86 lines
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86 lines
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<TITLE>8.1 The Z80 and gbz80 port</TITLE>
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<H2><A NAME="SECTION00091000000000000000">
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8.1 The Z80 and gbz80 port</A>
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</H2>
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<P>
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SDCC can target both the Zilog Z80 and the Nintendo Gameboy's Z80-like
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gbz80. The port is incomplete - long support is incomplete (mul, div
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and mod are unimplimented), and both float and bitfield support is
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missing. Apart from that the code generated is correct.
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<P>
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As always, the code is the authoritave reference - see z80/ralloc.c
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and z80/gen.c. The stack frame is similar to that generated by the
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IAR Z80 compiler. IX is used as the base pointer, HL is used as a
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temporary register, and BC and DE are available for holding varibles.
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IY is currently unusued. Return values are stored in HL. One bad side
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effect of using IX as the base pointer is that a functions stack frame
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is limited to 127 bytes - this will be fixed in a later version.
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<P>
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<BR><HR>
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<ADDRESS>
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<I>Johan Knol</I>
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<BR><I>2001-07-13</I>
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