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CIDCO MailStation

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We've got a one of these that might be fun. http://en.wikipedia.org/wiki/Cidco_MailStation

Interfaces

POTS Modem, DB25 (parallel port), speaker

Onboard chips

Winbond W24257AS-35 -- 32K X 8 High-Speed CMOS Static RAM
Winbond W24010S-70LE -- 128K X 8 RAM SRAM

RSDRD 3SI176 -- CPU . Claimed to be a custom variant of a Z80 by http://www.electronicspoint.com/need-datasheet-rsdrd-3si176-t13318.html ?

28SF040 -- 4Mb SuperFlash EEPROM
29F080A-90PFTN -- appears to be another flash chip, though details are somewhat hard to find

RCV336ACFW -- Rockwell integrated modem.

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