a3000 switch Question?
Rick LaFleur
What's it for? I've booted the system both ways. It doesn't seem to do
anything different either way.
Any idea's?
Oh how can I add more ram? My system has 2chip 8fast.
And I'd like to add a bigger hard rive to it too. Will any SCSI drive do the
job. What's the biggest HD the Ami3000 can handle?
Please email...
Rick " new Amiga user again" LaFleur......
hehhe
Angelo Vigliotti
"Rick LaFleur" <rlaf...@rcn.com> wrote in message
news:9tcf7l$667$1...@bob.news.rcn.net...
This is the scandoubler/flickerfixer bypass switch.
Down, enabled or normal. Up, bypassed.
It's placed in bypass for screens that are already
doubled.
What type of monitor are you using ( I assume a 1940 or
other Amiga compatible) What screenmode? Check
under your boot drives root directory inside preferences
double click screenmode and see what it is currently
set to.
Jim
Mike Leavitt
> The A3000 i was just given has a enable/disable switch on the back of it.
> What's it for? I've booted the system both ways. It doesn't seem to do
> anything different either way.
> Any idea's?
> Oh how can I add more ram? My system has 2chip 8fast.
> And I'd like to add a bigger hard rive to it too. Will any SCSI drive do the
> job. What's the biggest HD the Ami3000 can handle?
To answer the rest of the question, the A3000 takes Zip ram, and those
chips are expensive and hard to find. You can also use an adapter
called an Amifast to use two eight meg simms, 16 megs is the limit
without an accelerator or harder to find ZIII memory card. Two chip
is the limit on chip (graphics) ram.
With 3.1 or less, four gigs for the hard-drive, and two for each
partition is the limit. With 3.5 or 3.9 OS, or with SFS (Smart File
System -- free) or PFS3 (commercial) the sky is the limit essentially.
--
Mike Leavitt ac...@lafn.org + team Amiga +
FRaNKy
wrote:
>The A3000 i was just givin has a enable/disable switch on the back of it.
>What's it for? I've booted the system both ways. It doesn't seem to do
>anything different either way.
>Any idea's?
>Oh how can I add more ram? My system has 2chip 8fast.
>And I'd like to add a bigger hard rive to it too. Will any SCSI drive do the
>job. What's the biggest HD the Ami3000 can handle?
If I remember well it enables / disables the internal scandoubler so
that you can connect a (now pretty standard) VGA monitor to it without
any extra hardware that converts the video's 15khz to 31khz (Numbers
might be wrong).
It allowed my deadbeat 14" vga monitor to show a whopping resolution
when running my bbs...
Peter.
Peter aka FRaNKy.
http://www.cbmgallery.com
Rick LaFleur
I'm not sure of the screen mode. Does it matter?
If I'm using a 1084S which mode should the switch be in?
"Angelo Vigliotti" <ang...@athome.com> wrote in message
news:DOjK7.109756$SF4.3...@news1.rdc1.sdca.home.com...
Rick LaFleur
Will the 16megs be added to the 8megs I allready have, for a total of 24
fast?
"Mike Leavitt" <ac...@lafn.org> wrote in message
news:3BF95ED9.MD-...@lafn.org...
Mike Leavitt
> right now a 1084S is hooked up to the A3000.
> I'm not sure of the screen mode. Does it matter?
> If I'm using a 1084S which mode should the switch be in?
If you are running a (choke) 1084s on it, it goes into the 23 pin port
and not the 15 pin one on the flickerfixer, so it doesn't matter how
you set the switch. With a 1084 you get NTSC high res laced or lower,
and I was never able to make any of the special screenmodes work
without a VGA or SVGA monitor. Even PAL was messed up, though you can
adjust the monitor to make it work. Then, of course, NTSC screens
will be messed up.
Angelo Vigliotti
That explains why you see no difference in the video regardless of
where the switch is. The 1084S connects to the RGB 23pin port
which bypasses the flickerfixer/scandoubler circuitry and outputs
at 15khz. The 1084S accepts standard 15khz Amiga output.
You need a standard VGA monitor (15pin connector) to connect
to the 15pin port on the back of the 3000 to see any change with
the enable/bypass switch. The way it works is that when the
switch is in the enabled position video output is bumped up to
31.5khz and interlaced screens are buffered in high speed
video memory and output as every scanline(de=interlacing). vice every other
scanline (Interlaced). Using non interlaced Amiga screenmodes that
are not scan doubled, the circuitry just increases the output to 31.5Khz
In bypass mode (for dBL scan screenmodes) it still increases
the output to 31.5 Khz but doesn't buffer the scanlines as
they are already doubled.
The Amiga normally cheats by using Interlaced video
(every other odd scanline is drawn on the screen first
then the scan starts again drawing every even line)
Hence the added flicker and annoying scanlines you
see. Scandoubled modes (any with dBL on them)
take every scanline and doubles it. So you get really
large displays with weird aspect ratios ;-)
With the de-interlacer/flickerfixer circuitry the
only noticeable artifact is some ghosting of fast moving
objects. But you get a rock solid display with no
scanlines otherwise.
Jim