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Project to bring CPM3 to IMSAI 8080 computer
The xmodem.asm program was added to the repo along with xmodem.com.
This version is coded in 8080 assembler and builds on unix and cygwin with the
asm8080 assembler.
It will not build with rmac or asm on CPM3 at this time.
When running xmodem on the console port the ani 7fh after reading a byte in CHARIO3.ASM is an issue.
We can remove it with little consequence....
You must be very careful to avoid pushing any disk buffers up in the eprom space. It will produce very random
results.
In my case, the CF cards became read only, and nothing I did fixed that. It did not show up after the first gencpm
with a new ram address. It held off for a few reboots, then bang. Read Only flag.
Setting my top of ram to actual stopped the bug.
There is no real fix for this, you just have to get it right.
The cpm build environment has an older altairz80 (simh) simulator, and there are some seed drives to support the
building of the root cpm3 boot disk on a windows machine. All good so far.
The issue is that new_altmon.asm is not compatible with the a:asm assembler on the seed disk a:
There are 2 problems that need to be addressed. 1 the @ signs will not fly. The assembler does not seem to like them
2 may need to add : after some of the symbol definitions. 3 need to run unix2dos on the source code before sending
it into the simh code.
We can probably cover this with a make file. For building we need a submit file on the i: drive seed disk. And a readme.md
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