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This commit is contained in:
Jeff Parsons 2016-08-20 11:51:52 -07:00
commit 28f6439b71
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devices/pc8080/rom/vt100/README.md
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@ -48,7 +48,7 @@ The ROM contains 128 rows of character data, 16 bytes per character. More on th
### Disassembling the 8080 Firmware ### Disassembling the 8080 Firmware
Following in the footsteps of [vt100romhax](http://vt100romhax.tumblr.com/post/90697428973/the-vt100-memory-map-and-8080-disassembly), Following in the footsteps of [vt100romhax](http://vt100romhax.tumblr.com/post/90697428973/the-vt100-memory-map-and-8080-disassembly),
I disassembled the ROM, using `dz80` from [D52](http://www.brouhaha.com/~eric/software/d52/) ([manual](http://www.bipom.com/documents/dis51/d52manual.html)): I disassembled the ROM, using `dz80` from [D52](http://www.brouhaha.com/~eric/software/d52/) (here's the [manual](http://www.bipom.com/documents/dis51/d52manual.html)):
dz80 -80 VT100.bin dz80 -80 VT100.bin
@ -61,7 +61,7 @@ Finally, I verified that reassembling [VT100.asm](VT100.asm) with [asm8080](http
original VT100.bin; after adding the correct number of `nop` instructions to the end to the source file, the binaries matched. original VT100.bin; after adding the correct number of `nop` instructions to the end to the source file, the binaries matched.
The other advantage of reassembling the code is that the resulting [VT100.lst](VT100.lst) makes it easy to export comments The other advantage of reassembling the code is that the resulting [VT100.lst](VT100.lst) makes it easy to export comments
and other symoblic information to [VT100.map](VT100.map), which can then be included in the [VT100.json](VT100.json) ROM dump and other symbolic information to [VT100.map](VT100.map), which can then be included in the [VT100.json](VT100.json) ROM dump
and passed on to the PC8080 Debugger. Here are the rebuild steps: and passed on to the PC8080 Debugger. Here are the rebuild steps:
asm8080 -lVT100.lst VT100.asm asm8080 -lVT100.lst VT100.asm