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authorMartin Str|mberg <ams@ludd.ltu.se>2017-03-26 07:32:11 -0400
committerGene Cumm <gene.cumm@gmail.com>2017-03-28 10:37:51 -0400
commit32c09027423f61c305e2423e52f5f69ecad8e2c0 (patch)
treed264c7b6161b87fa8c0eee9bb5478a53ab60c85c
parent2b351509e19072dc74b084c6cda38431b3028fb5 (diff)
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mbr/isohdpfx.S: correct stack for heads/sectors; revert
Heads and sectors were pushed in reverse order per isolinux.asm bb519a95 reversed the order of heads/sectors on the stack Signed-off-by: Gene Cumm <gene.cumm@gmail.com>
-rw-r--r--mbr/isohdpfx.S6
1 files changed, 3 insertions, 3 deletions
diff --git a/mbr/isohdpfx.S b/mbr/isohdpfx.S
index 17e1efe1..f9e96919 100644
--- a/mbr/isohdpfx.S
+++ b/mbr/isohdpfx.S
@@ -175,12 +175,12 @@ next:
/* Get (C)HS geometry */
movb $0x08, %ah
int $0x13
- andw $0x3f, %cx /* Sector count */
popw %bx /* EBIOS flag */
- pushw %cx /* -16: Save sectors on the stack */
movzbw %dh, %ax /* dh = max head */
incw %ax /* From 0-based max to count */
- pushw %ax /* -18: Save heads on the stack */
+ pushw %ax /* -16: Save heads on the stack */
+ andw $0x3f, %cx /* Sector count */
+ pushw %cx /* -18: Save sectors on the stack */
mulw %cx /* Heads*sectors -> sectors per cylinder */
pushw %bx /* -20: EBIOS flag */