DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-2500 / Datamath Version 2 (Made in Spain)
|Date of introduction:||Refurbished||Display technology:||LED modules|
|New price:||3,190 pts (Oct. 1974)||Display size:||8|
|Size:|| 5.5" x 3.0" x 1.7"
139 x 76 x 42 mm3
|Weight:||12 ounces||Serial No:||AE 47105|
|Batteries:||4*AA NiCd||Date of manufacture:||wk 04 year 1975|
|AC-Adapter:||AC9110||Origin of manufacture:||USA|
|Program steps:||Courtesy of:||Philippe Leckler|
This Datamath Version 2 alias TI-2500 was manufactured in Spain and refurbished in 1975. Comparing the refurbished model with an original Datamath Version 2 manufactured in Spain revealed some unusual details:
|The date code reads: Refurbished in week 04 year 75 or Januaray, 1975.|
It should read:
|The printed circuit board (PCB) is the
standard 30367H layout used with all Datamath Version 2
But it was refurbished...
|The single-chip calculator circuit of the
refurbished Datamath with an unusual designation:
TMS0719 instead TMS0119.
Why this odd designation Probably made Texas in 1973 a small
mistake: The original Datamath Version 2 sported the TMS0119 calculator chip
with a ROM-Code ZA0052. With the introduction of the Datamath Version
3 the ROM-Code was changed to ZA0072 but the chip designation was kept
Two different software versions and one part name - problems are pre-programmed. We assume that Texas Instruments manufactured for repairs of the early Datamath Version 2 a batch of TMS0119 with the "old" ROM-Code ZA0052 and used the odd designation TMS0719 to avoid misunderstandings.
Recently fellow collector Bo Kristoffersen discovered a Datamath Version 2 (serial number 485344) sporting a 30367J PCB layout and the TMS0119 ZA0072.
Datamath™ is a trademark
of Texas Instruments.
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© Joerg Woerner, July 22, 2004. No reprints without written permission.