SashegDev
43 lines
1.1 KiB
NASM
43 lines
1.1 KiB
NASM
; Hello World for TinyCPU
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; Prints "Hello!" to GPU via 0xC0
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;
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; TinyCPU instructions:
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; 0x00 NOP 0x01 MOV_A_B 0x02 MOV_IMM_A 0x03 ADD_A_B
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; 0x04 SUB_A_B 0x05 JMP_A 0x06 JZ_A 0x07 JC_A
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; 0x08 CMP_A_B 0x09 MOV_IMM_B 0x0A STORE_A 0x0B LOAD_A
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; 0x0C JMP_IMM 0x0D JZ_IMM 0x0E JC_IMM 0x0F INC_A
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; 0x10 CALL_IMM 0x11 RET 0xFF HLT
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.org 0x00
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; Print "Hello!"
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MOV_IMM_A 0x48 ; 'H'
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STORE_A 0xC0
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MOV_IMM_A 0x65 ; 'e'
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STORE_A 0xC0
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MOV_IMM_A 0x6C ; 'l'
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STORE_A 0xC0
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MOV_IMM_A 0x6C ; 'l'
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STORE_A 0xC0
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MOV_IMM_A 0x6F ; 'o'
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STORE_A 0xC0
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MOV_IMM_A 0x21 ; '!'
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STORE_A 0xC0
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MOV_IMM_A 0x0A ; newline
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STORE_A 0xC0
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loop:
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MOV_IMM_A 0x41 ; 'A'
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print_loop:
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STORE_A 0xC0 ; print char
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INC_A ; next char
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MOV_IMM_B 0x5B ; b = 'Z' + 1
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CMP_A_B ; compare
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JZ_IMM done ; if A == 0x5B, done
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JMP_IMM print_loop
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done:
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MOV_IMM_A 0x0A ; newline
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STORE_A 0xC0
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HLT
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