Digitalker 54104 IC

Bill Gunshannon bill.gunshannon at
Sat Feb 13 14:52:10 CST 2021

On 2/13/21 3:43 PM, Henk Gooijen wrote:
> I know the SP0256-AL2 (it is a zero not an “ooo”).

Yes, the Wiki points that out.

> That chip is a phoneme generator and it was described in a BYTE issue.

Do you remember which 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 😊

Just so it doesn't sound like Hawking.

> 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.

Diagrams that come with it show 3.12mhz. Not much off of 3.2 which could
probably be trimmed if needed,

I may  never get around to playing with it but one never knows.  I
have a couple of rasPivoice which I never got a chance to pla
with and they are a lot easier to handle.  :-)


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