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SCM Marchant 1016PR Programmable Printing Calculator Data Sheet




Data Sheet for the SCM 1016PR Calculator
Mid-1969.

The 1016PR was SCM's first in-house designed and built programmable calculator, introduced sometime in the mid-part of 1969. Prior to the introduction of the 1016PR, SCM sold a re-badged version of the West-German Diehl Combitron programmable printing calculator as the Marchant Cogito 566PR.

The 1016PR is a sixteen digit, fixed decimal (with 0, 2, 4, 6, 8 or 10 digits behind the decimal point), five function (including square root) printing calculator with learn-mode programmability. It is implemented using small-scale integrated circuit logic, with magnetic core memory for storage of working registers and program steps. The printing mechanism is a line-at-a-time mechanism, printing at approximately one line per second. Printing is accomblished by individual wheels containing the digits and symbols which rotate into the proper position, and once all of the print wheels are in position, the wheels are moved forward to press the digits against the ribbon, which transfers the the ink in the shape of the digits onto the paper. The 1016PR uses a unique (and proprietary) ribbon arrangement, with the ribbon spools containing an absorbant fabric that is saturated in ink, with a continuous loop of fabric ribbon stretching between and around the spools that gets soaked in the ink as it is in contact with the spools, and is advanced at the end of each print cycle. The same printing mechanism was using in the earlier SCM Cogito 616 and Cogito 516 printing calculators. The machine has six accumulator-style memory registers, and up to 100 steps of program storage space. Programming features include conditional test and branch instructions. The calculator can be connected to an optional magnetic tape cartridge drive (called IOTA, which stands for Input- Output Tape Accessory) that allows programs to be stored or loaded to tape. The use of magnetic core memory for program step storage allows the calculator to be powered off while still retaining the stored program due to the non-volatile nature of magnetic core storage.

The 1016PR was initially priced at $2,795 at introduction, and was reduced in price to $2,495 by early 1971, and $2,395 by early '72. In the first quarter of 1970, an updated version of the Cogito 1016PR was introduced, known as the Cogito 1016PR-AS, with "AS" standing for "Additional Storage". The AS version was identical to the earlier model in terms of appearance and function, but the size of the Magnetic Core Memory storage was increased, providing an additional 100 steps of program storage space, for a total of 200 steps. The Cogito 1016PR-AS was introduced at $2,695, with the sales price dropping to $2,495 by late 1972.