And, since the software was all in eprom there wouldn't be means for upgrading without burning new eproms. I wonder what speech synthesizer they used suppose must have been based on the long dead TI SPo256. Tom Fowle On Tue, May 24, 2016 at 09:55:46PM -0700, Gregory Nowak wrote: > Interesting to know what the cpu actually was. I knew it was z80/z180 > compatible, but that's it. As far as the clock speed, someone once > told me the Blazie units ran at 6-8 MHz, 12 MHz if you got the double > speed upgrade. > > Greg > > > On Tue, May 24, 2016 at 08:31:47PM -0700, Tom Fowle wrote: > > I worked on a project to try to develop a TTY modem for the Braille Lite, > > Dean was extremely tight about giving me any info about how the lite was > > done. I believe they used a Hitachi HD64180 microprocessor which was a Z80 > > offshoot. Pretty sure they had no more than about 2 megs of ram and probably > > 64K of eprom Don't know about the clockspeed but bet it was pretty kreeky. > > I don't believe it was ever field upgradable, Dean said something to me > > about using Ymodem to upload programs and having nothing but trouble with > > it. > > Considering the instability of the hardware I think it'd be a bucket of > > squashed worms. > > Tom fowle > > > -- > web site: http://www.gregn.net > gpg public key: http://www.gregn.net/pubkey.asc > skype: gregn1 > (authorization required, add me to your contacts list first) > If we haven't been in touch before, e-mail me before adding me to your contacts. > > -- > Free domains: http://www.eu.org/ or mail dns-manager@xxxxxx > _______________________________________________ > Speakup mailing list > Speakup@xxxxxxxxxxxxxxxxx > http://linux-speakup.org/cgi-bin/mailman/listinfo/speakup _______________________________________________ Speakup mailing list Speakup@xxxxxxxxxxxxxxxxx http://linux-speakup.org/cgi-bin/mailman/listinfo/speakup
