Fix multi-sector read using CHS mode

2025-10-10 15:10:42 +02:00
parent 32bacdd228
commit 56a1a811b9
1 changed files with 3 additions and 2 deletions
--- a/boot/bootsect/espboot.S
+++ b/boot/bootsect/espboot.S
@@ -151,7 +151,7 @@ ReadSectors:

 ReadCHS:
    /* Read sectors using CHS */
-    popal
+    pushw %cx
    pushal
    xorl %edx, %edx
    movzwl SectorsPerTrack - Start(%bp), %ecx
@@ -169,8 +169,9 @@ ReadCHS:
    orb %ah, %cl
    movw $0x0201, %ax
    int $0x13
-    jc DiskError
    popal
+    popw %cx
+    jc DiskError
    incl %eax
    movw %es, %dx
    addw $0x20, %dx