Intel iSBC 80/24 System
This is a new page covering the iSBC 80/24 Single Board Computer (SBC).
This board was introduced in 1985? provide OEMs with an SBC to begin building
systems and applications using the 8085 processor. It was used with additional
boards from Intel to expand memory and I/O capabilities.
iSBC-80/24 Single Board Computers:
iSBC 80/24A Single Board Computer Hardware Reference Manual May 85 148437-001
Additional boards to make a complete system:
iSBC 32/48/64K RAM Board Hardware Reference Manual Jan 79 9800488B
iSBC 202 Double-Density Floppy Disk Controller Hardware Reference Manual 77 9800420A
iSBC 208 FM/MFM Double-/Single-Density Floppy Disk Controller Hardware Reference Manual 77 143078-001
iSBC 464 32KB ROM Board Hardware Reference Manual 81 9800643B
Monitor Source Code
Mon80p Ver 1.1 for iSBC 80/10 [1 Nov 1976]
iSBC 930 Monitor (MON830) for iSBC 80/30 Manual [24 Apr 78]
Port of iSBC 930 Monitor for iSBC 80/30 with Modified Commands 
These Intel SBCs would not run the Intel MDS OS nor the ISIS-II OS. It would require
special versions of these to run modified for the I/O port assignments. This board
has a modification to disable the onboard ROM and RAM. The ROM maps at address 0H which has
to be RAM for any of the OSs to operate. The RAM has to be disabled because it overlays
external RAM, and the external RAM is the only RAM available for DMA operations from the
disk controller boards.
This board had a version of CP/M-80 ported to it utilizing an iSBX-218A Floppy Disk
Controller. I have yet to get this version of CP/M to boot in this configuration.
Here is what I have done so far:
CP/M-80 V2.2 Source for Intel System 80/24
Last updated: 20 November 2017