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- CONNECTIX ANNOUNCES MODE32 and MC73...............CONNECTIX CORPORATION
-
- Contact: Roy McDonald
- Connectix Corporation
- 800/950-5880 voice
- 415/324-2958 fax
- AppleLink: CONNECTIX
-
- For Immediate Release
-
-
-
- Menlo Park, California, April 30, 1991 -- Connectix Corporation today announced
- two new products that offer Mac-II class systems complete compatibility with
- the powerful memory features of System 7.0. MODE32 is a software utility that
- enables Mac II, IIx, IIcx, and SE/30 systems to run in standard System 7 32-bit
- mode in the same manner as the more recent Mac II-family systems. MC73 is the
- PMMU memory coprocessor needed to run Apple VM or Connectix Virtual on the
- original Mac II.
-
- MODE32 is a unique utility for Mac II, IIx, IIcx, and SE/30 users who want to
- use System 7 32-bit mode. It allows these systems to access 32-bit mode
- through the standard System 7 memory control panel in the same fashion as later
- ROM systems (IIci, IIsi, IIfx and LC). Without MODE32, the controls for 32-bit
- mode do not appear on the panel and it is not possible to use 32-bit mode.
- MODE32 is an INIT and cdev which is transparent in normal operation.
-
- Using 32-bit mode, the Mac II, IIx, IIcx, and SE/30 can access up to 128
- megabytes of contiguous physical application memory and up to 1 gigabyte (1000
- megabytes) of contiguous virtual memory. This mode overcomes the traditional
- 8 megabyte limit of previous Macintosh Operating Systems.
-
- MODE32 works by enabling the use of the System 7 32-bit addressing mode which
- would normally not be accessible on the SE/30, II, IIx, and IIcx systems. This
- problem occurs because the software built into the ROMs of these systems was
- designed only to be compatible with the less powerful 24-bit addressing mode
- (which was standard in System 6.0). By extending the compatibility of those
- ROMs to the new 32-bit mode, MODE32 provides full System 7.0 32-bit
- functionality to these earlier systems.
-
- MODE32 will be of interest both to users with large amounts of physical RAM (>
- 8MB) and those with less RAM who would like to use more than 14MB of virtual
- memory (System 7 VM or Connectix Virtual). MODE32 has a suggested retail price
- of $169 and is expected to be released concurrently with System 7.0 in mid-May.
-
- MC73 is the Motorola 68851 Paged Memory Management Unit, commonly known as a
- PMMU. The PMMU is required in order to run System 7.0 VM on a standard Mac II.
- With a PMMU, the Mac II is fully compatible with standard VM virtual memory,
- but still needs MODE32 to operate physical or virtual memory in 32-bit mode.
- The original 68020-based Mac II incorporated a motherboard socket specifically
- designed for this memory coprocessor. Ironically, the more recent 68020-based
- Mac LC is not able to take advantage of this upgrade as it lacks the necessary
- motherboard socket.
-
- The name MC73 refers to the fact that the PMMU is the current MC68851RC16A Mask
- 73 version, the only version known to be fully compatible with all of the
- Macintosh Operating System. MC73 also includes a 3M disposable grounding strap
- and a detailed installation manual. The product has a list price of $179,
- carries a 90-day warranty, and is shipping now.
-
- Connectix designs, manufacturers, distributes, and publishes innovative
- products for the Macintosh family of computers. For more information call
- Connectix Corporation in Menlo Park, California, at (800) 950-5880, fax (415)
- 324-2958, or AppleLink CONNECTIX.
-
- ###
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- This information is provided to the Apple Developer Group by the product's
- developer. Apple cannot warrant any third party's product. Please consult the
- Apple Products & Ref Library, MENU/Software Library, or Redgate Buyer's Guide
- Library on AppleLink, or contact the third-party company directly for more
- information.
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