I/O Channel Slots - Datatech Enterprises Apex 386SX/20 User Manual

I/O Channel Slots

The I/O channel supports:
• Refresh of system memory from channel or microprocessors
• Selection of data accesses (either 8- or 16-bit)
• Interrupts
• 24-bit memory addresses (16MB)
• I/O wait-state generation
• I/O address space hex 100 to hex 3FF
• Open-bus structure (allowing multiple micro-processors to
share the system's resources, including memory)
• DMA channels
The pinouts of the expansion bus I/O channels are shown as below
and on the next page.
Figure 6-10: 62-Pin Expansion Bus l/O Channels
B A
Chapter 6: Appendix
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