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OPD piggy-back board?
Posted: Tue Feb 14, 2023 4:59 pm
by twellys
Just trawling the ebay when I saw this:
https://www.ebay.co.uk/itm/175611364802
* ICL ~1984
* PSION
* 68008
So, OPD piggy-back board?
Re: OPD piggy-back board?
Posted: Tue Feb 14, 2023 5:15 pm
by Chr$
Yes, that's the OPD CPU daughter board, which contains the 68008 CPU, 4 PROM chips and one of the 2 TMS speech chips (plus a few 74x logic chips).
The speech chip is the one that generates the actual speaking (as used in the BBC micro). The other speech chip, which contains the vocabulary of words, is normally underneath it on the main m/b. I've just recently been exploring dumping the contents of the OPD vocab chip using a BBC Model B.
Re: OPD piggy-back board?
Posted: Tue Feb 14, 2023 5:19 pm
by twellys
Thanks Chr$!
Re: OPD piggy-back board?
Posted: Fri Feb 17, 2023 4:33 pm
by Derek_Stewart
Hi,
Just need to take the QL 68008 CPU out and fit the OPD board, write a driver to drive the speech rom, or maybe have a QL OPD....
Re: OPD piggy-back board?
Posted: Fri Feb 17, 2023 4:52 pm
by Chr$
See my topic that shares the complete OPD ROM plus the Speech Phrase-ROM.
viewtopic.php?t=4365