Add int1589 support.

Int1589 switches into protected mode for the caller.
Also, consistently use BUILD_BIOS_ADDR/SIZE in GDT macros.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/misc.c b/src/misc.c
index b33ef645..354df875 100644
--- a/src/misc.c
+++ b/src/misc.c
@@ -153,7 +153,7 @@ u64 rombios32_gdt[] VAR16VISIBLE __aligned(8) = {
     // 32 bit flat data segment (SEG32_MODE32_DS)
     GDT_LIMIT(0xfffff) | GDT_DATA | GDT_B | GDT_G,
     // 16 bit code segment base=0xf0000 limit=0xffff (SEG32_MODE16_CS)
-    GDT_LIMIT(0x0ffff) | GDT_CODE | GDT_BASE(0xf0000),
+    GDT_LIMIT(BUILD_BIOS_SIZE-1) | GDT_CODE | GDT_BASE(BUILD_BIOS_ADDR),
     // 16 bit data segment base=0x0 limit=0xffff (SEG32_MODE16_DS)
     GDT_LIMIT(0x0ffff) | GDT_DATA,
     // 16 bit code segment base=0 limit=0xffffffff (SEG32_MODE16BIG_CS)