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5150CAXX: That’s right – the very first IBM Personal Computer, the IBM 5150 – a business-oriented machine and a hallmark platform that started it all, shipped along with an integrated cassette port. Too bad it could only be utilized through the cassette BASIC contained in ROM… Or shall we say thankfully? Yes, this interface was abandoned soon after, for obvious reasons. But let’s fast-forward 40 years: reviving this legendary machine today, why don’t we give the cassette interface a go… in DOS?

Booting from a vinyl record: Most PCs tend to boot from a primary media storage, be it a hard disk drive, or a solid-state drive, perhaps from a network, or – if all else fails – the USB stick or the boot DVD comes to the rescue… Fun, eh? Boring! Why don’t we try to boot from a record player for a change?

BootLPT/86: The BootLPT/86 project was created to allow booting of classic and vintage x86 systems through the parallel interface using a cross-over LapLink null printer cable. Originally inspired by Martin Řehák’s ROMOS project, it is defaultly provided as a ROM image for any PC-compatible systems, and can also serve as a fallback boot option, should all the other boot options fail. The BootLPT/86 project is available as a complete source code package, currently hosted on a GitHub repository, which can be downloaded or cloned by anyone.

FDADAP floppy disk adapter: The D Bit FDADAP board is a small adapter which adapts 8“ floppy disk drives (Shugart SA800 style bus) to work with the PC 3.5”/5.25“ floppy disk cable pinout. It has 34- and 50-pin connectors which can be connected to the PC floppy controller and the 8” disk drive using simple straight-through ribbon cables (not included), and a 3.5“ style power connector for the on-board microcontroller.

FDDC DC-DC converter for 8" floppy drives: The D Bit FDDC is a DC-DC converter which boosts/negates the voltages from a PC power supply to those needed by most 8” floppy drives. It can attach to an IDE power connector on a PC's power supply that has sufficient capacity to power both the PC and an 8“ drive, or it can work stand-alone from its own dedicated ATX power supply (it has circuitry to drive the ATX “power-on” signal using a momentary pushbutton as input). The outputs are supplied via a 6-pin AMP Mate-N-Lok connector using the standard Shugart pinout. We are 1130 enthusiasts who operate this web site for other enthusiasts, to make a place where others can exchange information and memories about it.

IBM PC AT 5170 Type 3 BIOS Fix Patch and Enhancement: There are now patches created for the IBM PC/AT 5170 Type 3 BIOS that fixes several issues with the BIOS.

ISA Floppy Disk and Serial Controller: ISA Floppy Disk and Serial Controller card provides one floppy disk interface supporting up to two floppy drives, an RS-232 serial interface, and a BIOS extension ROM.

ISA OPL2 Card: ISA OPL2 Card is a sound card based on Yamaha OPL2 chip, officially known as YM3812. This card is compatible with the AdLib Music Synthesizer Card that was very popular in late 80's - early 90's.

ISA Super VGA: The ISA Super VGA card is based on the Trident TVGA9000i Super VGA controller IC. It offers excellent compatibility with the original IBM VGA, as well as a good emulation of older CGA, EGA, Hercules and MDA adapters. The ISA Super VGA card was designed to be used with the Xi 8088 Processor Board, but it also works in IBM PC/XT and their clones. is the home of what I think is the fastest 8-bit ISA storage device for PC/XT class hardware - the XT-CFv3 (currently in test) - and some other hardware projects.

Microchannel Enthusiasts Page: Common PS/2 Information: Software, Tips and Tricks for Hardware and Service.

Monotech PCs: ISA cards and associated items for upgrading or restoring vintage PCs.

ngIRCd: Internet Relay Chat Server. DOS 16-bit port for 8088 or better PC's. This is a very lazy and sloppy port of ngIRCd to 16-bit DOS using Open Watcom 1.9 and Mike Brutman's mTCP library. Port done by Mike Chambers, 2021. I've successfully tested this with well over a dozen users on an 8088-based system with 640 KB RAM. It runs pretty well at 10 MHz, and it's acceptable at 4.77 MHz. Wiki: Welcome to the Wiki pages! We are seeking to build a wiki about things related to OS/2 and eComStation.

PC DOS Retro: Information and history about PC DOS and MS-DOS, DOS utilities and stuff, IBM PC BIOS source code reconstruction, Related specs and information.

PS/2 Reference Manuals

Retro Computers: PS/1 and PS2 documentation and software.

Software Library: MS-DOS Games: ( Software for MS-DOS machines that represent entertainment and games. The collection includes action, strategy, adventure and other unique genres of game and entertainment software.

XT-CF-Lite V4: XT-CF-Lite V4 is a remake of James Pearce's XT-CF-Lite card, which in its turn is a simplified version of his CPLD based XT-CF card, and shares some ideas with XT-IDE card. This card allows connecting a Compact Flash (CF) card to computers with ISA bus and using it as a mass storage device. The card also supports BIOS extension ROM.

XT-IDE Information: The XT-IDE is an 8 bit ISA adapter for attaching modern(ish) hard drives, DOMs, and CompactFlash to the ISA bus. When paired with the XT-IDE Universal BIOS, it allows IBM PC compatibles to boot from IDE drives otherwise not supported.

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hardware/ibm.txt · Last modified: 2021/10/27 22:46 by system