Interesting, my poor addled brain thought the extra two bits couldn't be read back. The 6510-1 & 6510-2 do actually have all 8 data bits. http://archive.6502.org/datasheets/mos_6510_mpu.pdf <http://archive.6502.org/datasheets/mos_6510_mpu.pdf> But then what is weird is the data sheet says hmos, not nmos. So maybe this is actually the 850x?? I still think it's strange they couldn't fit the extra bits in the 8500, when they were able to on the 8501 & 8502 On 06/12/2019 19:41, Frank Wolf wrote: > No that's not correct. The 6510 already had 8 bits of which only 6 > were bonded. > > I also did a side-by-side comparison of the 8500<->6510 some time ago > and they are 100% identical > > apart from the outer perimeter were the buffers/drivers reside. >Received on 2020-05-29 23:47:19
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