DATAMATH CALCULATOR MUSEUM |
Additional Pictures
The printed circuit board of the
early Spelling B sold in UK is identical with the original "US" Spelling B and misses the buzzer, too. |
The Spelling ABC sold in UK is
centered around a TMC0274
single-chip microcomputer and an external TMC0355 (CD2602) 128kBit "Speech-ROM". |
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|
The printed circuit board of the
German Spelling ABC is
identical but uses a different TMC0355 (CD2607) 128kBit "Speech-ROM". |
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, February 13, 2005. No reprints without written permission.