fix 13-sector infinite loop

2024-12-22 04:29:59 +00:00 · 2021-07-08 20:57:25 -07:00 · 2021-07-08 20:57:25 -07:00 · eab36f7bfc
commit eab36f7bfc
parent 101c5ba5d7
1 changed files with 7 additions and 8 deletions
--- a/src/id/bootfailure.a
+++ b/src/id/bootfailure.a
@ -52,11 +52,8 @@ VerifyInfocom18
         cmp   #$AA
         bne   --
         jsr   ReadNib
-         ldx   gTrack
-         bne   .no13     ; skip if not boot phase
         cmp   #$B5      ; 13-sector only
         beq   .build13
-.no13
         cmp   #$AD
         bne   --

@ -122,20 +119,22 @@ VerifyInfocom18

 .RW18
         jsr   .rw18pro
-         bne   .jmpbadsect
+         bne   .badsect
         ldx   gIsRW18
         beq   .verifyrw18
         sta   gIsRW18
         bne   .checkmode ; always taken

-.jmpbadsect
-         jmp   .badsect
-
         ;build 5-and-3 decoding table
         ;for 13-sector support

+.no13
+         jmp   ---
+
 .build13
-         ldx   #$00
+         lda   gTrack
+         bne   .no13     ; skip if not boot phase
+         ldx   #0
         ldy   #$AB
 -        tya
         sta   tmp