|JGH ROM for ZX Spectrum|
|This is a modified version of the ZX Spectrum ROM that I wrote in 1984-1985. I hand-assembled it and poked the values into an image in memory before blowing it to EPROM. The source code consisted of lots of pieces of paper! In 2003 I typed up all the scraps of paper into proper source code and fixed a couple of outstanding bugs.|
|Docs/txt||15K||Documentation, including details of how to call the extra routines from user programs.|
|Patch/src||40K||Source code, written in BBC BASIC Z80 assembler.|
|Patch/lst||74K||Assembly listing of version 0.76 of the patch code.|
|ROMInfo||2K||Initial documentation from back in 1985.|
|JGHSpec||16K||ROM image patched to use on Speculator.|
The Spectrum ROM is copyright Amstrad. Amstrad have kindly given their permission for the redistribution of their copyrighted material but retain that copyright. The extra code is copyright J.G.Harston and may be redistributed, and may be extracted and used in other code, with attribution.