Fix keyclick for real.

1 files changed, 0 insertions, 49 deletions

diff --git a/src/keyclick.s b/src/keyclick.s
deleted file mode 100644
index 3b4a591..0000000
--- a/src/keyclick.s
+++ /dev/null
@@ -1,49 +0,0 @@
- .include "atari.inc"
- .export _keyclick
- .import _cgetc
-
-; keyclick.s - just what you think it is.
-
-; How do you make it possible to disable the keyclick on the 400/800?
-; Don't use the OS K: handler.
-
- ;.ifdef REAL_KEYCLICK
- .if 1
-
- ; used to my own STA WSYNC loop, but that didn't respect NOCLIK on
- ; XL/XE machines.
- lda #0
- sta CH
- jsr _cgetc
- rts
-
- .else
-
-; Fake keyclick. 25 bytes of code. Sounds just like the real one, but
-; it won't mess up your DLIs because it's interruptible (though DLIs
-; might mess it up). Loop timing assumes a GR.0 type display list
-; with playfield DMA enabled and P/M DMA disabled.
-; Preserves A, returns with X=$ff, Y=0, N set, Z clear.
-_keyclick:
-@wcount:
- ldx VCOUNT   ; To make the timing consistent, wait until we're sure
- cpx #$10     ; that ANTIC is doing DMA.
- bne @wcount
-
- ldx #$7f
-@click:     ; I tuned this by ear, then cycle-counted afterward.
- stx CONSOL ; 4
- ldy #$07   ; 2
- ;lda #0     ; 2
- nop
-@c1:
- dey        ; inner: 2
- nop        ;        2
- bne @c1    ;        3
-            ;        7 cycles/loop, *7 = 49, -1 for failed BNE
-			   ; 48
- dex        ; 2
- bpl @click ; 3 = 61
- rts
-
- .endif