Texas instruments TM 990/189 with power supply Tested Working! Serial # 0145A 😲
Texas instruments TM 990/189 with power supply Tested Working! Serial # 0145A 😲
Texas instruments TM 990/189 with power supply Tested Working! Serial # 0145A 😲
Texas instruments TM 990/189 with power supply Tested Working! Serial # 0145A 😲
Texas instruments TM 990/189 with power supply Tested Working! Serial # 0145A 😲
Texas instruments TM 990/189 with power supply Tested Working! Serial # 0145A 😲
Texas instruments TM 990/189 with power supply Tested Working! Serial # 0145A 😲
Texas instruments TM 990/189 with power supply Tested Working! Serial # 0145A 😲
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  • Load image into Gallery viewer, Texas instruments TM 990/189 with power supply Tested Working! Serial # 0145A 😲
  • Load image into Gallery viewer, Texas instruments TM 990/189 with power supply Tested Working! Serial # 0145A 😲
  • Load image into Gallery viewer, Texas instruments TM 990/189 with power supply Tested Working! Serial # 0145A 😲
  • Load image into Gallery viewer, Texas instruments TM 990/189 with power supply Tested Working! Serial # 0145A 😲
  • Load image into Gallery viewer, Texas instruments TM 990/189 with power supply Tested Working! Serial # 0145A 😲
  • Load image into Gallery viewer, Texas instruments TM 990/189 with power supply Tested Working! Serial # 0145A 😲
  • Load image into Gallery viewer, Texas instruments TM 990/189 with power supply Tested Working! Serial # 0145A 😲

Texas instruments TM 990/189 with power supply Tested Working! Serial # 0145A 😲

Regular price
$1,450.00
Sale price
$1,450.00
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This should be in a museum since it is such a great historical piece. This unit is an early serial number tested working machine with the power supply and cord. See pictures for condition. 
Years of production: ~1978-1981 Display type: 7-segment
New price:   Display color: Red
    Display technology: LED
Size: 8"×11"×1" Display size: 12 digits
Weight: 10 oz   
   
    Entry method: N/A
Batteries: N/A Advanced functions: N/A
External power: TI adapter (+5V, -12V, +12V) Memory functions: N/A
I/O: I/O port, cassette port    
    Programming model: Machine code
Precision: N/A Program functions: Machine code monitor
Memories: 1 kB
Program display: Machine code monitor
Program memory: 1 kB
Program editing: Machine code monitor
Chipset:   Forensic result:
This may look like a calculator - the keyboard is from a TI-59 calculator - but it's a training system for the TMS 9980A processor. 

Features. 
  • 1024 bytes of RAM, expandable to 2048 bytes. 
  • 4096 bytes of ROM, expandable to 6144. 
  • 2 MHz crystal controlled clock. 
  • Audio cassette interface. 
  • 16 bit programmable I/O port and interrupt monitor (TMS 9901). 
  • 45 key alphanumeric keyboard. 
  • Ten digit, sever segment LED display. 
  • Visual and audio output. 
  • Resident system monitor and assembler. 
  • Single step instruction execution. 

This board is co-branded Radio Spares.

Manufacturer: Texas Instruments