A TIM (6530-004) Superjolt simulator update, also KIM-1 Simulator

A TIM (6530-004) Superjolt Demon simulator.

Version 0.4. TIM Superjolt Simulator V0.4, Tiny Basic working!

Since the TIM Simulator and the KIM-1 Simulator share a lot of code, also the KIM-1 Simulator got an update, to let Tiny Basic work better: V1.3.8 is available.

The bundled Conversion 8 bit hex formats is now at version 2.6.

I have since yesterday a Raspberry Pi 5. Great little machine. Very grown up installation. Lazarus works fine with the usual trick of first the apt install version and then fpcupdeluxe for a newer version.

The TIM and KIM-1 Simulator work fine on the Pi 5, so a Raspberry Pi 5 is now included in the distributions.

Superjolt and TIM 6530

I have acquired 3! Superjolts. With a Synertek Superjolt CP110 manual and Tiny Basic + RAP (assembler) in ROM.

A good opportunity to update the 6530 and the Jolt SuperJolt pages. Better quality and more documents, more photos, ROMs dumped.

THE-RC 41523 CPU-4

CPU-4 is a 6502 SBC based upon the TIM 6530-004. Developed for teaching on the Technical University Eindhoven.
The only surviving part of the system is a 40 page Dutch manual.
Described are the function of TIM, Tiny Basic and Resident Assembler Program, same as the Jolt and Superjolt.

Dutch manual of RC41523 CPU-4

Some excerpts from the manual:

Known 6530 variants

6530-002 $1C00-$1FFF KIM-1 listing in KIM-1 Users manual
6530-003 $1800-$1BFF KIM-1 listing in KIM-1 Users manual
6530-004 $7000-$73FF TIM Terminal Monitor, see the TIM page
6530-005 According to this OSI appnote this is an unprogrammed version of the 6530 TIM
I have only seen ads for this part without further description of what this is.
It has the 16 I/O lines, 64 word RAM and the timer, which can generate an IRQ. One can assume the ROM is empty.

6530-006 Allied Leisure pinball version 1 (IC6)
6530-007 Allied Leisure pinball version 1 (IC3)
6530-008 Allied Leisure pinball version 1 (IC5)
6530-009 Allied Leisure pinball (IC5)
6530-010 Allied Leisure pinball (IC6)
6530-011 Allied Leisure / Fascination pinball (IC3)

6530-012 Gottlieb System 1 sound board (R3014-12)
6530-013 Gottlieb System 1 sound board (R3014-13)
6530-014 Gottlieb System 80 series sound board (R3016-11)
6530-016 Used in Gottlieb system 80/80A/80B sound boards

6530-024 Commodore Chessmate (based upon Peter Jennings MicroChess)

6530-241 MIOT in pinball machines
6530-243 MIOT in pinball machines

Commodore diskdrives ROM at $FC00-$FFFF

901466-01 6530-??? 2040 DOS 1.0 Shugart SA390 2040, 3040 and 4040
901466-02 6530-028 4040 DOS 1.2 Shugart SA390 2040, 3040 and 4040
901466-04 6530-034 8050 DOS 2.0 DOS 2.1 Shugart SA390
901483-02 6530-036 8050 DOS 2.5
901483-03 6530-038 8050 DOS 2.5 Micropolis 1006-II (8050)
901483-04 6530-039 8050 DOS 2.5 Tandon TM100-3M (8050)
901884-01 6530-040 8X50 DOS 2.7 Tandon TM100-3M (8050) Tandon TM100-4M (8250)
901885-01 6530-044 8X50 DOS 2.7 Micropolis ???
901885-04 6530-047 8X50 DOS 2.7 Micropolis 1006-II (8050) Micropolis 1006-IV (8250) Micropolis 1106-II (Safari, mit Garagentor, 8050) Micropolis 1106-IV (Safari, mit Garagentor, 8250)
901869-01 6530-048 DOS 2.7 M.P.I. 101SM (8050)M.P.I. 102?? (8250)
251256-02 6530-050 8250 DOS 2.7 Matsushita JU-570-2 (8250LP)
251257-02A 2716 DOS 2.7 Matsushita JU-570 (SFD-1001) Matsushita JU-570-2 (SFD-1001)
251474-01B 2716 DOS 2.7 Matsushita JU-570-2 (8250LP)

The RRIOT in CBM disk drives are only different in the ROM contents The rest is as follows:

– Pin 18 is PB6 (no CS1).
– Pin 19 is CS2 (noPB5) .
– Pin 17 (PB7/IRQ) has no Pullup.
– ROM is in $FC00 bis $FFFF (RS0=0, CS1=X, CS2=1).
– RAM is in $0000 bis $003F (RS0=1, CS1=X, CS2=0, A9=,0 A8=0, A7=0, A6=0).
– I/O is on $0080 bis $00BF (RS0=1, CS1=X, CS2=0, A9=,0 A8=0, A7=1, A6=0).

Logic of addressing:

 	RS0	CS1	CS2	A9	A8	A7	A6
ROM	0	X	1	-	-	-	-
RAM	1	X	0	0	0	0	0
IO	1	X	0	0	0	1	0

Via an adapter board Commodore reused older 6530’s with new firmware by disabling the built in ROM and adding a 2716.
See Zimmers Commodore archive. Note that not just any 6530 can be used in this way, only the 6530’s from the Commodore diskdrives. A more general approach with a 6532 is described below.

A similar hack is replacing a non-functional KIM 6530 with a 6532, a 2716 and some glue logic: Gilbert Coville) http://gc.org/rc2011sc/ and http://gc.org/rc2012ww/

Most if the information on this pages is also found on the pages of Martin Hoffman Vetter

RIOT 653X datasheets

Datasheets 6530

The 6530 was produced by most 6502 manufactures, from MOS Technology/Commodore SG to Rockwell and Synertek. All production datasheets that I have seen are identical, The oldest one is a preliminary MOS datasheet for the MCS6530, missing the ordering pages of the production version.

MOS Technology MCS6530 Memory IO Timer Array
Preliminary Data Sheet 1975
MOS Technology MCS6530 Memory IO Timer Array
Preliminary Data Sheet 1975-08
MOS Technology MCS6530 Memory IO Timer Array
Preliminary Data Sheet 1975
Commodore 6530 6520 datasheet
Commodore 6530 datasheet
MOS 6530 datasheet
> Commodore MOS 6530 datasheet
Rockwell r6530 RRIOT
Synertek sy6530


MOS 6532 RIOT Preliminary feb 1977
Commodore MOS 6532 RIOT
Commodore MOS 6532 RIOT
Rockwell R6532
6532 timer interrupt precautions
6532 timer interrupt precautions
Rockwell R6532 RAM IO Internal Timer Device (RIOT)
synertek sy6532

CMOS 6532

The 6532 exists in CMOS, I have only seen the California Micro Devices GSE 65SC32 variant.

Synertek 65C32 preliminary

Other RIOTs
In Rockwell databooks there are more RIOTs described. 6531, 6534. Never seen in the wild, a mention here and there of being used in pinball machines.
The timer/counter is a lot more capable, 16 bits etc.

R6531 ROM-RAM-I/O-Counter (RRIOC)
R6531 ROM-RAM-I/O-Counter (RRIOC)
R6531 ROM-RAM-I/O-Counter (RRIOC)
Rockwell R6534 ROM-IO-Counter (RIOC)

Me and my KIM-1

My first computer is a KIM-1. Still have it! A life changing experience!

This is the story of me and the KIM-1.

Philips educational kits.

As a young child, at age 12, I was introduced to electronics with the Philips electronic kits. First a Pionier crystal radio. Easy to build, good instruction manual. Lots of listening pleasure!.

Two years later I bought the Philips EE8 Electronic Engineer kit. Again nice builds (the 8 stands for 8 experiments), with a good manual. Since the manual covered the expansion to the EE20 for 20 experiments, I bought the parts myself one by one at Aurora Vijzelgracht, Amsterdam.
More on the Philips kits on my website dedicated to electronic kits.

Radio Bulletin

In 1978 I bought my first computer, a KIM-1. It turned out to be a Rockwell rebadged Rev F Mos Technology board.

The beginning of lots of fun, learning, member of the KIM gg Club and making and publishing in the dutch electronics magazine Radio Bulletin and the KIM Kenner.

In 2014 the big KIM-1 machine was finally taken down in parts, the following photos showed the end result as in 1985 after many years of tinkering.

The KIM-1 system ended as a real production system until 1985, mainly to write articles, all Radio Bulletin and KIM Club Magazine related work was done with this system.

My KIM-1 workplace in 1979, no video terminal, no printer, hand assembly

My workplace setup in 1982: KIM-1, dual cassette, tv monitor, H14 printer, ASCII keyboard

1984, VT100 as videoterminal, what a progress!

Then a CP/M machine took over (a Spectravideo X’Press 738) with the same VT100 as terminal.

  • KIM-1
  • 8K RAM  in system case
  • 32K RAM in expansion case
  • Two ACIA 6850 serial
  • A PIA/VIA card with two 6820 PIA’s
  • Parallel ASCII keyboard with home made logic circuit
  • Video Display 32×32 uppercase characters on an analog TV
  • Dual cassette tape system with motor control
  • MDCR digtal cassette system in second expansion case
  • Radio Grafisch Display in second expansion case
  • Heathkit H14 matrix pinter, serial with RTS handshake via bitbanging RIOT port
  • VT100 Digital Equipment Video display unit VT100
  • Boot tape to load device drivers and Micro Ade (extended to 8K)
  • MICRO ADE assembler/editor, used for program development and article authoring
  • Microsoft Basic KB9 (not used often, nice study material!)
  • Pascal-M compiler and interpreter (mainly development and experiments, not for production)

First the KIM-1, I still have it, in working condition, in my private museum. Changes still visible, are a red acryl cover over the LED displays, a capacitor moved to the back to make it flat enough to fit the case I made and some supports to have it lay stable and safe on a table.

Why a KIM-1?

In 1977 I was reading in the electronics magazines about the revolution taking place: 8 bit microprocessors!
During my study I encountered Digital Equipment machines, PDP-8 in the lab, PDP-11 in the Mathematic Computer Science department, a Minc in Medical Physics group, my major.
The electronics department where I was doing an intern not only introduced to digital electronics and I helped them to introduce the Z80 to the instruments designed for laboratory experiments.
I learned assembler quickly, PDP-11 was a dream come true, the Z80 a bit of a nightmare but you could do so much with effort.

At the same time I started to write for the magazine Radio Bulletin, simple analog and digital circuits and continued to be an editor until 1987. I met Dick de Boer who was writing his famous Microprocessor articles and introduced the KIM-1 to the Dutch electronic engineers. So a KIM-1 with the very attractive 6502 was the logical choice for my first microprocessor system.

First case: memory, connectors, power supply

A KIM-1 itself was fun to learn with, but it quickly needed more; a permanent power supply, protection, easy to access connectors and interfaces for  a bus to have  more memory.
So the case seen in the next figure was built:

Power hungry, so lots of lineair power supplies with large cooling.

The first case I built from alu profiles contained the KIM-1, a backplane for 6 memory boards, a lot of power supplies (lineair, so heat was a problem!), a patch panel to access the expansion connector, cassette I/O, serial interface and various switches.

PCBs handmade, double sided!

Memory 2K RAM Card, BEM Bus Brutech Variant made by Hans Otten
Memory boards were made myself by drawing with Edding ink on the blank PCB, etching and drilling. Filled with 2102 RAM IC’s for 1K per board, it filled lower RAM of the KIM-1 $0400 – $13FF. The bus is a 31 pin DIN connector, based upon the BEM (Brutech) bus.

I bought two of this deck from Radio Service Twenthe, Den Haag, fascinating electroncis dump store!

The next thing I built was a video display unit. All TTL 74XX logic IC’s, a 2513 character generator, a AY-5-1013 character generator, an ASCII keyboard, display on TV 32×32 characters uppercase. RS232 input/output to the KIM-1.
On top of the VDU a dual cassette deck is shown. From the famous Dutch dump shop Radio Service Twente two audio cassette decks were bought, some audio amplifiers and power supply added, and a remote control circuit via a 6532 GPIO line (standard as in Micro Ade). Served me well for many years, in 2014 the decks strings were dried out and crumbled after many years of not being used.

Next was a real expansion cabinet with a long backplane for 32K memory with 8x 4K RAM card, 2114 based, Designed by me, published in Radio Bulletin and sold by Visser Assembling Electronics. BEM bus compatible.

4K SRAM card

4K SRAM card, Radio Bulletin September 1979 part 1  part 2

Production 4K RAM card

Prototype 4K RAM card, also hand drawn on the PCB!

In the expansion cabinet three slots were added for I/O. Two cards were designed by me and published in Radio Bulletin: an ACIA card for two 6850 Motorola ICs, and a PIA card for two PIAs, 6522 or 6520 or 6820 or 6821. I never used more than one ACIA and one PIA card. Shown are the prototype cards, in the article production quality PCBs were used.

PIA and VIA card design by Hans Otten June 1984 Radio Bulletin

ACIA Motorola 6850 by Hans Otten, 1983 Radio Bulletin

On one of the ACIAs a VT100 Digital Equipment terminal was connected, taking over from the bit banged serial interface and the homebuilt video display. ON the other ACIA a Heathkit H14 matrix printer was added, a mediocre but adequate printer.

Together with Micro Ade as assembler and editor, the dual cassette deck, 40K RAM In total, this was a nice machine! Until 1987, when I bought the Spectravideo X’Press 738 MSX and CP/M system, used for all my publishing activities.

A third expansion cabinet was built around 1983. It was driven by the PIA’s, the Radio Bulletin Grafisch Display was inside the cabinet, along with two MDCR Philips Digital cassette recorders, alo published in Radio Bulletin. The speed difference between Hypertape audio cassettes and 2400 baud MDCR speed was not that impressive.

Dirk Dral

EPROM card (Dirk Dral)


Christian Ortner (mister-freeze at the VzEkC e. V. forum build a SBC with expansion around a TIM IC.
Here is his projects description of the TIM-1 SBC. TIM-1 OverviewSchematic, images, hex listing of Lunar Lander!



Christian Ortner (mister-freeze at the VzEkC e. V. forum build a SBC with expansion around a TIM IC.
Here is his projects description of the TIM-1 SBC.

Since the TIM chip is actually not available, the TIM-1 is unfortunately only useful for people who are in possession of a 6530-004. But, there is still the TIM-2 😉 The idea for the project came up when I got a few MPS 6530-004 by chance. Actually I always wanted to have an affordable KIM-1, but so far I haven’t found one. I also wanted to learn how to use KiCad.

The RRIOT 6530-004 (TIM chip) was sold by MOS only as a kit in the form of the TIM chip, a manual and a schematic. This meant that the computer enthusiast or developer had to assemble the rest of the system themselves. Commercially, the TIM chip was probably only used in the Jolt and Super Jolt. It was not until the KIM-1 that MOS released a complete development and learning system.


With the TIM-1 project a SBC should be created, as authentic and as exact as possible after the original circuit diagram for the TIM chip of MOS. So for the TIM-1 -at least for the mainboard- only those parts should be used which were included in the MOS schematic and by the way only those parts which were available in the mid seventies. The design is based on the KIM-1 and other SBCs from that time. The layout is adapted to the original schematic, i.e. the parts can be found at the same place where they are placed in the schematic. This makes it easy to understand the system from the schematic. The TIM-1 needs 5 V supply voltage. If you use the EIA (RS232) interface, you have to supply -12V and +12V additionally. For the current loop (Teletype) there is an additional -10V supply required, but it can be assumed that -12V is also possible (maybe a Resistor must be changed). The transistor -according to the original schematic- PN2709A is probably a typing error. The PN 2907A will surely be the correct one. For simplified use with a modern terminal emulator the serial interface is led out laterally as TTl level. This allows the system to operate using only 5V and a USB to TTL adapter. The address decoding for the selection of RAM and RRIOT is incomplete, therefore there is a multiple selection over the whole address range. Therefore, when using the expansion card, an external disabling line for the internal RAM and the TIM chip is necessary to avoid address overlaps. Surely this could have been improved right away, but the TIM-1 should be expandable but, as far as possible, conform to the plan of MOS. The 4 SRAMs 2111 (256×4) on the board provide the user with 512 bytes (page 0 and 1). For small programs and for getting to know the TIM-1 this is very sufficient, but for more extensive programs this is of course too little. Therefore, the TIM-1 has received a simple memory expansion. This external card can be equipped with 8 pieces of RAM or EPROM (probably also modern EEPROM) with standard 2k x 8 (e.g. 2016 RAM and 2716 Eprom). A 4kx8 EPROM 2732 can be used as well, here the upper or lower 2 kB must be selected by jumper.

The operation of the TIM-1 is almost completely covered with the TIM manual from MOS.
Since the TIM chip is actually not available, the TIM-1 is unfortunately only useful for people who are in possession of a 6530-004. But, there is still the TIM-2 😉 The idea for the project came up when I got a few MPS 6530-004 by chance. Actually I always wanted to have an affordable KIM-1, but so far I haven’t found one. I also wanted to learn how to use KiCad.

TIM-1 Overview

TIM-1 Setup with Terminal and Papertape

TIM-1 running Lunarlander

TIM 1 Memory and Slot Card

TIM-1 with Expansion

TIM-1 Schematic
TIM-1 Memory MAP
TIM-1 Memory Expansion Card

TIM-1 running Lunarlander

LUNARLANDER for 6502 and TIM

LUNAR LANDER for the 6502

HEX File from Mark Garetz´s Listing in Dr. Dobb´s Journal (August 1976).
Just typed in with a little debugging by Christian Ortner in 2023

KIM-1 and TIM updates

I have added the following to the KIM-2 KIM-3-KIM-4 KIM-5 KIM-6 pages:

– brochure with photos and descriptions and pricelist KIM System Products
– photos of KIM-2 and KIM4 with KIM-4 motherboard with KIM-3b, KIM-5, KIM-6
– brochure TIM System Development Aid with pricelist

The brochure of KIM-5 etc is from Commodore, the KIM-2 RAM was already dropped for a higher capacity KIM-3B. The KIM-5 was still mentioned as product. Alas I have never seen or heard of a KIM-5 in the hands of a user. So the ROMS are lost alas.

KIM-4 with KIM-3B, KIM-5, KIM-6

Who were involved in the development of KIM-1 and TIM?

The 6530-002 (the KIM monitor), 6530-003 (the KIM tape routines) and 6530-004 (TIM, the teletype monitor) are in the ROM of these IC’s. Developed in/for/by MOS Technology.

For TIM the Story of TIM (DEMON as Ray Holt called it) tells about Manny Lomas.

It would be nice to know more who did hardware and software design for the KIM-1 (must have been a small team since they are so intertwined) of these innovative early 6502 development.

The story should start with Chuck Peddle and his team. They developed the 6502 and supporting IC’s like 6530 (RRIOT) and 6532 (RIOT).

The story of KIM talks about Don McLaughlin, MOS Technology founder and engineering manager of the project. Peddle and a programming manager named Bob Winterhalt agreed with the idea and the three men began the design. According to MOS Technology employee Al Charpentier, John May did the actual design.