Search Posts:

IBM DOS 3.30 on a Commodore BX700 CBM-II

SHARE

Return to Threads

  IBM DOS 3.30 on a Commodore BX700 CBM-II by Bill Degnan - 12/01/2017 14:35
This stack of IEEE drives was used during testing of Michal Pleban's port of IBM DOS 3.30 to the CBM-II. Michal has a GITHUB page that explains how it works in detail but in short he created a PC compatibility layer that functions between the 8088 co-processor card on the CBM-II and the 6509 CPU on the main board. Click image for larger view.


I used a Zoom Floppy with an IEEE adapter added to build the disks using CBM Transfer. This was tricky, the software does not work perfectly. I was able to write the D82 image to 8050 drive, the D80 image did not transfer correctly. Click image for larger view.


A closeup of the boot screen. Click image for larger view.


The CBM BX700 booting IBM DOS 3.30. The little black circle on the keyboard is one of the keyboard's rubber feet, which fell off. It's not part of the keyboard. Click image for larger view.


Commodore sold very few CBM-II computers before cancelling the entire line altogether. They initially announced an 8088 co-processor card option for this computer, but very little commercial software was actually created for it other than by Handic. Internally Commodore played around with a port of IBM 1.25 DOS but it was not finished. Just for fun, Michal created an IBM 3.30 port to see if it could be done. My testing of the port revealed a lot of what Michal found, there are too many incompatibilities to make the port practical so far, but the work continues...

IBM DOS 3.30 for CBM=II with 8088 co-processor can be downloaded in D80 / D82 disk image format here. (Link to local copies and the GITHUB repository.

Reply

Resources:


Buy a Commodore Computer Poster

Popular Topics and FAQs


  • Commodore B Series Tips and Tricks
  • Aerocomp TRS 80 M 1 Expansion Unit DDC
  • Items Wanted
  • Lobo Max 80
  • Zenith Z-19-CN
  • Prototype PET 2001 photo
  • Using Toggle Switches to Analyze Memory
  • Commodore Disk Archive Project
  • PET 2001 Prototype at Gametronics 1977
  • Jim Butterfield Photo
  • IMSAI 8080 With Processor Tech. Cutter
  • Secrecy is the keystone of all tyranny
  • Cromemco System Three
  • Northstar Horizon - Boot Problem
  • Computer History and Restoration Links
  • Commodore BX-256-80 - 8088 Co-processor
  • S-100 board testing with Z-80 ICE
  • Donner 3500 - an early portable computer
  • Digital (DEC) PDP 11/05 NC Assembly
  • Univac 1219 rescue
  • IMSAI 1.4 BASIC vs. MITS 8K BASIC
  • Fido BBS listing node list 6-13-1986
  • PDP 8e
  • MITS 88-2 SIO (2SIO) for BASIC
  • Visual Technology Inc Model 1050
  • Amiga 2500 Restoration
  • The Evolution Of IBM Computers
  • Replacement teletype print hammer head
  • Archiving and Copying Software 101
  • Computers Built 1940 - 1950
  • CBM B-520 (a.k.a B256-80 or B500 256)
  • RCA COSMAC Microkit
  • Commodore 64K C-116 Mods
  • MITS 8800b Turnmon 9600 baud
  • Catweasel, 8in and 5 1/4
  • Raspberry Pi as Gateway to Internet
  • Digital PDP11 late 1969 early 1970
  • PDP 11/40 72 inch cabinet model
  • PDP 11/40 Industrial 11 model
  • Digitial MicroVAX 3100 30 System
  • Digital VAX 4000-200
  • Commodore 64 / 1541 DRIVEKNOCK
  • Booting the System Using RL02 drive
  • PACS: Reflections by Kathleen Mauchly
  • Tele-Graphic Computer Systems Inc.
  • Commodore B Series SID Jukebox?
  • Installing Core into PDP 11/40
  • Setting Up OpenVMS 7.1 DNS CLERK
  • Felt-Tarrant Comptometer Model J
  • NextStation Color
  • Digital Rainbow (PC100-B2)
  • 1970 Compusad Compulogical Tutor
  • Archiving Papertapes Using DSI NC 2400
  • 1976 P.C.C. Features the MAI JOLT 6502
  • 1961 Beckman DEXTIR Computer
  • UNIVAC 1 and UNIVAC File Computer 1
  • Past Issues:


    Lanier Model 103 frontleft

    This image was selected at random from the archive. Click image for more photos and files from this set.