DATAMATH CALCULATOR MUSEUM
Montgomery Ward P200 aka TXI-8662A
|Date of introduction:||1974||Display technology:||LED-stick|
|New price:||Display size:||8|
|Size:|| 6.5" x 3.2" x 1.7"
166 x 81 x 44 mm3
|Weight:||7.5 ounces, 214 grams||Serial No:||47X-016035|
|Batteries:||3*AA NiCd or 4*AA Alkaline||Date of manufacture:||wk 33 year 1974|
|AC-Adapter:||AC9130 or AC9120||Origin of manufacture:||USA|
|Program steps:||Courtesy of:||Joerg Woerner|
|Download manual:||(US: 2.8 MByte)|
The P200 could be easily identified as a close relative of the
TI-2550. Both calculators use the same electronics, the same layout of the keyboard and even an identical
mold for the housing bottom. The different look is achieved through a new mold
for the upper half of the housing and a different style of the memory keys. The
color of the housing is slightly different, too.
Dismantling this Montgomery Ward P200 aka TXI-8662A calculator manufactured in August 1974 reveals a well-known internal construction. The printed circuit board (PCB) is 100% identical with the first edition of the TI-2550 introduced in 1974, too.
The electronics of the P200 is centered around the TMS0601 single-chip calculator circuit, TI's second generation succeeding the famous TMS1802.
Compare it with its scientific sibbling P300.
Don't miss the rare TXI-8661A based on the Exactra 23 calculator.
The featured calculator was donated in November 2011 by Scott Brainard. Thank you!
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.