boot32: optimise read sector increment to prepare for DL patch

2024-01-19 20:33:01 +01:00 · 2024-01-19 20:33:01 +01:00 · 52136b27d6
parent 9a7d22701d
commit 52136b27d6
1 changed files with 4 additions and 2 deletions
--- a/boot/boot32.asm
+++ b/boot/boot32.asm
@ -388,8 +388,10 @@ read_ok:
                mov     es, cx

 no_incr_es:
-                add     ax,byte 1
-                adc     dx,byte 0
+		inc ax
+		jnz .no_carry
+		inc dx
+.no_carry:
                ret

       times   0x01f1-$+$$ db 0