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l/O Channel Slots
The I/O channel suppotts:
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 6-12:
62-Pin Expansion Bus l/O Channels
B
A
Chapter 6: Appendix
23
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