DATAMATH CALCULATOR MUSEUM |
Additional Pictures
This Texas Instruments TI-88 "PVT 1 (Production
Validation Test 1 Firmware Engineering Device) Build" was manufactured
in May 1982 by
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The two module
ports of
the TI-88 accommodate either Solid State Software modules or Constant Memory Expansion Modules. |
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The printed circuit board
(PCB) of the TI-88 is centered around two 4-bit microcontroller, two RAM and one ROM chip, each.
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Close-up
view of the Main Integrated Circuits of the TI-88 "PVT 1 Build Firmware
Engineering Device" with
Serial Number 02 693.
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The rechargeable battery pack of the TI-88 with just one AA-sized NiCd battery in a small plastic housing. | |
The rear
view of the TI-88 with both the Modules and rechargeable battery removed.
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The Constant Memory or
CRAM-Module as user programmable memory with
either 1,184 program steps or 148 user memories.
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The 11 contacts of the Constant Memory or CRAM-Module with Power Supply, 4 Data I/O-lines, 2 Chip Select signals, Clock and Serial I/O. |
The
CROM-Module as pre-programmed software like the
earlier TI-58C/TI-59 Solid State Software™ modules with up
to 15,000
program steps.
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The 11 contacts of the
Solid State Software or CROM-Module with Power Supply, 4 Data I/O-lines, 2 Chip Select signals, Clock and Serial I/O. |
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, December 21, 2020. No reprints without written permission.