Commodore SR-4148
| Manufacturer: | Commodore Business Machines (USA) |
| Mfg. date: | 1975-78 |
| Size: | 8,1×15,2×3,4 cm |
| Weight (ready for operate): | 225 g |
| Type: | scientific |
| Capacity: | 10/10+2 digits (input/display) 12/12+2 digits (internal precision) |
| Operating logic: | algebraic |
| CPU: | Commodore GHU-03A + GHU-01A |
| Registers: | 2 standard (with saving the pending operation) 2 bracket (with saving the pending operation) 2 memory (with aritmetic) |
| Features: | +/-change sign (direct entry of negative numbers) RVexchange registers (X-Y) Ffloating-point notation Sciscientific (exponential) notation Sqrsquare root x2square pivalue of pi (3.1415..) can be recalled 1/xreciprocal trigtrigonometrical functions (sin, cos, tan and inverses: arcsin, arccos, arctan) logexponential and logarithmical functions (10- and e-base) yxraising to power SDone variable statistics: calculating mean and standard deviation P-Rconverting coordinates between rectangular and polar systems |
| Display: | 10+2+2 digit LED |
| Power: | 3×AA NiCd rechargeable battery (built-in) |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 60.0011368342 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.00688022153E-70 |
Commodore SR-4148
Inside of the SR-4148 with the rechargeable batteries
Inside of the SR-4148 with the CPU
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