345 lines
5.0 KiB
ArmAsm
345 lines
5.0 KiB
ArmAsm
;====================================
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;====================================
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; update bottom of screen
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;====================================
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;====================================
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update_bottom:
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jsr normal_text
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jsr clear_bottom
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lda LOCATION
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cmp #MONKEY_MAP
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bne not_the_map
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;===================================
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; draw map footer
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; you don't have actions on the map?
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;===================================
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map_noun:
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lda VALID_NOUN
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beq done_map_noun
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lda NOUN_L
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sta OUTL
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lda NOUN_H
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sta OUTH
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jsr move_and_print
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done_map_noun:
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rts
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not_the_map:
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;===========================================================
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; if footer is disable and instead we are printing a message
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; then print the message
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;===========================================================
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lda DISPLAY_MESSAGE
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beq no_message
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lda MESSAGE_L
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sta OUTL
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lda MESSAGE_H
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sta OUTH
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jsr move_and_print
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rts
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no_message:
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;===============================================
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; draw the standard footer
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;===============================================
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; draw first line
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; it's verb followed by noun
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; we go through a lot of trouble to center it
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; text is not inverse
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jsr normal_text
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; first clear line
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lda #<clear_line
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sta OUTL
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lda #>clear_line
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sta OUTH
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jsr move_and_print
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; set up temp line
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; already here as we're immediately after clear line?
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lda #<(temp_line+2)
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sta OUTL
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lda #>(temp_line+2)
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sta OUTH
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; concatenate verb
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lda CURRENT_VERB
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asl
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tay
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lda verb_names,Y
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sta INL
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lda verb_names+1,Y
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sta INH
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jsr strcat
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; concatenate noun if applicable
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lda VALID_NOUN
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beq no_noun
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lda NOUN_L
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sta INL
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lda NOUN_H
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sta INH
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jsr strcat
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no_noun:
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; stick zero at end
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; lda #0
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; tay
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; sta (OUTL),Y
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; center it
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lda #<(temp_line+2)
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sta INL
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lda #>(temp_line+2)
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sta INH
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jsr strlen
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sty temp_line
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lda #40
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sec
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sbc temp_line
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lsr
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sta temp_line
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; now print it
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lda #<temp_line
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sta OUTL
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lda #>temp_line
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sta OUTH
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jsr move_and_print
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;========================
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; draw command bars
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draw_command_bars:
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jsr inverse_text
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ldx #0
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bottom_loop:
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lda bottom_strings,X
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sta OUTL
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lda bottom_strings+1,X
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sta OUTH
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jsr move_and_print
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inx
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inx
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cpx #18
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bne bottom_loop
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;======================================
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; draw inventory
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; draw /\
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; draw ::
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; draw \/
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lda #<inv_up
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sta OUTL
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lda #>inv_up
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sta OUTH
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jsr move_and_print
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jsr move_and_print
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jsr normal_text
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jsr move_and_print
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;==============================
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; print inventory, if any
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lda INVENTORY
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beq done_inventory
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asl
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tay
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lda inventory_names,Y
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sta INL
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lda inventory_names+1,Y
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sta INH
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lda #<(temp_inv+2)
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sta OUTL
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lda #>(temp_inv+2)
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sta OUTH
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jsr strcat
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lda #<(temp_inv)
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sta OUTL
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lda #>(temp_inv)
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sta OUTH
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lda #21
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sta temp_inv+1
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jsr move_and_print
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lda INVENTORY2
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beq done_inventory
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asl
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tay
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lda inventory_names,Y
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sta INL
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lda inventory_names+1,Y
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sta INH
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lda #<(temp_inv+2)
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sta OUTL
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lda #>(temp_inv+2)
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sta OUTH
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jsr strcat
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lda #<(temp_inv)
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sta OUTL
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lda #>(temp_inv)
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sta OUTH
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lda #22
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sta temp_inv+1
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jsr move_and_print
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done_inventory:
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rts
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inventory_names:
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.word null_string ; NULL
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.word meat_string ; HUNK OF MEAT
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.word chicken_pulley_string ; CHICKEN PULLEY
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inv_up: .byte 22,21,"/\",0
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inv_down: .byte 22,23,"\/",0
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inv_middle: .byte 22,22,"::",0
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temp_inv:
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.byte 25,0," ",0
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;0123456789012345678901234567890123456789
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;
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;GIVE PICK UP USE /\ HUNK O' MEAT
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;OPEN LOOK AT PUSH :: CHICKEN PULLEY
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;CLOSE TALK TO PULL \/
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bottom_strings:
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.word bottom_give
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.word bottom_open
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.word bottom_close
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.word bottom_pick_up
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.word bottom_look_at
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.word bottom_talk_to
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.word bottom_use
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.word bottom_push
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.word bottom_pull
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bottom_give: .byte 0,21,"GIVE ",0
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bottom_open: .byte 0,22,"OPEN ",0
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bottom_close: .byte 0,23,"CLOSE",0
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bottom_pick_up: .byte 6,21,"PICK UP",0
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bottom_look_at: .byte 6,22,"LOOK AT",0
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bottom_talk_to: .byte 6,23,"TALK TO",0
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bottom_use: .byte 15,21,"USE ",0
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bottom_push: .byte 15,22,"PUSH",0
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bottom_pull: .byte 15,23,"PULL",0
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verb_names:
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.word verb_give
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.word verb_open
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.word verb_close
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.word verb_pick_up
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.word verb_look_at
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.word verb_talk_to
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.word verb_use
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.word verb_push
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.word verb_pull
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.word verb_walk
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verb_give: .byte "GIVE ",0
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verb_open: .byte "OPEN ",0
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verb_close: .byte "CLOSE ",0
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verb_pick_up: .byte "PICK UP ",0
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verb_look_at: .byte "LOOK AT ",0
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verb_talk_to: .byte "TALK TO ",0
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verb_use: .byte "USE ",0
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verb_push: .byte "PUSH ",0
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verb_pull: .byte "PULL ",0
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verb_walk: .byte "WALK TO ",0
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clear_line: .byte 0,20," ",0
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temp_line: .byte 0,20," ",0
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;====================================
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; concatenate (INL) to end of (OUTL)
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; update (OUTL) to point to end when done
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strcat:
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ldy #0
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strcat_loop:
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lda (INL),Y
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beq strcat_done
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sta (OUTL),Y
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iny
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bne strcat_loop
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strcat_done:
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tya
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clc
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adc OUTL
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sta OUTL
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lda #0
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adc OUTH
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sta OUTH
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lda #0
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tay
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sta (OUTL),Y ; NUL terminate
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rts
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;====================================
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; calculate length of string in (INL)
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; returns value in Y
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strlen:
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ldy #0
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strlen_loop:
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lda (INL),Y
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beq strlen_done
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iny
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bne strlen_loop
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strlen_done:
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rts
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