206 lines
2.7 KiB
ArmAsm
206 lines
2.7 KiB
ArmAsm
loadsave_addr_load = $a00 ; was $e00
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loadsave_addr_save = $900 ; was $d00
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;===================================
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;===================================
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; load the game
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;===================================
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;===================================
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load_game:
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lda #<load_message
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sta OUTL
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lda #>load_message
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sta OUTH
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jsr confirm_slot
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bcs done_load
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; actually load it
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clc
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adc #LOAD_SAVE1
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sta WHICH_LOAD
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jsr load_file
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; copy to zero page
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ldx #0
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load_loop:
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lda loadsave_addr_load,X
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sta WHICH_LOAD,X
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inx
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cpx #(END_OF_SAVE-WHICH_LOAD+1)
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bne load_loop
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lda #$ff
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sta LEVEL_OVER
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done_load:
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bit SET_GR ; turn graphics back on
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rts
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;===================================
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;===================================
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; save the game
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;===================================
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;===================================
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save_game:
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lda #<save_message
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sta OUTL
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lda #>save_message
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sta OUTH
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jsr confirm_slot
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bcs done_save
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pha
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;========================
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; actually save
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actually_save:
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;===============================
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; first load something from
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; disk1/track0 to seek the head there
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lda WHICH_LOAD
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pha
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lda #LOAD_SAVE1
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sta WHICH_LOAD
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jsr load_file
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pla
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sta WHICH_LOAD
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; copy save data to $900
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ldx #0
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copy_loop:
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lda WHICH_LOAD,X
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sta loadsave_addr_save,X
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inx
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cpx #(END_OF_SAVE-WHICH_LOAD+1)
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bne copy_loop
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; spin up disk
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jsr driveon
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; actually save it
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pla
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clc
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adc #11
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sta requested_sector+1
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jsr sector_write
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jsr driveoff
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done_save:
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jsr change_location ; restore graphics
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rts
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;================================
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; confirm and get slot number
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;================================
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; call with first message in OUTL/OUTH
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; return: carry set if skipping
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confirm_slot:
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bit KEYRESET ; clear keyboard buffer
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;===============================
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; print "are you sure" message
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bit SET_TEXT ; set text mode
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lda #' '|$80
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sta clear_all_color+1
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jsr clear_all ; clear screen
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jsr move_and_print
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lda #<are_you_sure
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sta OUTL
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lda #>are_you_sure
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sta OUTH
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jsr move_and_print
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; jsr page_flip
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wait_confirmation:
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lda KEYPRESS
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bpl wait_confirmation
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bit KEYRESET ; clear keypress
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and #$7f
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cmp #'Y'
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bne dont_do_it
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;===============================
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; print "Which one?"
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jsr clear_all ; clear screen
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lda #<which_message
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sta OUTL
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lda #>which_message
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sta OUTH
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jsr move_and_print
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; jsr page_flip
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which_slot:
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lda KEYPRESS
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bpl which_slot
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bit KEYRESET ; clear keypress
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and #$7f
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sec
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sbc #'1'
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bmi dont_do_it
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cmp #5
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bcs dont_do_it
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clc
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rts
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dont_do_it:
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sec
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rts
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which_message:
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.byte 9,5,"WHICH SLOT (1-5)?",0
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load_message:
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.byte 10,5,"LOAD GAME FROM DISK",0
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save_message:
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.byte 11,5,"SAVE GAME TO DISK",0
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are_you_sure:
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.byte 10,7,"ARE YOU SURE? (Y/N)",0
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;save_filename:
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;.byte "SAVE0",0
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