nakada@husc4.HARVARD.EDU (Paul Nakada) (06/01/89)
someone mentioned a while back that the Laser line of apple // clones
has a modified video circuit which uses interlacing to eliminate the
distinct border between horizontal scan lines. Apparently this is most
effective with a fairly high persistence monitor. Well, is anyone out
there knowledgeable enough to give me a hand in doing this for my //c?
There is a video connector on the back panel of the //c which has
(i hope) all of the signals necessary for creating RGB or composite
signals. I guess what i need to do is to somehow offset the second
refresh to fill in the gaps between scanlines... If anyone feels
capable enough and willing to engage in a little email correspondece on
the topic, please write to me. Then i can fill you in on the technical
stuff which you might need.
Thanks very much.
-Paul Nakada
__
| Paul Nakada '89 #8-) |
North House | nakada@husc4.HARVARD.EDU
Harvard College | seismo>!harvard!husc4!nakada.UUCP
Cambridge, MA 02138 | rutgers/ nakada@husc4.BITNET
617/498-6255 || 6264 | __|Sirald@cup.portal.com (Andrew Lionel Dalrymple) (06/02/89)
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Hello,
A note regarding the LASER 128 mode of interlacing.
All you need to is at the machine language prompt (CALL -151)
type C025 to turn it on... and C024 to turn it off. Someone
mentioned this to me a few months ago (thanks).
Also, you could use the following boot program on
the Laser. As the program boots, press CLOSED-APPLE to
turn the mode on... and when running the program again,
press OPEN-APPLE to kill the mode.
------------------------------------------------------------
50 HOME
100 LA = PEEK ( - 16287): IF LA > 127 THEN X = PEEK
( 49188 ) : HOME : PRINT : PRINT : PRINT "
P L A I N t e x t m o d e"
200 RA = PEEK ( - 16286): IF RA > 127 THEN X = PEEK
( 49189 ) : HOME : PRINT : PRINT : PRINT "
S H I F T t e x t m o d e"
NOTE: This won't look very good at all on screens that
leave 'after-glow characters'... and it also will
not look so hot in the 80col mode... although you
can try. I have found that using one of those
polorizing anti-glare screen guards works GREAT!
Cordially,
A. DALRYMPLE sirald@cup.portal.com
sun!portal!cup.portal.com!sirald
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