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- Path: menudo.uh.edu!menudo.uh.edu!usenet
- From: dburnett@emunix.emich.edu (Don Burnett)
- Newsgroups: comp.sys.amiga.reviews
- Subject: MINI-REVIEW: Microbotics MBX1200 RAM/FPU expansion for A1200
- Followup-To: comp.sys.amiga.hardware
- Date: 6 Jan 1993 03:59:41 GMT
- Organization: The Amiga Online Review Column - ed. Daniel Barrett
- Lines: 76
- Sender: amiga-reviews@math.uh.edu (comp.sys.amiga.reviews moderator)
- Distribution: world
- Message-ID: <1idlfdINNj21@menudo.uh.edu>
- Reply-To: dburnett@emunix.emich.edu (Don Burnett)
- NNTP-Posting-Host: karazm.math.uh.edu
- Keywords: hardware, expansion, FPU, RAM, SIMM, A1200, commercial
-
-
-
- A lot of people have been sending me mail asking me to talk more
- about my new Microbotics MBX-1200 I have installed in my Amiga 1200. This
- device adds a Floating Point Unit (FPU) and a RAM expansion to the Amiga
- 1200.
-
- First, the list price is $199 (US dollars). This is for the board
- with 0K populated. It comes with a PGA type MC68881 16MHz chip installed.
- This chip speeds up math operations significantly and is transparent to the
- machine's operation. This means if you have a 3D renderer or something
- that will use an 020 power wise already, you will be able to use it. Until
- now all C= equipment that was accelerated came with an FPU, so you will need
- one, if you don't want just slow 68000 only software.
-
- The FPU can be replaced by a faster 68881 or '882. You have to get a
- PGA style chip to replace it with. You also can clock it at 25 or 50 Mhz, if
- you have a 25 or 50 MHz chip and a clock crystal. The installation sheet
- warns heavily against trying to overclock the FPU chip saying you could
- damage your Amiga. So, buy the right chip and the right crystal if you plan
- to do this. SysInfo says my 1200HD system with only CHIP RAM (no FAST RAM)
- is "RIGHTEOUS" with this board installed. If you want more specifics, please
- send me email.
-
- The board supports the addition (without removal of the board from
- your system) of one wide-body 72 pin 32-bit wide SIMM. Caution again: don't
- try plugging your cheap run-of-the-mill PC or MAC 8-bit-wide SIMM. This plug
- is for the same type of chip you can place inside an A4000. With the
- exception that it supports an 8mb SIMM instead of just the 4mb ones that I
- know the A4000 supports.
-
- The following is a list of supported MICRON SIMMS (you may
- substitute others as appropriate):
-
- 80ns, 72-pin "wide-body"
- SIMM organized N-megabyte x 32 bits.
-
- MICRON PARTS:
-
- MT8D25632 (1MB)
- MT16D51232 (2MB)
- MT8D132 (4MB)
- MT16D232 (8MB)
-
- The instructions suggest that 70 or 60ns SIMMS will cost you more
- money and will provide you with no additional benefits.
-
- All in all it's a great board. No, there's no clock. Someone alluded
- to the fact that there might be a jumper pad on the A1200 Motherboard to
- allow you to plug in a CBM clock mod, that doesn't use the CPU slot..
-
- For more information contact Microbotics at:
-
- Microbotics, Inc.
- 1251 American Parkway
- Richardson, Texas 75081
- USA
- (214) 437-5330 (Central Time Zone, 0900 to 1700 hrs.)
-
- "MBX 1200" is a Microbotics' trade name for it's FPU/Memory device for
- the Amiga 1200; "Amiga" and "Amiga 1200" are registered trademarks of
- Commodore/Amiga
-
- ******************************************************
- dburnett@emunix.emich.edu
- EMU Mathematics Lab Consultant
- Enabling Solutions
- PO Box 318
- Ypsilanti, MI 48197
- *****************************************************
- ---
-
- Daniel Barrett, Moderator, comp.sys.amiga.reviews
- Send reviews to: amiga-reviews-submissions@math.uh.edu
- Request information: amiga-reviews-requests@math.uh.edu
- General discussion: amiga-reviews@math.uh.edu
-