From: imc@comlab.ox.ac.uk (Ian Collier)
Subject: Re: Z80 ADC/SBC emulation
Originator: imc@msc3.comlab
Date: Tue, 20 Dec 1994 19:15:09 GMT

In article <PFREIRE.94Dec15192841@lamparina.inesc.pt>, pfreire@inesc.pt wrote:
>                half carry (H) is another name for the 4th bit (and oddily
>the 12th bit of the result with word operands).

No it isn't...  it's the carry that went from bit 3 to bit 4 during the
addition or the borrow during the subtraction.

Ian Collier - Departmental Lecturer (and perpetual postgrad student) -
imc@comlab.ox.ac.uk - Oxford University Computing Laboratory, Wolfson
Building, Parks Road, Oxford OX1 3QD - WWW Home Page (including Spectrum
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