Undo my previous commit.

asminc/get_tv.inc

@@ -11,8 +11,6 @@
 .enum TV
     NTSC
     PAL
-    NTSC_OLD
-    PAL_N
     OTHER
 .endenum
 

include/cbm.h

@@ -150,9 +150,7 @@ struct cbm_dirent {
 
 #define TV_NTSC         0
 #define TV_PAL          1
-#define TV_NTSC_OLD     2
-#define TV_PAL_N        3
-#define TV_OTHER        4
+#define TV_OTHER        2
 
 unsigned char get_tv (void);
 /* Return the video mode the machine is using. */

libsrc/c64/get_tv.s

@@ -3,11 +3,6 @@
 ;
 ; unsigned char get_tv (void);
 ; /* Return the video mode the machine is using */
-;
-; Changed to actually detect the mode instead of using a flag
-; Marco van den Heuvel, 2018-03-08
-;
-; The detection goes wrong on accelerated machines for now.
 ;
 
         .include        "c64.inc"
@@ -18,42 +13,8 @@
 
 .proc   _get_tv
 
-        php
-        sei
-timing_loop_0:
-        lda     VIC_HLINE
-timing_loop_1:
-        cmp     VIC_HLINE
-        beq     timing_loop_1
-        bmi     timing_loop_0
-        and     #$03
-        cmp     #$01
-        bne     check_ntsc
-        lda     #TV::NTSC_OLD         ; NTSC OLD constant
-        bne     detected
-check_ntsc:
-        cmp     #$03
-        bcc     ntsc
-
-; check for PAL and PAL-N
-
-        ldx     #$00
-        lda     #$10
-timing_loop_2:
-        inx
-        cmp     VIC_HLINE
-        bne     timing_loop_2
-        lda     #TV::PAL              ; PAL constant
-        cpx     #$70
-        bcc     detected
-        lda     #TV::PAL_N            ; PAL-N constant
-detected:
-        ldx     #$00
-        plp
+        lda     PALFLAG
+        ldx     #0
         rts
 
-ntsc:
-        lda     #TV::NTSC             ; NTSC constant
-        beq     detected
-
 .endproc