mirror of https://github.com/stid/woz64.git
39 lines
1.2 KiB
NASM
39 lines
1.2 KiB
NASM
#importonce
|
|
.filenamespace Sid
|
|
https://www.c64-wiki.com/wiki/SID
|
|
|
|
// ========================================================
|
|
// ////// CONSTANTS ///////////////////////////////////////
|
|
// ========================================================
|
|
|
|
|
|
.label FV1L = $d400 // frequency voice 1 low byte
|
|
.label FV1H = $d401 // frequency voice 1 high byte
|
|
.label PCWV1L = $d402 // pulse wave duty cycle voice 1 low byte
|
|
|
|
// TODO: Add more
|
|
|
|
.label FMVC = $d418 // filter mode and main volume control
|
|
// Bit 7 mute voice 3
|
|
// Bit 6 high pass
|
|
// Bit 5 band pass
|
|
// Bit 4 low pass
|
|
// Bit 3-0 main volume
|
|
|
|
|
|
|
|
// ========================================================
|
|
// ////// METHODS /////////////////////////////////////////
|
|
// ========================================================
|
|
|
|
|
|
* = * "SID HW"
|
|
|
|
init: {
|
|
ldx #$00
|
|
stx Sid.FMVC // TURN OFF SID
|
|
rts
|
|
}
|
|
|
|
|