I/O Controller Asic; I/O Controller Asic Memory Map - HP 743 Service Handbook

Functional Description
Overview

I/O Controller ASIC

The Model 743 uses an I/O Controller ASIC to control the input and output of the follow-
ing:
• Audio
• Speaker
• HP Parallel
• RS-232 Port A
• AUI LAN
• SCSI
• PS/2 Ports 1 and 0
The following table lists the I/O controller memory map.
Table 2-4
Low Address
F000 0000
F008 0000
F00B E000
F00C 0000
F010 0000
F010 1000
F010 2000
F010 3000
F010 4000
F010 5000
F010 6000
F010 7000
F010 8000
F010 9000
F010 A000
F010 B000
F010 C000
F010 D000
2-10

I/O Controller ASIC Memory Map

High Address
F007 FFFF
F00B DFFF
F00B FFFF
F00F FFFF
F010 0FFF
F010 1FFF
F010 2FFF
F010 3FFF
F010 4FFF
F010 5FFF
F010 6FFF
F010 7FFF
F010 8FFF
F010 9FFF
F010 AFFF
F010 BFFF
F010 CFFF
F010 FFFF
Size
512K Main BootROM space
248K OEM/Secondary ROM space
8K X25
256K EEPROM space
4K Interrupt Registers
4K Parallel port DMA Registers
4K Parallel Interface Registers
4K Parallel Port DMA Reset
4K Audio
4K RS-232
4K SCSI
4K LAN
4K PS2
4K Real Time Clock
4K Reserved
4K Clock Configuration Registers
4K I/O ASIC Registers
12K Reserved
Description