;;********************************************************************************
;; @file
;; @brief VIU - VI Unimproved
;;********************************************************************************
.include "lcd.h65"
.include "ps2_keyboard_text_handler.h65"

.import home:absolute

.zeropage
ptr:    .res 2
.bss
buffer: .res 256

.code
.proc init
    stz ptr
    stz ptr+1
    stz buffer
.endproc

.proc insert_mode
    jsr lcd::clear
    jsr kb::init
loop:
    lda kb::char
    ldx ptr
    beq @no_char
    stz kb::char
    jsr lcd::print_char
    bra loop
@no_char:
    lda kb::keycode
    beq loop

    cmp #kb::K::ESCAPE
    beq k_esacpe
    cmp #kb::K::PRINT
    beq clear_display
    cmp #kb::K::BACKSPACE
    beq k_backspace
    bra loop
k_esacpe:
    jmp home
clear_display:
    jsr lcd::clear
    bra loop
k_backspace:
    lcd_DecrementCursor
    lda #' '
    jsr lcd::print_char
    lcd_DecrementCursor
    bra loop
.endproc