The Harte Tec Super I/O Controller Board provided a complete I/O subsystem for the IEEE-696 bus. The board supported 8-bit address decoding for compatibility with the original IMSAI 8080 and other S-100 bus systems as well as enhanced 16-bit address decoding supported by IEEE-969 systems. The board also supported DMA for floppy disk access via an on-board DMA controller. The Super-I/O controller did not however support the IEEE-696 Temporary Master Access (TMA) requirements.

The Super I/O Controller provides the following features:-
Standard Microsystems Corporation (SMsC) FDC37C935APM Super I/O Controller.
Support for two Floppy Diskette drives, in any combination:
3.5-inch 2.88MB, 1.44MB, 720KB.
5.25-inch 1.2MB, 360KB, DS/HD, DS/DD, SS/DD, SS/SD.
8-inch Single or Double-Density.
Two NS16550-compatible UARTS.
One IEEE-1284-compatible parallel port.
PS/2-compatible keyboard/mouse controller.
Two independent IDE channels supporting up to two IDE devices each.
Battery backed real-time clock/calendar with non-volatile RAM.
128KB FLASH memory with banked memory support and a selectable window size.

This amazing board had only one disadvantage and that was the I/O address range was fixed (and was large). The table below shows the relevant ports.

This page was last modified on 09/22/2011