Intel MDS-II Systems

A horizontal ribbon.

This is a new page covering the Intel MDS-II System.

This System was introduced in 1978 provide a Microprocessor Development System for the 8080 and later 8085 processors.

Technical References

Intellec MDS-II Hardware Reference Manual Mar 82 9800556B

A horizontal ribbon.

Restoration of an MDS-225 system

I restored a system based on just the IPC board from an MDS-II as described below:

Restoration of an MDS-225 system [16 Oct 16]

I have received an IOC board for the MDS-II. I have not connected it to the system to test it.

Monitor Source Code

Introduced in 1978. This system used Intel 8080 and 8085 processors. It was a multibus I system. The Intel Model 210, 220, 230, and Expansion Chassis were introduced. These systems used ROM-, Paper Tape-, or Disk-based programs to do Intel processor development.

Mon80 Ver 1.1 for MDS II [5 May 1977]
Mon80 Ver 1.2 for MDS II [4 Jan 1978]
MDS Series II Boot/Monitor Version 1.2 Manual [4 Jan 78] 9800605A
Mon80 Ver 1.3 for MDS II [1 Mar 1979]
MDS Series II MDS Boot/Monitor Version 1.3 Manual [1 Mar 79] 9800605B

This is a new monitor for the MDS-225 IPC Board which adds more functionality and removes all the code to support the IOC board. This has been extensively tested on the MDS-225 CPU board.

My Mon80 Ver 1.0 for MDS II [15 Jul 2015]

Intel Systems Implementation Supervisor II (ISIS-II)

Introduced in 1978. This was Intels home grown Operating System. It ran from Single Density or Double Density 8-inch Floppy Disks. The SD was IBM 3740 format, but the DD was encoded as M2FM, which was not IBM 34 compatible. This requires operational MDS or special tools and systems to read these 8-inch disks. This OS ran on the MDS-800/MDS-I and MDS-II systems.

Here is a link to the archive of ISIS-II Operating Systems and Common User Support Programs (CUSPs).

ISIS-II and CUSPs for ISIS-II

Here is a link to the archive of ISIS-II Operating Systems and Common User Support Programs (CUSPs) disassemblies.

ISIS-II and CUSPs for ISIS-II Disassemblies

A horizontal ribbon.

Last updated: 22 November 2017