Useful software for Sinclair ZX80 and Tynemouth Minstrel 2:
hexld3- a version of Toni Baker's HEXLD3 program, suitable for the ZX80 (with 4K ROM) for writing machine code.linear-algebra- a simple implementation of Gaussian elimination and back substitution for solving linear systems, suitable for the ZX80 (with 'floating-point' 8K ROM) or the ZX81.sunrise-sunset- a simple program to compute sunrise and sunset times on any date at any location. Suitable for the ZX80 (with 'floating-point' 8K ROM) or the ZX81.zeller- an implementation of Zeller's Congruence for working out the dayname corresponding to a date, suitable for the ZX80 (with 4K ROM).