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440ea43a88
Initially, I used the same letters as those used in the z80 ref docs, but it makes the different assemblers harder to use than they should. Having consistent "argtype" rules across assemblers should help.
17 lines
561 B
Plaintext
17 lines
561 B
Plaintext
( We process the 0x20 exception by pre-putting a mask in the
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(HL) we're going to write to. If it wasn't a 0x20, we put a
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0xff mask. If it was a 0x20, we put a 0x7f mask. )
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: @GET,
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A 0x03 LDri, ( @GET )
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DE COM_DRV_ADDR LDdn,
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0x28 RST, JRNZ, L2 FWR ( maybeerror )
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A ORr,
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CZ RETc, ( Sending a straight NULL ends the comm. ) ;
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: @PUT, ( @PUT that char back )
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C A LDrr,
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A 0x04 LDri, ( @PUT )
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0x28 RST, JRNZ, L3 FWR ( error )
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A C LDrr, ;
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H@ ORG !
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HL DEST_ADDR LDdn, ( cont. )
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