>>>>> "MM" == =?ISO-8859-1?Q?Marko M=E4kel=E4?= <ISO-8859-1> writes: MV> I haven't counted the number of Vic-20 ROMs out there, but in order MV> to fit all of them in 1MB together with a menu program you'll MV> probably have to compress them. MM> Yep, if you remove the duplicates archived on funet, you'll get MM> around 1,4 megabytes. When compressed with pucrunch, the whole lot MM> takes about 8 kilobytes less than a megabyte. Incidentally, that's just what you need for a little selection menu 8) MM> There's no documentation on this particular project available. MM> It's work in progress. The idea is to use a 1-megabyte ROM, maybe MM> a MC 6821 PIA for bank switching, and some glue logic. Is there a good way of getting the 6821 to a known default state on powerup? If it's anything like the 6526 the PIA will be set to all inputs and I guess you could just use a couple of pulldown resistors to get them all to zero. PS: if this projects gets to the stage where you make a couple of PCBs, I'd love to be in on it :) -- ___ . . . . . + . . o _|___|_ + . + . + . . Per Olofsson, konstnär o-o . . . o + MagerValp@cling.gu.se - + + . http://www.cling.gu.se/~cl3polof/ - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail firstname.lastname@example.org.
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