Included tags: Disk controller ×
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IWM reverse engineering

Apple Fritter about 2 months ago

After probing the waters in this thread: https://www.applef... finally got enough motivation to proceed with reverse engineering the IWM myself. I'm well aware that other have done that long ago, …

How important are the IWM features for the Apple IIc ?

Apple Fritter about 3 months ago

Hi Fans - as you might know, I'm working on my Replica 2e project which aims to produce a substitute for all Apple II from the early ones to the Apple IIe and the Apple IIc without using any of Apple's proprietary custom ICs, like the MMU, IOU and  the I …

ST11R in an IBM 5170

VCFed about 3 months ago

Hi -- When I attempt to use my ST11R RLL controller card in my IBM 5170, during POST the card appears "Seagate ST11 BIOS Revision 2.0.0".... then "This bios is not compatible with the system bios." It will hang there for a couple minu …

Troubleshooting disk drive issue

Apple Fritter about 3 months ago

I have an Apple IIe that has stopped reading disks.  I was loading various disks that I had lying around to see what was on them and the system just stopped loading anything off the disk drive (duodisk).   Here is the steps I have taken so far:I examine …

Floppy Disk Controller Cartridge help ?

VCFed about 4 months ago

I have this device that works.. v1.1 Disk extended basic cartridge for Tandy Coco computers I would like to know if anyone knows if there is a 3d printer STL to make a cartridge box for it. ? thanks Patrick …
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Exidy Sorcerer Floppy Disk Controller (Dreamdisk) Replica PCB

VCFed about 4 months ago

We have successfully designed, built and tested a replica of the Sorcerer Dreamdisk FDC here in Australia. It based around a WD2793 FDC chip. It booted successfully from a Gotek using an 80 Track DS/DD 720K .DSK Image. The DreamBIOS CPM 2.2 uses ZCPR 1.6 …

Seattle Computer Products 8086 S-100 System (Complete)

VCFed about 4 months ago

Complete Seattle Computer Products 8086 S-100 system (see link for pics): S-100 Cards (Manufacturer: all cards made by Seattle Computer Products, verified original by Tim Patterson) - SCP-210 CPU Board (Intel 8086 based) - SCP-301 CPU Support Board - SCP- …
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Uncle Bernie's "Replica 2e" (WW Prototype of an Apple IIe replica)

Apple Fritter about 4 months ago

Here is a first photo of my brand new "creature", which "came alive" this morning:  PDRM4505B.jpg  It's the wire wrapped prototype of an Apple IIe Replica (not a "clone" !) based on my IOU/MMU PLD substitutes which were al …

Newbie with an XT - Options for displaying CGA

VCFed about 4 months ago

Hello everyone! I'm new to this community and, though I grew up with MS DOS and the x86 family, I have a limited knowledge about computer hardware (something I hope to correct with my new-found hobby). I recently bought this beauty of a computer: an XT s …

Chicken vs. Egg - getting files on a CP/M machine

VCFed about 5 months ago

I'm putting together an S-100 CP/M machine that consists of a CPU board, a memory board, a dual CF disk storage board, and a keyboard, mouse, and display board. There is no disk controller card,and the CPU Monitor program is setup to use a serial interface …
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Monarch MP/M-II for Dynabyte computers...

VCFed about 5 months ago

Here's a complete distribution of Monarch MP/M-II for Dynabyte S-100 machines. I don't know what the actual disk controller/console controller requirements are: ... Monarch MP/M II Re …

8-bit acorn hardware • Failed model B - empty data bus.

Stardot about 5 months ago

Hi All,I'm gradually working my way through the possible causes of a dead model B and I would appreciate the wisdom of the forum at this point.Story so far, I got hold of an issue7 model B a couple of months back, all working when I got it, RIFA capacitor …

Wanted: DPT SmartCache PM3011 series

VCFed about 5 months ago

Hello, I'm looking to purchase a Distributed Processing Technology (DPT) SmartCache PM3011 series disk controller card. Specifically, I am looking for the PM3011E/559 (MFM) or PM3011E/659 (RLL), which have onboard SCSI hosts. There are some PM3011E/75s on …

Priam Drives

VCFed about 5 months ago

I was given a Priam 7050-10 8" drive yesterday and I've spent some time looking over the manual over in bitsavers. - http://www.bitsavers.org/pd... what I can tell it's a rather early embedded servo voice coil drive tha …

8-bit acorn hardware • ADFS not appearing in *HELP

Stardot about 6 months ago

Hi All,I'm trying to get ADFS working on a Model B to use in conjunction with a 1MHz Pi adapter to emulate a SCSI Hard Disk. The machine is fitted with a 8271 Disk Controller which works fine with a Gotek, and an IFEL 128k FLASH ROM board which has been w …

Floppy disk controller board for Xerox 820-II

VCFed about 6 months ago

I have a machine with the SASI host adapter but no hard drive unit and would like to replace it with an FDC so I can use it as a floppy based system. Thanks! Would be interested in other parts for it as well (keyboard, drives, etc.) Please contact me at …

Long shot question for the emulator fans and writers please...

VCFed about 6 months ago

I have been writing a PDP11 emulator from scratch, to run on an ESP 32 and yes, I know there are others out there - I wanted to try it out for myself, not working from anyone else's code base.. It is targeting the 11/23 feature set, with EIS and MMU, 1MB …

Sharp PC-6340: XTIDE not loaded from ROM

VCFed about 6 months ago

Hello everyone I've got a Sharp laptop (acquired allegedly brand new unopened several years ago). I've powered it up and it's got multiple technical issues which are in process of solving or were solved. However, this one issue is troubling me most, it do …

Apple ii plus boots to Apple ii screen but won’t load disks

Apple Fritter about 6 months ago

Hello group,I have an Apple ii plus that boots to an Apple II screen and cursor but when I try to load and disks I get garbage on the screen. It will execute a small basic program I type in fine. I know one of the 6 ROMs is bad so I’m booting it off a RO …

Poly CPU and disk boards price

VCFed about 6 months ago

I would like to get my 8813 up and running again but haven't seen a CPU board and disk controller come up in a long time. Today a couple came up but they're in the hands of vintagecomputermuseum for $245 and $200 respectively and I'm wondering if that's r …

Apple II (Not Plus) Board has Issues

Apple Fritter about 7 months ago

Recently got a Rev.2 Apple II board.  Originally had AppleSoft ROMs, But the AutoStart had a bad pin (broke off) so I replaced them with an Integer set I had on a II+ board.  The board boots to the Machine Monitor, and with a ROM switch card (AppleSoft o …

Altair CP/M without a disk controller

VCFed about 7 months ago

I have created a version of CP/M 2.2 for the Altair that does not require a disk controller. Instead, disk transfers are done through the second port on an 88-2SIO serial interface board and disk images are served from a PC. The server on the PC is the sam …

Fixed Disk Controller failure!

VCFed about 7 months ago

So everything was working great and then this happened. When I hit F1 to go into Setup and try to "Enable the Built-In IDE Controller," once I reboot, it goes back to Disable. TIA …

need help

VCFed about 7 months ago

Hi, I am new to this site and am a reasonably challenged but resourceful person. I am attempting to rebirth my CoCo 1 (26-3004, late model) and have found some programs to download. I downloaded these onto my desktop pc running window 10. My CoCo is has 64 …

Amstrad PC1640 - Faulty Floppy Disk Controller or Disk Drive

VCFed about 7 months ago

Hello. I'm hoping there are some resident Amstrad experts who may be able to assist. I recently acquired an Amstrad PC1640 with an 'MD' monochrome display. It starts to go through the initialisation checks but never reaches a prompt. After showing 'Please …