ID MITS Altair 8800
Short Name
Name Altair 8800
Company MITS
Description This computer was one of the first "home" computers ever made, it was sold as a kit, but for additional money, you could buy one fully assembled.
It had no keyboard, the "program" had to be entered with the switches located on the front panel of the "computer", and as it didn't have video output (yet), the result was displayed via LEDs.
Another computer which had almost the same characteristics was launched by IMSAI and was called IMSAI 8080 (see both in the "Emulators" section).
The ALTAIR 8800 had one input port, also called the "Sense Switches" (I/O address 255) which was the left hand 8 address switches. Address 255 was also used on the IMSAI. The IMSAI front panel differed from the Altair in that you could also output to port 255 to a displayed LED buffer above the sense switches - a feature the Altair did not have (it only had input). The Altair sense switch were used during boot into Altair DOS to specify the terminal port to the DOS.
MITS made several peripherals and cards for this computer, namely, a video card, a serial card to connect a terminal, a RAM expansion card and a 8" floppy drive that used hard sectored floppies and stored 300 KB.
Several models were launched, they had the same characteristics except the CPU (8080 and later 8080A).
Believe it or not, the name "Altair" comes from Star Trek! The young daughter of the 'Popular Electronics' magazine editor gave it the name of the destination planet of the Enterprise from the episode she was watching.
Date Available 1975
Type Computer
Emulators simh
Alternate Names MITS Altair 8800
Links
Matches tosec MITS Altair 8800 - Applications - [BAS]
tosec MITS Altair 8800 - Applications - [BIN]
tosec MITS Altair 8800 - Applications - [CAS]
tosec MITS Altair 8800 - Applications - [DSK]
tosec MITS Altair 8800 - Applications - [TAP]
tosec MITS Altair 8800 - Boot Loader
tosec MITS Altair 8800 - Demos - [BAS]
tosec MITS Altair 8800 - Demos - [BIN]
tosec MITS Altair 8800 - Firmware
tosec MITS Altair 8800 - Games - [BAS]
tosec MITS Altair 8800 - Games - [BIN]
tosec MITS Altair 8800 - Games - [ROM]
tosec MITS Altair 8800 - Various - [BIN]
tosec MITS Altair 8800 - Various - [DSK]
tosec MITS Altair 8800 - Various - [HEX]
oldcomputers 62
emutopia 310
tosec MITS Altair 8800 - Applications - [BAS]
{
    "id": "MITS Altair 8800 - Applications - [BAS]",
    "name": "MITS Altair 8800 - Applications - [BAS]",
    "altNames": [
        "MITS Altair 8800"
    ]
}
tosec MITS Altair 8800 - Applications - [BIN]
{
    "id": "MITS Altair 8800 - Applications - [BIN]",
    "name": "MITS Altair 8800 - Applications - [BIN]",
    "altNames": [
        "MITS Altair 8800"
    ]
}
tosec MITS Altair 8800 - Applications - [CAS]
{
    "id": "MITS Altair 8800 - Applications - [CAS]",
    "name": "MITS Altair 8800 - Applications - [CAS]",
    "altNames": [
        "MITS Altair 8800"
    ]
}
tosec MITS Altair 8800 - Applications - [DSK]
{
    "id": "MITS Altair 8800 - Applications - [DSK]",
    "name": "MITS Altair 8800 - Applications - [DSK]",
    "altNames": [
        "MITS Altair 8800"
    ]
}
tosec MITS Altair 8800 - Applications - [TAP]
{
    "id": "MITS Altair 8800 - Applications - [TAP]",
    "name": "MITS Altair 8800 - Applications - [TAP]",
    "altNames": [
        "MITS Altair 8800"
    ]
}
tosec MITS Altair 8800 - Boot Loader
{
    "id": "MITS Altair 8800 - Boot Loader",
    "name": "MITS Altair 8800 - Boot Loader",
    "altNames": [
        "MITS Altair 8800"
    ]
}
tosec MITS Altair 8800 - Demos - [BAS]
{
    "id": "MITS Altair 8800 - Demos - [BAS]",
    "name": "MITS Altair 8800 - Demos - [BAS]",
    "altNames": [
        "MITS Altair 8800"
    ]
}
tosec MITS Altair 8800 - Demos - [BIN]
{
    "id": "MITS Altair 8800 - Demos - [BIN]",
    "name": "MITS Altair 8800 - Demos - [BIN]",
    "altNames": [
        "MITS Altair 8800"
    ]
}
tosec MITS Altair 8800 - Firmware
{
    "id": "MITS Altair 8800 - Firmware",
    "name": "MITS Altair 8800 - Firmware",
    "altNames": [
        "MITS Altair 8800"
    ]
}
tosec MITS Altair 8800 - Games - [BAS]
{
    "id": "MITS Altair 8800 - Games - [BAS]",
    "name": "MITS Altair 8800 - Games - [BAS]",
    "altNames": [
        "MITS Altair 8800"
    ]
}
tosec MITS Altair 8800 - Games - [BIN]
{
    "id": "MITS Altair 8800 - Games - [BIN]",
    "name": "MITS Altair 8800 - Games - [BIN]",
    "altNames": [
        "MITS Altair 8800"
    ]
}
tosec MITS Altair 8800 - Games - [ROM]
{
    "id": "MITS Altair 8800 - Games - [ROM]",
    "name": "MITS Altair 8800 - Games - [ROM]",
    "altNames": [
        "MITS Altair 8800"
    ]
}
tosec MITS Altair 8800 - Various - [BIN]
{
    "id": "MITS Altair 8800 - Various - [BIN]",
    "name": "MITS Altair 8800 - Various - [BIN]",
    "altNames": [
        "MITS Altair 8800"
    ]
}
tosec MITS Altair 8800 - Various - [DSK]
{
    "id": "MITS Altair 8800 - Various - [DSK]",
    "name": "MITS Altair 8800 - Various - [DSK]",
    "altNames": [
        "MITS Altair 8800"
    ]
}
tosec MITS Altair 8800 - Various - [HEX]
{
    "id": "MITS Altair 8800 - Various - [HEX]",
    "name": "MITS Altair 8800 - Various - [HEX]",
    "altNames": [
        "MITS Altair 8800"
    ]
}
oldcomputers 62
{
    "type_id": 1,
    "id": 62,
    "pages": {
        "photos": "photos.asp?t=1&c=62&st=1",
        "adverts": "photos.asp?t=2&c=62&st=1",
        "hardware": "hardware.asp?t=1&c=62&st=1",
        "emulators": "emulator.asp?c=62&st=1",
        "links": "links.asp?c=62&st=1",
        "docs": "docs.asp?c=62&st=1",
        "videos": "videos.asp?c=62&st=1",
        "comments": "forum.asp?c=62&st=1"
    },
    "image": "https://www.old-computers.com/museum/photos/mits_altair-8800_2.jpg",
    "company_link": "company.asp?st=1&m=82",
    "company_name": "MITS",
    "company_logo": "https://www.old-computers.com/museum/logos/mits_logo.gif",
    "description": "This computer was one of the first \"home\" computers ever made, it was sold as a kit, but for additional money, you could buy one fully assembled.\nIt had no keyboard, the \"program\" had to be entered with the switches located on the front panel of the \"computer\", and as it didn't have video output (yet), the result was displayed via LEDs.\nAnother computer which had almost the same characteristics was launched by IMSAI and was called <a href=\"computer.asp?c=389\">IMSAI 8080</a> (see both in the \"Emulators\" section). \nThe ALTAIR 8800 had one input port, also called the \"Sense Switches\" (I/O address 255) which was the left hand 8 address switches. Address 255 was also used on the IMSAI. The IMSAI front panel differed from the Altair in that you could also output to port 255 to a displayed LED buffer above the sense switches - a feature the Altair did not have (it only had input).  The Altair sense switch were used during boot into Altair DOS to specify the terminal port to the DOS.\nMITS made several peripherals and cards for this computer, namely, a video card, a serial card to connect a terminal, a RAM expansion card and a 8\" floppy drive that used hard sectored floppies and stored 300 KB.\nSeveral models were launched, they had the same characteristics except the CPU (8080 and later 8080A).\nBelieve it or not, the name \"Altair\" comes from Star Trek! The young daughter of the 'Popular Electronics' magazine editor gave it the name of the destination planet of the Enterprise from the episode she was watching.\n<a href=\"doc.asp?c=62\"><img src=\"graphs/readmore.gif\" border=\"0\" vspace=\"4\"></a>",
    "name": "ALTAIR 8800",
    "manufacturer": "MITS",
    "type": "Professional Computer",
    "origin": "U.S.A.",
    "year": "1975",
    "keyboard": "No keyboard, but switches on front panel.",
    "cpu": "Intel 8080A (rarely 8080)",
    "speed": "2 MHz (each instruction takes 4 clock cycles)",
    "ram": "256 bytes (you had to buy this memory board)",
    "rom": "None",
    "text_modes": "None (optional 64 x 12 card)",
    "graphic_modes": "None",
    "size_weight": "Unknown",
    "io_ports": "Unknown",
    "power_supply": "Unknown",
    "price": "$595",
    "photos": [
        {
            "name": "Large view ",
            "image": "https://www.old-computers.com/museum/photos/Altair_8800_System_s1.jpg",
            "description": ""
        },
        {
            "name": "Front panel #1 ",
            "image": "https://www.old-computers.com/museum/photos/Altair_8800b_Fpanel_1.jpg",
            "description": ""
        },
        {
            "name": "Front panel #2 ",
            "image": "https://www.old-computers.com/museum/photos/Altair_8800b_Fpanel_2.jpg",
            "description": ""
        },
        {
            "name": "Top view ",
            "image": "https://www.old-computers.com/museum/photos/Altair_8800b_Top_1.jpg",
            "description": ""
        },
        {
            "name": "Inside ",
            "image": "https://www.old-computers.com/museum/photos/Altair_8800b_Inside_1.jpg",
            "description": "Note that the back plane didn't receive all of its S-100 connectors.\r\nOnly the CPU board is inserted. \r\n \r\n\r\n\r\n"
        },
        {
            "name": "Altair peripherals ",
            "image": "https://www.old-computers.com/museum/photos/Altair_8800_Peripherals_1.jpg",
            "description": "Various peripherals including a paper tape reader and 8'' floppy drive units"
        },
        {
            "name": "The Tarbell Cassette... ",
            "image": "https://www.old-computers.com/museum/photos/tarbell_k7.jpg",
            "description": "This interface can be used with IMSAI or ALTAIR. It transfers from 187 to 540 bytes / second"
        },
        {
            "name": "Bill Gates ",
            "image": "https://www.old-computers.com/museum/photos/Altair_8800_BillGates_1.jpg",
            "description": "Bill Gate giving a demonstration of its first BASIC interpreter, written for the Altair 8800."
        },
        {
            "name": "Program example ",
            "image": "https://www.old-computers.com/museum/photos/Altair_8800_ProgSample_1.jpg",
            "description": "An example of assembly program user could enter using sense switches.<p class=\"petitgris\">Thanks to <b>Mark Thompson</b></p>"
        },
        {
            "name": "Paper tapes ",
            "image": "https://www.old-computers.com/museum/photos/Altair_8800_PaperTapes_1.jpg",
            "description": "Original Altair paper tape programs. This Assembler package consisted of a <b>Monitor</b>, an <b>Editor</b>, an <b>Assembler</b> and a <b>Debugger</b>.<p class=\"petitgris\">Thanks to <b>Mark Thompson</b> </p>"
        }
    ],
    "adverts": [
        {
            "image": "https://www.old-computers.com/museum/adverts/Altair_8800_Advert_1.jpg",
            "name": "First advert"
        },
        {
            "image": "https://www.old-computers.com/museum/adverts/Altair_8800_FranklinAd_1.jpg",
            "name": "Advert #2"
        },
        {
            "image": "https://www.old-computers.com/museum/adverts/Altair_8800_PopularElectronics_1.jpg",
            "name": "Popular Electronics"
        },
        {
            "image": "https://www.old-computers.com/museum/adverts/Altair_8800_Bag_1.jpg",
            "name": "Show bag"
        },
        {
            "image": "https://www.old-computers.com/museum/adverts/Altair_8800_PriceList_1.jpg",
            "name": "1976 price list"
        },
        {
            "image": "https://www.old-computers.com/museum/adverts/Altair_8800_XmasCatalog_1.jpg",
            "name": "1976 Xmas catalog"
        },
        {
            "image": "https://www.old-computers.com/museum/adverts/Altair_8800_Brochure_1.jpg",
            "name": "MITS brochure #1"
        },
        {
            "image": "https://www.old-computers.com/museum/adverts/Altair_8800_SaleBrochure_s1.jpg",
            "name": "MITS brochure #2"
        },
        {
            "image": "https://www.old-computers.com/museum/adverts/Altair_8800_Course_1.jpg",
            "name": "Altair 'mobile' cour..."
        },
        {
            "image": "https://www.old-computers.com/museum/adverts/Altair_8800_CompNotes_1.jpg",
            "name": "Computer Notes"
        },
        {
            "image": "https://www.old-computers.com/museum/adverts/Altair_8800_CompNotes_2.jpg",
            "name": "Altair Convention"
        },
        {
            "image": "https://www.old-computers.com/museum/adverts/Altair_8800_BitShopper_1.jpg",
            "name": "Bit Shopper"
        },
        {
            "image": "https://www.old-computers.com/museum/adverts/MITS_Altair_pub-creative-compuetug sept1975.JPG",
            "name": "Early advert (septem..."
        },
        {
            "image": "https://www.old-computers.com/museum/adverts/MITS_Altair_pub-creative-computing-sept1975_2.JPG",
            "name": "Early advert (septem..."
        },
        {
            "image": "https://www.old-computers.com/museum/adverts/MITS_Altair_pub-creative-computing-nov1975.JPG",
            "name": "Early advert (novemb..."
        }
    ],
    "hardware": [
        {
            "name": "Floppy Disk System",
            "image": "https://www.old-computers.com/museum/hardware/Altair_8800_FD_1.jpg",
            "description": "Advert (March 1977) said:\n<br><br>\n\"The North Star Micro-Disk System uses the Shugart minifloppy disc drive. The controller is an S-100 compatible PC board with on-board PROM for bootstrap load. It can control up to three drives. With the PROM bootstrap, we provide our powerful extended Basic (10 Kb) with sequential and random disk file accessing.<br>\nEach 5.25'' diskette has 90k data byte capacity. Basic loads in less than 2 seconds.\n<br><br>\nMicro-Disk system (kit) <b>$699</b><br>\nMicro-Disk system (Assembled) <b>$799</b><br>\nAdditional drive  <b>$425</b><br>\nDiskette  <b>$4.5</b>\" "
        },
        {
            "name": "CPU card",
            "image": "https://www.old-computers.com/museum/hardware/Altair_8800_Card_CPU_1.jpg",
            "description": ""
        },
        {
            "name": "1 KB Static RAM",
            "image": "https://www.old-computers.com/museum/hardware/Altair_8800_Card_1Kstatic_1.jpg",
            "description": ""
        },
        {
            "name": "4 KB Dynamic RAM",
            "image": "https://www.old-computers.com/museum/hardware/Altair_8800_Card_4Kdram_1.jpg",
            "description": ""
        },
        {
            "name": "Serial I/O card",
            "image": "https://www.old-computers.com/museum/hardware/Altair_8800_Card_SerialIO_1.jpg",
            "description": ""
        },
        {
            "name": "Test card",
            "image": "https://www.old-computers.com/museum/hardware/Altair_8800_TestConnectorBoard.jpg",
            "description": "Tis card was used to test each contact of a S-100 connector"
        },
        {
            "name": "advert dated September 1976",
            "image": "https://www.old-computers.com/museum/hardware/cromenco_extensions_s100_advert.jpg",
            "description": "- PROM board<br>\n- TV Dazzler video card<br>\n- Analog I/O board<br>\n- Cyclop optical digitalizer"
        },
        {
            "name": "US Advert (1977)",
            "image": "https://www.old-computers.com/museum/hardware/Cromenco-joysticks_ad_1-1977.JPG",
            "description": "You could use these joysticks with the Altair or any S100 bus system. They connect to the Cromenco D+7/A I/O board and were meant to play the games available for the Cromenco TV Dazzler, the first video card for personal computer."
        },
        {
            "name": "Advert (November 1976)",
            "image": "https://www.old-computers.com/museum/hardware/cromenco_tv-dazzler_advert_1976.jpg",
            "description": ""
        }
    ],
    "emulators": [
        {
            "name": "SIMH",
            "url": "http://simh.trailing-edge.com/",
            "platform": "Windows",
            "description": "Windows emulator for a lot of mini computers. Sources are available so you can compile them for your own platform."
        },
        {
            "name": "Altair and IMSAI Emulators",
            "url": "http://www.threedee.com/jcm/emu8080/index.html",
            "platform": "Other platform",
            "description": "A list of Altair / IMSAI emulators"
        }
    ],
    "links": [
        {
            "url": "computer.asp?st=1&c=389",
            "name": "IMSAI - 8080",
            "description": "1974 - 1976 Altair 8800 Brochures and Price Lists "
        },
        {
            "url": "http://altair.ftldesign.com/",
            "name": "Altair 8800 brochures",
            "description": "Altair page"
        },
        {
            "url": "http://www.eingang.org/Lecture/altair.html",
            "name": "Computers : from the past to present",
            "description": "Infos about MITS/Pertec Altair 8800/680b/MITS 300/Attache systems"
        },
        {
            "url": "http://www.virtualaltair.com/",
            "name": "The Virtual Altair Museum"
        }
    ]
}
emutopia 310
{
    "id": 310,
    "name": "Altair 8800",
    "shortName": "altair-8800",
    "url": "https://emutopia.com/index.php/emulators/category-items/3-emulators/310-altair-8800",
    "type": "Computers",
    "emulators": [
        134
    ]
}