On Sat, 10 Oct 1998, Peter Karlsson wrote: > The problem is that my C64 (newer model, bought in 1988) has surface-mounted > chips... Are you sure that they are surface-mounted? I have never seen surface-mounted chips in a C64. > I was thinking of installing the JiffyDOS chip piggy-back on the > existing kernal chip, and somehow removing the Chip Select signal from the > existing chip, and feeding it to the JiffyDOS chip instead. You can desolder a Chip Select or Output Enable signal from the original chip and connect it to +5V or ground, whichever is the inactive level. Then you can piggy-back the JiffyDOS chip on the ROM. But I think that it would be much cleaner to desolder the old ROM chip. It's only 24 or 28 pins: piece of cake! (Guess who upgraded a 128k REU to 512k by desoldering all 16 memory chips (16 pins each)?) Marko - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tcm.hut.fi.
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