Changeset 50090 in vbox

Timestamp:

Jan 17, 2014 12:04:45 PM (11 years ago)

Author:

vboxsync

Message:

BIOS: Support second CMOS bank for reads/writes.

File:

• trunk/src/VBox/Devices/PC/BIOS/bios.c (modified) (1 diff)

trunk/src/VBox/Devices/PC/BIOS/bios.c

@@ -81 +81 @@
 uint8_t inb_cmos(uint8_t cmos_reg)
 {
-    outb(0x70, cmos_reg);
-    return inb(0x71);
+    uint8_t     cmos_port = 0x70;
+
+    if (cmos_reg >= 0x80)
+        cmos_port += 2;
+    outb(cmos_port, cmos_reg);
+    return inb(cmos_port + 1);
 }
 
 void outb_cmos(uint8_t cmos_reg, uint8_t val)
 {
-    outb(0x70, cmos_reg);
-    outb(0x71, val);
+    uint8_t     cmos_port = 0x70;
+
+    if (cmos_reg >= 0x80)
+        cmos_port += 2;
+    outb(cmos_port, cmos_reg);
+    outb(cmos_port + 1, val);
 }