collapseos/blk/502
Virgil Dupras 440ea43a88 z80a: make mnemonic names more uniform across assemblers
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.
2020-06-27 22:01:56 -04:00

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( We process the 0x20 exception by pre-putting a mask in the
(HL) we're going to write to. If it wasn't a 0x20, we put a
0xff mask. If it was a 0x20, we put a 0x7f mask. )
: @GET,
A 0x03 LDri, ( @GET )
DE COM_DRV_ADDR LDdn,
0x28 RST, JRNZ, L2 FWR ( maybeerror )
A ORr,
CZ RETc, ( Sending a straight NULL ends the comm. ) ;
: @PUT, ( @PUT that char back )
C A LDrr,
A 0x04 LDri, ( @PUT )
0x28 RST, JRNZ, L3 FWR ( error )
A C LDrr, ;
H@ ORG !
HL DEST_ADDR LDdn, ( cont. )