[Coco] Chip ID
afra at aurigae.demon.co.uk
Tue May 9 14:13:01 EDT 2006
Chester A Patterson wrote:
> Hello all,
> I picked up some old stuff yesterday, and need to ID it to see if it is of
> any use for Coco hardware.
> 18 4164-15
> 18 4164-2
64Kx1 Dram chips, 150ns & 200ns, used in 32/64K CoCo 1/2 & Dragon 64
(also some 32s have half bad ones).
These can often be used to upgrade 16K CoCo 1s to 64K *** NOTE *** this
is not just a simple chip swap, you need to change jumpers as well or
you will fry the ram !
> 9 81256-15
Not sure but probably some sort of RAMs, sound like 256Kx1, so possibly
of use in some CoCo 3 exansion modules ???
> 32 4161-15
16Kx1 Dram chips, used in 16K CoCo 1/2 & some Dragon 32s.
> 1 74S409-2N
> 1 6502 CPU Nostalgia
> 1 8088 CPU Nostalgia
> 1 8086-2 CPU Nostalgia
Well load of vintage home micros used the 6502, and of course lots of
old PCs used 8088/8086.
> 8 71C464-80
From a google search this looks like a 41464 64Kx4 equivelent, 41464s
where used in some of the 64k CoCo2 machines, as replacements for the
2x4416 16Kx6 chips.
> And several assorted 2764, 27128 and 27256 EPROMS.
Now I just need a source of 2532s, as a lot of the old Dragon carts used
Phill Harvey-Smith, Programmer, Hardware hacker, and general eccentric !
"You can twist perceptions, but reality won't budge" -- Rush.
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