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Sinclair Scientific
1974
The Sinclair Scientific, a low-cost 1974 pocket calculator that squeezed scientific functions onto a TI calculator chip.
Sinclair Scientific Online Emulator
Play Sinclair Scientific using JavaScript directly in your browser.
Controls
Boots the 1974 Sinclair Scientific calculator to its "0." display. It runs the actual TMS0805 microcode Ken Shirriff recovered from the chip. The Sinclair is reverse Polish (RPN): key a number, press an operator. The scientific functions live on the ▲ (arc) and ▼ keys — see the original manual. Use the on-screen keypad or your keyboard, or open the debugger to single-step the chip and watch its three BCD registers shuffle digits.
Configurations
| Configuration | Emulator | Machine | OS | Legal | |
|---|---|---|---|---|---|
| Sinclair Scientific (boots to 0.) | Sinclair Scientific | Sinclair Scientific | grey | Open ⛶ |
Chips
Emulators
| Emulator | Type | License | Site |
|---|---|---|---|
| Sinclair Scientific | online | GPL-2.0 | Website ↗ |