ZX Compiler
Convert BASIC programs to machine language. Increases execution speed. 16K.
Timex/Sinclair 1000
Common-Emitter Transistor Amplifier
Design and analysis of common-emitter transistor amplifiers. Biasing, stability, frequency response, input/output resistances, power dissipation, and thermal effects taken into account. Prints schematic and Hybrid-Pi equivalent circuit, stores up to five different transistor spec sheets. 16K.
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Electronic Circuit Design Programs
Programs for computer-aided-design of active filters (Bessel, Butterworth, Chebyshev). Also design pads and attenuators; state-variable, staggertuned, and notch filters; amplifiers, 555 timers, yagi antennas; regulators; and heat sink parameters. Many draw schematic on screen. 16K.
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EZ-Mail
Software to use USPS’s E-Com (Electronic Computer Originated First Class Mail) service. 64K.
Multiple Regression Analysis
Max or min up to 48×48 tableau. Tableau must be in standard form. 16K.
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Simplex Algorithm
Gives coefficients for up to 10 variables (up to 100 observations per variable). Also gives F statistic for dependent variable. T statistic for each coefficient (and constant term) coefficient of determination and standard deviation of dependent variable. 16K.
Sinclair ZX81 Desk Console
Work station for the computer, power supply, printer, cassette recorder, RAM pack and accessories. An on/off switch with LED; SAVE/RUN-LIST/LOAD switch simplifies saving and loading.
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