LISTing Newsletter November 1985

Date: November 1985
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Articles

TitleDescriptionComputers
A Test Drive of the Zebra Floppy Disk Drive SystemsTimex/Sinclair 2068
Big Keyboard 2068A circuit diagram for a “Keyboard Interface Circuit” is printed below. The construction method is your choice. (A PC Board for the cartridge slot is a nice idea) I have not included details on re-wiring a keyboard (see March 85 Listing Pg. 18), but used the connection names used in the March issue.Timex/Sinclair 2068
Centronics Printer Port - AERCO StyleSchematic for a parallel printer interface using the Zilog Z80-A parallel input/output chip (PIO).Timex/Sinclair 2068
Computer Interfacing Techniques in Science
I/O Ports: Centronics PortTimex/Sinclair 2068
Letters to LIST
Library Tape #4
Meeting Notes
Pot PourriThis method of using recursive DEF FN to obtain sums was discussed in a TS Survival column in COMPUTER SHOPPER. It is fast and handy in some applications.Timex/Sinclair 2068, Type-in program
Protection SchemesThe ON ERR… command on the TS 2068 can be used to make your programs essentially “unbreakable”. If the first line of your program, for example, is: and there is a line 9000 of this sort; any time a “break” error occurs the program will “CONTINUE” Slightly nastier, and certainly terminal, is this line, Followed by: The meaning of this should be obvious.Timex/Sinclair 2068
Tasword/MTermTimex/Sinclair 2068, Type-in program
Time-X-change
Try This: London BridgeTimex/Sinclair 2068, Type-in program
ZX81 Schematic