ps/noiseplug
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fixed that damn melody smashing bug by removing i from sram

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This commit is contained in:
Joachim Fenkes 2012-08-11 17:27:57 +02:00
parent 71853df37d
commit 889e60aa07
1 changed files with 53 additions and 53 deletions
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102
avr/noiseplug.s
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@ -22,7 +22,6 @@ LEADINIT2 = 3571
.section .bss
.comm int_ctr, 1
.comm i, 3
.comm lead1, 4
.comm lead2, 4
@ -46,14 +45,14 @@ NULL:
.type __vector_4, @function
__vector_4:
push r16
push r24
in r16, SREG
lds r24,int_ctr
subi r24,lo8(-(1))
andi r24,lo8(3)
sts int_ctr,r24
out SREG,r16
pop r24
push r16
lds r16,int_ctr
subi r16, -1
andi r16, 3
sts int_ctr, r16
pop r16
out SREG, r16
pop r16
reti
.size __vector_4, .-__vector_4
@ -67,18 +66,18 @@ clear_sram:
sbrs r30, 5
rjmp clear_sram
ldi r18, 0;LEADSIZE
ldi r18, LEADSIZE
sts lead1, r18
sts lead2, r18
sts lead3, r18
; ldi r18, hi8(LEADINIT1)
; sts leadosc2, r18
; ldi r18, lo8(LEADINIT1)
; sts leadosc2 + 1, r18
; ldi r18, hi8(LEADINIT2)
; sts leadosc3, r18
; ldi r18, lo8(LEADINIT2)
; sts leadosc3 + 1, r18
ldi r18, hi8(LEADINIT1)
sts lead2 + 2, r18
ldi r18, lo8(LEADINIT1)
sts lead2 + 3, r18
ldi r18, hi8(LEADINIT2)
sts lead3 + 2, r18
ldi r18, lo8(LEADINIT2)
sts lead3 + 3, r18
out CCP, r17
out CLKPSR, r16
@ -94,19 +93,24 @@ clear_sram:
sei
out TIFR0, r17
; YH and ZH never change
ldi r31, hi8(bassline+0x4000)
clr r29
; init i
ldi r17, 3
ldi r18, 0xF0
clr r19
mainloop:
sleep
clr r16
lds r17, int_ctr
tst r17
lds r20, int_ctr
tst r20
brne mainloop
sbi PORTB, 2
lds r17, i
lds r18, i+1
lds r19, i+2
subi r19, 0xff
sbci r18, 0xff
sbci r17, 0xff
@ -123,9 +127,7 @@ mainloop:
clr r18
norestart:
sts i, r17
sts i+1, r18
sts i+2, r19
;rjmp noarp
; ==== BASS ====
; bassptr(r20) = (i >> 13) & 0xF
@ -141,7 +143,6 @@ norestart:
ori r20, 0x10
; note = notes[bassline[bassptr]]
ldi r31, hi8(bassline+0x4000)
ldi r30, lo8(bassline)
add r30, r20
ld r20, Z
@ -185,7 +186,7 @@ nobassbeat:
andi r22, 0x7F
add r24, r22
; if ((i >> 6) & 0xF) == 0xF: sample += (bass >> 2)
; if !((i >> 6) & 0xF) == 0xF: sample += (bass >> 2)
lsr r24
lsr r24
mov r20, r18
@ -284,30 +285,29 @@ arptiming_noshift:
noarp:
; ==== LEAD ===
clr r29
ldi r28, lead1
ldi r24, 0
ldi r25, ~1
rcall lead_voice
mov r16, r23
add r16, r23
;ldi r28, lead2
;ldi r24, 4
;ldi r25, ~2
;rcall lead_voice
;lsr r23
;lsr r23
;add r16, r23
;lsr r23
;add r16, r23
ldi r28, lead2
ldi r24, 4
ldi r25, ~2
rcall lead_voice
lsr r23
lsr r23
add r16, r23
lsr r23
add r16, r23
;ldi r28, lead3
;ldi r24, 8
;ldi r25, ~4
;rcall lead_voice
;lsr r23
;lsr r23
;add r16, r23
ldi r28, lead3
ldi r24, 8
ldi r25, ~4
rcall lead_voice
lsr r23
lsr r23
add r16, r23
out OCR0AL, r16
@ -386,7 +386,7 @@ getleaddata:
ld r24, Z ; r24 = data!
; if (0 == leadtimer) {
neg r25
com r25
tst r27
brne noleadupdate
@ -435,10 +435,10 @@ noleadupdate:
and r26, r25
brne noreduce
lsr r23
mov r22, r23
lsr r23
add r23, r22
; lsr r23
; mov r22, r23
; lsr r23
; add r23, r22
noreduce:
; if (data == 0) return 0;