Specifications

EPC-8 Hardware Reference

3 3

3-16

When using EXMs with configurable interrupts, DMA channels, I/O addresses, and/or

memory addresses, avoid conflicts with built-in functions of the EPC-8. Guidelines

are:

1. If an interrupt is needed, use IRQ3, IRQ5, IRQ9, IRQ12, or IRQ15.

IRQ7 can be used if the printer port is not being used. IRQ3 should not

be used if the COM2 port is being used.

2. Use DMA channels 1, 3, 6, and 7.

3. Do not select I/O addresses that conflict with those in the EPC-8. A com-

plete list appears in Appendix A. For instance, I/O addresses in the 300-

33F range can be used.

4. If the EXM needs to use upper memory addresses, they must be in the

0C8000-0DFFFF range. Note that the E-page is used for VMEbus access

and is not available.

VME Menu

Use the options in this menu to configure the VMEbus interface and addressing.

Figure 3-10. VME Menu.

Main Advanced EXM VME Exit

Item Specific HelpRadiSys EPC-8

Arbitration Priority: [0]

Arbitration Mode: [Round Robin]

Bus Release: [RONR (VXI)]

F1 Help Select Item -/+ Change Values F9 Setup Defaults

ESC Exit Select Menu Enter Select Sub-Menu F10 Previous Values

<Tab>, <Shift-Tab>, or

<Enter> selects field.

ULA: [00]

Scan Range: [00000000-FFF00000h A32SD]

VME ROM Base Address: [D000-D3FFh]

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