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- FUNKYWARE.ORG - TT_BURST.TXT - 28.07.1997
-
- NOTE: Found below are one text concerning proper jumper settings
- to enable Burst Mode on Atari's own TT-Ram cards, followed
- by others discussing suitable brands and makes of SIMM for
- these cards.
-
- ***
- From: please@no.spam.mail.here.mettav (Harry Sideras)
- Newsgroups: comp.sys.atari.st.tech
- Subject: TT Fast RAM card info
- Date: Wed, 02 Apr 97 04:29:54</B>
-
- *oskancke@sn.no wrote to *All* on 29 Mar 97: ...respect, brethren
-
- >I have some questions about the Atari TT-FastRAM card made by
- >Atari. It is the 6-jumper card that I want to know more about.
- >What I want to know is what the different jumpers are for and
- >how much ram you can put into this card. What I in particular
- >want info about is how the Burst- Mode works and what it does
- >to performance. Also I need to now what type of ram is best
- >suitable for this card, both without Burst-Mode enable and
- >disabled. I currently have 4 x 4MB 80Ns SIMM's on my card now.
- >Can I use Burst-Mode with this type of ram, or is 80Ns to slow?
- >Any help and info would be very much appreciated. Thanks.
-
- I'm beginning to learn about this subject too. I have the
- information about the Atari TT-RAM board, which is posted
- below, but if anyone can confirm the settings for a GE-Soft
- board which takes 8 SIMMs I would be very grateful.
- <B>
- From: magee@cpsc.ucalgary.ca (Russell Magee)
- Date: 07 Oct 96 16:16:04
- Subj: Re: TT RAM jumper settings</B>
- ---------[COMP.SYS.ATARI.ST.TECH]---------------------------------
- I had trouble with the 2 and 3 chip SIMMs, the TT would crash
- after about 5 minutes. I returned them and asked specifically
- for 8-chip, no parity 4 meg SIMMs (70 ns). These have worked
- for me without a hitch. I think the brand I got was Hitachi.
-
- Also, someone posted the jumper settings needed for 4 meg SIMMs,
- (Thanks to dawinic@unity.ncsu.edu for the original post!) here's
- the info again:
-
- The jumpers required on a TT-Ram board (CA401058-xxx) are:
-
- SIMM type jumper W101 jumper W102 jumper W106
- 1M x 8 2 - 3 2 - 3 2 - 3
- 4M x 8 1 - 2 1 - 2 1 - 2
-
- Starting RAM Address jumper W103 jumper W104
- $0100 0000 2 - 3 2 - 3
-
- Address Mode jumper W105
- NON-BURST 1 - 2
- BURST 2 - 3 (default)
-
- -Russ Magee
-
- --
- Send replies to :hsideras@mettav.demon.co.uk (Harry Sideras)
-
- .
- From: burlein@cyber1.servtech.com (stephanie burlein hall)
- Newsgroups: comp.sys.atari.st
- Subject: Re: 2-chip SIMMs for TT
- Date: 7 Jul 1997 23:44:20 -0400</B>
-
- Neil Roughley nroughley@unix.dsoe.com wrote:
-
- >I put four 30-pin 4MB 2-chip SIMMs into my TT (with Atari's RAM
- >board). At home, I found the RAM to be flaky. After a few minutes
- >within an application, the TT crashes or I get video garbage.
- ><snip>
- >I can get the 8-chip SIMMs but they must be custom-ordered
- >by this Mac shop (no chance of refund).
-
- went thru the mill on this almost a year ago now... the bottom
- line being that _none_ of the 2 chip/3 chip Simms worked in my
- TT; they all froze it after about 4 minutes.
-
- the 8 chip/9 chip (with parity) all seemed to work fine, although
- various other posters reported difficulties with some manufacturers.
- If possible try to find a place that will take them back if they
- don't work as some TT's appear to be more finicky than others.
-
- .
- From: burlein@cyber1.servtech.com (stephanie burlein hall)
- Newsgroups: comp.sys.atari.st
- Subject: Re: 2-chip SIMMs for TT
- Date: 9 Jul 1997 23:45:05 -0400</B>
-
- Keith Brooks newhoriz@cadvision.com wrote:
- > I wrote:
- >>_none_ of the 2 chip/3 chip Simms worked in my TT;
- >>they all froze it
-
- >Not true. I've been using 8 Panasonic 3 chip 4Mb SIMMs
- >for several years now without a single problem at all.
-
- If you would read what I wrote...
- _none_ worked in _MY_ TT... TRUE! ymmv
-
- .
- From: hsideras@mettav.demon.co.REMOVE.TO.REPLY.uk (Harry Sideras)
- Newsgroups: comp.sys.atari.st
- Subject: 2-chip SIMMs for TT
- Date: Thu, 10 Jul 97 04:16:22</B>
-
- *Hi Neil*, on 08 Jul 97 you wrote: ...respect, brethren
-
- >I put four 30-pin 4MB 2-chip SIMMs into my TT (with Atari's RAM
- >board). The fella at the Mac shop said these SIMMs 'should work'.
- >After installing them in-shop, the TOS bootup screen showed the
- >new memory installed and I got a normal desktop. After a few
- >simple tests, I thought everything was fine and bought the SIMMs.
- >
- >At home, I found the RAM to be flaky. After a few minutes within
- >an application, the TT crashes or I get video garbage.
-
- I get the same problem here using 72-pin SIMMs with an AixTT RAM
- board. The TT seems to be particularly fussy about the type used.
-
- I hear that "nibble mode" RAM is the one that's required...
-
- .
- From: rcain@zetnet.co.uk (Roger Cain)
- Newsgroups: comp.sys.atari.st
- Subject: Re: 2-chip SIMMs for TT
- Date: 10 Jul 1997 17:09:23 GMT</B>
-
- On 10 Jul 1997 01:40:53, Neil Roughley wrote:
-
- >Also, I'm curious about speed: the SIMMs ordered were specified at
- >70ns. What's the speed of the 2 megs of factory TT RAM onboard?
-
- 80ns on mine.
-