[BBC-Micro] Reviving a dead BBC+
anders.carlsson at sfks.se
Mon Apr 14 08:25:53 BST 2008
Chris Thornley wrote:
> Could you enlighten us in the defences other than the clocks and less
> instructions in the CMOS variant.
According to Jim Butterfield in September 1983, the 6512-6515 are identical
to 6502-6505 except that they need (?) an external clock circuitry.
The 6510 on the other hand has its own built-in clock generator just like a
6502, plus the 6-8 bit I/O port which allows the C64 to have ROM on top of
I didn't quite find any datasheets for 6512, but perhaps I didn't look close
enough. I just wanted to point out that the page you quoted seems to contain
a big typo, which voids the whole idea. Actually it is amusing to see how
many people have misconceptions about the 6510, given how well-documented
the C64 is.
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