On 1/10/2023 7:48 PM, Jim Brain wrote: > On 1/9/2023 6:47 PM, Rob Clarke wrote: >> >> Hi all, >> >> Small question on JiffyDOS versions. I recently acquired a 1581 that >> came with JiffyDOS installed whch was labelled as v6.01. I had read >> from the CMD JD literature that that JD included all the Commodore >> firmware patches from the latest available ROM version at the time. >> >> After poking around in the ROM. it seems that this 1581 JD ROM does >> not include the SEI patch that Commodore released with the 318045-02 >> ROM which disabled interrupts when processing the command queue. >> There's only 8 bytes difference between the -01 and -02 official >> ROMS, 3 bytes to jump to the patch code, 4 bytes for the patch code, >> and one byte to disable the ROM checksum check at /RESET. Details below. >> >> Can anyone familiar with JD versions confirm that the 1581 JD ROM did >> not include Commodore's patch? >> >> Differences below. >> >> >> 318045-01 318045-02 Jiffy 601 >> AF8C 3A 00 3A >> C160 6C 4C 6C >> C161 48 AF 48 >> C162 00 C5 00 >> C5AF FF 78 FF >> C5B0 FF 6C FF >> C5B1 FF 48 FF >> C5B2 FF 00 FF >> >> Rob >> > I wonder if the patch was unneeded on JD? Have you tried JD with the > patch? > > Jim > > > -- > Jim Brain > brain_at_jbrain.com > www.jbrain.com Any updates? Jim -- Jim Brain brain_at_jbrain.com www.jbrain.comReceived on 2023-01-24 06:00:03
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