mirror of
https://github.com/deater/dos33fsprogs.git
synced 2025-01-12 15:30:55 +00:00
chiptune_player: mess arround with unrolling
This commit is contained in:
Vince Weaver
parent
b56b3238bd
commit
277b2cfffb
@ -481,3 +481,7 @@ Interrupt Timing / AY write latency:
|
||||
Only write registers that change. Added 6 cycles per loop
|
||||
1107 worst case = 13+2+(10+5+62+7)*13
|
||||
316 if only one reg changed = 13+2+(18*13)+67
|
||||
|
||||
Was unnecessarily saving/restoring value to mem, save 2 cycles/loop
|
||||
1081 worst case = 13+2+(10+5+60+7)*13
|
||||
314 if only one reg changed = 13+2+(18*13)+65
|
||||
|
||||
@ -29,7 +29,8 @@ NUM_FILES EQU 15
|
||||
lda #$ff
|
||||
sta RASTERBARS_ON
|
||||
|
||||
lda #7 ; start at LYRA
|
||||
lda #4 ; start at DEMO4
|
||||
; lda #7 ; start at LYRA
|
||||
; lda #10 ; start at SDEMO
|
||||
sta WHICH_FILE
|
||||
|
||||
|
||||
@ -47,6 +47,9 @@ mb_write_frame:
|
||||
; loop through the 14 registers
|
||||
; reading the value, then write out
|
||||
;==================================
|
||||
; inlined "write_ay_both" to save up to 156 (12*13) cycles
|
||||
; unrolled
|
||||
|
||||
mb_write_loop:
|
||||
lda REGISTER_DUMP,X ; load register value ; 4
|
||||
cmp REGISTER_OLD,X ; compare with old values ; 4
|
||||
@ -64,9 +67,6 @@ mb_write_loop:
|
||||
;============
|
||||
; typ 5
|
||||
mb_not_13:
|
||||
sta MB_VALUE ; 3
|
||||
|
||||
; inlined "write_ay_both" to save 12 cycles
|
||||
|
||||
; address
|
||||
stx MOCK_6522_ORA1 ; put address on PA1 ; 4
|
||||
@ -79,15 +79,15 @@ mb_not_13:
|
||||
sta MOCK_6522_ORB2 ; 4
|
||||
|
||||
; value
|
||||
lda MB_VALUE ; 3
|
||||
sta MOCK_6522_ORA1 ; put value on PA1 ; 4
|
||||
sta MOCK_6522_ORA2 ; put value on PA2 ; 4
|
||||
lda #MOCK_AY_WRITE ; ; 2
|
||||
sta MOCK_6522_ORB1 ; write on PB1 ; 4
|
||||
sta MOCK_6522_ORB2 ; write on PB2 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
sta MOCK_6522_ORB2 ; 4
|
||||
lda REGISTER_DUMP,X ; load register value ; 4
|
||||
sta MOCK_6522_ORA1 ; put value on PA1 ; 4
|
||||
sta MOCK_6522_ORA2 ; put value on PA2 ; 4
|
||||
lda #MOCK_AY_WRITE ; ; 2
|
||||
sta MOCK_6522_ORB1 ; write on PB1 ; 4
|
||||
sta MOCK_6522_ORB2 ; write on PB2 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
sta MOCK_6522_ORB2 ; 4
|
||||
|
||||
;===========
|
||||
; 62
|
||||
@ -121,17 +121,12 @@ mb_reg_copy:
|
||||
mb_load_values:
|
||||
|
||||
ldx #0 ; set up reg count ; 2
|
||||
|
||||
ldy MB_CHUNK_OFFSET ; get chunk offset ; 3
|
||||
|
||||
|
||||
|
||||
;=============
|
||||
; 5
|
||||
|
||||
mb_load_loop:
|
||||
lda (INL),y ; load register value ; 5
|
||||
|
||||
sta REGISTER_DUMP,X ; 4
|
||||
;============
|
||||
; 9
|
||||
@ -163,8 +158,6 @@ mb_load_loop:
|
||||
; typ 6
|
||||
mb_not_done:
|
||||
|
||||
|
||||
|
||||
;==============================================
|
||||
; incremement offset. If 0 move to next chunk
|
||||
;==============================================
|
||||
@ -363,7 +356,7 @@ exit_interrupt:
|
||||
|
||||
;============
|
||||
; typical
|
||||
; 1358 cycles
|
||||
; ???? cycles
|
||||
|
||||
|
||||
REGISTER_OLD:
|
||||
|
||||
674
chiptune_player/interrupt_handler_unrolled.s
Normal file
674
chiptune_player/interrupt_handler_unrolled.s
Normal file
@ -0,0 +1,674 @@
|
||||
;================================
|
||||
;================================
|
||||
; mockingboard interrupt handler
|
||||
;================================
|
||||
;================================
|
||||
; On Apple II/6502 the interrupt handler jumps to address in 0xfffe
|
||||
; This is in the ROM, which saves the registers
|
||||
; on older IIe it saved A to $45 (which could mess with DISK II)
|
||||
; newer IIe doesn't do that.
|
||||
; It then calculates if it is a BRK or not (which trashes A)
|
||||
; Then it sets up the stack like an interrupt and calls 0x3fe
|
||||
|
||||
TIME_OFFSET EQU 13
|
||||
|
||||
interrupt_handler:
|
||||
pha ; save A ; 3
|
||||
; Should we save X and Y too?
|
||||
|
||||
; inc $0404 ; debug (flashes char onscreen)
|
||||
|
||||
bit $C404 ; clear 6522 interrupt by reading T1C-L ; 4
|
||||
|
||||
|
||||
lda DONE_PLAYING ; 3
|
||||
beq mb_play_music ; if song done, don't play music ; 3/2nt
|
||||
jmp check_keyboard ; 3
|
||||
;============
|
||||
; 13
|
||||
|
||||
mb_play_music:
|
||||
|
||||
|
||||
;======================================
|
||||
; Write frames to Mockingboard
|
||||
;======================================
|
||||
; actually plays frame loaded at end of
|
||||
; last interrupt, so 20ms behind?
|
||||
|
||||
mb_write_frame:
|
||||
|
||||
;==================================
|
||||
; loop through the 14 registers
|
||||
; reading the value, then write out
|
||||
;==================================
|
||||
; inlined "write_ay_both" to save up to 156 (12*13) cycles
|
||||
; unrolled
|
||||
|
||||
mb_write_r0_right:
|
||||
|
||||
lda REGISTER_DUMP+0 ; load register value ; 3
|
||||
cmp REGISTER_OLD+0 ; compare with old values ; 4
|
||||
beq mb_write_r1_right ; 3/2nt
|
||||
;=============
|
||||
; typ 10
|
||||
; address
|
||||
ldx #0 ; 2
|
||||
stx MOCK_6522_ORA1 ; put address on PA1 ; 4
|
||||
lda #MOCK_AY_LATCH_ADDR ; latch_address for PB1 ; 2
|
||||
sta MOCK_6522_ORB1 ; latch_address on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
; value
|
||||
lda REGISTER_DUMP+0 ; load register value ; 3
|
||||
sta MOCK_6522_ORA1 ; put value on PA1 ; 4
|
||||
lda #MOCK_AY_WRITE ; ; 2
|
||||
sta MOCK_6522_ORB1 ; write on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
;===========
|
||||
; 37
|
||||
|
||||
mb_write_r1_right:
|
||||
|
||||
lda REGISTER_DUMP+1 ; load register value ; 3
|
||||
cmp REGISTER_OLD+1 ; compare with old values ; 4
|
||||
beq mb_write_r2_right ; 3/2nt
|
||||
;=============
|
||||
; typ 10
|
||||
; address
|
||||
ldx #1 ; 2
|
||||
stx MOCK_6522_ORA1 ; put address on PA1 ; 4
|
||||
lda #MOCK_AY_LATCH_ADDR ; latch_address for PB1 ; 2
|
||||
sta MOCK_6522_ORB1 ; latch_address on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
; value
|
||||
lda REGISTER_DUMP+1 ; load register value ; 3
|
||||
sta MOCK_6522_ORA1 ; put value on PA1 ; 4
|
||||
lda #MOCK_AY_WRITE ; ; 2
|
||||
sta MOCK_6522_ORB1 ; write on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
;===========
|
||||
; 37
|
||||
mb_write_r2_right:
|
||||
|
||||
lda REGISTER_DUMP+2 ; load register value ; 3
|
||||
cmp REGISTER_OLD+2 ; compare with old values ; 4
|
||||
beq mb_write_r3_right ; 3/2nt
|
||||
;=============
|
||||
; typ 10
|
||||
; address
|
||||
ldx #2 ; 2
|
||||
stx MOCK_6522_ORA1 ; put address on PA1 ; 4
|
||||
lda #MOCK_AY_LATCH_ADDR ; latch_address for PB1 ; 2
|
||||
sta MOCK_6522_ORB1 ; latch_address on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
; value
|
||||
lda REGISTER_DUMP+2 ; load register value ; 3
|
||||
sta MOCK_6522_ORA1 ; put value on PA1 ; 4
|
||||
lda #MOCK_AY_WRITE ; ; 2
|
||||
sta MOCK_6522_ORB1 ; write on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
;===========
|
||||
; 37
|
||||
mb_write_r3_right:
|
||||
|
||||
lda REGISTER_DUMP+3 ; load register value ; 3
|
||||
cmp REGISTER_OLD+3 ; compare with old values ; 4
|
||||
beq mb_write_r4_right ; 3/2nt
|
||||
;=============
|
||||
; typ 10
|
||||
; address
|
||||
ldx #3 ; 2
|
||||
stx MOCK_6522_ORA1 ; put address on PA1 ; 4
|
||||
lda #MOCK_AY_LATCH_ADDR ; latch_address for PB1 ; 2
|
||||
sta MOCK_6522_ORB1 ; latch_address on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
; value
|
||||
lda REGISTER_DUMP+3 ; load register value ; 3
|
||||
sta MOCK_6522_ORA1 ; put value on PA1 ; 4
|
||||
lda #MOCK_AY_WRITE ; ; 2
|
||||
sta MOCK_6522_ORB1 ; write on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
;===========
|
||||
; 37
|
||||
mb_write_r4_right:
|
||||
|
||||
lda REGISTER_DUMP+4 ; load register value ; 3
|
||||
cmp REGISTER_OLD+4 ; compare with old values ; 4
|
||||
beq mb_write_r5_right ; 3/2nt
|
||||
;=============
|
||||
; typ 10
|
||||
; address
|
||||
ldx #4 ; 2
|
||||
stx MOCK_6522_ORA1 ; put address on PA1 ; 4
|
||||
lda #MOCK_AY_LATCH_ADDR ; latch_address for PB1 ; 2
|
||||
sta MOCK_6522_ORB1 ; latch_address on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
; value
|
||||
lda REGISTER_DUMP+4 ; load register value ; 3
|
||||
sta MOCK_6522_ORA1 ; put value on PA1 ; 4
|
||||
lda #MOCK_AY_WRITE ; ; 2
|
||||
sta MOCK_6522_ORB1 ; write on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
;===========
|
||||
; 37
|
||||
mb_write_r5_right:
|
||||
|
||||
lda REGISTER_DUMP+5 ; load register value ; 3
|
||||
cmp REGISTER_OLD+5 ; compare with old values ; 4
|
||||
beq mb_write_r6_right ; 3/2nt
|
||||
;=============
|
||||
; typ 10
|
||||
; address
|
||||
ldx #5 ; 2
|
||||
stx MOCK_6522_ORA1 ; put address on PA1 ; 4
|
||||
lda #MOCK_AY_LATCH_ADDR ; latch_address for PB1 ; 2
|
||||
sta MOCK_6522_ORB1 ; latch_address on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
; value
|
||||
lda REGISTER_DUMP+5 ; load register value ; 3
|
||||
sta MOCK_6522_ORA1 ; put value on PA1 ; 4
|
||||
lda #MOCK_AY_WRITE ; ; 2
|
||||
sta MOCK_6522_ORB1 ; write on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
;===========
|
||||
; 37
|
||||
mb_write_r6_right:
|
||||
|
||||
lda REGISTER_DUMP+6 ; load register value ; 3
|
||||
cmp REGISTER_OLD+6 ; compare with old values ; 4
|
||||
beq mb_write_r7_right ; 3/2nt
|
||||
;=============
|
||||
; typ 10
|
||||
; address
|
||||
ldx #6 ; 2
|
||||
stx MOCK_6522_ORA1 ; put address on PA1 ; 4
|
||||
lda #MOCK_AY_LATCH_ADDR ; latch_address for PB1 ; 2
|
||||
sta MOCK_6522_ORB1 ; latch_address on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
; value
|
||||
lda REGISTER_DUMP+6 ; load register value ; 3
|
||||
sta MOCK_6522_ORA1 ; put value on PA1 ; 4
|
||||
lda #MOCK_AY_WRITE ; ; 2
|
||||
sta MOCK_6522_ORB1 ; write on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
;===========
|
||||
; 37
|
||||
mb_write_r7_right:
|
||||
|
||||
lda REGISTER_DUMP+7 ; load register value ; 3
|
||||
cmp REGISTER_OLD+7 ; compare with old values ; 4
|
||||
beq mb_write_r8_right ; 3/2nt
|
||||
;=============
|
||||
; typ 10
|
||||
; address
|
||||
ldx #7 ; 2
|
||||
stx MOCK_6522_ORA1 ; put address on PA1 ; 4
|
||||
lda #MOCK_AY_LATCH_ADDR ; latch_address for PB1 ; 2
|
||||
sta MOCK_6522_ORB1 ; latch_address on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
; value
|
||||
lda REGISTER_DUMP+7 ; load register value ; 3
|
||||
sta MOCK_6522_ORA1 ; put value on PA1 ; 4
|
||||
lda #MOCK_AY_WRITE ; ; 2
|
||||
sta MOCK_6522_ORB1 ; write on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
;===========
|
||||
; 37
|
||||
|
||||
mb_write_r8_right:
|
||||
|
||||
lda REGISTER_DUMP+8 ; load register value ; 3
|
||||
cmp REGISTER_OLD+8 ; compare with old values ; 4
|
||||
beq mb_write_r9_right ; 3/2nt
|
||||
;=============
|
||||
; typ 10
|
||||
; address
|
||||
ldx #8 ; 2
|
||||
stx MOCK_6522_ORA1 ; put address on PA1 ; 4
|
||||
lda #MOCK_AY_LATCH_ADDR ; latch_address for PB1 ; 2
|
||||
sta MOCK_6522_ORB1 ; latch_address on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
; value
|
||||
lda REGISTER_DUMP+8 ; load register value ; 3
|
||||
sta MOCK_6522_ORA1 ; put value on PA1 ; 4
|
||||
lda #MOCK_AY_WRITE ; ; 2
|
||||
sta MOCK_6522_ORB1 ; write on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
;===========
|
||||
; 37
|
||||
mb_write_r9_right:
|
||||
|
||||
lda REGISTER_DUMP+9 ; load register value ; 3
|
||||
cmp REGISTER_OLD+9 ; compare with old values ; 4
|
||||
beq mb_write_r10_right ; 3/2nt
|
||||
;=============
|
||||
; typ 10
|
||||
; address
|
||||
ldx #9 ; 2
|
||||
stx MOCK_6522_ORA1 ; put address on PA1 ; 4
|
||||
lda #MOCK_AY_LATCH_ADDR ; latch_address for PB1 ; 2
|
||||
sta MOCK_6522_ORB1 ; latch_address on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
; value
|
||||
lda REGISTER_DUMP+9 ; load register value ; 3
|
||||
sta MOCK_6522_ORA1 ; put value on PA1 ; 4
|
||||
lda #MOCK_AY_WRITE ; ; 2
|
||||
sta MOCK_6522_ORB1 ; write on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
;===========
|
||||
; 37
|
||||
mb_write_r10_right:
|
||||
|
||||
lda REGISTER_DUMP+10; load register value ; 3
|
||||
cmp REGISTER_OLD+10 ; compare with old values ; 4
|
||||
beq mb_write_r11_right ; 3/2nt
|
||||
;=============
|
||||
; typ 10
|
||||
; address
|
||||
ldx #10 ; 2
|
||||
stx MOCK_6522_ORA1 ; put address on PA1 ; 4
|
||||
lda #MOCK_AY_LATCH_ADDR ; latch_address for PB1 ; 2
|
||||
sta MOCK_6522_ORB1 ; latch_address on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
; value
|
||||
lda REGISTER_DUMP+10 ; load register value ; 3
|
||||
sta MOCK_6522_ORA1 ; put value on PA1 ; 4
|
||||
lda #MOCK_AY_WRITE ; ; 2
|
||||
sta MOCK_6522_ORB1 ; write on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
;===========
|
||||
; 37
|
||||
mb_write_r11_right:
|
||||
|
||||
lda REGISTER_DUMP+11; load register value ; 3
|
||||
cmp REGISTER_OLD+11 ; compare with old values ; 4
|
||||
beq mb_write_r12_right ; 3/2nt
|
||||
;=============
|
||||
; typ 10
|
||||
; address
|
||||
ldx #11 ; 2
|
||||
stx MOCK_6522_ORA1 ; put address on PA1 ; 4
|
||||
lda #MOCK_AY_LATCH_ADDR ; latch_address for PB1 ; 2
|
||||
sta MOCK_6522_ORB1 ; latch_address on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
; value
|
||||
lda REGISTER_DUMP+11 ; load register value ; 3
|
||||
sta MOCK_6522_ORA1 ; put value on PA1 ; 4
|
||||
lda #MOCK_AY_WRITE ; ; 2
|
||||
sta MOCK_6522_ORB1 ; write on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
;===========
|
||||
; 37
|
||||
mb_write_r12_right:
|
||||
|
||||
lda REGISTER_DUMP+12; load register value ; 3
|
||||
cmp REGISTER_OLD+12 ; compare with old values ; 4
|
||||
beq mb_write_r13_right ; 3/2nt
|
||||
;=============
|
||||
; typ 10
|
||||
; address
|
||||
ldx #12 ; 2
|
||||
stx MOCK_6522_ORA1 ; put address on PA1 ; 4
|
||||
lda #MOCK_AY_LATCH_ADDR ; latch_address for PB1 ; 2
|
||||
sta MOCK_6522_ORB1 ; latch_address on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
; value
|
||||
lda REGISTER_DUMP+12 ; load register value ; 3
|
||||
sta MOCK_6522_ORA1 ; put value on PA1 ; 4
|
||||
lda #MOCK_AY_WRITE ; ; 2
|
||||
sta MOCK_6522_ORB1 ; write on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
;===========
|
||||
; 37
|
||||
mb_write_r13_right:
|
||||
|
||||
lda REGISTER_DUMP+13; load register value ; 3
|
||||
cmp REGISTER_OLD+13 ; compare with old values ; 4
|
||||
beq mb_write_done_right ; 3/2nt
|
||||
cmp #$ff ; if FF we skip r13 ; 2
|
||||
beq mb_write_done_right ; 3/2nt
|
||||
|
||||
|
||||
;=============
|
||||
; typ 10
|
||||
; address
|
||||
ldx #13 ; 2
|
||||
stx MOCK_6522_ORA1 ; put address on PA1 ; 4
|
||||
lda #MOCK_AY_LATCH_ADDR ; latch_address for PB1 ; 2
|
||||
sta MOCK_6522_ORB1 ; latch_address on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
; value
|
||||
lda REGISTER_DUMP+13 ; load register value ; 3
|
||||
sta MOCK_6522_ORA1 ; put value on PA1 ; 4
|
||||
lda #MOCK_AY_WRITE ; ; 2
|
||||
sta MOCK_6522_ORB1 ; write on PB1 ; 4
|
||||
lda #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
sta MOCK_6522_ORB1 ; 4
|
||||
|
||||
;===========
|
||||
; 37
|
||||
mb_write_done_right:
|
||||
|
||||
|
||||
;=====================================
|
||||
; Copy registers to old
|
||||
;=====================================
|
||||
ldx #13 ; 2
|
||||
mb_reg_copy:
|
||||
lda REGISTER_DUMP,X ; load register value ; 4
|
||||
sta REGISTER_OLD,X ; compare with old values ; 4
|
||||
dex ; 2
|
||||
bpl mb_reg_copy ; 2nt/3
|
||||
;=============
|
||||
; 171
|
||||
|
||||
;===================================
|
||||
; Load all 14 registers in advance
|
||||
;===================================
|
||||
; note, assuming not cross page boundary, not any slower
|
||||
; then loading from zero page?
|
||||
|
||||
mb_load_values:
|
||||
|
||||
ldx #0 ; set up reg count ; 2
|
||||
|
||||
ldy MB_CHUNK_OFFSET ; get chunk offset ; 3
|
||||
|
||||
|
||||
|
||||
;=============
|
||||
; 5
|
||||
|
||||
mb_load_loop:
|
||||
lda (INL),y ; load register value ; 5
|
||||
|
||||
sta REGISTER_DUMP,X ; 4
|
||||
;============
|
||||
; 9
|
||||
;====================
|
||||
; point to next page
|
||||
;====================
|
||||
|
||||
clc ; point to next interleaved ; 2
|
||||
lda INH ; page by adding CHUNKSIZE (3/1); 3
|
||||
adc CHUNKSIZE ; 3
|
||||
sta INH ; 3
|
||||
|
||||
inx ; point to next register ; 2
|
||||
cpx #14 ; if 14 we're done ; 2
|
||||
bmi mb_load_loop ; otherwise, loop ; 3/2nt
|
||||
;============
|
||||
; 18
|
||||
|
||||
;=========================================
|
||||
; if A_COARSE_TONE is $ff then we are done
|
||||
|
||||
lda A_COARSE_TONE ; 3
|
||||
bpl mb_not_done ; 3/2nt
|
||||
|
||||
lda #1 ; set done playing ; 2
|
||||
|
||||
jmp quiet_exit ; 3
|
||||
;===========
|
||||
; typ 6
|
||||
mb_not_done:
|
||||
|
||||
|
||||
|
||||
;==============================================
|
||||
; incremement offset. If 0 move to next chunk
|
||||
;==============================================
|
||||
|
||||
increment_offset:
|
||||
|
||||
inc MB_CHUNK_OFFSET ; increment offset ; 5
|
||||
bne back_to_first_reg ; if not zero, done ; 3/2nt
|
||||
|
||||
|
||||
;=====================
|
||||
; move to next state
|
||||
;=====================
|
||||
|
||||
clc
|
||||
rol DECODER_STATE ; next state ; 5
|
||||
; 20 -> 40 -> 80 -> c+00
|
||||
bcs wraparound_to_a ; 3/2nt
|
||||
|
||||
bit DECODER_STATE ;bit7->N bit6->V
|
||||
bvs back_to_first_reg ; do nothing on B ; 3/2nt
|
||||
|
||||
start_c:
|
||||
lda #1
|
||||
sta CHUNKSIZE
|
||||
|
||||
; setup next three chunks of song
|
||||
|
||||
lda #1 ; start decompressing
|
||||
sta DECOMPRESS_TIME ; outside of handler
|
||||
|
||||
jmp back_to_first_reg
|
||||
|
||||
wraparound_to_a:
|
||||
lda #$3
|
||||
sta CHUNKSIZE
|
||||
lda #$20
|
||||
sta DECODER_STATE
|
||||
sta COPY_TIME ; start copying
|
||||
|
||||
lda DECOMPRESS_TIME
|
||||
beq blah
|
||||
lda #1
|
||||
sta DECODE_ERROR
|
||||
blah:
|
||||
;==============================
|
||||
; After 14th reg, reset back to
|
||||
; read R0 data
|
||||
;==============================
|
||||
|
||||
back_to_first_reg:
|
||||
lda #0 ; 2
|
||||
bit DECODER_STATE ; 3
|
||||
bmi back_to_first_reg_c ; 2nt/3
|
||||
bvc back_to_first_reg_a ; 2nt/3
|
||||
|
||||
back_to_first_reg_b:
|
||||
lda #$1 ; offset by 1
|
||||
|
||||
back_to_first_reg_a:
|
||||
clc ; 2
|
||||
adc #>UNPACK_BUFFER ; in proper chunk 1 or 2 ; 2
|
||||
|
||||
jmp update_r0_pointer ; 3
|
||||
|
||||
back_to_first_reg_c:
|
||||
lda #>(UNPACK_BUFFER+$2A00) ; in linear C area ; 2
|
||||
|
||||
update_r0_pointer:
|
||||
sta INH ; update r0 pointer ; 3
|
||||
|
||||
|
||||
|
||||
;=================================
|
||||
; Finally done with this interrupt
|
||||
;=================================
|
||||
|
||||
done_interrupt:
|
||||
|
||||
|
||||
;=====================
|
||||
; Update time counter
|
||||
;=====================
|
||||
update_time:
|
||||
inc FRAME_COUNT ; 5
|
||||
lda FRAME_COUNT ; 3
|
||||
cmp #50 ; 3
|
||||
bne done_time ; 3/2nt
|
||||
|
||||
lda #$0 ; 2
|
||||
sta FRAME_COUNT ; 3
|
||||
|
||||
update_second_ones:
|
||||
inc $7d0+TIME_OFFSET+3 ; 6
|
||||
inc $bd0+TIME_OFFSET+3 ; 6
|
||||
lda $bd0+TIME_OFFSET+3 ; 4
|
||||
cmp #$ba ; one past '9' ; 2
|
||||
bne done_time ; 3/2nt
|
||||
lda #'0'+$80 ; 2
|
||||
sta $7d0+TIME_OFFSET+3 ; 4
|
||||
sta $bd0+TIME_OFFSET+3 ; 4
|
||||
update_second_tens:
|
||||
inc $7d0+TIME_OFFSET+2 ; 6
|
||||
inc $bd0+TIME_OFFSET+2 ; 6
|
||||
lda $bd0+TIME_OFFSET+2 ; 4
|
||||
cmp #$b6 ; 6 (for 60 seconds) ; 2
|
||||
bne done_time ; 3/2nt
|
||||
lda #'0'+$80 ; 2
|
||||
sta $7d0+TIME_OFFSET+2 ; 4
|
||||
sta $bd0+TIME_OFFSET+2 ; 4
|
||||
update_minutes:
|
||||
inc $7d0+TIME_OFFSET ; 6
|
||||
inc $bd0+TIME_OFFSET ; 6
|
||||
; we don't handle > 9:59 songs yet
|
||||
done_time:
|
||||
;=============
|
||||
; 90 worst
|
||||
|
||||
|
||||
;=================================
|
||||
; Moved visualization here as a hack
|
||||
;=================================
|
||||
|
||||
;============================
|
||||
; Visualization
|
||||
;============================
|
||||
|
||||
jsr clear_top
|
||||
lda RASTERBARS_ON
|
||||
beq skip_rasters
|
||||
jsr draw_rasters
|
||||
skip_rasters:
|
||||
jsr volume_bars
|
||||
jsr page_flip
|
||||
|
||||
|
||||
check_keyboard:
|
||||
|
||||
jsr get_key
|
||||
lda LASTKEY
|
||||
beq exit_interrupt
|
||||
|
||||
cmp #(' '+$80)
|
||||
bne key_R
|
||||
key_space:
|
||||
lda #$80
|
||||
eor DONE_PLAYING
|
||||
jmp quiet_exit
|
||||
|
||||
key_R:
|
||||
cmp #'R'
|
||||
bne key_left
|
||||
|
||||
lda #$ff
|
||||
eor RASTERBARS_ON
|
||||
sta RASTERBARS_ON
|
||||
jmp done_key
|
||||
|
||||
key_left:
|
||||
cmp #'A'
|
||||
bne key_right
|
||||
|
||||
lda #$40
|
||||
bne quiet_exit
|
||||
|
||||
key_right:
|
||||
cmp #'D'
|
||||
bne done_key
|
||||
|
||||
lda #$20
|
||||
bne quiet_exit
|
||||
|
||||
done_key:
|
||||
jmp exit_interrupt
|
||||
|
||||
quiet_exit:
|
||||
sta DONE_PLAYING
|
||||
jsr clear_ay_both
|
||||
|
||||
;=====================================
|
||||
; clear register area
|
||||
;=====================================
|
||||
ldx #13 ; 2
|
||||
lda #0 ; 2
|
||||
mb_clear_reg:
|
||||
sta REGISTER_DUMP,X ; clear register value ; 4
|
||||
sta REGISTER_OLD,X ; clear old values ; 4
|
||||
dex ; 2
|
||||
bpl mb_clear_reg ; 2nt/3
|
||||
|
||||
exit_interrupt:
|
||||
|
||||
pla ; restore a ; 4
|
||||
|
||||
rti ; return from interrupt ; 6
|
||||
|
||||
;============
|
||||
; typical
|
||||
; 1358 cycles
|
||||
|
||||
|
||||
REGISTER_OLD:
|
||||
.byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0
|
||||
Loading…
x
Reference in New Issue
Block a user