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PASS2.DAT
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LABEL-
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-; port id's of picoblaze input/output devices
LABEL-
INSTRUCTION-CONSTANT
OPERAND1-column_port_id
OPERAND2-00
COMMENT-
LABEL-
INSTRUCTION-CONSTANT
OPERAND1-row_port_id
OPERAND2-01
COMMENT-
LABEL-
INSTRUCTION-CONSTANT
OPERAND1-data_port_id
OPERAND2-02
COMMENT-
LABEL-
INSTRUCTION-CONSTANT
OPERAND1-ps2_port_id
OPERAND2-03
COMMENT-
LABEL-
INSTRUCTION-CONSTANT
OPERAND1-rand_port_id
OPERAND2-04
COMMENT-
LABEL-
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-; ps2 keycodes
LABEL-
INSTRUCTION-CONSTANT
OPERAND1-keycode_left
OPERAND2-6B
COMMENT-
LABEL-
INSTRUCTION-CONSTANT
OPERAND1-keycode_right
OPERAND2-74
COMMENT-
LABEL-
INSTRUCTION-CONSTANT
OPERAND1-keycode_up
OPERAND2-75
COMMENT-
LABEL-
INSTRUCTION-CONSTANT
OPERAND1-keycode_down
OPERAND2-72
COMMENT-
LABEL-
INSTRUCTION-CONSTANT
OPERAND1-keycode_enter
OPERAND2-5A
COMMENT-
LABEL-
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-; game constants
LABEL-
INSTRUCTION-CONSTANT
OPERAND1-init_snake_len
OPERAND2-02
COMMENT-
LABEL-
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-; register aliases
LABEL-
INSTRUCTION-NAMEREG
OPERAND1-sA
OPERAND2-reg_fb_col
COMMENT-
LABEL-
INSTRUCTION-NAMEREG
OPERAND1-sB
OPERAND2-reg_fb_row
COMMENT-
LABEL-
INSTRUCTION-NAMEREG
OPERAND1-sC
OPERAND2-reg_fb_data
COMMENT-
LABEL-
INSTRUCTION-NAMEREG
OPERAND1-sD
OPERAND2-reg_ps2_data
COMMENT-
LABEL-
INSTRUCTION-NAMEREG
OPERAND1-sE
OPERAND2-reg_counter1
COMMENT-
LABEL-
INSTRUCTION-NAMEREG
OPERAND1-sF
OPERAND2-reg_score
COMMENT-
LABEL-
INSTRUCTION-NAMEREG
OPERAND1-s9
OPERAND2-reg_isfood
COMMENT-
LABEL-
INSTRUCTION-NAMEREG
OPERAND1-s8
OPERAND2-reg_snake_direction
COMMENT-
LABEL-
INSTRUCTION-NAMEREG
OPERAND1-s7
OPERAND2-reg_snake_len
COMMENT-
LABEL-
INSTRUCTION-NAMEREG
OPERAND1-s6
OPERAND2-reg_snake_head_row
COMMENT-
LABEL-
INSTRUCTION-NAMEREG
OPERAND1-s5
OPERAND2-reg_snake_head_col
COMMENT-
LABEL-
INSTRUCTION-NAMEREG
OPERAND1-s4
OPERAND2-reg_snake_tail_row
COMMENT-
LABEL-
INSTRUCTION-NAMEREG
OPERAND1-s3
OPERAND2-reg_snake_tail_col
COMMENT-
LABEL-
INSTRUCTION-NAMEREG
OPERAND1-s2
OPERAND2-reg_ram_index_head
COMMENT-; head writes the direction its going to this address
LABEL-
INSTRUCTION-NAMEREG
OPERAND1-s1
OPERAND2-reg_ram_index_tail
COMMENT-; tail takes the direction and erases
LABEL-
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-; reset vector - at address 0, program always starts here
LABEL-
INSTRUCTION-ADDRESS
OPERAND1-000
OPERAND2-
COMMENT-
LABEL-start_game
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-CALL
OPERAND1-clear_fb
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-CALL
OPERAND1-load_food
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-CALL
OPERAND1-init_snake
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-ENABLE
OPERAND1-INTERRUPT
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-; infinite loop until the game is lost
LABEL-main_game
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_isfood
OPERAND2-00
COMMENT-; clear register that tell us whether the pixel is a food pixel
LABEL-
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-; head insertion
LABEL-
INSTRUCTION-COMPARE
OPERAND1-reg_snake_direction
OPERAND2-keycode_left
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-Z
OPERAND2-add_to_snake_left
COMMENT-
LABEL-
INSTRUCTION-COMPARE
OPERAND1-reg_snake_direction
OPERAND2-keycode_right
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-Z
OPERAND2-add_to_snake_right
COMMENT-
LABEL-
INSTRUCTION-COMPARE
OPERAND1-reg_snake_direction
OPERAND2-keycode_up
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-Z
OPERAND2-add_to_snake_up
COMMENT-
LABEL-
INSTRUCTION-COMPARE
OPERAND1-reg_snake_direction
OPERAND2-keycode_down
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-Z
OPERAND2-add_to_snake_down
COMMENT-
LABEL-add_to_snake_left
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-SUB
OPERAND1-reg_snake_head_col
OPERAND2-01
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-cont
OPERAND2-
COMMENT-
LABEL-add_to_snake_right
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-ADD
OPERAND1-reg_snake_head_col
OPERAND2-01
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-cont
OPERAND2-
COMMENT-
LABEL-add_to_snake_up
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-SUB
OPERAND1-reg_snake_head_row
OPERAND2-01
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-cont
OPERAND2-
COMMENT-
LABEL-add_to_snake_down
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-ADD
OPERAND1-reg_snake_head_row
OPERAND2-01
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-cont
OPERAND2-
COMMENT-
LABEL-cont
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_fb_col
OPERAND2-reg_snake_head_col
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_fb_row
OPERAND2-reg_snake_head_row
COMMENT-
LABEL-
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-; check if within the bounds of our screen
LABEL-
INSTRUCTION-LOAD
OPERAND1-s0
OPERAND2-reg_fb_row
COMMENT-
LABEL-
INSTRUCTION-AND
OPERAND1-s0
OPERAND2-20
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-NZ
OPERAND2-end_game
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-s0
OPERAND2-reg_fb_col
COMMENT-
LABEL-
INSTRUCTION-SUB
OPERAND1-s0
OPERAND2-28
COMMENT-
LABEL-
INSTRUCTION-COMPARE
OPERAND1-s0
OPERAND2-00
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-Z
OPERAND2-end_game
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-s0
OPERAND2-reg_fb_col
COMMENT-
LABEL-
INSTRUCTION-AND
OPERAND1-s0
OPERAND2-40
COMMENT-
LABEL-
INSTRUCTION-COMPARE
OPERAND1-s0
OPERAND2-00
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-NZ
OPERAND2-end_game
COMMENT-
LABEL-
INSTRUCTION-CALL
OPERAND1-fb_read
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-COMPARE
OPERAND1-reg_fb_data
OPERAND2-02
COMMENT-; is read pixel a food pixel?
LABEL-
INSTRUCTION-JUMP
OPERAND1-NZ
OPERAND2-cont2
COMMENT-
LABEL-
INSTRUCTION-ADD
OPERAND1-reg_score
OPERAND2-01
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_isfood
OPERAND2-01
COMMENT-
LABEL-cont2
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-COMPARE
OPERAND1-reg_fb_data
OPERAND2-01
COMMENT-; is read pixel snake?
LABEL-
INSTRUCTION-JUMP
OPERAND1-NZ
OPERAND2-cont4
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-end_game
OPERAND2-
COMMENT-; end game
LABEL-cont4
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_fb_data
OPERAND2-01
COMMENT-; code for snake pixel is 01
LABEL-
INSTRUCTION-CALL
OPERAND1-fb_insert
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-STORE
OPERAND1-reg_snake_direction
OPERAND2-(reg_ram_index_head)
COMMENT-; store the direction we went into scratchpad ram
LABEL-
INSTRUCTION-ADD
OPERAND1-reg_ram_index_head
OPERAND2-01
COMMENT-
LABEL-
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-; tail removal
LABEL-
INSTRUCTION-COMPARE
OPERAND1-reg_isfood
OPERAND2-01
COMMENT-; if we ate food, don't remove anything
LABEL-
INSTRUCTION-JUMP
OPERAND1-Z
OPERAND2-cont3
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_fb_col
OPERAND2-reg_snake_tail_col
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_fb_row
OPERAND2-reg_snake_tail_row
COMMENT-
LABEL-
INSTRUCTION-CALL
OPERAND1-fb_remove
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-FETCH
OPERAND1-s0
OPERAND2-(reg_ram_index_tail)
COMMENT-; fetch direction to remove next from rom
LABEL-
INSTRUCTION-ADD
OPERAND1-reg_ram_index_tail
OPERAND2-01
COMMENT-
LABEL-
INSTRUCTION-COMPARE
OPERAND1-s0
OPERAND2-keycode_left
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-Z
OPERAND2-remove_from_snake_left
COMMENT-
LABEL-
INSTRUCTION-COMPARE
OPERAND1-s0
OPERAND2-keycode_right
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-Z
OPERAND2-remove_from_snake_right
COMMENT-
LABEL-
INSTRUCTION-COMPARE
OPERAND1-s0
OPERAND2-keycode_up
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-Z
OPERAND2-remove_from_snake_up
COMMENT-
LABEL-
INSTRUCTION-COMPARE
OPERAND1-s0
OPERAND2-keycode_down
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-Z
OPERAND2-remove_from_snake_down
COMMENT-
LABEL-remove_from_snake_left
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-SUB
OPERAND1-reg_snake_tail_col
OPERAND2-01
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-cont1
OPERAND2-
COMMENT-
LABEL-remove_from_snake_right
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-ADD
OPERAND1-reg_snake_tail_col
OPERAND2-01
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-cont1
OPERAND2-
COMMENT-
LABEL-remove_from_snake_up
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-SUB
OPERAND1-reg_snake_tail_row
OPERAND2-01
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-cont1
OPERAND2-
COMMENT-
LABEL-remove_from_snake_down
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-ADD
OPERAND1-reg_snake_tail_row
OPERAND2-01
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-cont1
OPERAND2-
COMMENT-
LABEL-cont1
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-cont3
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-; randomly add food (or not add)
LABEL-
INSTRUCTION-INPUT
OPERAND1-reg_isfood
OPERAND2-rand_port_id
COMMENT-
LABEL-
INSTRUCTION-COMPARE
OPERAND1-reg_isfood
OPERAND2-07
COMMENT-; compare with 10 (dec), because a third of the time the input will be smaller (random number from 0-30)
LABEL-
INSTRUCTION-JUMP
OPERAND1-C
OPERAND2-cont5
COMMENT-
LABEL-
INSTRUCTION-CALL
OPERAND1-food_insert
OPERAND2-
COMMENT-
LABEL-cont5
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-OUTPUT
OPERAND1-reg_score
OPERAND2-ps2_port_id
COMMENT-
LABEL-
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-; output score
LABEL-
INSTRUCTION-CALL
OPERAND1-delay
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-main_game
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-; routine that clears the screen and waits for input - enter for another game
LABEL-end_game
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-CALL
OPERAND1-clear_fb
OPERAND2-
COMMENT-
LABEL-another_game
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-COMPARE
OPERAND1-reg_ps2_data
OPERAND2-keycode_enter
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-Z
OPERAND2-start_game
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-NZ
OPERAND2-another_game
COMMENT-
LABEL-
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-; 1s delay
LABEL-delay
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-s0
OPERAND2-FF
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_isfood
OPERAND2-FF
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_counter1
OPERAND2-40
COMMENT-; 7f - 128 (1s) ; 40 - 64 (0.5s)
LABEL-delayloop0
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-delayloop1
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-delayloop2
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-SUB
OPERAND1-reg_isfood
OPERAND2-01
COMMENT-
LABEL-
INSTRUCTION-COMPARE
OPERAND1-reg_isfood
OPERAND2-00
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-NZ
OPERAND2-delayloop2
COMMENT-
LABEL-
INSTRUCTION-SUB
OPERAND1-s0
OPERAND2-01
COMMENT-
LABEL-
INSTRUCTION-COMPARE
OPERAND1-s0
OPERAND2-00
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-NZ
OPERAND2-delayloop1
COMMENT-
LABEL-
INSTRUCTION-SUB
OPERAND1-reg_counter1
OPERAND2-01
COMMENT-
LABEL-
INSTRUCTION-COMPARE
OPERAND1-reg_counter1
OPERAND2-00
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-NZ
OPERAND2-delayloop0
COMMENT-
LABEL-
INSTRUCTION-RETURN
OPERAND1-
OPERAND2-
COMMENT-
LABEL-init_snake
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_score
OPERAND2-02
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_snake_len
OPERAND2-init_snake_len
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_snake_direction
OPERAND2-keycode_right
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_ram_index_head
OPERAND2-01
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_ram_index_tail
OPERAND2-00
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-s0
OPERAND2-keycode_right
COMMENT-; load direction to remove next
LABEL-
INSTRUCTION-STORE
OPERAND1-s0
OPERAND2-00
COMMENT-; store direction to remove next
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_snake_head_row
OPERAND2-02
COMMENT-; snake head row
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_snake_head_col
OPERAND2-03
COMMENT-; snake head col
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_snake_tail_row
OPERAND2-02
COMMENT-; snake tail row
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_snake_tail_col
OPERAND2-02
COMMENT-; snake tail col
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_fb_data
OPERAND2-01
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_fb_row
OPERAND2-02
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_fb_col
OPERAND2-02
COMMENT-
LABEL-
INSTRUCTION-CALL
OPERAND1-fb_insert
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_fb_col
OPERAND2-03
COMMENT-
LABEL-
INSTRUCTION-CALL
OPERAND1-fb_insert
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-RETURN
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-; insert all the initial food
LABEL-load_food
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_counter1
OPERAND2-10
COMMENT-
LABEL-food_loop
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-CALL
OPERAND1-food_insert
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-SUB
OPERAND1-reg_counter1
OPERAND2-01
COMMENT-
LABEL-
INSTRUCTION-COMPARE
OPERAND1-reg_counter1
OPERAND2-00
COMMENT-
LABEL-
INSTRUCTION-JUMP
OPERAND1-NZ
OPERAND2-food_loop
COMMENT-
LABEL-
INSTRUCTION-RETURN
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-; insert food at a random location : request two random numbers, insert 10 at location
LABEL-food_insert
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-INPUT
OPERAND1-reg_fb_col
OPERAND2-rand_port_id
COMMENT-
LABEL-
INSTRUCTION-INPUT
OPERAND1-reg_fb_row
OPERAND2-rand_port_id
COMMENT-
LABEL-
INSTRUCTION-CALL
OPERAND1-fb_read
OPERAND2-
COMMENT-; read pixel at wanted location to check if the snake is already occupying it
LABEL-
INSTRUCTION-COMPARE
OPERAND1-reg_fb_data
OPERAND2-01
COMMENT-; is read pixel a snake pixel?
LABEL-
INSTRUCTION-JUMP
OPERAND1-Z
OPERAND2-skipfood
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_fb_data
OPERAND2-02
COMMENT-
LABEL-
INSTRUCTION-CALL
OPERAND1-fb_insert
OPERAND2-
COMMENT-
LABEL-skipfood
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-RETURN
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-; clear ROM to all 0
LABEL-clear_fb
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_fb_row
OPERAND2-00
COMMENT-; outer loop counter
LABEL-
INSTRUCTION-LOAD
OPERAND1-reg_fb_col
OPERAND2-00
COMMENT-; inner loop counter
LABEL-clear_outer_loop
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-
LABEL-clear_inner_loop
INSTRUCTION-
OPERAND1-
OPERAND2-
COMMENT-