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Re: 640x400 [message #282339] Mon, 20 January 1986 22:33
CC004049%BROWNVM.BITN[1] is currently offline  CC004049%BROWNVM.BITN[1]
Messages: 1
Registered: January 1986
Karma:
Junior Member
Article-I.D.: caip.1042
Posted: Mon Jan 20 22:33:29 1986
Date-Received: Thu, 23-Jan-86 09:14:04 EST
Sender: daemon@caip.RUTGERS.EDU
Organization: Rutgers Univ., New Brunswick, N.J.
Lines: 26

From: George S. Musser Jr.

Mike Farren writes:

 >  The necessary fix would be fairly expensive. The biggest reason for the
 > 640 X 200 limitation on each field is to reduce the bandwidth requirements
 > of the coprocessor and the memory, and to allow the CPU more cycles.
 > Maintaining the current hardware capabilities and adding the extra capability
 > you describe isn't an easy job. (Before I hear anything about the Atari ST
 > and its 640X400, 70Hz screen, let me remind you that that is a one-bit-per-
 > pixel monochrome screen.  It's ONLY color option is 320X200.  If you are
 > willing to accept THAT limitation, then the problem isn't too hard.  If you
 > want a color screen such as the Amiga's, at a reasonable cost, compromises
 > have to be made.)

Why couldn't the custom chips be modified to accept a 640x400 non-interlaced
display with a maximum of one or two bit planes?  The machine is already
limited to 4 bit planes when the horizontal resolution is 640 pixels.

The interlacing of 640x400 is my biggest complaint about the machine.  In
its ads, CBM-Amiga stresses that the 640x400 resolution outdoes IBM and
Mac, yet the interlacing makes this mode all but useless.  I live for the
day when the beautiful characters shown by SetLace won't leave me
with a headache after 30 seconds.

George
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