Digitalker 54104 IC

Henk Gooijen henk.gooijen at
Sat Feb 13 14:43:20 CST 2021

I know the SP0256-AL2 (it is a zero not an “ooo”).
That chip is a phoneme generator and it was described in a BYTE issue.
It has (IIRC) 6 “data” inputs to select one of the 64 stored phonemes,
and a strobe signal. Depending on the suffix (here “-AL2”) it contains
certain phonemes and can co-operate with external premanufactured
Speech ROMs. You can google for more info on the SP0256-AL2.
The “-AL2” was the generic phoneme chip, I used it in my StarShip back
In theearly ’90-ties. *very* robotic speech 😊
Note that the chips needs an external Xtal of somewhat odd frequency,
but I think it will work with an Xtal of (again IIRC) 3.2 MHz.

Van: Bill Gunshannon via cctalk<mailto:cctalk at>
Verzonden: zaterdag 13 februari 2021 18:05
Aan: cctalk at<mailto:cctalk at>
Onderwerp: Re: Digitalker 54104 IC

On 2/13/21 11:44 AM, ED SHARPE via cctalk wrote:
> Bill...this just  struck a memory I think I have a Radioshack Digitalker in a packaging  but recall it being just one large chip...  Ed #    SMECC

The one I have in front of me is the SPO256-AL2 (actual chip is labeled
SPO256-017) and the package includes an SPR016-117 which is listed as an
External Serial Speech ROM.  Would probably be fun to hook it up to an
Arduino and see what it has to say.  :-)


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