Marko Mäkelä wrote: > ROM is causing some trouble. I saved VICE's version as > /pub/cbm/firmware/computers/business/pet/edit-4-80-b-50Hz.901474-04?.bin, > because it only has 12 different bytes from the 901474-04 ROM image > that was already on FUNET. All differences are after $e720, right > after the dL"*^Mrun^M thing. Does anyone know what the bytes are used > for? For the CRTC initialization perhaps? I have found it now: at $e07a a vector $e72a is loaded to $c7/$c8 (at $e082 the vector is $e73c), which is used as index. Then the 18 bytes following this address are stored to the registers 0-17 into the VDC. Those values directly after the dL"*".. thing should be register values for the VDC then. Andre -- Email address may be invalid. Use "fachat AT physik DOT tu-chemnitz DOT de" ------Fight SPAM - join CAUCE http://www.cauce.org------Thanks, spammers... Andre Fachat, Institute of physics, Technische Universität Chemnitz, FRG http://www.tu-chemnitz.de/~fachat
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