Digital Equipment AXPpci 33, Design Manual

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Frequently Asked Questions
Sections 2.2.2.17 and A.2 provide information about main memory.
The AXPpci 33 accepts industry-standard 70 ns, 36-bit SIMMs. 32- or
33-bit SIMMs will not work.
• What is the proper disk size?
A 1 GB disk drive (minimum) is recommended for the Digital UNIX
operating system.
• What are the required disk types?
A Digital UNIX disk must be a SCSI disk.
• What are the available interrupt DMA and address spaces?
The following applies to ISA interrupts, DMA channels, and I/O
address space:
— 16 ISA interrupts: 0–15.
Interrupts 0, 2, 8, and 13 are not available for use by ISA options.
— 8 DMA channels: 0–7.
DMA channel 2 is reserved for floppy.
DMA channel 4 is not available for use by ISA options.
— 3 GB of I/O address space.
The SRM console has provisions for examining and displaying the
hardware configuration. This is useful for troubleshooting.
G–4