Re: A82: 1 Problem first....
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Re: A82: 1 Problem first....
On Tue, 10 Feb 1998 21:11:18 -0600, you wrote:
>
>As you know, or don't know, I am now porting Pong 83z to the 82. I have
>it about half ported now, and it can be done by next Monday. But I only
>have 1 problem that somebody here might be able to help me with. The
>game uses
>jp P and
>jp M ;you know plus/minus jump tests
>Since I use a MAC and CAZ does not support P and M, I must find an
is this doing a jump if the sign bit is +/- ? If so, you cannot use
the carry flag, it is for unsigned numbers. Instead, you should use
the bit test op on the MSB (bit 7). Then jp z,label jumps if the
value is positive.
-mike
mgp4007@omega.uta.edu
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