mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-11-01 01:06:33 +00:00
50 lines
839 B
ArmAsm
50 lines
839 B
ArmAsm
;=========================================================
|
|
; hgr copy from page in A to current DRAW_PAGE
|
|
;=========================================================
|
|
|
|
; would be faster if we unroll it, but much bigger
|
|
|
|
; old numbers
|
|
|
|
; 14+ ((14*256)+20)*32 + 5 = 115347 = 8.6fps
|
|
|
|
; theoretical unrolled, 30*6 bytes bigger (180 bytes?)
|
|
; 2 + ((9*32)+5)*256 + 5 = 75015 = 13.3 fps
|
|
|
|
hgr_copy_fast:
|
|
; copy from in A
|
|
|
|
sta hgr_copy_smc+2 ; 4
|
|
clc
|
|
adc #$20
|
|
sta hgr_copy_end_smc+1
|
|
|
|
ldx #0 ; 2
|
|
|
|
lda DRAW_PAGE
|
|
clc
|
|
adc #$20
|
|
sta hgr_copy_smc+5 ; 4
|
|
|
|
hgr_copy_column:
|
|
|
|
hgr_copy_smc:
|
|
lda $8000,X ; 4
|
|
sta $2000,X ; 5
|
|
|
|
dex ; 2
|
|
bne hgr_copy_column ; 2nt/3t
|
|
|
|
|
|
|
|
inc hgr_copy_smc+2 ; 6
|
|
inc hgr_copy_smc+5 ; 6
|
|
|
|
lda hgr_copy_smc+2 ; 4
|
|
hgr_copy_end_smc:
|
|
cmp #$C0 ; 2
|
|
bne hgr_copy_column ; 2/3
|
|
|
|
rts ; 6
|
|
|