mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-12-29 00:31:52 +00:00
134 lines
2.3 KiB
ArmAsm
134 lines
2.3 KiB
ArmAsm
;=============================
|
|
; decently fast hlin routines
|
|
;=============================
|
|
; can also be used to print repeated text if desperate
|
|
|
|
|
|
|
|
;================================
|
|
; hlin_double:
|
|
;================================
|
|
; HLIN Y, V2 AT A
|
|
; color in COLOR
|
|
; GBASL/GBASH set to proper address
|
|
; A, Y trashed
|
|
; at end Y points to end of line
|
|
|
|
hlin_double:
|
|
|
|
inc V2 ; drawing inclusive
|
|
|
|
sty TEMPY ; 3
|
|
and #$fe ; make even ; 2
|
|
tay ; y=A ; 2
|
|
lda gr_offsets,Y ; lookup low-res memory address ; 4
|
|
sta GBASL ; 3
|
|
clc ; 2
|
|
lda gr_offsets+1,Y ; 4
|
|
adc DRAW_PAGE ; add in draw page offset ; 3
|
|
sta GBASH ; 3
|
|
;===========
|
|
; 26
|
|
|
|
lda COLOR ; 3
|
|
ldy TEMPY ; restore ; 3
|
|
hlin_double_loop:
|
|
sta (GBASL),Y ; 6
|
|
iny ; 2
|
|
cpy V2 ; 3
|
|
bne hlin_double_loop ; 2nt/3
|
|
|
|
rts ; 6
|
|
|
|
|
|
;=================================
|
|
; hlin_double_continue: width
|
|
;=================================
|
|
; GBASL has correct offset for row/col
|
|
; V2=start, width in X
|
|
; A, X, Y trashed
|
|
; V2=xcoord at end
|
|
|
|
hlin_double_continue:
|
|
|
|
txa
|
|
clc
|
|
adc V2
|
|
sta V2
|
|
lda COLOR ; 3
|
|
hlin_double_continue_loop:
|
|
sta (GBASL),Y ; 6
|
|
iny ; 2
|
|
cpy V2
|
|
bne hlin_double_continue_loop ; 2nt/3
|
|
|
|
rts ; 6
|
|
;=============
|
|
|
|
|
|
;================================
|
|
; hlin_single:
|
|
;================================
|
|
; HLIN Y, V2 AT A
|
|
; color in COLOR
|
|
; GBASL/GBASH set to proper address
|
|
; A, Y trashed
|
|
; at end Y points to end of line
|
|
; Y, X, A trashed
|
|
hlin_single:
|
|
|
|
inc V2 ; drawing inclusive
|
|
|
|
sty TEMPY ; 3
|
|
and #$fe ; make even ; 2
|
|
php ; save if zero ; 2
|
|
tay ; y=A ; 2
|
|
lda gr_offsets,Y ; lookup low-res memory address ; 4
|
|
sta GBASL ; 3
|
|
clc ; 2
|
|
lda gr_offsets+1,Y ; 4
|
|
adc DRAW_PAGE ; add in draw page offset ; 3
|
|
sta GBASH ; 3
|
|
;===========
|
|
; 28
|
|
|
|
|
|
plp ; restore if 0
|
|
beq hlin_single_bottom
|
|
|
|
|
|
hlin_single_top:
|
|
lda COLOR
|
|
and #$f0
|
|
sta COLOR
|
|
|
|
ldy TEMPY
|
|
hlin_single_top_loop:
|
|
lda (GBASL),Y
|
|
and #$0f
|
|
ora COLOR
|
|
sta (GBASL),Y
|
|
iny
|
|
cpy V2
|
|
bne hlin_single_top_loop
|
|
|
|
rts
|
|
|
|
hlin_single_bottom:
|
|
|
|
lda COLOR
|
|
and #$0f
|
|
sta COLOR
|
|
|
|
ldy TEMPY
|
|
hlin_single_bottom_loop:
|
|
lda (GBASL),Y
|
|
and #$f0
|
|
sta (GBASL),Y
|
|
iny
|
|
cpy V2
|
|
bne hlin_single_bottom_loop
|
|
|
|
rts
|
|
|