the vectors are present but all strangely set at $E000 apparently there are 2 peripherals one at $4000 uses $4000 to $4003 perhaps a PIA another one at $8000 seems to be program a way similar to a crtc a value written at $8000 (perhaos the index in the chip) and another in $8001 On 27/08/2020 13:19, groepaz_at_gmx.net wrote: > Am Donnerstag, 27. August 2020, 13:14:05 CEST schrieb didier_at_aida.org: >> I know very little about this eprom >> it was given to be by commodore maintenance about 30 years ago >> according to the label it was supposed to work on a network board >> installed in a 8032 motherboard >> obviously it's not the case >> I'm thinking to a c64 cartridge in ultimax mode (booting in $E000) >> I'm trying to get a better disassembly and some clue to go further > an ultimax cart starts via the hardware reset vector at $fffc - so if you find > a vector there that points to code that looks like startup code, perhaps thats > it. you should also find a valid NMI and IRQ vector then at $fffa and $fffe > respectively > > -- > > http://hitmen.eu http://ar.pokefinder.org > http://vice-emu.sourceforge.net http://magicdisk.untergrund.net > > I recognize that a class of criminals and juvenile delinquents has taken to > calling themselves 'hackers', but I consider them irrelevant to the true > meaning of the word; just as the Mafia calls themselves 'businessmen' but > nobody pays that fact any attention. > <Robert Bickford> > > > > >Received on 2020-08-27 14:03:26
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