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millfork/include/x16_joy.mfk
2019-09-16 22:55:08 +02:00

90 lines
1.5 KiB
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void x16_reset_joy() {
input_dx = 0
input_dy = 0
input_a = 0
input_b = 0
input_x = 0
input_y = 0
input_start = 0
input_select = 0
input_l = 0
input_r = 0
}
alias reset_joy = x16_reset_joy!
// TODO: be more controller-agnostic?
// SNES:B NES:A keyboard:Ctrl
alias input_b = input_btn
// SNES:A
byte input_a
// SNES:X
byte input_x
// SNES:Y NES:B keyboard:Alt
byte input_y
// SNES/NES:Start keyboard:Enter
byte input_start
// SNES/NES:Select keyboard:Space
byte input_select
// SNES:L
byte input_l
// SNES:R
byte input_r
void read_joy1() {
x16_reset_joy()
read_also_joy1()
}
void read_joy2() {
x16_reset_joy()
read_also_joy2()
}
asm void read_also_joy1() {
JSR $FF06
LDA $F1
BNE __read_also_joy1_skip
LDA $EF
JSR x16_joy_byte0
LDA $F0
JSR x16_joy_byte1
__read_also_joy1_skip:
RTS
}
asm void read_also_joy2() {
JSR $FF06
LDA $F4
BNE __read_also_joy2_skip
LDA $F2
JSR x16_joy_byte0
LDA $F3
JSR x16_joy_byte1
__read_also_joy2_skip:
RTS
}
void x16_joy_byte0(byte value) {
if value & 8 == 0 { input_dy -= 1 }
if value & 4 == 0 { input_dy += 1 }
if value & 2 == 0 { input_dx -= 1 }
if value & 1 == 0 { input_dx += 1 }
if value & 16 == 0 { input_start += 1 }
if value & 32 == 0 { input_select += 1 }
if value & 64 == 0 { input_y += 1 }
if value & 128 == 0 { input_b += 1 }
}
void x16_joy_byte1(byte value) {
if value & 16 == 0 { input_r += 1 }
if value & 32 == 0 { input_l += 1 }
if value & 64 == 0 { input_x += 1 }
if value & 128 == 0 { input_a += 1 }
}