Hi,
I have a working old code in rom 32k, I added ram code at the upper 32k and I set the hw to start form the new ram at 32k.
I want to address old function from the new ram code without modify the old project.
once I compile the project code the hex output is not the old rom hex with the new ram code.
rather it recompiled the old code to optize it and I have a new hex that is not like the old rom hex with the new additions.
The thinng is that I need to address the old code function (fixed hex in rom).
what can I do?
regards, dan
.. "the '51 PC" BIOS in ROM and stored program in RAM.
Many have, over the years, had threads about this (mainly at 8051.oom) I have yet to see a thread ending "it now works great"
Anyhow, even if someone should succeed how many stored program (non-control) apps would there be that fit in 32k or whatever is left after the BIOS?
In the olden pre-ISP days there might have been a reason for an amateur to have such a setup, but with ISP I fail to see the purpose.
Erik