|Re: MCODE (what else?): Creating a new ROM from the 41 --> Transfer?|
Message #10 Posted by H嶡an Th顤ngren on 20 Jan 2010, 7:48 a.m.,
in response to message #9 by Geir Isene
Ouch, you are really trying to program MCODE on the hp41? I guess people did that back when they did not really have much computers.
Back then, I quickly redesigned my 6502 assembler on my Commodore 64 to do MCODE programming. Then I downloaded the results to my home built MLDL using a parallel cable that simulated the hp41 bus running WROM instructions to the ram page. I believe it took some 37 seconds to get it down. The assembler itself was very quick, being written in 6502 assembler, but reading them from the slow 1541 floppy was not (as source was too big to fit in memory). I also had an EPROM burner to do more lasting images that I just plugged into the MLDL.
I never did any programming on the hp41 itself, just paper and pen, then to the C64.
Today I would not even dream on trying it either. But if you think it is fun, why not? Then the David Assembler should be way to go.
If I where to do it on vacation with limited resources, I think I would get a small netbook and use some tools on that one instead.
As always there is the trouble of transferring to and from the hp41, it has always been like that...