Digitalker 54104 IC
couryhouse at aol.com
Thu Feb 11 18:02:48 CST 2021
Most challanging was to figure out to make it say naughty things... and once you did how it almost caused havoc in AZ
On Tuesday, February 9, 2021 Jim Brain via cctalk <brain at jbrain.com; cctalk at classiccmp.org> wrote:
I suspect the answer to question #1 is no, but thought I would ask.
1) Anyone happen to have a known working Digitalker 54104 IC they are
looking to trade for some cash that does not involve me selling an arm
or a leg :-)?
2) Barring that, anyone have a known working Digitalker-based unit that
might be able to pop in a suspected non working Digitalker IC and test?
I have a Jameco (yep, the parts firm) manufactured Digitalker unit here
called the JE-520 that is my original unit. It suffered some ROM bit
rot long ago and was not working, but I acquired the ROMs a while back
to repair the unit.
Now, though, as I pull it out for another project, it seems to be
misbehaving. It's like "address bit 1" on the input commands is acting
up. For instance, word 48 is "zero", and 49 is "one", but zero will be
followed by "three" and then "zero" and then "three" as one sends values
48,49,50,51 to the unit. I'm working to confirm the bit 1 on the cable
to the PC is not bad, but initial efforts point to it being the IC.
brain at jbrain.com
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