Table of Contents
Advertisement
VGA Video Controller
SCSI Controller
Appendix B
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
I/O, Memory, and IRQ Details
This appendix provides more detailed technical descriptions of the
following for the VXI Pentium Controller:
•
VGA video controller, including its BIOS extension
•
SCSI controller, including its BIOS extension
•
Ethernet controller
•
Memory map
•
IRQs (interrupts)
The VXI Pentium Controller contains a PCI-based, super-VGA compatible
video graphics controller with 2 MB of display memory. The VGA video
controller resides on the PCIbus and is PCI device number 1.
The Video BIOS extension is shadowed and write-protected in the region
0x0C0000 to 0x0C7FFF (32 KB) on any system reset or power-up. The
features of the Video BIOS include:
•
Standard VGA modes up to 640 X 480 resolution with 16.8 million
colors.
•
Super-VGA modes up to 800 X 600 resolution with 16.8 million
colors.
•
Extended video modes up to 1280 X 1024 resolution with 256 colors
(non-interlaced).
The SCSI BIOS extension is automatically shadowed in system DRAM at
memory location 0x0C8000 to 0x0CFFFF.
The SCSI device resides on the PCIbus and is mapped as PCI device number
3. The SCSI controller uses PCIbus interrupt INTC. The default I/O base
address and interrupt is 0xC180 and IRQ11, respectively.
Appendix B
I/O, Memory, and IRQ Details
51
Advertisement
Table of Contents
