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- Path: sparky!uunet!spool.mu.edu!enterpoop.mit.edu!eru.mt.luth.se!lunic!sunic!seunet!kullmar!piraya!overdose!Magnus_Thelander
- From: Magnus_Thelander@p18.atb.bbs.bad.se (Magnus Thelander)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: Help with Accelerator needed
- Message-ID: <OD.10badnet.ftnOA92-901-302p18_A5C679F7@piraya.bad.se>
- Date: 27 Dec 92 16:58:57 GMT
- References: <92357.125923ADB103@psuvm.psu.edu>
- Sender: BadNet@piraya.bad.se
- Reply-To: Magnus_Thelander@p18.atb.bbs.bad.se (Magnus Thelander)
- Organization: The final frontier, Lund, Sweden
- Lines: 35
- OD-Comment-To: Internet_Gateway
-
- In a message of Tuesday the 22 December 17:59:00, Internet Gateway wrote:
-
- IG> It's a CBM 2620. Does it automatically recognize the 32bit ram on
- IG> board or do jumpers have to be set to 0, 2, or 4 meg.
-
- C= A2620 Jumper configuration
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
- J302 must be installed for proper operation on 4-layer motherboards.
-
- J200 specifies the clock used by the 68881 FPU. As shipped, the FPU
- uses the basic 14.3 MHz clock also used by the 68020 and 68851. If a
- faster 68881 or 68882 is installed with the appropriate crystal
- module, moving J200 to the lower position will route that module's
- output to the 68881.
-
- J301 specifies the amount of RAM installed in the A2620. When no
- jumper is in place, the system expects 2 megabytes. With the jumper in
- place, the system expects 4 megabytes.
-
- J303, when installed, disables all A2620 DRAM.
-
- J304 selects which operating system to autoboot. When no jumper is in
- place, the system autoboots Amiga DOS. With the jumper in place, the
- system autoboots UNIX (assuming you have UNIX on a hard drive or tape
- drive).
-
- J500, as shipped, sets the RAM timing to 100 nanoseconds. Moving it
- requires 80 nanoseconds DRAM.
-
- Yours truly, Magnus
-
- "When the going gets tough, the tough hide under the table."
- ---Baldrick
- --- VolVoxReply v2.1 b1
-