DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Additional Pictures
| Close-up view
of the TMS0975NL ZA0356 AP single-chip calculator circuit used with the
Little Professor (Version A). PMOS Technology, 28-pin DIP 4-bit Microcontroller, 1,024*8 Bits Instruction ROM, 64*4 Bits Data RAM.  |
Die Photo of the
TMS0970D/TMS0975A
courtesy of
Sean Riddle. |
Die Photo (after acid)
of the
TMS0970D/TMS0975A
courtesy of
Sean Riddle. |
| Close-up
view of the TMS0975NL ZA0356 AP single-chip calculator circuit used with the
Little Professor (Version B). PMOS Technology, 28-pin DIP 4-bit Microcontroller, 1,024*8 Bits Instruction ROM, 64*4 Bits Data RAM.  |
Die Photo of the
TMS0970D/TMS0975B
courtesy of
Sean Riddle. |
Die Photo (after acid)
of the
TMS0970D/TMS0975B
courtesy of
Sean Riddle. |
| Close-up view
of the TMS0975NL ZA0356 CSP single-chip calculator circuit used with the
Little Professor (Version C). PMOS Technology, 28-pin SPDIP 4-bit Microcontroller, 1,024*8 Bits Instruction ROM, 64*4 Bits Data RAM.  |
Die Photo of the
TMS0970D/TMS0975C
courtesy of
Sean Riddle. |
Die Photo (after acid)
of the
TMS0970D/TMS0975C
courtesy of
Sean Riddle. |
If you have additions to the above article please email: joerg@datamath.org.
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