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Additional Pictures 

 

This Texas Instruments TI-88 "PVT 3 (Production Validation Test 3) Build" was manufactured in August 1982 by
Texas Instruments in Abilene, TX (Date code ATA 3282 » wk 32 yr 1982).

The two module ports of the TI-88 accommodate either Solid State Software modules or Constant Memory Expansion Modules.

The printed circuit board (PCB) of the TI-88 is centered
around three 4-bit microcontroller and one RAM and one ROM chip, each.

Close-up view of the Main Integrated Circuits of  the TI-88 "PVT 3 Build" with Serial Number 2023.

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.

The Constant Memory or CRAM-Module as user programmable memory with  either 1184 program steps or 148 user memories.

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 cover of the CRAM-Module removed.

The PCB of the CRAM Module with the 3 Volts backup battery.

The PCB of the CRAM-Module with the TP0531 RAM Chips.



The CROM-Module as pre-programmed software like the earlier TI-58C/TI-59  Solid State Software™ modules with 15,000 program steps.

 

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.

The cover of the CROM-Module removed.

 

The PCB of the Master Library Module with the TP0532 ROM Chip.


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If you have additions to the above article please email: joerg@datamath.org.

© Joerg Woerner, October 10, 2019. No reprints without written permission.