S100 computers

S100 computers. S-100 computers, consisting of processor and peripheral cards, were produced by a number of manufacturers. Probably as many as 1000 different types of these S100 boards were sold starting in 1976 and running into the mid 1980's. The first name for the company was Kentucky Fried Computers. There was power-on jump directly to on-board EPROM with optional wait states for the on-board EPROM. This CPU has a bi-directional 8 bit data path, however because Ed Roberts wanted to control it via a series of front panel switches, the CPU data bus was broken out into separate 8 bit Data In and Data Out paths on the S-100 bus. INTRODUCTIONA number of the later S-100 board manufactures had their own 80286 CPU card. This software can be seen here and downloaded here. Nov 30, 2017 · IO_REQUEST = sINP + sOUT. This board is a general purpose PROM (programmable read only memory) module compatible with the S-100 computer bus. Nov 1, 2018 · Two of the 3 8212's (J5 & J3) J2 the 74HCT245. Small enough to easily fit in a pocket, the little computer The Trenton Computer Festival This annual event started back in the 1980's and was a must attend gathering for anybody with a S100 bus system in those days. 1 x USB Type-C (for power only) The little computer also has an Intel AX200 wireless card with support for WiFi 6 and Cromemco was a Mountain View, California microcomputer company known for its high-end Z80 -based S-100 bus computers and peripherals in the early days of the personal computer revolution. Chuck Grant and Mark Greenberg. Sep 13, 2022 · The Raspberry Pi Monitor Software Total control of the S100 bus is obtained by programming the Raspberry Pi in C code. In 1976, designers at Motorola began working on a 16-bit microprocessor to compete with the Intel 8086 CPU. JED file is here:-. It often includes the IEEE-696 standard based on that bus. An S-100 Extender BoardIntroduction If you do any kind of serious work with your S-100 system you will need an "Extender Board". txt ← Digi-Key without edge connectors. 5mm audio. Feb 5, 2019 · An S-100 8080 CPU Board. You should receive a response within 24-48 hours granting access. Aug 6, 2022 · By the early 1980’s Cromemco was the top-selling S-100 computer manufacturer, but the party came to an abrupt halt when the IBM PC (with its new “ISA” bus) appeared. Although it is a single-board system, it is also an S100 machine with an optional buss expanion and cage. This forum is unfortunately no longer active. It offered three serial I/O channels and 2 8-bit parallel input/output channels for Interfacing with multiple peripheral devices such as printers, modems, and terminals. Oct 23, 2017 · The S-100 bus was the first industry standard expansion bus for the microcomputer industry. In 1978 this was upgraded to a Z80 and the speed over time increased from 1MHz to 4MHz. This web site is setup for people who are interested in vintage S-100 bus based computers. To cut to size. Added socket for the FT232 module. Later many commercial and homebrew S-100 systems had at least 16-18 slots in a board cage to which multiple boards from multiple manufactures were added. The S100 Tempered Glass edition micro chassis combines sophistication, elegance, and simplicity and is built with modern steel construction. As we have done for all the other S100 bus CPU bards, we will first bring up the board in a very simple mode where it simply continuously sends a character to the console. Their machines were priced accordingly, being function for function S10 or S100 with FLARM and Oudie A complete flight computer system includes a FLARM, the S10 or S100 variometer, and an Oudie running SeeYou Mobile soaring flight software. This XCOMP hard disk controller was in fact Oct 25, 2013 · The SOL was met with great success initially. The main changes are:--. The S-100 bus is a little unusual in that unlike many other computer busses the power supply to the cards is distributed to voltage regulators on each card. Jan 28, 2024 · This is a common circuit we have often used to activate 8 and 16 bit data buffers for R/W on to the S100 bus. Anchor Electronics has the S100 connectors for $3. The old 8086 style "bus-interface unit" (BIU) was considerably enhanced. Feb 4, 2024 · The S-100 bus or Altair bus, IEEE 696-1983 (withdrawn), is an early computer bus designed in 1974 as a part of the Altair 8800. There are also sockets for 512 bytes of random access memory (RAM). The SBC-100 is a single-board Z-80 computer manufactured by American hardware and software manufacturer, SD Systems. A switch was provided to slow the 8085 down to 2 MHz for software dependent timing loops that want to run at that speed and are not easily changed. The ageing S100 bus community needs new users. Serial IO is primarily used for communication with a CRT terminal, though some printers also used serial IO. Z80 This is the EPROM based software that controls every aspect of the board. Later dubbed Mar 15, 2024 · Welcome to the S100Computers. There are many types of soaring flight computers available ranging from enhanced electronic variometers (such as the S100, Eos), to apps running on mobile devices (such as Oudie, XCSoar, SeeYou Navigator), to full up flight computers (such as the LX9000, Zeus and ClearNav). Over the years, many S-100 systems were constructed without this capability, but it is believed that the general populace of current S-100 enthusiasts prefers systems with front panel capabilities. The other board actually processed the data and fed it to the system CPU via the S-100 bus. MDS-AD3 and 2S-64k. S-100ZFDCv1. It was well attended. This S-100 backplane is an 9 slot active terminated motherboard for building and/or repairing small S-100 systems. Sales of all S-100 systems including Cromemco’s machines almost immediately faded. Nov 16, 2023 · 2 x HDMI (4K@60Hz) 1 x 2. Nov 30, 2017 · S100 Computers - 80286 CPU Board. A must have book BTW, for anybody doing S-100 Computers hardware. No other pins were connected to the board. For example, one teletype and two TV typewriters with keyboards could be operate simultaneously with the 8800 through only one 3P+S. The C code is actually quite large with many repeatedly utilized routines. D. Other MITS S-100 Boards. In fact the S-100 bus in the H/Z-100 system was used only for specilized components like a FDC or hard disk controller. Introduction Many S-100 board manufactures had their own Video boards. 95 each, not as nice, but still very serviceable. It has 128 Microcells which can have up to 40 product terms each. The very early ones were restricted to 64 characters/line (for example the SSM board) but soon 80 characters per line became common. The board could call any one of the S-100 interrupt lines. Int 3 Based DebuggingThis is the old Intel single byte "CC debug opcode" debugging option. You’ll need a few, since 38 positions is a 2x19 strip. and the SD card holder. The layout of the board with its pinout from the 8080 CPU essentially defined the function of the S-100 bus pins. Their focus was software more than hardware. Jay Cotton and I (John Monahan), were there to answer many questions about S100 computers and our new boards - particulary the Z180 SBC. An S-100 Bus 8 Bit VGA Video Board. The on-board EPROM could be used in shadow mode (access only after power-on or reset) allowing Mar 8, 2014 · Seattle Computer Products -- History. Nov 18, 2021 · The Intel Edison S100 Bus CPU Board. May 30, 2022 · S100 BUS 8 & 16 BIT DATA PATHS. Board Name. This motherboard had pull up and down resistors on each of the data, address and control lines to reduce signal noise. The 8085 could of course directly address 64K bytes of memory, but the board had a built-in Memory Manager scheme that allowed Thermaltake S100 Tempered Glass Snow Edition Micro-ATX Mini-Tower Computer Case with 120mm Rear Fan Pre-Installed CA-1Q9-00S6WN-00, White Visit the Thermaltake Store 4. They were having problems with a 16K RAM board at one stage. The board utilized only the power lines from the S-100 bus. Open the folder of interest and follow the necessary steps. While a few other S-100 computer companies had some support logic on their motherboards, for example Vector Graphic, only Heathkit had the CPU, support RAM/ROM and I/O (including video) on the motherboard. Opens in a new window or tab. This page contains a listing of many of the S-100 card that I currently have in my collection. They had some good hardware designers and a young assembly ROMAC H19MK101 - H19 Video Terminal Board. PDS file required to generate the ABC. This was a somewhat unusual S-100 board but really useful if you wished to experiment with sound on your computer. Mar 8, 2017 · S-100 Motherboard. The best computer for most people. ROM shadowing allowed external memory to overlap portions of the 32K bytesavers address space. This unit can’t cover the breadth of these devices Feb 1, 2019 · The Altair 8800 debuted in 1975, and other companies soon began to imitate it, right down to its 100-pin expansion bus. The Altair 8800 debuted in 1975, and other companies soon began to imitate it, right down to its 100-pin expansion bus. Furthermore, a number of older S-100 bus RAM cards would not work Nov 29, 2021 · Next we will utilize software to switch the Edison to/from the mode where it can monitor the major S100 bus signals while running a different CPU. Thanks to the help of some great people on the VCF forums, I've restored this massive Z80-based computer. students. This board has the distinction as being the first S-100 board ever designed. This indicates the board is correctly reading data from the S-100 bus. It often includes the IEEE-696 standard based on Fully restored 1979 Cromemco Z-2D S100 computer. Jan 24, 2024 · The Full size 80486 & 32MB OTT RAM (4 layer) boards are $32 each. Since then they have made video boards for every major bus architecture, including the Multibus, NuBus, and the current industry standard, the PCI bus. vintagecomputermuseum (7,874) 100%. Feb 1, 2019 · PC Pioneers: The Forgotten World of S-100 Bus Computers. Every serious S-100 board manufacture had their own CPU card. Whole books have been written on power supplies. The board has provisions for 71/2 kilobytes of ultraviolet erasable proms (EPROMs). The Telemark Assembler (TASM) is a table driven cross assembler for the MS- DOS language), can be assembled with TASM, and the resulting object code Jan 11, 2020 · The 3P+S Input/Output S-100 board was designed to meet all the I/O needs of most early 8800 system users. The Breakpoint and Single Step circuitry come directly from Sol Libes & Mark Garetz's book "Interfacing to the S-100/IEEE 696 Microcomputers". Like other Cromemco memory cards, the board operated at 2 or 4 MHz (user-selectable), without wait states, in the usual sequential addressing class of operation. In fact in 1977 it was the number one S-100 computer sold in stores. Jan 11, 2021 · This is a common circuit we have often used to activate 8 and 16 bit data buffers for R/W on to the S100 bus. View at Amazon. The history of the development of the Cyclops cameras and the TV Dazzler is given here. Next solder in all the required IC sockets, resistors, resistor arrays, capacitors, jumpers, dip switches and the voltage regulator. It provides the following features:-IDE interface An interface from the Z-100 S-100 computer bus to the industry standard IDE hard drive interface. 7MHz - 5MHz) CPU. e. Simple instructions (such as MOV reg, reg) executed in one clock cycle. May 30, 2021 · There are two components:-ZFDC. Don't even think of using it in your S-100 system! The manual for this board can be obtained here. Nevertheless most S100 and CPM based software stuck with the Intel 8080A, its Jun 14, 2019 · PLUS can be indispensable for helping to bring up a new S-100 system, troubleshoot a malfunctioning system, help to test other S-100 boards, and as an aid to assembly language programming. The relevant ABC. 99. /16BIT = TMA0 * TMA1 * TMA2 * TMA3. Jan 2, 2022 · There are three features the 80386 comes with to facilitate debugging. While almost everybody started off with Altair or IMSAI cards. Then things started to go wrong. The first equation generates the I/O request signal using the S100 bus signals sINP and sOUT to identify a I/O port bus cycle, this signal is output on pin 21 passed to GAL U2 pin 13. Cromemco SCC Z80 Single Board Computer S-100 with Manual and 3K Control BASIC. These boards were designed to work with 8" IBM single density format on Calcomp floppy drives Dynabyte -- History. May 4, 2016 · Morrow - HDC-DMA Hard Disk Controller. S-100 Console IO Version 2. , and was founded by Rod Brock in the mid 1970's. I found in the past that sometimes my soldering of the TXB0108 8-bit Bidirectional Voltage-Level Translators was not always 100% The Vector 1 initially came out with an 8080 CPU (1977) as Vectors first complete S-100 system. computers existed. It had on board a socket for a 2704/2708/2716/2532 EPROM which could be addressed on any 1K, 2K, or 4K boundary. The Z-80 CPU ran at 4MHz. It was a two board set. North Star Horizon. Up to three drives could be controlled, with or without interrupts. 1K RAM 4K RAM 4K Dynamic RAM 16K RAM 16K Dynamic RAM 4PIO 8080 CPU VI/RTC PCI ADC. One of the most spectacular early S100 boards was the Cromemco Dazzler Video Board. The DJ pluged into an S-100 bus slot in a system with an 8080, 8085, or Z80 (1. Of particular usefulness is the ability to use IDE to Compact Card Flash memory cards with this board. Mountain Hardware - 100,000 Day Clock Board This board was designed to provide the date and time for S-100 systems! Time events in 100 usec. A number of people saw the need for a "homebrew" S-100 based 6502 CPU board. Jun 18, 2023 · A Serial IO S-100 Board. 2 Type-A. The HDCDMA will support a mixture of types of drives, but all must Mar 15, 2024 · 1. It contained much valuable information however. Use a magnifying glass if need be. Also open the app on your PC and select the "Connect" option. It has evolved over the decades to a more generalized computer festival. Wait until the synchronization is completed. Oct 8, 2016 · First, unlike most later S-100 boards, this early board would only display graphics with the corresponding Cromemco CPU board the "ZCPU" board. Description/Features. IntroductionMany S-100 systems have some kind of Serial IO board in their system. 00 without S-100 female connectors. 3 x USB 3. Since the typical capacity of a CPM system is up to 8MG capacity, almost any old IDE drive is suitable. The chip is capable of very high speed operation (125MHz), is TTL compatible, able to sink 12 milli-amps per output pin. The controller had a cable connector for attaching a flat cable to the first floppy disk drive, and can control a chain of up to four drives daisy chained on this cable. The 64FDC provided a complete system for floppy disk operation: serial I/O for an RS-232 terminal, a read only memory programmed with system bootstrap and diagnostic routines S100 Computers Most experienced S100 bus users have these boards or are at least familiar with them enough to build one. Tarbell Electronics followed their first single density FDC with this double density one. A second connector on the DJ was provided for attatching a terminal device. These early 8080 based cards were quickly replaced by faster Z80 CPU boards. org requesting edit/forum access. The board was available as either a kit or assembled. $199. Next fine tune the above by:-QOD2,FCF0,3FFF,0S3FF0,F4 Reset the system Enter the "W" command (This has the Z80 input from port EDH transferring control over to the 8088). Go to myS-100 home page for more information about the MITS Altair and other S-100 computers. Added jumpers to be able to create a Memory Write signal without a Front panel (allows board to work stand alone, no need for front panel). 6 4. To get edit access to this wiki & posting access to the forum, complete the user registration form on this wiki and then send an email to admin@retrobrewcomputers. May 28, 2020 · The Godbout 19 slot S-100 bus board was one of the most popular. com home page. IO was the old Bitstreamer I, 1K RAM boards initially and a Flashwriter 1 VDB. It was the basis of Apple II and a related chip, the 6507, for the Atari desktop line. Based on the key features of S series chassis TG, the S100 TG is designed to be even more compact and is manufactured with one tempered glass window on the left for a stunning view and one preinstalled 120 mm standard fan at the rear for fundamental Flight Computers. This board looks primitive by today's standards but it should be remembered that then some minicomputers did not have gold plated edge Aug 11, 2018 · The Cromemco Z-2 computer was their own first a Z80 based microcomputer system and was made for many years in forms of increasing complexity. Runs at 2 or 4 MHz and has a whopping 64k of RAM on an S-100 backplane. Feb 8, 2023 · Google Groups: N8VEM-S100. [1] [2] [3] Like most S-100 machines of the era, it was built around the Zilog Z80A microprocessor, and typically ran the CP/M operating system. The S-100 bus formed the basis for homebrew computers whose builders (e. The Vector Graphic 48K Dynamic Memory Board Oct 23, 2017 · The board can either be directly soldered to the S100 board or reversibly connected via a 2X25 pin connector. This is perhaps one of the most unusual S-100 boards in the collection. S-100 RAM&ROM v2. An S-100 80286 CPU Board. Here is a picture of the early pair of SMB prototype board pair:- Intel 80486 CPU From a performance point of view however, the architecture of the 80486 was a vast improvement over the 80386. The Processor Technology SOL Terminal Computer started out as a simple terminal, and grew into a full computer. These largely forgotten computers have now experienced a revival of in interest by hobbyists. Fortunately somebody convinced them to change it early on. It occupies the lower 48K of memory, i. In the case of our ISA to S100 bus converter board a single GAL can handle the job:-. Unlike Intel, they wanted to eliminate Jun 23, 2019 · The Power Supply. Nov 29, 2017 · The project evolved. An Edison-TXB Adaptor Test Board. The first Alpha Micro computer was the S-100 based AM-100. 5 GbE Ethernet. up to 100,000 days (273 years) were possible. The Edison packs a huge amount of tech goodies into a tiny package while still providing the same robust strength of your go-to single board computer. Click the card name for a high resolution view of the card. There was good local talent there seeded from the Bell Labs community. Daves Old Computers - S100 Cards. The board is based on the S-100 bus standard. Thanks to the work of Andrew Bingham it has been collected and is now stored on the S100Computers web site here. Many had a number of them. These are complicated boards, except for the Z80 SBC, most boards here will be held for long term "regular/experienced" S100Computers users. g. Installed S-100 cards: NorthStar: ZPB-A2. , the Homebrew Computer Club) implemented drivers for CP/M and MP/M. They originally made a floating point math processor board for the S-100 bus. . In this case the S10 or S100 receives FLARM data from the FLARM and adds GPS, airspeed, wind and variometer data and sends it on to the soaring flight software in the Oudie. Jul 3, 2021 · S100 Computers - 68030 CPU Board. It was produced by North Star Computers, and it could be purchased either in kit form or Jul 3, 2022 · This increases tremendously the range of drives you can use to run CPM, CPM86 and MS-DOS with on the S-100 bus. These routines totally synthesize ALL the S100 bus signals neede4d to display/change RAM or a Port. Seattle computer products (SCP) was located on Industrial Drive, Seattle, WA. Nov 30, 2017 · None of the major S-100 Bus board manufacturers made a 6502 based CPU S-100 boards. 2. One board was used to interface with the hard disk (s) and connected to the hard disk via two cables. Clip with a wire cutter one pin past that required pins and then file down to size. Support for 256x4 DRAMs saves board space and provides cost savings. The Vector Graphic 48K Dynamic Memory Board provided 49,152 8-bit bytes of random access memory, using 24 16K dynamic memory chips. The interface ran at the standard speed of 250,000 bits per second, and the normal formatted capacity per diskette of 256 kilobytes. With the advent of multi-user S-100 systems, serial IO was almost always used to connect the multiple terminals/users to the system. A big hurdle for anybody getting into building and using an S100 bus computer is the above need to have several fairly complex boards built and functioning correctly right from the start. Later dubbed S-100, the bus became the basis of the first personal computer Oct 1, 2021 · S100 Computers - Extender Board. The company started in Berkley CA. Connect both devices to the same Wi-Fi network. Run the app on the phone. May 7, 2010 · Morrow, like other early S-100 manufacturers, started with board products; then produced S-100 systems; and in the 1980's assembled single-board systems such as the Pivot. Business. Apple's 24-inch iMac is our top recommendation for a basic PC because the Apple M3 chip The Z100 IDE Interface is a multifunction S-100 board designed for the Heath/Zenith Z-100 Series computer but in reality could be used with most S-100 systems. The S-100 bus was designed around the 8080 CPU. 06 postage. 3. These boards moved the S-100 bus capabilities into the 16 bit world and past the 1MB memory addressing capability of the 8086. + EUR 41. The Z-2 series was capable of supporting up to 21 S-100 boards and could be configured with any of the boards supplied by Cromemco. This sound effects board utilizing two of the General Instruments AY-3-8910 programmable sound generators allowed your computer to generate an infinite number of real time complex Sep 12, 2022 · S-100 Utility Boards. This was an early forum setup by Andrew Lynch which discussed many topics about S100 and other computer boards. The chip can be reprogrammed thousands of times and is claimed to have up to 20 years of data retention. glitchwrks (3,239) 100%. As of Jan 2011 the parts with S100 connectors runs about $149, and $24. IMSAI - FDC Boards. Cromemco attempted to counter IBM’s PC with a 16-bit Motorola 68000 CPU microprocessor Digital Research Computers -- Sound Effects Board. If the description contains a file size/type in brackets, then the manual or other documentation for the card may be Jade called this board the "Big-Z". Take care to insert the 8080A on to this board upside-down. from United States. The next festival is on March 18, 2017 at the usual site -- The Trenton College of New Jersey. The company began as a partnership in 1974 between Harry Garland and Roger Melen, two Stanford Ph. Later dubbed S-100, the bus became the basis of the first personal computer Jun 26, 2015 · Alpha Micro - History Alpha Microsystems was founded in 1977 by John French, Dick Wilcox and Bob Hitchcock. Feb 17, 2019 · DAZZLER II Video Board. It runs an operating system called CDOS, which is very similar to CP/M (and later, MS-DOS). But in the late 1970's S-100 systems were a large, arguably dominant, segment of the personal and business microcomputing market; they were a strong presence through the mid Feb 1, 2019 · The Altair 8800 debuted in 1975, and other companies soon began to imitate it, right down to its 100-pin expansion bus. or Best Offer. Nov 30, 2017 · S100 Computers - VGA Board. The double-sided, solder-masked PCB featured gold-plated edge connectors for S-100, 26-way USART and 26 Scion -- History In 1978, Scion developed its first video board for the S-100 bus. beginning at 0000H. Right from the get- go they made it clear they were not targeting the home/hobbyist community but instead the small business community. 6 out of 5 stars 1,519 ratings Jan 21, 2024 · The MINISFORUM S100-N100 is a tiny computer with an Intel N100 Alder Lake-N processor, 8GB of LPDDR5 RAM and 256GB of UFS 2. This is a card that fits into your S-100 bus and brings the bus edge connector up to the top of the buss that you can easily access the boards components. The Intel® Edison is an ultra small computing platform that was first announced in March 2014 and after some changes produced in September 2014. Most initially were character based "video TTY's". Propeller Driven Console IO board v2. Jun 26, 2016 · S-100 8080 CPU Board Rev 1. 1 x 3. 04 ea. The history of these boards is reflected in the history of the companies that made them. It is primarily intended for bench-top work to repair and/or build boards without risking valuable legacy S-100 chassis. The builder supplies their own power supplies, connectors, and other components. Connection to the input or output ports is made Other CompuPro S-100 Boards CPU8085-88 CPU86-87 CPU-Z Disk1 Disk1A Disk1B Disk2 Disk3 EconoROM2708 Interfacer 1 RAM Boards Interfacer 3 Interfacer 4 Interfacer II M-Drive MPX-Board PC-Video System-Support1 System-Support2 SPIO Spectrum SP186 CPU-286 68000 32016 SPUZ Nov 30, 2017 · The chip provides register-level compatibility with standard IBM VGA modes and backward compatibility with EGA, CGA, MDA. 03. The CPU was the WD16 microprocessor chipset (5) from Western Digital . Ordering Older Boards Also a few long term users maintain a stock of some of our most popular boards. The Edison Software Total control of the S100 bus is obtained by programming the Edison in C code. The North Star Horizon was a popular 8-bit S-100 bus computer introduced in October 1977. Oct 1, 2021 · S100 Computers - Extender Board. This board corrects some of the small errors on the earlier Rev 0 board. In fact the board was often used outside the bus by simply connecting the required power lines to the solder points on the top Oct 25, 2013 · It's included here just for completeness or if you are a collector. The RetroBrew Computers Forum is available for community discussion. There is no regulated +5 volts line for example. S-100 Boards This section of this web site is dedicated to the description of S-100 bus boards. and Hercules modes. I kept adding more and more functions. Similarly, one RS-232-C modem, a teletype, and one TV typewriter plus another parallel data device could The Vector Graphic Bitstreamer II Board was an all-purpose input/output board for S-100 systems. The S-100 bus was the first industry standard expansion bus for the microcomputer industry. The Vector1+ was a slight enhancement, moving some power supply components back Oct 25, 2013 · The 8088 ran at 8 MHz and the 8085 at 6 MHz to maximize through­put. The Tarbell Double Density Interface was an IBM soft sector floppy disk interface using the Western Digital 1791/1793 Floppy Disk controller chip and built to the IEEE S-100 Standard. It can communicate with up to four 5 1/4 inch or four 8" hard disks. Sep 10, 2022 · 1. The enhanced graphic and text modes provide high-resolution displays in 4, 16, and 256 colors. Apple iMac 24-inch. This was another well designed S-100 Hard disk controller board. If you insert the single byte, 0CCH, anywhere in your code the CPU will immediately do an Interrupt 3. Place the board in your S100 bus and check you are getting +5V on all the appropriate pins of Aug 6, 2023 · S100Computers had a stand at the 2023 Vintage Computer Fdestival West on August 4,5 2023. These computers were the first home computers people used before IBM-PC, Apple etc. Introduction. Processor Technology established a nationwide dealer network and developed a very loyal user group network. They claimed it could be used in ANY S-100 bus computer using a Z-80 CPU board -with minor modifications. Jul 31, 2011 · S100 Computers. The term "S-100 bus" refers to the bus architecture of the MITS Altair 8800 computer of January 1975, and subsequent variations of bus-compatible computers of the 1970's, 80's and beyond. While the Dazzler would not interfere with other S-100 bus CPU boards, the image displayed on the screen was always a blank white color. Commands and data were transferred under software control by the technique of memory-mapped I/O (no I/O ports or DMA were used). The WD16 was a 16 bit CPU, completely symmetric source and destination addressing modes. Jun 10, 2017 · The 64 FDC was Cromemco's third-generation floppy disk controller board. The controller consisted of two S-100 boards connected together with a cable at the top right of the board. Donated by Richard Parsons. Z80 Based /Western Digital 2793 Floppy Disk Controller Board. In fact a few extra functions are also added. Feb 29, 2024 · Leonard Young recently pointed out better sockets are available from Mouser (Preci-dip 833-87-038-10-001101)as part 437-8338703810001101 for $3. Like MITS/Altair at the time the IMSAI Floppy disk controller was spread over two boards. digikey_s100_bom. The controller allows transfer of between one and ten 256-byte blocks of Oct 25, 2013 · MITS - 8080 CPU. The former situation will not utilize more than one S100 bus card slot. Oct 25, 2013 · The PIO 4 board provides for up to four input and four output ports of eight bits each parallel input and parallel output. On the S-100 side the board appears as one 8 bit output port and a 2 bit input status port as well as an 8 bit input port with a 1 bit output status port. 2K PROM 8K PROM 88-2 SIO SIO-B MITS FDC Boards TurnKey Board. This was a time before the Western Digital 1771/1791 LSI FDC chip was available and such boards had to be made from simple 7400 type chips. Dynabyte come on to the scene around 1978 with, at the time, a fairly sophisticated complete S-100 series of systems. Initially they made S-100 memory boards employing local Seattle area high-school students to assemble them. View at Best Buy. TDL sprung up in 1976 out of the electronics community around Trenton NJ. txt ← Digi-Key BOM with S100 edge connectors digikey_s100_withoutedgecon_bom. This option goes back to the early Intel CPU's. Software was usually either CPM86 or a variation of MS-DOS. Home: S-100 Boards : History: New Boards: Software: Boards For Sale: Forum: Other Web Sites: News: Index Solid State Music - CB1 8080 CPU Board Install the software on your computer and Doogee S100. It was held at the Computer History Museum in Mountain View CA. The Cromemco TV Dazzler was originally developed as a display device for the Altair Cyclops version of the Cyclops camera developed by Terry Walker. This interface is very similar to the 1011A Tarbell Single Density board The Master and Slave boards could communicate through this bus faster than the S-100, and it also had memory mapping ability. It offered substantial feature and benefit improvements over the earlier 4FDC and 16FDC boards. Technical Design Labs (TDL) - History. 1 storage. It also offered a 55 H2 real-time clock which can interrupt the CPU for In this way, no part of the computer 64K of memory needed to be dedicated to Read-Only-Memory (ROM). This Hard Disk/Direct Memory Access (HDCDMA) Hard Disk Controller is a single board S-100 bus subsystem. May 10, 2018 · NorthStar Computers was the brainchild of Drs. May 14, 2016 · The first step is to examine the board carefully for scratches or damaged traces. The company was named for their residence at Introduction. They were the first to see the advantages of using a Z80 CPU instead of an 8080 on the S-100 bus. The wanted to have a CPU with internal 32 bit registers and an external 16 bit interface. Nevertheless the MOS (and later WDC), 6502 CPU turned out to be a very popular microprocessor. The company is one of the few S-100 board companies on this list that has survived and done well over the last DAVES OLD COMPUTERS - S100 Cards. Oct 25, 2013 · The controller was a single PC board that plugs directly into the S-100 bus. It has a huge power supply, a rock solid motherboard and card cage. It had great potential, unfortunately the software to use was never fully developed beyond the lab and a single test site, ISTR that this was deprecated in later versions (the traces were still there, but the area was not cut out for a connector and it was not gold plated). The 68030 S100 Bus CPU Board. The board had Cromemco style bank select caoability allowing memory expansion beyond 64K. Nov 30, 2017 · The D7 LED should come on and the 8080 CPU "HALT" LED D3 should light up. Vintage Cromemco CS-2 S-100 Computer Back Panel Power Supply Ships Worldwide. EUR 275. S100 Computers . Each input and each output port had its own latch and both input and output latches were provided with hand­shaking logic for conventional eight bit parallel transfers. ha aq hf oo pa vh dw xl jn ri