Apple-2-SW/dos33fsprogs
1
0
Fork 0
mirror of https://github.com/deater/dos33fsprogs.git synced 2024-07-04 08:29:30 +00:00
Code Issues Projects Releases Wiki Activity

mode7: unoptimize the mockingboard playing

Browse Source
This commit is contained in:
Vince Weaver 2018-03-19 01:10:38 -04:00
parent 61e4ae51e3
commit d5686d153f
2 changed files with 50 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
mode7_demo/interrupt_handler.s
View File

@ -53,49 +53,74 @@ mb_play_music:
mb_write_frame:
ldx #0 ; set up reg count ; 2
;============
; 2
;==================================
; loop through the 11 registers
; reading the value, then write out
;==================================
ldx #0 ; set up reg count ; 2
mb_write_loop:
mb_write_loop_left:
lda REGISTER_DUMP,X ; load register value ; 4
cmp REGISTER_OLD,X ; compare with old values ; 4
beq mb_no_write ; 3/2nt
beq mb_no_write_left ; 3/2nt
;=============
; typ 11
; address
stx MOCK_6522_ORA1 ; put address on PA1 ; 4
stx MOCK_6522_ORA2 ; put address on PA2 ; 4
lda #MOCK_AY_LATCH_ADDR ; latch_address for PB1 ; 2
sta MOCK_6522_ORB1 ; latch_address on PB1 ; 4
sta MOCK_6522_ORB2 ; latch_address on PB2 ; 4
lda #MOCK_AY_INACTIVE ; go inactive ; 2
sta MOCK_6522_ORB1 ; 4
sta MOCK_6522_ORB2 ; 4
; value
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
;===========
; 36
mb_no_write_left:
inx ; point to next register ; 2
cpx #11 ; if 11 we're done ; 2
bmi mb_write_loop_left ; otherwise, loop ; 3/2nt
;============
; 7
ldx #0 ; set up reg count ; 2
mb_write_loop_right:
lda REGISTER_DUMP,X ; load register value ; 4
cmp REGISTER_OLD,X ; compare with old values ; 4
beq mb_no_write_right ; 3/2nt
;=============
; typ 11
; address
stx MOCK_6522_ORA2 ; put address on PA2 ; 4
lda #MOCK_AY_LATCH_ADDR ; latch_address for PB1 ; 2
sta MOCK_6522_ORB2 ; latch_address on PB2 ; 4
lda #MOCK_AY_INACTIVE ; go inactive ; 2
sta MOCK_6522_ORB2 ; 4
; value
lda REGISTER_DUMP,X ; load register value ; 4
sta MOCK_6522_ORA2 ; put value on PA2 ; 4
lda #MOCK_AY_WRITE ; ; 2
sta MOCK_6522_ORB2 ; write on PB2 ; 4
lda #MOCK_AY_INACTIVE ; go inactive ; 2
sta MOCK_6522_ORB2 ; 4
;===========
; 62
mb_no_write:
; 36
mb_no_write_right:
inx ; point to next register ; 2
cpx #11 ; if 11 we're done ; 2
bmi mb_write_loop ; otherwise, loop ; 3/2nt
bmi mb_write_loop_right ; otherwise, loop ; 3/2nt
;============
; 7

12
mode7_demo/vmw_logo.inc
View File

@ -29,3 +29,15 @@
; Note: each byte, values stored LSB first (legend says woz saved 2 chips)
; $2000, $2400, $2800, $2C00, $3000, $3400, $3800, $3C00
XXX X X XX XX X X XXX XXX XXX XX X X XXX XXX XXX XXX XXX
XXX X X X X X X X X XXX X X X X X X X X X X X X X X
X X X X X XX XX X X XXX XX XXX XXX X XXX XXX X X
0 ! 2 ! 4 ! 6 ! 7 ! 10 ! 12 ! 14 ! 16 !
* 11 11 11 0 * 0 00 11 00 * 11 00 11 1 * 1 00 11 11 *
* 11 11 11 0 * 0 00 11 00 * 11 00 11 0 * 0 11 00 11 *
* 11 00 11 0 * 0 00 00 11 * 00 00 11 0 * 0 00 00 11 *
.byte $bf,$98,
.byte $bf,$98
.byte $b3,$e0