133 lines
1.7 KiB
ArmAsm
133 lines
1.7 KiB
ArmAsm
; VMW Productions DHIRES/ZX02 image viewer
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;
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; by deater (Vince Weaver) <vince@deater.net>
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; todo help menu, timed slideshow mode
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; move to being a bootsector
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.include "zp.inc"
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.include "hardware.inc"
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WHICH = $E0
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hires_start:
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;===================
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; Init RTS disk code
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;===================
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jsr rts_init
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;===================
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; set graphics mode
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;===================
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jsr HOME
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bit SET_GR
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bit HIRES
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bit FULLGR
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sta AN3 ; set double hires
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sta EIGHTYCOLON ; 80 column
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sta SET80COL ; 80 store
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bit PAGE1 ; start in page1
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lda #0
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sta WHICH
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;===================
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; Load graphics
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;===================
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load_loop:
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;=============================
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ldx WHICH
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lda bin_filenames_low,X
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sta OUTL
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lda bin_filenames_high,X
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sta OUTH
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lda aux_filenames_low,X
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sta INL
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lda aux_filenames_high,X
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sta INH
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jsr load_image
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wait_until_keypress:
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lda KEYPRESS ; 4
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bpl wait_until_keypress ; 3
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bit KEYRESET ; clear the keyboard buffer
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cmp #$88 ; left button
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bne inc_which
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dec WHICH
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bpl which_ok
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ldx #(MAX_FILES-1)
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bne store_which ; bra
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inc_which:
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inc WHICH
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ldx WHICH
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cpx #MAX_FILES
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bcc which_ok ; blt
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ldx #0
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store_which:
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stx WHICH
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which_ok:
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jmp load_loop
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;==========================
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; Load Image
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;===========================
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load_image:
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bit PAGE1
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jsr opendir_filename ; open and read entire file into memory
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lda #<$A000
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sta zx_src_l+1
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lda #>$A000
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sta zx_src_h+1
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lda #$20
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jsr zx02_full_decomp
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; auxiliary part
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lda INL
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sta OUTL
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lda INH
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sta OUTH
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jsr opendir_filename ; open and read entire file into memory
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bit PAGE2
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lda #<$A000
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sta zx_src_l+1
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lda #>$A000
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sta zx_src_h+1
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lda #$20
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jsr zx02_full_decomp
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rts
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.include "zx02_optim.s"
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.include "rts.s"
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;
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