DATAMATH CALCULATOR MUSEUM
|New price:||Display size:||8 (5 + 2)|
|Size:||5.8" x 2.6" x 0.75"|
|Weight:||4.4 ounces||Serial No:|
|Batteries:||2*AA||Date of manufacture:||year 1980|
|AC-Adapter:||EA-10B||Origin of manufacture:||Japan|
|Program steps:||Courtesy of:||Joerg Woerner|
At first glance this early Sharp EL-503 scientific calculator looks not really exciting. A bulky housing, a very limited keyboard with just 28 keys and a LCD display with only 8 digits ranks the EL-503 even in the 1979/80 timeframe at the lower end of the list.
the EL-503, on the other hand, reveals a big surprise: This calculator makes use
of a Texas Instruments TP0327 single-chip calculator circuit based on the TMS1000
Microcomputer family. The TP0320
architecture was introduced in 1978 and powered the Slimline calculators family
centered around the Texas Instruments TI-50,
and Business Analyst II.
Running Mike Sebastian's "Calculator forensics" gives a result of 9.177087103, well-known since the TI-30 introduced in 1976.
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© Joerg Woerner, November 3, 2008. No reprints without written permission.