DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Texas Instruments PS-6960Si
| 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
0.70" 85 x 129 x 18 mm3 |
||
| Weight: | 4.6 ounces, 130 grams | Serial No: | |
| Batteries: | 2*CR2032 | Date of manufacture: | mth 07 year 1997 |
| AC-Adapter: | Origin of manufacture: | Thailand (C) | |
| Precision: | 12 | Integrated circuits: | CPU: Toshiba T6M88 ROM: AB23512 RAM: 2*EPSON SRM20100 |
| Memories: | 256kB RAM | ||
| Program steps: | Courtesy of: | Joerg Woerner |
The
PS-6960Si replaced the earlier PS-6800 within one year
and doubled the memory capacity to 256k Byte.
The changes are minor:
| • he
PS-6155 Dock-station
cradle to synchronize data with the Lotus Organizer 97 software was optimized. • The display of the organizer supporting 6 lines by 24 characters was enhanced with a greenish backlite feature called Indiglo. |
Dismantling
this PS-6960Si manufactured in 1997 by Compal
Electronics in Thailand reveals no surprises. The printed circuit board
(PCB) looks very familiar to us and we identify the major components
immediately.
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
program memory is labeled AB23512 0055,
probably an OTP-ROM with a capacity of 64k
Bytes. The original PS-6700
makes use of the ATMEL
AT27C512 OTP-ROM.
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-6960Si hosts
two EPSON SRM20100 chips sporting a capacity of 128k Bytes, each.
The
PS-6960Si uses two driver chips in
Chip-on-Board (COB) technology on the Main-PCB, we couldn't identify the
manufacturer and type of them.
The PS-6965Si Personal Organizer & PC Connectivity Kit bundled the PS-6960Si with the PS-6155.
It took another year until the PocketMate 400 appeared with a better keyboard layout.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, October 28, 2009. No reprints without written permission.