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@opt stack_pointer RF
@opt csr_scratch RH
@use ext_std:*
@use ext_string_io:*
; bootstrap code (must be called to set up mandatory data)
; will jump to label main
@include bootstrap
@label main
cursor_to_line RC 1
put_string RC RB " HELLO CORECAMP"
new_line RC
put_string RC RB " »»»»»»» BY JAN"
new_line RC
new_line RC
put_string RC RB " > "
set_graphics_mode gr_text_mode
@label loop
jpi loop
@label keyboard_isr
stack_stash RA RB
ldi vt_kb_pp_addr RA ; RA := Keyboard peripheral address pointer
ldr RA RA ; RA := Keyboard peripheral address deref
ldr RA RA ; RA := <16-bit keyboard character code> from MMIO register
ldi vt_term_pp_addr RB ; RB := Terminal peripheral address pointer
ldr RB RB ; RB := Terminal peripheral address deref
mov RA RD
subi RD 5 RD
subi RD 5 RD
bri zero keyboard_isr_clear
mov RA RD
subi RD 5 RD
subi RD 3 RD
bri zero keyboard_isr_backspace
str RA RC
addi RC 1 RC
jpi keyboard_isr_end
@label keyboard_isr_clear
new_line RC
put_string RC RB " > "
addi RC 1 RC
@label keyboard_isr_backspace
subi RC 1 RC
put_char RC RB " "
subi RC 1 RC
@label keyboard_isr_end
stack_restore RA RB
rti
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