Octagon 4010, User Manual

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Appendix B – 105
W4: Interrupt Select
Pins Jumpered Bus IRQ CPU IRQ
[1-2] IRQ4 IRQ11
[3-4]* IRQ4 IRQ4
[5-6] IRQ3 IRQ10
[7-8]* IRQ3 IRQ3
* = default
The 4010 also supports any operating system which requires the
standard AT IDE disk device interrupt (IRQ14). This includes
QNX, Novell, Windows and others.
Disabling Interrupts
The PC Bus does not allow shared interrupts on the bus. You can,
however, disable the COM1 and COM2 interrupts (IRQ4 and
IRQ3) to allow for other devices which use these interrupts. If
COM1 is the console, its interrupt (IRQ4) is in use. COM2 (IRQ3)
is not used by the BIOS. To disable interrupts for COM1, write a 0
to 3FC bit 3. To disable COM2, write a 0 to 2FC bit 3.
USING MICROSOFT WINDOWS 3.1
If you are using Microsoft DOS on the 4010, Microsoft Windows 3.1
is fully compatible and operates in Standard Mode only. Enhanced
Mode is not supported due to the limitations of the processor chip.
However, if you are using ROM–DOS 5.0 and Microsoft Windows
on the 4010, there are some limitations:
• The Windows installation program may modify the
AUTOEXEC.BAT and CONFIG.SYS files to include the
SMARTDRV.EXE file:
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