Early Electronic Calculator Desktop Calculator Photo Gallery

Miida MC800 1971 Logic Technology: LSI-3 Memory Technology: LSI Display: VFI Regrettably, years ago I threw out the case and keyboard for my unit of this calculator, due to problems with the keyboard, but kept the electronics. Another calculator enthusiast was able to identify the model number and provide the photos.

Monroe 610 1971 Logic Technology: LSI-4 Memory Technology: LSI Display: NIX A nice space-agey-design NIXIE desktop. One of the last calculators to use a NIXIE display, and similarly a little unusual in combining a NIXIE display with LSI chips.

Victor 18-3441 1971 Logic Technology: LSI-7 Memory Technology: LSI Display: PRI I suspect the LSI chip-set utilised in this calculator is an example of Rockwell's first version of the PPS4 processor series. This speculation is based on some correlations with ICs from the later PPS4/2 version.

Miida MC840 1972 Logic Technology: LSI-3 Memory Technology: LSI Display: VFM A straighforward little desktop in terms of functionality, but a unique, modernistic 'wedge' case design. Electronically, this model is very similar to a predecessor, the MC800. The chipsets are nearly identical and the keyboard construction is the same. The display tubes and display drivers are different.

Rapidman 1208 LC 1972 Logic Technology: LSI-3 Memory Technology: LSI Display: LCD This model is notable for very early use of an LCD display. Too early one might say, all 3 of the units in my possession utilising these displays have only partially operable displays, bubbles having developed in the liquid crystal. The same electronics as the Lloyd's Accumatic 70 but packaged in a different case.

Toshiba BC-0802 1972 Logic Technology: LSI Memory Technology: LSI Display: VFI

Addmaster Simplex 12 1973 Logic Technology: LSI-2 Memory Technology: LSI Display: PPX2

Commodore US*1 1973 Logic Technology: LSI Memory Technology: LSI Display: PPX2

Commodore US*10 1973 Logic Technology: LSI Memory Technology: LSI Display: PPX2

Eldorado 8K 1973 Logic Technology: LSI Memory Technology: LSI Display: PPX2

Facit 1114J 1973 Logic Technology: LSI Memory Technology: LSI Display: VFI A cute, solidly-built little model, but this unit developed a problem years ago. There's no display visible in the photo because there's nothing in there - it's an empty case. As a kid I pilfered the display tubes and transformer from this unit to make a digital clock. The clock is doing just fine, it's been running almost continuously for 30 years now.

Lloyd's Accumatic 70 1973 Logic Technology: LSI-3 Memory Technology: LSI Display: LCD Same electronics (and problems with the LCD display) as the Rapidman 1208LC, but different case.