DATAMATH CALCULATOR MUSEUM
Texas Instruments PS-6860Si
|Date of introduction:||1996||Display technology:||LCD dot matrix|
|New price:||Display size:||6 lines by 24 char|
|Size:|| 3.3" x 5.1" x
85 x 129 x 18 mm3
|Weight:||4.6 ounces, 130 grams||Serial No:|
|Batteries:||2*CR2032||Date of manufacture:||year 1996|
|AC-Adapter:||Origin of manufacture:||Taiwan (C)|
|Precision:||12||Integrated circuits:|| CPU: Toshiba T6M88
ROM: Macronix MX27C512
RAM: Samsung KM681000
|Program steps:||Courtesy of:||Joerg Woerner|
PS-6860Si replaced the earlier PS-6800 within one year.
The changes are minor:
cradle to synchronize data with
the Lotus Organizer 97 software was optimzed.
• The display of the organizer supporting 6 lines by 24 characters was
enhanced with a greenish backlite feature called Indiglo.
this PS-6860Si manufactured early in 1996 by Compal
Electronics in Taiwan reveals no surprises. The printed circuit board
(PCB) looks very familiar to us and we identify the major components
The hardware resembles more or less its predecessor PS-6800 but is centered around a Toshiba T6M88 Application Specific CPU based on the 8-bit Z80 core instead the previous T6M76.
The pictured PS-6860Si uses a Macronix MX27C512 program memory, an OTP-ROM with a capacity of 64k Bytes. Later products use a chip marked with AB23512.
The data memory of the PS-6760Si, PS-6860Si and PS-6960Si are specified with 64k Bytes, 128k Bytes resp. 256k Bytes - the layout of the printed circuit board (PCB) suggests immediately the technical solution: The PCB accommodates one or two different sized memory chips in a very flexible configuration, this PS-6860Si hosts one Samsung KM681000 chip sporting a capacity of 128k Bytes.
The PS-6860Si uses two driver chips in Chip-on-Board (COB) technolgy on the Main-PCB, we couldn't identify the manufacturer and type of them.
It took another year
until the PocketMate 300 appeared with a better keyboard
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© Joerg Woerner, June 25, 2002. No reprints without written permission.