I had a quick look at this ROM this evening as it had been on my list for a while. Looks like it is DFS2.45 plus one of Andrew Benham's DFS patches (https://www.adsb.co.uk/bbc/dfs.html), diffs as follows. In the hex dumps, the - row(s) are the original ROM and the + row(s) are the patched ROM.
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Patch code at 91f4 and a22c to make OSWORD $7d and $7e work, as per the page.
The patch for double density OSWORD $7f isn't included.
--Tom
Update copyright date.
Code:
-00000010: 35 00 28 43 29 31 39 38 35 20 41 63 6f 72 6e 00 5.(C)1985 Acorn.+00000010: 35 00 28 43 29 31 39 38 39 20 41 63 6f 72 6e 00 5.(C)1989 Acorn.Code:
-000011F0: f0 10 e0 f0 a9 ff 8d 82 c2 86 c7 84 c8 a0 0c b1 ................+000011F0: f0 10 e0 f0 86 c7 84 c8 a9 ff 8d 82 c2 a0 0c b1 ................-00002220: ae a5 a0 d4 b1 b0 48 da 68 fa 10 df a6 f0 86 c7 ......H.h.......+00002220: ae a5 a0 d4 b1 b0 48 da 68 fa 10 df a4 ef ea ea ......H.h.......-00002230: a6 f1 86 c8 c8 10 07 a6 c7 a4 c8 4c f4 91 20 52 ...........L.. R+00002230: a6 f0 86 c7 a6 f1 86 c8 c8 10 03 4c f8 91 20 52 ...........L.. R--Tom
Statistics: Posted by tom_seddon — Fri Jan 24, 2025 1:40 am