mirror of
https://github.com/KarolS/millfork.git
synced 2024-11-01 05:05:32 +00:00
92 lines
1.9 KiB
Plaintext
92 lines
1.9 KiB
Plaintext
#if not(NES)
|
|
#warn nes_hardware module should be only used on NES/Famicom targets
|
|
#endif
|
|
|
|
volatile byte ppu_ctrl @$2000
|
|
volatile byte ppu_mask @$2001
|
|
volatile byte ppu_status @$2002
|
|
volatile byte oam_addr @$2003
|
|
volatile byte oam_data @$2004
|
|
volatile byte ppu_scroll @$2005
|
|
volatile byte ppu_addr @$2006
|
|
volatile byte ppu_data @$2007
|
|
volatile byte oam_dma @$4014
|
|
|
|
// TODO: better names
|
|
|
|
volatile byte apu_pulse1_ctrl @$4000
|
|
volatile byte apu_pulse1_sweep @$4001
|
|
volatile word apu_pulse1_period @$4002
|
|
|
|
volatile byte apu_pulse2_ctrl @$4004
|
|
volatile byte apu_pulse2_sweep @$4005
|
|
volatile word apu_pulse2_period @$4006
|
|
|
|
volatile byte apu_triangle_unmute @$4008
|
|
volatile word apu_triangle_period @$400A
|
|
|
|
volatile byte apu_noise_ctrl @$400C
|
|
volatile byte apu_noise_period @$400E
|
|
|
|
volatile byte apu_dmc_ctrl @$4010
|
|
volatile byte apu_dmc_load @$4011
|
|
volatile byte apu_dmc_sample_addr @$4012
|
|
volatile byte apu_dmc_sample_length @$4013
|
|
|
|
volatile byte apu_status @$4015
|
|
volatile byte apu_frame_counter @$4017
|
|
|
|
volatile byte joypad1_ctrl @$4016
|
|
volatile byte joypad2_ctrl @$4017
|
|
|
|
inline asm byte strobe_joypad() {
|
|
? LDA #1
|
|
! STA joypad1_ctrl
|
|
? LSR
|
|
! STA joypad1_ctrl
|
|
? RTS
|
|
}
|
|
|
|
inline asm byte read_joypad1() {
|
|
! LDA joypad1_ctrl
|
|
? RTS
|
|
}
|
|
|
|
inline asm byte read_joypad2() {
|
|
! LDA joypad2_ctrl
|
|
? RTS
|
|
}
|
|
|
|
macro asm void simulate_reset() {
|
|
JMP (reset_vector.addr)
|
|
}
|
|
|
|
inline asm void ppu_set_addr(word ax) {
|
|
! STX ppu_addr
|
|
! STA ppu_addr
|
|
?RTS
|
|
}
|
|
|
|
inline asm byte read_ppu_status() {
|
|
! LDA ppu_status
|
|
? RTS
|
|
}
|
|
|
|
inline asm void ppu_set_scroll(byte a, byte x) {
|
|
BIT ppu_status
|
|
! STA ppu_scroll
|
|
! STX ppu_scroll
|
|
? RTS
|
|
}
|
|
|
|
inline asm void ppu_write_data(byte a) {
|
|
! STA ppu_data
|
|
? RTS
|
|
}
|
|
|
|
inline asm void ppu_oam_dma_write(byte a) {
|
|
! STA oam_dma
|
|
? RTS
|
|
}
|
|
|