Sample Games

Extended Monitor

8K Super Invaders

Blank Tapes

I wrote several programs for the UK101 as well as typing in, modifying and converting many others. Most of them depend to some extent on the extra hardware that I added to my machine, but a few will work without it.

• Rather pedestrian calendar program CALENDAR. No prizes for finding Millennium Bugs in this one!
• Strange bit of code typed in from Personal Computer World, September 1980: BLOOBERS. The game was written by Richard Warner and was originally designed for the PET. I changed the screen address calculations and the keyboard polling so that it worked on the UK101.
• The UK101 didn't use the 6502 interrupt pins at all; that meant I could use one of them for a real-time clock RTCLOCK. You should be able to find a suitable 100Hz signal in the VDU divider chain.

I also have two machines, my own highly modified one and another that is nearly original. My machine is a fairly early model with mask ROMs, while the other is later and has EPROMs.

Along with the machines, I have several relevant magazines and much technical documentation. I have the official MOS Technology hardware manual for the "MCS6500 Microcomputer Family", Two early third-party manuals are "Programming the 6502" by Rodnay Zaks (Sybex, 1978-1983) and "6502 Assembly Language Programming" by Lance Leventhal (Osborne/McGraw Hill, 1979). Many later books were published specifically for 6502-based machines (usually the BBC Micro); I have "Creative Assembler" by Jonathan Griffiths (Penguin Books, 1984). I also have "Advanced 6502 Interfacing" by John M. Holland (Blacksburg, 1982) and "6502 Assembly Language Subroutines" by Lance Leventhal and Winthrop Saville (Osborne/McGraw Hill, 1982).

And, of course, there are the Practical Electronics magazines:

August 1979	Compukit UK101 Part 1	Dr. A.A.Berk
Sepember 1979	Compukit UK101 Part 2	Dr. A.A.Berk
October 1979	Compukit UK101 Part 3	Dr. A.A.Berk
November 1979	Compukit UK101 Part 4	Dr. A.A.Berk
December 1979	EPROM Programmer Part 1	Dr. A.A.Berk
January 1980	EPROM Programmer Part 2	Dr. A.A.Berk
February 1980	Acoustic Modem Part 1	Kenneth Amor
March 1980	Acoustic Modem Part 2	Kenneth Amor
	Compukit Update	Dr. A.A.Berk
June 1980	Compukit Update	Dr. A.A.Berk
November 1980	Speech Synthesis Part 1	Dr. A.A.Berk
	Resident Editor	Nigel Climpson
December 1980	Speech Synthesis Part 2	Dr. A.A.Berk
January 1981	Interfacing Compukit Part 1
February 1981	Interfacing Compukit Part 2
March 1981	Interfacing Compukit Part 3
April 1981	Interfacing Compukit Part 4
May 1981	Interfacing Compukit Part 5	D.E.Graham
	600 Baud Cassette Interface	P.Martin
June 1981	Interfacing Compukit Part 6
July 1981	Interfacing Compukit Part 7	D.E.Graham