Texas Instruments

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Model: TI-450 Battery: Adapter: 120 vac Year: 1974Chip: TMS0203, TMC0322 Info:

desktop line

Model: TI-500 Battery: Adapter: 120 vac Year: 1974Chip:TMS0203, TMS0221, TMC0305 Info: This rare TI-500 was introduced in the year 1974 and seems to be a sibling of the TI-450 and TI-620.The TI-500 is based on the TMS0200 Chipset for 12-digit desktop calculators but misses the usual 12-digit display. Related calculators using this chip set are the SR-20 and SR-22. The first usage of the TMS0200 Building Blocks were the TI-4000 and the Canon 121F. The architecture found in this TI-500 differs greatly from these calculators, it uses the Data Chip TMS0203, ROM Chip TMC0305, adding the Printer Chip TMS0221 to control the drum printer.