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Texas Instruments TI-95 PROCALC

Date of introduction:  1987 Display technology:  LCD dot matrix
New price:  $200.00 (SRP 1988) Display size:  16 (10 + 2)
Size:  3.7" x 8.0" x 1.0"    
Weight:  11 ounces Serial No:  0000202
Batteries:  4*AAA Date of manufacture:  mth 05 year 1987
AC-Adapter:   Origin of manufacture:  Taiwan (I)
Precision:  13 Integrated circuits:  CPU: TMC70011
 ROM: HN61256
 RAM: HM6264
Memories:  900-0    
Program steps:  0-7200 Courtesy of:  Joerg Woerner

May we call this huge portable computer a calculator ? No doubt, the TI-95 Procalc introduced in the year 1986 is a powerful, keystroke programmable calculator. Some ideas of the early TI-58 calculator and the never introduced TI-88  influenced the TI-95 PROCALC: 

TI-95_Modules_1.jpg (33914 Byte)You’ll find an expansion port to install either RAM or ROM-cartridges and you may connect a printer PC-324 to the calculator. 

TI-95_PCB.jpg (169422 Byte)Already without any expansion the TI-95 features up to 8 kByte of memory, the expansion adds another 8 kByte. The display uses a 5*7 dot matrix instead the normal 7-segment design to give full alphanumerical capability. A close relative to the TI-95
PROCALC, the TI-74 BASICALC explains the typewriter style keyboard.

The TI-95 PROCALC System uses the following components:

Part New price Description
PC-324 $115.00 (SRP 1988) 24-column thermal printer
AC9201 $19.00 (SRP 1988) Mains adaptor for PC-324
TP-324 $6.00 (SRP 1988) Thermal paper for PC-324
CI-7 $35.00 (SRP 1988) Cassette Interface
CM-8 $50.00 (SRP 1988) 8k Constant Memory Module (RAM)
Mathematics $50.00 (SRP 1988) Library (ROM)
Statistics $50.00 (SRP 1988) Library (ROM)
Chemical $50.00 (SRP 1988) Library (ROM)
TI-892F $114.95 (SRP 1988) 32k programmed EPROM Module (First)
TI-892D $84.95 (SRP 1988) 32k programmed EPROM Module (Dupl.)
TI-892E $76.95 (SRP 1988) 32k programmed EPROM Module (Bulk)

Only 3 years later Texas Instruments introuced with the TI-81 their first Graphing calculator and it took another 5 years till we got the unbelievable TI-92.

Emulating a TI-95

If you don't own a TI-95 calculator - emulate it ! 

 

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

© Joerg Woerner, December 5, 2001. No reprints without written permission.