User guide

64 Enhanced OS-9 for X86 PCAT

Installing and Configuring Enhanced OS-9

NoteNote

The SMC 83C795 part is not yet supported.

SMC 8390

System State Debugging - Not Supported

Default Settings

PORTADDR0x00000300/* Base address of hardware */

VECTOR 0x4a /* Port vector */

CPU_BASE 0xcc000 /* CPU BASE */

RAM_SIZE 0x4000 /* RAM Size */

Solving Configuration Issues

Connection Type

On the SMC 8390 the hardware connection type is setup in hardware

on the board. Refer to the SMC 83C70 documentation that came with

the card used.

Interrupt Conflict

Another problem may be the interrupt used. The default interrupt is

IRQ10. In this case you have the following options.

Resolve the conflict by moving the device using IRQ10.

3. Choose a interrupt that matches the system configuration such as

IRQ15 (0x4f). In this case the OS-9 device descriptor must be

changed. In this case the board jumpers must be changed to set the

interrupt to be used.

4. If an interrupt conflict exists the device will either not work at all or

will hang when the conflicting device is accessed. Mapping the

interrupts used in the system is recommended.