DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Additional Pictures
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This Texas Instruments TI-88 "EVT 1 (Engineering
Validation Test 1) Build" was manufactured
in April 1982 by
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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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| The alphanumerical
LC-Display in connected with just 5 pins to the Main PCB
of the TI-88. The keyboard technology with wired embedded in plastic and snap-domes is well known from the TI-55-II.
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Close-up
view of the Main Integrated Circuits of the TI-88 "EVT 1 Build" with Serial Number
NTC-3-4-30-82.
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| The
rechargeable battery pack of the TI-88 with just one AA-sized NiCd battery in a small plastic housing.
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| 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.  |
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cover of the CRAM-Module removed.
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The PCB of the CRAM Module with the 3 Volts
backup battery. |
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PCB of the CRAM-Module with the TP0531 RAM Chips.
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| 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.  |
| The
cover of the CROM-Module removed.
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The PCB of the Master Library Module with the TP0532
ROM Chip. |
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, October 11, 2019. No reprints without written permission.
