55 lines
942 B
Plaintext
55 lines
942 B
Plaintext
;;********************************************************************************
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;; @file
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;; @brief VIU - VI Unimproved
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;;********************************************************************************
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.include "lcd.h65"
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.include "ps2_keyboard_text_handler.h65"
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.import home:absolute
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.zeropage
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ptr: .res 2
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.bss
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buffer: .res 256
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.code
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.proc init
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stz ptr
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stz ptr+1
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stz buffer
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.endproc
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.proc insert_mode
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jsr lcd::clear
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jsr kb::init
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loop:
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lda kb::char
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ldx ptr
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beq @no_char
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stz kb::char
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jsr lcd::print_char
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bra loop
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@no_char:
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lda kb::keycode
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beq loop
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cmp #kb::K::ESCAPE
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beq k_esacpe
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cmp #kb::K::PRINT
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beq clear_display
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cmp #kb::K::BACKSPACE
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beq k_backspace
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bra loop
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k_esacpe:
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jmp home
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clear_display:
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jsr lcd::clear
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bra loop
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k_backspace:
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lcd_DecrementCursor
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lda #' '
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jsr lcd::print_char
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lcd_DecrementCursor
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bra loop
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.endproc
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