mirror of
https://github.com/Asraelite/littlebigcomputer.git
synced 2025-07-17 16:16:51 +00:00
117 lines
2.5 KiB
Text
117 lines
2.5 KiB
Text
; CPU version 0.1
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; GPU version 0.1 on IO port 1
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nop
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b _start
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characters:
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char_H_top: ; 0
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.data 0b000000_100010_100010_111110
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char_H_bottom:
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.data 0b100010_100010_100010_000000
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char_e_top: ; 1
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.data 0b000000_000000_011000_100100
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char_e_bottom:
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.data 0b111100_100000_011100_000000
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char_l_top: ; 2
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.data 0b000000_100000_100000_100000
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char_l_bottom:
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.data 0b100000_100000_010000_000000
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char_o_top: ; 3
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.data 0b000000_000000_011000_100100
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char_o_bottom:
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.data 0b100100_100100_011000_000000
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char_w_top: ; 4
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.data 0b000000_000000_101010_101010
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char_w_bottom:
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.data 0b101010_101010_010100_000000
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char_r_top: ; 5
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.data 0b000000_000000_111000_100000
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char_r_bottom:
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.data 0b100000_100000_100000_000000
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char_d_top: ; 6
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.data 0b000100_011100_100100_100100
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char_d_bottom:
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.data 0b100100_100100_011100_000000
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_start:
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li x6, 1 ; x position
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li x7, 1 ; y position
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sw x0, 0b01_0100_000000(upper) ; gpu clear screen
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sd x67, 0b01_0000_000000(upper) ; gpu move cursor
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; H
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lw x0, char_H_top(zero) ; upper 24 pixels
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lw x1, char_H_bottom(zero) ; lower 24 pixels
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sd x01, 0b01_0010_000000(upper) ; gpu print 6x8 char
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addi x6, x6, 6 ; x position += 6
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sd x67, 0b01_0000_000000(upper) ; gpu move cursor
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; e
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lw x0, char_e_top(zero)
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lw x1, char_e_bottom(zero)
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sd x01, 0b01_0010_000000(upper)
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addi x6, x6, 6
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sd x67, 0b01_0000_000000(upper) ; gpu move cursor
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; l
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lw x0, char_l_top(zero)
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lw x1, char_l_bottom(zero)
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sd x01, 0b01_0010_000000(upper)
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addi x6, x6, 6
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sd x67, 0b01_0000_000000(upper) ; gpu move cursor
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; l
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lw x0, char_l_top(zero)
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lw x1, char_l_bottom(zero)
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sd x01, 0b01_0010_000000(upper)
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addi x6, x6, 6
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sd x67, 0b01_0000_000000(upper) ; gpu move cursor
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; o
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lw x0, char_o_top(zero)
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lw x1, char_o_bottom(zero)
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sd x01, 0b01_0010_000000(upper)
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addi x6, x6, 6
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sd x67, 0b01_0000_000000(upper) ; gpu move cursor
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; w
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lw x0, char_w_top(zero)
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lw x1, char_w_bottom(zero)
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sd x01, 0b01_0010_000000(upper)
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addi x6, x6, 6
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sd x67, 0b01_0000_000000(upper) ; gpu move cursor
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; o
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lw x0, char_o_top(zero)
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lw x1, char_o_bottom(zero)
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sd x01, 0b01_0010_000000(upper)
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addi x6, x6, 6
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sd x67, 0b01_0000_000000(upper) ; gpu move cursor
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; r
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lw x0, char_r_top(zero)
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lw x1, char_r_bottom(zero)
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sd x01, 0b01_0010_000000(upper)
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addi x6, x6, 6
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sd x67, 0b01_0000_000000(upper) ; gpu move cursor
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; l
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lw x0, char_l_top(zero)
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lw x1, char_l_bottom(zero)
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sd x01, 0b01_0010_000000(upper)
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addi x6, x6, 6
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sd x67, 0b01_0000_000000(upper) ; gpu move cursor
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; d
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lw x0, char_d_top(zero)
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lw x1, char_d_bottom(zero)
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sd x01, 0b01_0010_000000(upper)
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nop
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nop
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nop ; wait for print to finish
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sd x01, 0b01_0011_000000(upper) ; gpu flush buffer to screen
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wfi
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