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Byte Magazine 6502 and KIM-1

Articles and advertisements from Byte Magazine related to the 6502 in general and the KIM-1.


Byte Magazine 1975 11 Son of Motorola (or, the $20 CPU Chip)

Byte Magazine 1975 11 Son of Motorola (or, the $20 CPU Chip)

Byte Magazine 1975 12 Introducing Jolt .. the world lowest cost computer system


Byte Magazine 1976 01 Introducing Jolt .. the world lowest cost computer system


Byte Magazine 1976 04 What’s New, KIM-o-sabee


Byte Magazine 1976 05 A Date with KIM

Byte Magazine 1976 05 A Date with KIM

Byte Magazine 1976 08 How I relate to KIM True Confesssions

Byte Magazine 1976 08 How I relate to KIM True Confesssions

Byte Magazine 1977 03 A opcode Table for 6502

A opcode Table for 6502

Byte Magazine 1977 04 A Review of Tom Pitman’s Tiny basic

Byte Magazine 1977 04 A Review of Tom Pitman’s Tiny basic

Byte Magazine 1977 04 KIM goes to the Moon

Byte Magazine 1977 04 KIM goes to the Moon, Jim Butterfield

Byte Magazine 1977 06 Interfacing the IBM Selectric Keyboard Printer

Byte Magazine 1977 06 Interfacing the IBM Selectric Keyboard Printer

Byte Magazine 1977 06 Come Fly with KIM

Byte Magazine 1977 06 Come Fly with KIM

Byte Magazine 1977 07 Giving KIM Some Fancy Jewels


Byte Magazine 1977 09 A Sampling of Techniques for Computer Performance of Music

Byte Magazine 1977 09
A Sampling of Techniques for Computer Performance of Music
Hal Chamberlin

Byte Magazine 1977 09 A new Dress for the KIM


Byte Magazine 1977 10 Use S-100 Boards with your KIM-1 advertisement

Use S-100 Boards with your KIM-1 advertisement

Byte Magazine 1977 10 Chess program for SOL and KIM-1

Chess program for SOL and KIM-1

Byte Magazine 1977 11 Advertisement KIM Meets S-100

Byte Magazine 1977 11 Advertisement KIM Meets S-100

Byte Magazine 1977 11 Sweet 16 Steve Wozniak

Byte Magazine 1977 11 Sweet 16 Steve Wozniak

Byte Magazine 1977 11 A 6502 Personal System Design: Kompuutar

Byte Magazine 1977 11 A 6502 Personal System Design: Kompuutar

Byte Magazine 1977 12 The XF and X7 Instructions of the MOS Technology 6502

Byte Magazine 1977 12 The XF and X7 Instructions
of the MOS Technology 6502

Byte Magazine 1978 02 Sweets for KIM A Low calorie Text Editor

Byte Magazine 1978 02
Sweets for KIM A Low calorie Text Editor

Byte Magazine 1978 03 Microchess 1.5 versus Dark Horse


Byte Magazine 1978 03 KIMSI

Byte Magazine 1978 03 KIMSI

Byte 1978 06 More Music for the 6502


Byte 1978 06 Audio Processing with a Microprocessor

Byte 1978 06
Audio Processing with a Microprocessor

Byte 1978 07 KIMER: A KIM-1 Timer


Byte Magazine 1978 09 Plugging the KIM-2 Gap

Byte Magazine 1978 09 Plugging the KIM-2 Gap

Byte Magazine 1978 11 KIM-1 advertisement

Byte Magazine 1978 11 KIM-1 advertisement
Commodore MOS Technology

Byte Magazine 1978 12 SUPERKIM advertisement

Byte Magazine 1978 12 SUPERKIM advertisement

Byte Magazine 1978 12 A Single Board Microcomputer System SYM-1

Byte Magazine 1978 12
A Single Board Microcomputer System SYM-1

Byte Magazine 1978 12 Zapper A Computer Driven EPROM Programmer

Byte Magazine 1978 12
Zapper A Computer Driven EPROM Programmer

Byte Magazine 1979 01 RNB Enterprises SYM-1 KIM-1 VAK-X boards advertisement

Byte Magazine 1979 01
RNB Enterprises SYM-1 KIM-1
VAK-1to VAK-8 boards advertisement

Byte Magazine 1979 01 Jade Computer Products

Byte Magazine 1979 01 Jade Computer Products
SYM-1 KIM-1 6502 6530-002 – 003 -004 -005 IC’s

Byte Magazine 1979 02 1980 02 Another Plotter to Toy with, Revisited

Byte Magazine 1979 02 1980 02
Another Plotter to Toy with
Another Plotter to Toy with, Revisited

Byte Magazine 1979 02 Cosmac 1802 Simulator for KIM-1

Byte Magazine 1979 02 Cosmac 1802 Simulator for KIM-1

Byte Magazine 1979 03 MICROCHESS advertisement

Byte Magazine 1979 03 MICROCHESS advertisement

Byte Magazine 1979 05 Aids for Hand Assembling Programs

Byte Magazine 1979 05
Aids for Hand Assembling Programs

Byte Magazine 1979 06 Software for Jolt and TIM owners

Byte Magazine 1979 06
Software for Jolt and TIM owners

Byte Magazine 1979 06 KIM-1 Control System

Byte Magazine 1979 06 KIM-1 Control System

Byte Magazine 1979 07 8080 Simulator for the 6502

Byte Magazine 1979 07 8080 Simulator for the 6502

Byte Magazine 1979 08 Turn Your KIM into a Metronome


Byte Magazine 1979 09 Interface a Chessboard to Your KIM-1

Byte Magazine 1979 09 Interface a Chessboard to Your KIM-1

Byte Magazine 1980 03 KIM-1 Multiplication and Division

Byte Magazine 1980 03 KIM-1 Multiplication and Division

Byte Magazine 1980 03 You Win! with Sybex

Byte Magazine 1980 03 You Win! with Sybex

Byte Magazine 1980 04 Advanced Real-Time Synthesis Techniques

Byte Magazine 1980 04
Advanced Real-Time Synthesis Techniques
Hal Chamberlin

Byte Magazine 1980 04 Program Those 2708s!

Byte Magazine 1980 04 Program Those 2708s!

Byte Magazine 1980 06 An Answer/Originate Modem

Byte Magazine 1980 06 An Answer/Originate Modem

Byte Magazine 1980 09 Penny Pincher’s Joystick Interface

Byte Magazine 1980 09 Penny Pincher’s Joystick Interface

Byte Magazine 1980 06 The Impossible Dream

Byte Magazine 1980 06
The Impossible Dream
Computing e to 116,000 places with a Peroanl Computer
Stephen Wozniak

Byte Magazine 1980 10 The 6502 gets Micro programmable Instructions

Byte Magazine 1980 10 The 6502 gets Micro programmable Instructions

Byte Magazine 1980 10 Floptran IV: A Tiny Compiler

Byte Magazine 1980 10 Floptran IV: A Tiny Compiler

Byte Magazine 1981 10 A Simple Implementation of Multitasking

Byte Magazine 1981 A Simple Implementation of Multitasking

Byte Magazine 1980 12 Monster Combat

Byte Magazine 1980 12 Monster Combat

Convert hex formats new version

Bug fix release of the PC utility to convert MOS papertape, Intel hex, Motorola S record, Apple 1 hex etc. Windows and Linux. Source included.

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PC utilities updated

The PC utilities page has seen an update of th4 Conversion hex formats utility.

Programs to manipulate the binary and hex formatted files of interest for SBC owners. Intel hex, MOS papertape, Motorola S-record, binary, hex conversion fort eh 8 bit world.
Runs on Windows, Linux, Mac due to Lazarus and Freepascal. Source included.

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Jolt, Super Jolt, Microcomputer Associates

Thanks to Ray Holt (Microcomputer Associates, Synertek Systems) I have added photos to the Jolt, Super Jolt and Microcomputer Associates pages.

And separated the Jolt page into subpages J, Super Jolt and Microcomputer Associates pages.

Super Jolt

The Super Jolt is a evolution of the JOLT. Same CPU, 1 MHz clock, same TIM IC, same PIA, more RAM (1K), sockets for PROMS, RAP and Tiny Basic in ROM.

Sold under the name CP110 by Synertek  in 1985, Microcomputer Associates had become the core of Synertek Systems.



Gallery

Photos by Ray Holt of Microcomputer Associates.

Microcomputer Associates

Jolt was designed and developed by Ray Holt, Founder and Executive Vice-President of Microcomputer Associates. Holt went on to design the SYM-1 single-board computer, a KIM-1 clone. Manny Lemas was the co-founder of Microcomputer Associates, Inc. Ray Holt was the hardware side and he was the software side of the business. He wrote the DEMON (Debugger/Monitor) software for the JOLT. This software was actually developed for MOS Technology for use in the TIM chip and the KIM-1 single board computer. M.A.I. was granted rights to its own version of the software for use in the JOLT, so they used the TIM 6530-004 IC!

The Jolt microcomputer was released in 1975 by Microcomputer Associates. The company was founded by Ray Holt and Manny Lemas. The company was later acquired by Synertek, a second source manufacturer of the 6502, and renamed Synertek Systems. Synertek went on to produce the popular SYM-1 microcomputer. Ray Holt’s business partner was Hispanic and he used to call Ray “Jolt” which is the reverse-anglicized spelling of the word HOLT if written in Spanish. i.e “Jolt” in Spanish is pronounced “holt”. There were about 5000 JOLT units produced, first designed in 1974, far pre-dating the Apple I.

See the Microcomputer Associates Catalog in PDF format here

Micro Associates published the Microcomputer_Digest with general microprocessor related news:

Microcomputer Digest Index Vol01
Microcomputer Digest Index Vol02
Microcomputer Digest v01n02 Aug74
Microcomputer Digest v01n06 Dec74
Microcomputer Digest v01n07 Jan75
Microcomputer Digest v01n08 Feb75
Microcomputer Digest v01n09 Mar75
Microcomputer Digest v01n10 Apr75
Microcomputer Digest v01n11 May75
Microcomputer Digest v01n12 Jun75
Microcomputer Digest v02n01 Jul75
Microcomputer Digest v02n02 Aug75
Microcomputer Digest v02n03 Sep75
Microcomputer Digest v02n04 Oct75
Microcomputer Digest v02n06 Dec75
Microcomputer Digest v02n07 Jan76
Microcomputer Digest v02n08 Feb76
Microcomputer Digest v02n09 Mar76
Microcomputer Digest v02n10 Apr76
Microcomputer Digest v02n11 May76
Microcomputer Digest v02n12 Jun76
Microcomputer Digest v03n01 Jul76
Microcomputer Digest v03n02 Aug76
Microcomputer Digest v03n03 Sep76
Microcomputer Digest v03n04 Oct76
Microcomputer Digest v03n05 Nov76
Microcomputer Digest v03n06 Dec76
Microcomputer Digest v03n07 Jan77

Hear it from Ray Holt from an interview on YouTube:

Audio recording of VCF sessions:
Manny Lemas VCF 2 on SYM-1
Ray Holt on the F14 “Tomcat” CADC microprocessor. The World’s first microprocessor and the first time to discuss it in public

A newsletter was published, this one in PDF format is from 1977 and contains some Tiny Basic programs for JOLT and Super Jolt.

Synertek acquired Microcomputer Associates, Incorporated, consisting of engineers Manny Lemas and Ray Holt, after which it was renamed Synertek Systems, Inc. and established as a subsidiary. In 1978, Synertek Systems released a 6502-based single board computer/evaluation kit called the SYM-1, a derivative of MOS Technology/Commodore Semiconductor Group’s KIM-1. The Super Jolt was still sold by Synertek in 1985 (see the Super Jolt page).

Gallery

Images supplied by Ray Holt.

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Jolt

Jolt

Jolt was the first 6502 singleboard computer. On December 1975, the coveted inside-front-cover of Byte magazine contained a two-page advertisement for “the world’s lowest cost computer system”. This was perhaps the first non-MOS Technology 6502 based computer system to come to market, The computer was named Jolt, and it was marketed by Microcomputer Associates Inc. (MAI) as both a kit for $249, or fully assembled and tested for $348 (Dec. 1975 Byte). Microcomputer Associates also sold add-ons for the basic system. They included 4 kilobytes for $265, an I/O card for $96, and a power supply for $145. Either at that time or shortly later MAI expanded the line to a RAM card and an EPROM card using 2702 PROMS. The boards were about 4″x6″ arranged in a vertical stack jointed by a ribbon cable. Only 5 volt power was needed. Software available in PROM was RAP (Resident Assembler Program) and Tiny Basic from Tom Pittman.

As can be seen in the photos of the Jolt front, back and experimenters card below, the system is quite simple. In fact it is a TIM system (the 6530-004 is the middle IC), with a 6502 at the right and a 6820 PIA on the right. Some glue logic on the right and the top, RAM on the bottom (4x 2111 for 512 byte memory) and RS232 TTY interface at the right (1488, 1489 line drivers). The system clock was a RC at 750 KHz, in the photo the clock is a 1 MHz crystal added later.
The TIM IC, 6530-004,contains the ROM (1K), timers, 128 byte RAM, 16 I/O) and 64 bytes RAM. The PIA 6820 adds another 16 bit I/O.


JOLT SPECIFICATIONS SUMMARY

(See the Microcomputer Associates Catalog in PDF format here)
• MOS Technology 6502 CPU
• MOS Technology 6530 with DEbug MONitor (a 653-004 TIM)
• 750 KHz clock operation-RC controlled or crystal controlled with user supplied crystal.
• 512 bytes RAM
• 64 bytes RAM-located at interrupt vector locations
• Expandable address & data lines
• Direct drive to 8 K bytes of memory
• 26 Programmable I/O lines
• Two hardware interrupts
• Serial interface for 20 ma current loop and EIA RS232C
• 4.25″ x 7″ printed circuit card
• Compatible with other JOLT cards

Jolt User Newsletter

JOLT SYSTEM DESCRIPTION

The JOLT system consists of a set of modular microcomputer boards which can be used singly or tied together to produce any desired microcomputer system configuration. The minimum system is one CPU board. which alone constitutes a viable computer system complete with central processor. 1/0. interrupts. timer. read/write memory. and a complete software debug monitor in read-only memory. Additional boards in the JOLT system include a 4 K byte RAM , 1/0. Power Supply and blank Universal Interface board. A large JOLT system could have up to 32 K bytes of RAM memory. up to 128 lines of bidirectional 110 and 16 interrupts. JOLT boards come in kit form or assembled. and are ready to use in any form. from home hobby kits to industrial applications. All JOLT components are new. fully tested and fully warranted by MAI.

CPU
The internal oscillator operates in a “free run” mode with a capacitor and variable resistor supplied on the CPU printed circuit board. The frequency of oscillation may be adjusted with the variable resistor. If a very stable clock is required by the system a crystal may be added to the CPU board.
The RESET input to the CPU is pulled to logic ground by an RC circuit (t=33 milliseconds) on the printed circuit board. The CPU normally fetches a new program count vector from hex locations FFFC and FFFD upon activation of the RESET line, but these locations are in the interrupt vector RAM and therefore volatile. Hardware on the CPU board causes the CPU to begin executing the monitor program by forcing the effective sixteenth bit of the address bus  to a logic ZERO during reset. As a result, the RESET function on the JOLT CPU card causes the debug monitor (DEMON) to begin executing.
There are two interrupt inputs to the CPU. One interrupt is maskable under program control (IRQ) and the other (NMI) is not.
A READY control line provides for asynchronous operation with slow memory or I/O devices.
The address bus (A0-A15). the data bus (00-07). the two phase clock (PHI). the reset line (RESET). the interrupt lines (IRQ and NMI). and the ready line (RDY) are all available at the edge connector of the CPU board. The loading restrictions should be considered when using the signal lines driven by the CPU for external system expansion.

Program RAM
There are 512 bytes of program RAM provided on the CPU card. The program RAM is hardwired addressed as the first 512 bytes of the CPU’s 64 K of memory address space. It may become necessary to remove these RAM’s from their sockets if a 4 K memory card is also hardwired in this address space. The program RAM on the CPU card uses NMOS RAM chips type 2111, 512×4 bytes.

Monitor ROM and Interrupt Vector RAM
The monitor ROM is located in the last 1 K bytes of the lower half of memory space (first 32 K bytes). The interrupt vector RAM is located in the last 64 bytes of the 64 K memory address space. The monitor ROM and the interrupt vector RAM as well as additional I/0 are implemented with a single 6530 chip, the 6530-004 TIM

Programmable User I/0
The programmable I/0 lines available from the CPU card are provided by a Peripheral Interface Adapter (PIA) and a 6530 ROM chip. The PIA has two 8-bit 1/0 ports with two interrupt-causing control  lines each. Two jumpers are provided on the card which connects one or both PIA interrupt outputs to the CPU IRQ interrupt line. Refer to the CPU assembly drawing for proper identification of the jumpers. A Data Direction Register for each port determines whether each 1/0 line is an input or an output.  The 6530 ROM chip provides 10 additional I/O lines that may also be specified as input or output lines under program control. There are eight 1/0 lines from one port on the 6530 and two 1/0 lines from the second port. These I/0 lines may be used in conjunction with DEMON for interfacing a high speed paper tape reader to the CPU card. In the paper tape reader application, the eight 1/0 lines from one port are used as inputs and two I/0 lines from the second port are used to accomplish the handshake control between the reader and the CPU card.
The PIA is hardwired addressed as location 4000 to 4003 in the memory address space. Memory addresses from 4000 to 4003 are allocated for PIA devices so that the JOLT system may be easily expanded to accommodate up to eight PIA chips. The 6530 uses addresses from 6200 to 6E07 for eight I/0 functions. The unused memory addresses occur because address bits A10 and A11 are ignored to simplify address decoding. The 6530 I/0 lines may be referred to as Monitor I/0 because these lines are commonly used for a high speed paper tape interface.
See the TIM page for more information on timers and I/O.

Standard Interface Circuits
The JOLT CPU card provides direct interfacing with a 20 mA current loop and RS232C terminal. The 20 mA current loop requires +5 v and -10 v whereas the RS232C interface requires +12 v and -10 v. Both interfaces are wired in parallel on the input and output thereby allowing both interfaces to be used simultaneously.

JOLT SYSTEM MEMORY MAP
The memory map on the following charts explains what functions have been assigned to each segment of the JOLT address space. It is recommended that users respect this space allocation when adding memory and peripherals to their JOLT systems. Space has been reserved for 32 K bytes of user RAM or ROM, seven additional PIA devices, and’up to 512 user I/O device registers. Other areas are reserved for JOLT expansion, new JOLT peripherals and memory options will use these spaces. Users are advised to not use JOLT expansion space unless absolutely necessary. Note that some areas used by the JOLT CPU board and PIA boards have more space indicated than there are registers or locations in the device occupying them. This is because these devices do not decode all address bits, or use some of the address bits for special functions. For example, the 6530 timer determines the time scale and interrupt enable/disable by the address used to access it. Thus, these “partly filled” areas are actually entirely used and are not available for other uses.

(1) Standard on JOLT CPU board.
(2) Available to user-not used by DEMON.
(3) To get enable-interrupt address, add 0008 to disable-interrupt address with corresponding functions.
(4) Reserved for DEMON use, TTY control and reset functions

DEbug MONitor (TIM 6530-004)

Debug Monitor
The JOLT CPU card comes complete with DEMON, MAl’s debug monitor program. The program is located in the 1,024 byte, Read Only Memory (ROM) of the multi-function 6530 chip and is therefore
completely protected against any alteration. DEMON provides a permanently available general purpose monitor program to aid users in developing hardware and software for MAl’s JOLT series of microcomputers.
DEMON’s Features Include:
• Self adapting to any terminal speed from 10-30 cps,
• Display and Alter CPU registers,
• Display and Alter Memory locations,
• Read and Write/Punch hexadecimal formatted data,
• Write/Punch BNPF format data for PROM programmers,
• Unlimited breakpoint capability,
• Separate non-maskable interrupt entry and identification,
• External device interrupts directable to any user location or defaulted to DEMON recognition,
• Capability to begin or resume execution at any location in memory,
• Completely protected, resident in Read Only Memory,
• Capability to bypass DEMON entirely to permit full user program
control over system,
• High speed 8-bit parallel input option, and
• User callable I/O subroutines.
DEMON’s Command Set Includes:
.R Display registers (PC,F,A,X,Y,SP)
.M ADDR Display memory (8 bytes beginning at ADDR)
: DATA Alters previously displayed item
.LH Load hexadecimal tape
.WB ADDR1 ADDR2 Write BNPF tape (from ADDR1 to ADDR2)
.WH ADDR1 ADDR2 Write hexidecimal tape (from ADDR1 to ADDR2)
.G Go, continue execution from current PC address
.H Toggles high-speed-reader option (if it is on, turns it off; if off, turns on)
See the TIM manual for more information on DEMON, the name MAI uses for the TIM program.

RAP — 1.75K Byte Resident Assembler Program
(This looks like a predecessor of the RAE of the SYM-1). The JOLT Resident Assembler Program (RAP) is designed for use on JOLT systems equipped with at least 4K bytes of RAM memory. RAP has some significant advantages over conventional assemblers:
1. Resident as part of the JOLT system on PROM chips. The assembler never has to be read into volatile memory before use. It, just like the DEMON monitor, is instantly available. In addition, costly time sharing services are not needed for cross assemblies.
2. Operates on one pass of the source code. The source tape is read in only once, thereby increasing assembler speed by a factor of two over conventional assemblers that make two or three passes over the source code.
3. Small in size. The assembler is smaller by a factor of 4 or 5 over comparable assemblers. Its size guarantees the smallest number of PROM chips needed and minimizes printed circuit board space requirements. With the assembler PROM chips installed in your JOLT PROM board (at address E800 hex), the assembler may be activated by reading the source code input on the console input device and transfering to location E800 hex using the DEMON monitor. As source code is being read in, a listing is produced on the console printer and the object code is generated directly into RAM at the addresses specified by the origin directive (.ORG).
After the assembly is complete, the object code may be punched onto paper tape or executed directly using DEMON. The assembler assumes RAM at locations 1FFF hex and lower to be available for symbol table usage. RAP uses an efficient symbol table algorithm and users can normally expect that about 4 to 6 bytes of RAM will be used for each symbol or that a 3000 byte program would use approximately 800 bytes for the entire symbol table (locations 1CEO to 1FFF hex). This space need not be left unused if buffers,’ etc. are allocated to it. The Resident Assembler Program is compatible with the MAS Technology Cross Assembler with the following exceptions:
1. Expressions and * (used for current program counter) are not allowed.
2. Thee .OPT and .PAGE pseudo operations are not implemented.
3. Octal and binary numbers are not implemented.
4. .ORG is used instead of *= to origin program.
5. .RES is used for reserving storage.

The Jolt is somewhat famous for the part it played in the development of the prototype Atari 2600 VCS, which was assembled using the Jolt computer board.

This photo is one of the original wirewrapped prototypes for “The Worlds Most Popular Video Game” aka… The Atari Video Computer System (VCS) Model #2600.    The interesting and eye catching part of the unit besides the extremely intricate hand wired area (TIA perhaps?) are the controllers, you look and say “Hey those don’t look like the standard CX-40 joysticks I’ve come to know and love all these many years!”   The controllers are actually from the Atari/KeeGames TANK coin-op arcade game.   The actual Atari VCS joysticks would later come from a home console game of TANK which was sold under the Sears exclusive brand label.   The Atari Tank joysticks for a one player would act as left and right treads on the home tank game and then they popped out of the rectangular home console and could be used for two player action and would allow each user to use one joystick just like Atari VCS Combat (CX-2601).

  The above prototype designed by Ron Milner and Steve Mayer in Grass Valley, Ca. at Cyan Engineering (a company owned by Atari, Inc.)is actually a combination of many parts.   The wirewrap board was the original version of the STELLA chip.  The boards to the right are a memory board and a “Jolt” 6502  board ) and on the far left is a 5V power supply.  The above Stella prototype had actually been thrown out in the garbage at Atari at one point. Owen Rubin, one of Atari’s first programmers had found it in the trash and recovered this piece of history and placed it into the safe hands of Atari’s Employee #3, who built the first Atari Pong, Allan Alcorn.

History of Jolt Serial One, Bill Ragsdale (from http://www.old-computers.com/) 

Jolt was designed and developed by Raymond M. Holt, Founder and Executive Vice-President of Microcomputer Associates. Holt went on to design the SYM-1 single-board computer, a KIM-1 clone. In the late 1990’s Holt was finally given government permission to discuss his role in the development of the F-14 Tomcat. Holt claims he designed and developed the worlds first microprocessor one year before Intel.
Manny Lemas was the co-founder of Microcomputer Associates, Inc. Ray Holt was the hardware side and he was the software side of the business. He wrote the DEMON (Debugger/Monitor) software for the JOLT.
This software was actually developed for MOS Technology for use in the TIM chip and the KIM-1 single board computer. M.A. was granted rights to its own version of the software for use in the JOLT, they used the TIM 6530-004 IC!

I bought the first Jolt microcomputer out the door. I saw its advertisement (in Byte?) and was just starting a project in security access control. We were doing a crash project to demonstrate reading magnetic striped ID badges for Honeywell. We needed to accept a real-time bit sequence, extract numeric data and do a simple name vs. number lookup. An ideal job for a small processor. But remember, this was 1976. Development systems cost $5,000+ and none were offered for the 6502. (Later, MOS Technology offered one and Rockwell had a very good one.)
I ordered a Jolt system on a Wednesday or Thursday and was told Microcomputer Associates Inc. (Manny Lemas and Ray Holt) was awaiting the first silicon of their DeMon monitor to come by air from MOS Technology in two days, on Saturday. DeMon was a one chip Debug-Monitor containing 1K of ROM, 512 bytes of RAM, paralled IO, an ASCII serial interface and a monitor program. With the 6502 processor and a simple clock you could have a two-chip microcomputer. DeMon was later renamed Tim, Terminal Input Monitor.
MAI received their first DeMon chips about 9 AM Saturday morning, plugged in one, it ran, and I picked up the first unit at noon at their office. IIRC the Jolt had an inked-in serial number 0 or 1. Over the week-end I built a teletype interface as Jolt had a voltage output while the Teletype had current loop.

Gallery

Photos by Ray Holt of Microcomputer Associates.


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Synertek SYM-1 KTM

Synertek, Inc. was an American semiconductor manufacturer founded in 1973. The initial founding group consisted of Bob Schreiner (from Fairchild), Dan Floyd, Zvi Grinfas, Jack Balletto, and Gunnar Wetlesen. The manufacturing technology was MOS/LSI.
Initial products included custom designed devices, as well as a line of standard products (static RAMs, ROMs, dynamic and static shift registers) and then, sometime before 1979, second sourced versions of MOS Technology’s successful 6502 8-bit microprocessor, and the (less successful) Philips/Signetics 2650 processor and Zilog Z8 microcomputer.
Major customers included Atari (for its video game product line their biggest customer at a certain point of time) and Apple Computer (for its Apple II computer).
In the days leading up to the 1977 West Coast Computer Faire, Steve Wozniak chose to use a Synertek ROM chip for the Apple II, which was revealed at the event, after a chip from American Megatrends didn’t arrive on time.

Here some pages with information on Synertek, Micro Associates and my SYM-1 systems.

The Jolt from Micro Associates and initialy not a Synertek product, has its own page here.


Synertek Databook 1983 Chapter 5 Systems

My VIM-1:

My current SYM-1:



Synertek acquired Microcomputer Associates, Incorporated, consisting of engineers Manny Lemas and Ray Holt, after which it was renamed Synertek Systems, Inc. and established as a subsidiary. In 1978, Synertek Systems released a 6502-based single board computer/evaluation kit called the SYM-1, a derivative of MOS Technology/Commodore Semiconductor Group’s KIM-1.
Synertek’s semiconductor fabrication plant in Santa Clara, California operated from 1974 to 1985. Sometime after 1979, Synertek was acquired by Honeywell and set up as a subsidiary. Later, around 1983, construction began for an additional manufacturing facility in Santa Cruz, California. There was Superfund attention to pollution at the Synertek factory site. When market conditions deteriorated, primarily because of business downturns at Atari, work was stopped at the Santa Cruz facility and it was later sold. Honeywell shut down operations at Synertek in 1985 and assets were sold off (from Wikipedia).

Part of Chapter 5, systems, of the Synertek Databook 1983, note the Jolt was still available.



The end of Synertek Systems in 1985:


Photos by Ray Holt

 

 

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Jolt and Super Jolt

On these pages some information on the Jolt and Super Jolt are presented, the result of a Internet research for Jolt, Super Jolt and Microcomputer Associates. Microcomputer Associates company played an important role in the 6502 SBCs, TIM, KIM-1 and SYM-1 all contain results of their work. It continued as Synertek Systems with the SYM-1 and more.

Jolt page

Super Jolt page

Microcomputer Associates page