24 lines
663 B
NASM
24 lines
663 B
NASM
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; Arduino terminal driver
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; @author Daniele Verducci
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; config (IO port 0)
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DATA_REG: EQU IO_0
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; functions
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; Sends string
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; @param BC Pointer to a null-terminated string first character
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Term_print:
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ld a, (bc) ; bc is the pointer to passed string's first char
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cp 0 ; compare A content with 0 (subtract 0 from value and set zero flag Z if result is 0)
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ret z ; if prev compare is true (Z flag set), string is finished, return
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out (DATA_REG),a ; output char
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inc bc ; increment bc to move to next char
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jp Term_print
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; Writes a single character
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; @param A Value of character to print
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Term_printc:
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out (DATA_REG),a
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ret
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