>>>>> "DG" == Daniele Gratteri <email@example.com> writes: MV> the least amount of chips and wires possible, which is why I'm MV> piggy-backing 6264's onto the kernal and basic rom. I'm also MV> thinking about DG> I also have got a VIC-20 I want to expand in the simplest mode. DG> Can you tell me what are 6264's chips? I don't know how the VIC-20 DG> works very well... I'll try to write something up when I'm done. The current projects on Funet all require logic chips and a small PCB, I'm aiming for just wires and memory chips. 6264's are 8K Static RAM (SRAM) chips that are almost pin compa- tible with 2364 ROM chips. This enables you to solder the 6264 on top of the ROM chip (aka piggy-backing) and just rewire 6 pins, instead of having to wire all 28. It's a quick and dirty solution, but it works. The Vic-20 is a *very* simple computer, almost everything is done with standard 74xx logic chips. Check the scematics on Funet, http://ftp.funet.fi/pub/cbm/schematics/computers/vic20/ -- ___ . . . . . + . . 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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