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Support for VT100 dot stretching

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This commit is contained in:
Jeff Parsons 2016-08-08 11:19:06 -07:00
commit f7464dd182
7 changed files with 4890 additions and 4701 deletions
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11
devices/pc8080/rom/vt100/README.md
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@ -26,15 +26,18 @@ He then describes the memory map as follows:
E52 H H L 0x0800
E56 H L L 0x0000
The above PCB chip locations correspond to the following [DEC ROM](/devices/roms/dec/) dumps:
The above PCB chip locations correspond to the following [DEC ROMs](/devices/roms/dec/):
* E56: [23-061E2.bin](https://web.archive.org/web/20140723115846/http://www.dunnington.u-net.com/public/DECROMs/23-061E2.bin)
* E52: [23-032E2.bin](https://web.archive.org/web/20140723115846/http://www.dunnington.u-net.com/public/DECROMs/23-032E2.bin)
* E45: [23-033E2.bin](https://web.archive.org/web/20140723115846/http://www.dunnington.u-net.com/public/DECROMs/23-033E2.bin)
* E40: [23-034E2.bin](https://web.archive.org/web/20140723115846/http://www.dunnington.u-net.com/public/DECROMs/23-034E2.bin)
And sure enough, concatenating those four DEC ROM dumps produced a perfect match for Trammell Hudson's
[VT100.bin](http://trmm.net/images/2/20/VT100.bin).
And sure enough, concatenating those four DEC ROMs:
cat 23-061E2.bin 23-032E2.bin 23-033E2.bin 23-034E2.bin > VT100.bin
produces a perfect match for Trammell Hudson's [VT100.bin](http://trmm.net/images/2/20/VT100.bin).
### Character Generator (2Kb)
@ -46,7 +49,7 @@ The ROM contains 128 rows of character data, 16 bytes per character. More on th
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)):
dz80 -80 archive/VT100.bin
dz80 -80 VT100.bin
This produced VT100.d80, which I renamed to [VT100.asm](VT100.asm). I fixed one `dz80` bug, replacing references to
`X2000` with `2000h`, and then hand-merged most of the comments from [haxrom.d80](https://github.com/phooky/VT100-Hax/blob/master/ROMs/haxrom.d80).