Julia Sets
This is the Julia set equivalent to “Mandelbrot FFP”.
Timex/Sinclair 1000
Invaders
Fred Nachbaur’s Christmas present to his customers in 1987. This one’s claim to fame is that it used the SHREB package, but most of the program runs in machine-code, demonstrating that the SHREB package is a useful library of graphics routines as well as a BASIC extension. This program has a bug that’s so charming
Hi-Res Chess
The classic Psion Chess game, with actual chess pieces on an actual board! Fred stretched Wilf’s routine to give 26 display rows… 24 for the board, and 2 for the input lines, so you have to key your moves in blind… not too much of a handicap, if you’ve played the original. To exit, press
Dragons
The classic fractal dragons program, written by Greg Harder. Runs in 16K, but 32K recommended for larger dragons.
Common-Emitter Transistor Amplifier
Design and analysis of common-emitter transistor amplifiers.
Common-Emitter Transistor Amplifier Read More »
Calendar
“Year-at-a-Glance” calculates any given year, showing the whole year on a single screen. Press “M” to give the “month” legends, “D” for day-of-the-week. Move the cursor around the calendar to highlight any date, then press ENTER – you’re shown your appointments or other significant events for that date. Move the cursor to a non-date field,
Blackjack (1000)
Adapted from a similar game Fred Nachbaur had written earlier for the first TRS-80 Pocket Computer. This is a direct application of Greg Harder’s “SRAM Hi-Res Extended BASIC” (aka SHREB) that demonstrates just a few of the cool things you can do with this package. Runs in a standard 16K ZX81 or equivalent, plus 8K
Bi-Plot Demo
This is a demonstration of a WRX16 display option. The 8K hi-res display file is divided into two 4K chunks, which are displayed on alternate frames to give a neat overlay effect. The lower six lines are standard low-res.