Atom Speech Synth

discussion of games, software, hardware & emulators relating to the Acorn Atom and Acorn System machines.
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danielj
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Atom Speech Synth

Post by danielj » Fri Apr 15, 2011 9:56 am

So, as a relatively straight forward toe-in-water project for the atom, I've decided to knock together a circuit to use the SP0256 speech synthesiser chip based on the diagrams at http://www.bbcdocs.com/hardware.htm...

This is designed to work with the SP0256-AL2 (cheapest I've seen this is about £30) variant which is programmed with allophones, in my slight ignorance I've picked up an SP0256A-080 which is programmed with...? Who knows. Answers on a postcard. Anyone wish to hazard a guess at what the pre-programmed content of this beast is before I put it through it's paces?

d.

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sirmorris
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Re: Atom Speech Synth

Post by sirmorris » Fri Apr 15, 2011 11:24 am

NOS SPO256s
£10 here, last item on page.

http://www.sciencestore.co.uk/acatalog/ ... 4wodCi_meQ


C

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oss003
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Re: Atom Speech Synth

Post by oss003 » Fri Apr 15, 2011 11:44 am

Hi guys,

if you need any info about the hard- and software to control the SP256 with the 6522 VIA, have a look at:

http://www.acornatom.nl/atom_handleidin ... speech.htm

Greetings
KC

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Re: Atom Speech Synth

Post by Prime » Fri Apr 15, 2011 11:49 am

sirmorris wrote:NOS SPO256s
£10 here, last item on page.

http://www.sciencestore.co.uk/acatalog/ ... 4wodCi_meQ
That's not bad, might pick up a couple as spares, I have a CoCo/Dragon speech / sound cart that has the SP0256 in, and also a very early GI PIC, before they where bought by Microchip, said PIC takes normal English and converts it to alaphones before feeding to the speech chip. Have to check to see if the source (or even a disassebled binary) was available as it should be possible to port to a more modern PIC, or to 6502 for that mater.....

I have the schematic too, as this was in the days when Tandy printed schematics in the manual, should be prety easy to adapt for 6502 based machines, as the 6809 as almost the same bus...both it and the 6502's busses where based on the earlier 6800......

Cheers.

Phill.

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MartinB
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Re: Atom Speech Synth

Post by MartinB » Fri Apr 15, 2011 6:36 pm

From the picture and text, this advert suggests the 080 is programmed the same as the AL2. There's a full datasheet too which specifically refers to the AL2 but maybe there's no real difference?

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danielj
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Re: Atom Speech Synth

Post by danielj » Sat Apr 16, 2011 6:59 am

MartinB wrote:From the picture and text, this advert suggests the 080 is programmed the same as the AL2. There's a full datasheet too which specifically refers to the AL2 but maybe there's no real difference?
Yes, I think that's the person who I bought mine from... And I think he's got his part #s mixed up. Some of them have the allophone set in too as well as specific words. Currently I've got mine hooked up to an arduino and it seems to just be able to say "six" and "three" and no allophones, but I think I'm doing something screwy with the address lines so I'm rejigging the program... Although I guess it's possible someone had an application where they just wanted something to say six and three :?

Edit: actually, it's not - I paid $12, but the words are exactly the same as were used on the ebay listing...

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