[stella] VDELPx

Subject: [stella] VDELPx
From: Thomas Jentzsch <tjentzsch@xxxxxx>
Date: Tue, 14 Jan 2003 23:42:17 +0100
One question about VDELPx. How exactly does it work?

I found two possibilities:
1. VDELPx changes the GRPx-register where the value is written to
2. VDELPx changes the GRPx-register which is displayed

If I enable VDELP0 and write value A into GRP0, then disable VDELP0, and
write value B into GRP0 and then enable VDELP0 again, what is
displayed by GRP0 now?

1. B (because it was written into the visible register)
2. neither A nor B (because nothing was copied into the 2nd register,
   which is now visible because VDELP0 is enabled)

Can I trust z26 (2.) here?

Have fun!
Thomas Jentzsch         | *** Every bit is sacred ! ***
tjentzsch at web dot de |

Archives (includes files) at http://www.biglist.com/lists/stella/archives/
Unsub & more at http://www.biglist.com/lists/stella/

Current Thread