Use symbolic names instead of numbers

git-svn-id: svn://svn.cc65.org/cc65/trunk@2457 b7a2c559-68d2-44c3-8de9-860c34a00d81

diff --git a/libsrc/c64/c64-ptvjoy.s b/libsrc/c64/c64-ptvjoy.s
index 6e01895cf96d9a8988a51751460595bc3abb673e..9c5db39f0aef72c036ceb666963f58525d91c2a0 100755 (executable)
--- a/libsrc/c64/c64-ptvjoy.s
+++ b/libsrc/c64/c64-ptvjoy.s
@@ -84,14 +84,12 @@ COUNT:
 ; READ: Read a particular joystick passed in A.
 ;
 
-READ:
-        tax        ; Joystick number into X
-        bne joy2
+READ:   tax                    ; Joystick number into X
+        bne     joy2
 
-        ; Read joystick 1
+; Read joystick 1
 
-joy1:
-        lda    #$7F
+joy1:   lda    #$7F
         sei
         sta    CIA1_PRA
         lda    CIA1_PRB
@@ -100,58 +98,53 @@ joy1:
         eor    #$1F
         rts
 
-        ; Read joystick 2
+; Read joystick 2
 
-joy2:
-        dex
-        bne joy3
+joy2:   dex
+        bne     joy3
 
-        ; ldx  #0
-        lda    #$E0
-        ldy    #$FF
+        lda    #$E0
+        ldy    #$FF
         sei
-        sta    CIA1_DDRA
-        lda    CIA1_PRA
-        sty    CIA1_DDRA
+        sta    CIA1_DDRA
+        lda    CIA1_PRA
+        sty    CIA1_DDRA
         cli
-        and    #$1F
-        eor    #$1F
+        and    #$1F
+        eor    #$1F
         rts
 
-        ; Read joystick 3
+; Read joystick 3
 
-joy3:
-        dex
-        bne joy4
+joy3:   dex
+        bne     joy4
 
-        lda #%10000000  ; cia 2 port B Data-Direction
-        sta $dd03       ; bit 7: out    bit 6-0: in
+        lda     #%10000000      ; cia 2 port B Data-Direction
+        sta     CIA2_DDRB       ; bit 7: out    bit 6-0: in
 
-        lda #$80        ; cia 2 port B read/write
-        sta $dd01       ; (output one at PB7)
+        lda     #$80            ; cia 2 port B read/write
+        sta     CIA2_PRB        ; (output one at PB7)
 
-        lda $dd01       ; cia 2 port B read/write
-        and #$1f        ; get bit 4-0 (PB4-PB0)
-        ; ldx #0
+        lda     CIA2_PRB        ; cia 2 port B read/write
+        and     #$1f            ; get bit 4-0 (PB4-PB0)
         rts
 
-        ; Read joystick 4
+; Read joystick 4
 
-joy4:
-        lda #%10000000  ; cia 2 port B Data-Direction
-        sta $dd03       ; bit 7: out    bit 6-0: in
+joy4:   lda     #%10000000      ; cia 2 port B Data-Direction
+        sta     CIA2_DDRB       ; bit 7: out    bit 6-0: in
 
-        lda #$00        ; cia 2 port B read/write
-        sta $dd01       ; (output zero at PB7)
+        lda     #$00            ; cia 2 port B read/write
+        sta     CIA2_PRB        ; (output zero at PB7)
 
-        lda $dd01       ; cia 2 port B read/write
-        and #$0f        ; get bit 3-0 (PB3-PB0)
-        sta tmp1        ; joy 4 directions
+        lda     CIA2_PRB        ; cia 2 port B read/write
+        and     #$0f            ; get bit 3-0 (PB3-PB0)
+        sta     tmp1            ; joy 4 directions
 
-        lda $dd01       ; cia 2 port B read/write
-        and #%00100000  ; get bit 5 (PB5)
+        lda     CIA2_PRB        ; cia 2 port B read/write
+        and     #%00100000      ; get bit 5 (PB5)
         lsr
-        ora tmp1
+        ora     tmp1
 
         ldx #0
         rts