Operating Systems

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I am working on an archive of all the software I hold for the Intel processors. It will take some time before it is on the site.

Intel Systems Implementation Supervisor for the MDS Series II (ISIS-II) was developed by Intel to support their Microprocessor Development Systems. This entire operating system was written in PLM80.

Mark Ogden continues to do a great deal of work reverse engineering the object code for ISIS-II OSs and CUSPs. Mark's makefiles are VERY complex. His work is archived on GitHub. This work is Copyright (c) 2012 by Mark Ogden, Released into the public domain for academic historic interest only and not for commercial gain.

The archive files here contain the disk image in IMG format and in DMK or IMD format, if available. IMG format is a linear copy of the disk image as produced by Unix DD. The DMK and IMD formats contain information to produce an actual disk with the right tools. The archive also contains an archive of the files found on the disk. In addition, the archive contains an ASCII file of the disk label and the manual(s) referencing the disk software.

Intel ISIS-II Disk Formats

This link describes the two disk formats used by ISIS-II for floppy disks.

ISIS-II Version 2.2

This version was released in 1976.

This version of ISIS-II would work with the iSBC 201 and iSBC 202 floppy disk controllers.

ISIS-II Version 3.4

This version was released in 1978.

This version of ISIS-II would work with the iSBC 201 and iSBC 202 floppy disk controllers.

ISIS-II Version 4.0

This version was released in 1979. The disk archive can be downloaded here.

This version of ISIS-II would work with the iSBC 201 and iSBC 202 floppy disk controllers and the iSBC 206 hard disk controllers. I have this OS working on an MDS-I (MDS-800) and an MDS-II (MDS-225).

ISIS-II Version 4.1

This version was released in 1980. The disk archive can be downloaded here.

This version of ISIS-II would work with the iSBC 201 and iSBC 202 floppy disk controllers and the iSBC 206 hard disk controllers. I have this OS working on an MDS-I (MDS-800) and an MDS-II (MDS-225).

ISIS-II Version 4.2

This version was released in 1981. The disk archive can be downloaded here.

This version of ISIS-II would work with the iSBC 201 and iSBC 202 floppy disk controllers and the iSBC 206 hard disk controllers. I have this OS working on an MDS-I (MDS-800) and an MDS-II (MDS-225).

ISIS-II Version 4.2(W)

This version was released in 1982. The disk archive can be downloaded here.

This version of ISIS-II would work with the iSBC 201 and iSBC 202 floppy disk controllers and the iSBC 215 Winchester Controller and Winchester Hard Disk Drives (ST-412/ST-506). I have this OS working on an MDS-I (MDS-800) and an MDS-II (MDS-225).

ISIS-II Version 4.3

This version was released in 1982. The disk archive can be downloaded here.

This version of ISIS-II would work with the iSBC 201 and iSBC 202 floppy disk controllers and the 206 hard disk controllers. I have this OS working on an MDS-I (MDS-800) and an MDS-II (MDS-225). This is covered on the restoration page for the MDS-225.

ISIS-II Version 4.3(W)

This version was released in 1982. The disk archive can be downloaded here.

This version of ISIS-II would work with the iSBC 201 and iSBC 202 floppy disk controllers and the iSBC 215 Winchester Controller and Winchester Hard Disk Drives (ST-412/ST-506). I have this OS working on an MDS-I (MDS-800) and an MDS-II (MDS-225).

ISIS-II Version 4.3WSI

This version was released in 1982. The disk archive can be downloaded here.

This version of ISIS-II would work with the iSBC 201 and iSBC 202 floppy disk controllers and the OMTI SASI/SCSI winchester disk controllers.

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CP/M-80

I have been working with CP/M-80 since 1978. Early on, I disassembled the object code and have used the source code for building new sized CP/M-80 systems. I have used the source for porting CP/M-80 to some of the old systems.

I first used this Operating System in 1978 on my first S-100 computer. That machine is still operational.

The first old system I brought back up was an Intel System 80/10. This was made from an iSBC-80/10 CPU board, an iSBC 064 RAM board, and an iSBC 208 FDC board. The CPU board was modified to be able to disable the onboard RAM and ROM with one bit from one of the 8255 parallel ports. This modification is discussed on the iSBC 80/10 page. The ROM on the board is located at 0000h and would not allow CP/M-80 to run.

I built a monitor ROM for this modified board which copies itself into high memory and then disables the RAM/ROM on the CPU board. This modified board does boot and run the CP/M-80 below.

CP/M-80 V2.2 Source for Intel System 80/10

CP/M-86

I have been working with CP/M-86 since 1982. I have several versions of the operating system for several machines.

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iRMX-86

I have a version of iRMX-86 for the Intel MCS-86 processors.

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XENIX

I have a version of XENIX for the Intel 310 and 320 computers. I have 2 Intel 310s and one Intel 320 machine. Currently, none of them are operational beyond the Intel Monitor.

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Last Updated: 27 November 2017