William J. Pedersen – Timex/Sinclair Computers

Bill Pedersen was very active in the Timex/Sinclair community, developing hardware and software solutions for all kinds of challenges.

According to one user group member Bill visited:

He is indeed a character…a fascinating one. I tend to believe all of his claims with regard to the 2068. His setup for bankswitching involved two CORE memories each measuring 18″x10″ and requiring +/- 5v and +/- 15v in the amperes range. Also a “back plane” to hold a mess of other boards. No wonder he couldn’t demonstrate it in the outside world. Incidentally, his primary affliction is Lupus with arthritis and emphysema as secondary manifestations. How he manages to get around is a wonder. Any exertion at all has him wheezing and gasping. He is most entertaining when he is sitting down but rather disconcerting when he has to move.

Articles (74)

Title	Author(s)	Publication	Date
2068 Bank Switching, Part IV		LISTing Newsletter	July - September 1986
2068 Home ROM Corrections – Part I Corrections to the ROM, in part to support bank-switched memory.	William J. Pedersen	Update Magazine	April 1991
2068 Home ROM Corrections – Part II Corrections to the ROM, in part to support bank-switched memory.		Update Magazine	July 1991
2068 ROM Bypass Board Schematic, Revised Enclosed are copies of “ctas.Bl” v9.2. If you have sent copies of the previous version to anyone and happen to...	Larry Crawford	Update Magazine	January 1995
Bank Switching The Timex/Sinclair 2068 Computer		LISTing Newsletter	February 1986
Bank Switching the TS2068 (III)		LISTing Newsletter	May 1986
Bank Switching… The Timex/Sinclair 2068 Computer, Part I What is bank switching? The TS 2068 contains a thin black rectangular chip that is the “boss” — the Central...	William J. Pedersen	T-S Horizons	May/June 1986
Bank Switching… The Timex/Sinclair 2068 Computer, Part II Welcome back! The first installment might have given you the idea that machine code was necessary for understanding bank switching....	William J. Pedersen	T-S Horizons	July-August 1986
Bank Switching… The Timex/Sinclair 2068 Computer, Part III and IV Part III Before discussing the roll of the SCLD in bank switching, it is desirable to summarize the known functions....	William J. Pedersen	T-S Horizons	December 1986
Bill Pedersen’s Diskspeed Program Adjustments to the disk speed program to make it work with Larken drives.		Update Magazine	April 1994
CAD#5 Intfc Listing for Oliger/Epson Follow up to earlier article about PCB design program.		Update Magazine	October 1992
CAD#5 Listing for Oliger/Epson Follow up to PCB design programs in prior issues.		Update Magazine	October 1992
Cassette Tape Load/Save Monitor		ZXir QLive Alive!	Winter 1993
Catch 2068		ISTUG Newsletter	July - August 1992
Desktop Publishing?		Update Magazine	October 1991
Disk Tools		The RAMTOP	Spring 1993
Dot Matrix Printer Driver Discussion of printer drivers and the challenges of printing graphics to 9 and 24 pin printers.		Update Magazine	April 1990
Editoral and Dedication William J. Pedersen passed away from complications of lupus.		Update Magazine	January 1993
Editorial Passing of William J. Pedersen, founder of WIDJUP Co.		Sinc-Link	January/February 1993
IEEE-488 For Sinclair Users		ISTUG Newsletter	July - August 1991
IEEE-488 for Sinclair Users It is not widely known that the COMMODORE serial port is a simple form of the IBEE-488 GPIB with serial...		Update Magazine	January 1990
Improved TS-2068 Internal ROM Bypass I A major barrier to fixing the problems in INTERNAL ROM is one of access Even though the ROM is socketed,...	William J. Pedersen	ZXir QLive Alive!	Summer 1999
Improved TS2068 Internal ROM Bypass Detailed hardware design for replacing the TS2068’s HOME ROM and EXROM without opening the computer case, using the cartridge slot...	William J. Pedersen	Timelinez	July-December 1989
Improved TS2068 Internal ROM Bypass		LISTing Newsletter	March 1989
Leave My Stuff Alone Theft hurts just as much when the stolen item Is useless to the thief as If it were jewels. What...		T-S Horizons	April/May 1984
Leave My Stuff Alone!		LISTing Newsletter	March 1986
Letter from Don Lambert		LISTing Newsletter	February 1993
Letter from William Pedersen		LISTing Newsletter	December 1988
Letter from William Pedersen		ISTUG Newsletter	May - June 1992
Letter re Bank Switching		ISTUG Newsletter	February 1989
Letter to Jeff Taylor		Sinc-Link	November/Decemember 1992
Letters		LISTing Newsletter	February 1986
Letters		LISTing Newsletter	December 1985
Listing On Your Printer		The Plotter	March 1988
Listing on Your Printer: A Complete LLIST Program for the TS-2068 Discusses deficiencies in commercial LLIST programs, particularly their mishandling of tokens and color commands that are incompatible with non-Timex printers....	William J. Pedersen	Timelinez	February 1987
LKDOS vs JLO SAFE Comparison of the two disk operating systems.		Update Magazine	April 1992
LLIST to Your Printer		LISTing Newsletter	November 1986
Memory Improves With Age Reprint of the same article as it appeared in Update Magazine.	William J. Pedersen	ZXir QLive Alive!	Summer 2000
Memory Improves With Age? Crazy? Perhaps so, but survival of our favorite antique TS2068 computer depends on it to a degree. Two advances are...	William J. Pedersen	ISTUG Newsletter	March - April 1989
More Bank Switching? Egad Sir!		LISTing Newsletter	May - June 1987
New and Upcoming in 1987 Details about upcoming 2nd Annual Mid-West Timex Sinclair Computerfest; Larken developing RAMdisk for 2068; Thomas B. Woods will be offering...		Time Designs Magazine	January/February 1987
New Releases New software from Ron Ruegg; “Touring the TS2068 ROM Operating System” book from William J. Pedersen; Arnold Ramaker is developing...		Time Designs Magazine	July/August 1988
Note Pad A TS2068 BASIC program for composing and printing short personalized notes or letters on the Timex 2040 printer. Addresses are...	William J. Pedersen	Timelinez	December 1988
Printed Circuit Board Development Program CAD program and manual for the TS 2068.		Update Magazine	April 1992
Printed Circuit Board Development Program CAD#2 for Olivetti PR2300 Printer Follow up to the PCB development program in the April 1992 issue.		Update Magazine	July 1992
RLE Made Easy		ISTUG Newsletter	July - August 1992
ROM Bypass Board PCB layouts		Update Magazine	July 1994
ROM Bypass Circuit Description Board to bypass 0-16K of the HOME bank and 0-8K of the EXROM bank.		Update Magazine	October 1992
ROM/EXROM Bypass Board for External Eproms You have Bill Pedersen’s schematics, etc. He, of course, could not physically try them out so I tried out his...	Larry Crawford	Update Magazine	July 1993
Sinclair Talks to PC/XT Routines to transfer files to/from a PC using a parallel printer interface.		Update Magazine	January 1990
The Centronics Interface		LISTing Newsletter	May 1986
The Changing Complexion of Timex-Sinclair Computing Seen at the Orlando 1988 Winter Fest This issue of Up-Date was delayed a week to report upon the Orlando 1988 Winter Fest. Representing the Western USA...		Update Magazine	April 1988
The Incredible Shrinking Screen A Spectrum/TS2068 BASIC program that progressively reduces the active screen display through a series of PLOT/DRAW and PRINT operations, creating...	William J. Pedersen	Timelinez	November 1988
The TIMEXsinclair 2068: Bank Switching and Memory Expansion A landmark technical article proposing interim standards for expanding the TS2068 beyond its standard memory limits. Introduces a Bank Switching...	William J. Pedersen	Timelinez	May/June 1989
The Widjup Buss		LISTing Newsletter	March 1989
The WIDJUP Co. Part III		Timelinez	March 1990
The WIDJUP CO. Revisited		Timelinez	February 1990
The ZX Printer and the 2068		LISTing Newsletter	February 1986
Throwing the Baby Out With the Washwater?		LISTing Newsletter	October 1987
Totally Safe Machine Code for the ZX81 and TS1000 Tips for writing safe machine code.		T-S Horizons	December 1986
Try These Overprinting A demonstration of the TS2068’s OVER and INVERSE print attributes. A base string A$ is drawn at a fixed...	William J. Pedersen	LISTing Newsletter	December 1985
TS 2068 Bank Switching, Part 2		LISTing Newsletter	April 1986
TS 2068 HOME ROM Bypass		ISTUG Newsletter	November 1988
TS-2068 Cottage Software Support Fairware (Jack Dohany), Chia-Chi Chao, RMG Enterprises, S&K Enterprises, Lemke Software, Byte Power, Grey & Clifford, Bill Pedersen.		Update Magazine	April 1988
TS-2068 Home ROM Bypass A major barrier to fixing the problems in the HOME ROM is one of access. Even though the ROM is...	William J. Pedersen	Nite-Times News	December 1988
TS-2068 Memory Expansion MEMORY IMPROVES WITH AGE? Crazy? Perhaps so, but survival of our favorite antique TS-2068 computer depends on it to a...	William J. Pedersen	Nite-Times News	March - April 1989
TS-2068 ROM ByPass Board Features and Options II		ZXir QLive Alive!	Autumn 1999
TS2068 Back-Plane Expansion System Standard		Timelinez	February 1990
TS2068 Home RAM Map		ISTUG Newsletter	September - October 1993
TS2068 HOME ROM Bypass		LISTing Newsletter	January 1989
TS2068 ROM Bypass Schematic Schematic and notes about a proposed expansion system.		Update Magazine	April 1994
TS2068 Video Bells and Whistles The Faint-of-Heart Zone Stay away from advanced video modes at any cost! Who needs them? Besides, what we can already...	William J. Pedersen	Update Magazine	October 1992
Utility for Oliger Disk Drives		LISTing Newsletter	February 1993
When They Built the Timex 2068 Computer They Threw Away the Mold! Schematic diagram of the Z80, SCLD and memory along with call to correct the problems with the computer.		Update Magazine	October 1991