; Hello World for TinyCPU
; Prints "Hello!" to GPU via 0xC0
;
; TinyCPU instructions:
;   0x00 NOP       0x01 MOV_A_B    0x02 MOV_IMM_A  0x03 ADD_A_B
;   0x04 SUB_A_B   0x05 JMP_A      0x06 JZ_A       0x07 JC_A
;   0x08 CMP_A_B   0x09 MOV_IMM_B  0x0A STORE_A    0x0B LOAD_A
;   0x0C JMP_IMM   0x0D JZ_IMM     0x0E JC_IMM     0x0F INC_A
;   0x10 CALL_IMM  0x11 RET        0xFF HLT

.org 0x00

    ; Print "Hello!"
    MOV_IMM_A 0x48     ; 'H'
    STORE_A   0xC0
    MOV_IMM_A 0x65     ; 'e'
    STORE_A   0xC0
    MOV_IMM_A 0x6C     ; 'l'
    STORE_A   0xC0
    MOV_IMM_A 0x6C     ; 'l'
    STORE_A   0xC0
    MOV_IMM_A 0x6F     ; 'o'
    STORE_A   0xC0
    MOV_IMM_A 0x21     ; '!'
    STORE_A   0xC0
    MOV_IMM_A 0x0A     ; newline
    STORE_A   0xC0

loop:
    MOV_IMM_A 0x41     ; 'A'
print_loop:
    STORE_A   0xC0     ; print char
    INC_A              ; next char
    MOV_IMM_B 0x5B     ; b = 'Z' + 1
    CMP_A_B            ; compare
    JZ_IMM    done     ; if A == 0x5B, done
    JMP_IMM   print_loop

done:
    MOV_IMM_A 0x0A     ; newline
    STORE_A   0xC0
    HLT