The Davidassembler could not use page F.

Is it the same setup up or do i have do write some special bytes to the page?

Ralf

[MeindertKuipers]

It looks like you are doing everything right. With CCD-OSX loaded did you do a CAT "0 G? This gives you a complete overview, and Page F should show you QRAM.
As an extra test you could try to poke and then peek in the first location of your ROM to give it an XROM number. ALternatively you could copy an existing ROM from flash to your RAM page (verify with peek if data has been copied), plug it and check if it appears in any of the CAT options.

[Hiwi]

Thank you Meindert,

I did no CAT "0 G?

I will try this today.

Ralf

[Hiwi]

Hi Meindert,
that was all correct! A cat"0 G shows QRam and I was able to write some bytes with the Davidassembler.
Ralf

[MeindertKuipers]

Good to hear that thing now work. I have written a guide for the HP41CL, this might be handy to have around for your mcode adventures: https://systemyde.com/pdf/HP41CL%20-%20T...20v1.0.pdf