202 lines
2.9 KiB
ArmAsm
202 lines
2.9 KiB
ArmAsm
;================================
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; Clear screen and setup graphics
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;================================
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jsr SETGR ; set lo-res 40x40 mode
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bit LORES
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sta FULLGR
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;====================================================
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; setup text page2 screen of "Apple II Forever" text
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;====================================================
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; there are much better ways to accomplish this
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sta SETMOUSETEXT
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ldy #0
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ldx #0
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sty XX
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a24e_newy:
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lda gr_offsets_l,Y
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sta stringing_smc+1
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lda gr_offsets_h,Y
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clc
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adc #4
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sta stringing_smc+2
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a24e_loop:
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lda a2_string,X
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bne keep_stringing
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ldx #0
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lda a2_string,X
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keep_stringing:
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inx
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eor #$80
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stringing_smc:
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sta $d000
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inc stringing_smc+1
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inc XX
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lda XX
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cmp #40
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bne a24e_loop
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lda #0
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sta XX
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iny
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cpy #24
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bne a24e_newy
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stringing_done:
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; set 80-store mode
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sta EIGHTYSTOREON ; PAGE2 selects AUX memory
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;=========================================================
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; load double lo-res image to $C00 and copy to MAIN:PAGE1
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;=========================================================
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bit PAGE1
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lda #<image_dgr_main
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sta ZX0_src
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lda #>image_dgr_main
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sta ZX0_src+1
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lda #$0c
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jsr full_decomp
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jsr copy_to_400
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;=========================================================
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; load double lo-res image to $C00 and copy to AUX:PAGE1
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;=========================================================
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bit PAGE2 ; map in AUX (80store)
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lda #<image_dgr_aux
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sta ZX0_src
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lda #>image_dgr_aux
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sta ZX0_src+1
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lda #$0c
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jsr full_decomp
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jsr copy_to_400
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;=======================================
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; load double hi-res image to MAIN:PAGE1
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;=======================================
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bit HIRES ; need to do this for 80store to work
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bit PAGE1
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lda #<image_dhgr_bin
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sta ZX0_src
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lda #>image_dhgr_bin
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sta ZX0_src+1
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lda #$20
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jsr full_decomp
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;=======================================
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; load double hi-res image to AUX:PAGE1
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;=======================================
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bit PAGE2 ; map in AUX (80store)
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lda #<image_dhgr_aux
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sta ZX0_src
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lda #>image_dhgr_aux
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sta ZX0_src+1
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lda #$20
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jsr full_decomp
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;=================================
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; load hi-res image to MAIN:PAGE2
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;=================================
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; turn off eightystore
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sta EIGHTYSTOREOFF
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lda #<image_hgr
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sta ZX0_src
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lda #>image_hgr
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sta ZX0_src+1
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lda #$40
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jsr full_decomp
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;========================================
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; Put message in 80-column top of screen
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;========================================
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ldx #40
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eloop:
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lda #' '+$80
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sta $800,X ; line 0
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; sta $880,X ; line 1
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; sta $900,X ; line 2
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dex
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bpl eloop
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ldx #0
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floop:
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lda top_string_main,X
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beq done_floop
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ora #$80
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sta $800,X
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inx
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bne floop
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done_floop:
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; turn on write to AUX
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sta WRAUXRAM
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ldx #40
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eloop2:
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lda #' '+$80
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sta $800,X ; line 0
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sta $880,X ; line 1
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sta $900,X ; line 2
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dex
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bpl eloop2
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ldx #0
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floop2:
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lda top_string_aux,X
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beq done_floop2
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ora #$80
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sta $800,X
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inx
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bne floop2
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done_floop2:
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; turn on write to MAIN
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sta WRMAINRAM
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