Register 219H - Led/Bios Port; Register 218H - Abort/Cmos Clear/Vga Enable Port - Xycom XVME-654 Manual

Register 219h – LED/BIOS Port
Table Chapter 2 -4 describes the LEDs and signals that register 219 controls.
Bit LED/Signal Result
0 FAULT 1 = Fault LED off
0 = Fault LED on
1 PASS 1 = PASS LED on
0 = PASS LED off
2 FLB_A18_EN 1 = Flash write and enable FLB_A18
3 FLB-A18 Flash bit for address A18 of Flash BIOS when FLB_A18_EN equals 1
4 Reserved 0
5 Reserved 0
6 Reserved 0
7 Reserved 0
Register 218h – Abort/CMOS Clear/VGA Enable Port
This register controls the abort toggle switch. It also allows you to read the CMOS clear
switch and VGA enable.
Bit
0 Reserved
1 Reserved
2 Reserved
3 Reserved
4 ABORT_STS
5 ABORT_CLR
6 VGA_EN
7 CLRCMOS
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Table Chapter 2 -4. LED/BIOS Port
Table Chapter 2 -5. Register 218h Settings
Signal
0
0
0
0
1 = Abort toggle switch caused interrupt
1 = Enable abort
0 = Clear and disable abort
1 = On-board VGA controller enabled
1 = CMOS okay
0 = Clear CMOS
Chapter 1 – Introduction
Result
R/W
R/W
R/W
R/W
R/W
R
R
R
R
R/W
R
R
R
R
R
R/W
R
R
2-3