Digitalker 54104 IC

On 2/13/2021 3:13 AM, ED SHARPE via cctalk wrote: -------- Forwarded Message -------- Subject: Digitalker 54104 IC Date: Tue, 9 Feb 2021 22:02:20 -0600 From: Jim Brain <brain at jbrain.com> To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> 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. Jim -- Jim Brain brain at jbrain.com www.jbrain.com -- Jim Brain brain at jbrain.com www.jbrain.com