diff options
| author | B. Watson <urchlay@slackware.uk> | 2026-03-09 02:03:42 -0400 |
|---|---|---|
| committer | B. Watson <urchlay@slackware.uk> | 2026-03-09 02:03:42 -0400 |
| commit | 9dba8f52b61b1d56d9cf8e63bd1dde2b31b25a5d (patch) | |
| tree | 91b01698979cfeae507eb820cd5e7f3027043b41 /src/bell.s | |
| parent | 7cada3864c10b14dec18a0efc768f3455004166b (diff) | |
| download | fujinet-chat-9dba8f52b61b1d56d9cf8e63bd1dde2b31b25a5d.tar.gz | |
audible and visual bell on hilite.
Diffstat (limited to 'src/bell.s')
| -rw-r--r-- | src/bell.s | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/bell.s b/src/bell.s new file mode 100644 index 0000000..6a27503 --- /dev/null +++ b/src/bell.s @@ -0,0 +1,45 @@ + + .include "atari.inc" + + .import _bell_type + .export _bell + +DISTVOL = $a8 +PITCH = $40 +JIFFIES = $03 + +_bell: + lda #<bell_callback + sta CDTMA2 + lda #>bell_callback + sta CDTMA2+1 + lda _bell_type + beq done + lda #JIFFIES + sta CDTMV2 + lda _bell_type + and #1 + beq check_flash + lda #DISTVOL + sta AUDC1 + lda #PITCH + sta AUDF1 +check_flash: + lda _bell_type + and #2 + beq done + lda #$08 + sta COLOR4 + lda #JIFFIES + sta CDTMV2 +done: + rts + +bell_callback: + lda #0 + sta AUDC1 + sta AUDF1 + sta COLOR4 + lda #JIFFIES + sta CDTMV2 + rts |