I/O Channel SlotsThe 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 toshare the system’s resources, including memory)• DMA channelsThe pinouts of the expansion bus I/O channels are shown as belowand on the next page.Figure 6-10: 62-Pin Expansion Bus l/O ChannelsB AChapter 6: Appendix 23
