TI-59 Software Collection

The opening entry in the competition (52-Notes V3N5).

Requires the PC-100/PC-100C printer.

A second V3N5 entry, Lou Cargile's first attempt at the calendar problem.

Requires the PC-100/PC-100C printer.

A third V3N5 entry, checking for the ML module and warning the user if it's missing.

Requires the PC-100/PC-100C printer.

V3N6: a faster print-buffer packing approach, down to about 7½ minutes per year.

Requires the PC-100/PC-100C printer.

V3N6: Vanderburgh folds in Panos Galidas' doubled print-code method and further tightens it, to about 5½ minutes per year.

Requires the PC-100/PC-100C printer.

V3N6: a correction to an earlier entry — a missing CLR' meant the 1st of a month could fail to print if it fell on a Thursday.

Requires the PC-100/PC-100C printer.

V3N7: the fastest of the series, averaging 2 minutes 38.6 seconds per year over a five-year test span.

Requires the PC-100/PC-100C printer.

Prints the full TI-59 print-code table with row and column headers.

K-J Meusch's version of the character table, using Fast Mode to print far faster than normal execution (TI PPC Notes V5N9-10, 1980).

Requires the PC-100/PC-100C printer.

Peter Poloczek's 3-D surface plotter for the PC-100, built on the printer-interrupt trick (TI PPC Notes V8N2, 1983). Load Part 2 after this one finishes, without resetting.

Requires the PC-100/PC-100C printer.

The second half of Poloczek's 3-D plotter. Requires Part 1 to have already run in the same session.

Requires the PC-100/PC-100C printer.

Dave Leising's print-code table showing each character both normally and interrupted mid-print (PPX Exchange, March/April 1982).

Requires the PC-100/PC-100C printer.

Richard Snow's demonstration of PC-100 graphics capability, drawing a flag using the printer-interrupt technique (TI PPC Notes V6N4-5, 1981).

Requires the PC-100/PC-100C printer.

Frank Dever's high-resolution “TI” logo (PPX Exchange, March/April 1982). The program corrupts a program-step keycode on purpose to redirect the ROM's dispatcher mid-instruction — the file's header traces exactly which ROM address that lands on.

Requires the PC-100/PC-100C printer.

A keystroke sequence, found by a TI PPC club member, that puts a TI-58 or TI-59 into an undocumented trace mode once a printer is attached (TI PPC Notes V6N4-5, 1981).

Requires the PC-100/PC-100C printer.

The magnetic-card diagnostic Texas Instruments documented in the owner's manual, both card sides. Prints and displays “−.8888888888” when everything checks out.

Requires the PC-100/PC-100C printer.

The same diagnostic, resized to fit the TI-58's smaller memory partition.

Requires the PC-100/PC-100C printer.

A roughly three-minute test of all data registers that prints “598-TEST-1” and reports the default memory partition; faulty registers are called out by address.

George Thomson's test of all 100 data registers using indirect addressing and the STF fast-mode trick, printing any mismatch on the PC-100A/PC-100C (TI PPC Notes V9N5, 1985).

Requires the PC-100/PC-100C printer.

Keystroke notes on how the TI-58C's constant-memory feature stores the partition setting, and how to reach the extra 32 steps (480–511) that are otherwise keyboard-only (TI PPC Notes V5N7, 1980).

Computes factorials in both normal and Fast Mode so the roughly 70% speed difference is directly comparable — 10! in about 4.6 seconds, 69! in about 31.

The same Fast Mode factorial comparison, for the TI-58/TI-58C.

A mistyped Fast Mode program — one leading zero short of the documented five — that puts a real TI-59 into an unusual, reproducible misbehaving state. Kept as a regression case; it also uncovered a display-refresh bug in the emulator, fixed before v1.0.0.

An unusual keyboard sequence, originally described by TI PPC Notes editor Maurice Swinnen, that puts the TI-59 into a mode where the ROM firmware itself can be listed.

Jared Weinberger's routine for generating and printing every TI-59 key code, using dynamic program-code modification (TI PPC Notes V5N4-5, 1980).

Converts an integer between arbitrary number bases — hex to binary to decimal and back — originally published in Computer Design magazine, 1980.

A filter-design program that transforms a normalized low-pass filter's cutoff frequencies, from the Artech House discrete-time filter design tables.

A deliberately simple program — sums N down to 1 — useful as a stopwatch for comparing execution speed across devices running the emulator.

The smallest useful ASM overlay example: increments a counter on the display in a tight loop, about 1185 times a second.

A precisely timed stopwatch built on the WAIT Dn instruction rather than counting cycles — 222 increments per second, 4.5011 ms each.

Cycles the decimal-point-and-comma nibble across every digit position, demonstrating the emulator's simulated LED afterglow.

A real-hardware timing edge case — a phase-shifted WAIT before SET IDLE exposes all 16 hex segment patterns on real silicon. Documented here for the CPU-emulation detail, but it does not reproduce on Calc-U 59: the emulator's display is a phase-independent snapshot, so the timing quirk this program depends on has nothing to act on.