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Compute! and Compute II

Compute!

A magazine devoted mostly to 6502 computers.
Apart from the Compute II period,
before and afterwards also the small SBCs like
KIM-1, AIM 65 and SYM1 got attention of Compute!
High quality scans of Compute first years
with the SBC section, issue 1, 2, 3 and 7 to 19
, alas with a watermark.
Nearly all of Compute! lives here in html format.
The Internet archive has many issues without a watermark

Compute II

Compute II was a short lived split-off of Compute! and also a continuation of the KIM-1/6502 User Notes. Three issues and it was merged back with Compute! again.

HTML version of Issue 1
PDF of Compute II Issue 1
HTML version of Issue 2
PDF of Compute II Issue 2
HTML version of Issue 3
PDF of Compute II Issue 3

Selected articles on KIM-1, AIM 65 and SYM-1 and 6502 in general

Articles by Marvin L. de Jong

Interfacing the AM9511
and various floating point subroutines

Compute! 7, 9, 11, 13, 17
Computer Communications Experiments
Compute! 10
Experimenting With The 6551 ACIA
Compute! 10
Improved Pulse Counting Software For The 6522
Compute! 1
Machine Language Versus Basic Prime Number Generation
Compute! Issue 2
The book by Marvin L. de Jong
Programming and Interfacing the 6502 with Experiments

Articles on 6502, KIM-1, AIM 65, SYM-1

Expanding KIM style 6502 SBC
3 part article in Compute 1981 January to March on the MTU bus
Dungeons And Dragons Dice Simulator For The KIM-1
See also the program running on a KIM-1.
A KIM-1 file in Microsoft Basic
A Terminal for KAOS (KIM AIM, OSI, SYM)
A Vocal HEX Dump for the KIM-1
AIM 65 Floating-Point Arithmetic From Machine Language
Placcating a Rebellious KIM Without Sacrificing RAM
SYM (AIM) Hi Speed Tape Revisited
AIM 65 Tape Copy Utility
AIM User Input And Output
An Efficient AD Interface
Cassette IO with AIM 65 BASiC
BASIC Memory Map KIM AIM SYM PET APPL
Combining BASIC And Machine Language Programs On Tape
Communication
Dissecting C.W. Moser’s ASSMTED 1.0
DLOAD AIM Memory Loader
Hex Conversion
KIM Tidbits Expanding The System
KIM-1 Tidbits BASIC input
Load And Save KIM Basic Programs on Your SYM
Nuts and Volts 6 Centronics via 6522
Nuts And Volts 6502 Read and Write Timing
Read PET Tapes With Your AIM
Real Time Clock Subroutine
SYMple Clock
Test RAM for bad bits Nondestructivily
The Practical Aspects of Assembly Language Programming Part 1 and 2
The Practical Side of Assembly Language
The Single-Board 6502 The KIM-4 Bus
The Single-Board 6502 High Speed Data transfer
The Wonderful Wedge
Track Down Those Memory Bugs
Using The 6522 to drive a Printer
The Carry Bit What it is And How it works

January 2026, the 50th birthday of the KIM-1

n 1975 MOS Technology started delivery of 65XX ICs. So 2025 marks the 50 year anniversary of the 6502!
The earliest mentions of the KIM-1 are from January 1976. The date of the first edition of the User Manual, and first mentions in e.g. Byte.
So I propose to declare January 2026 as the 50th birthday of the KIM-1!
#50yearsKIM1

How to use the time in the 6530/6532

When I acquired a KIM-1 Rev A, obviously sold by NCE/Compumart, it came with some documentation that may interest any programmer working with the MOS Technology (R)RIOT 6530 and 6532.

The timer description the datasheet is a bit vague about how to use. What may help is the document ‘KIM-1 Application Note 2 Interval Timer Operation’ by MOS Technology.

A document with listings of KIM-1 programs called ‘KIM-1 Application Programs CT1’ illustrate the usage of the timer in interrupt mode. You find the documents here:
Compumart KIM-1 Rev A – Retro Computing

PLEASE package The Computerist

PLEASE is a very small package for a standard KIM-1. It has a tiny monitor, command interpreter and many handy subroutines.

PLEASE INSTRUCTIONS
PLEASE LISTING

A small book with five experiments with the KIM-1

A small book with five experiments with the KIM-1.
1. User
2. Input/output
3. I/O controller
4. Timing
5. Hardware interrupts

KIM-1 experiments)

MOS Technology KIM-1 Preliminary datasheet 1976

With one of my KIM-1s (a Rev G) came a MOS Technology KIM-1 Preliminary datasheet 1976.

Added to the KIM-1 manuals page.


Compumart KIM-1 documents

When I acquired a KIM-1 Rev A it came with some documentation revealing its provenance:

Warranty card
Brochure showing the Rev A
A document with KIM-1 program called KIM-1 Application CT1
KIM-1 Application Note 2 Interval Timer Operation

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Compumart KIM-1 Rev A

When I acquired a KIM-1 Rev A it came with some documentation revealing its provenance:

  • Warranty card
  • Brochure showing the Rev A
  • A document with KIM-1 program called KIM-1 Application CT1
  • KIM-1 Application Note 2 Interval Timer Operation

KIM-1 Application Programs CT1
KIM-1 Application Note 2 Interval Timer Operation

My Rev A CPU week 15 1976

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KIM-100

The KIM-100 is a homemade KIM-1 to S-100 bus system. Well designed, well documented and with a professional look.

Photos and videos by Andys-arcade, thanks!


KIM-100

EPSON MFP image

EPSON MFP image

EPSON MFP image

EPSON MFP image

EPSON MFP image