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- Newsgroups: biz.sco.opendesktop
- Path: sparky!uunet!hobbes!dionj
- From: dionj@sco.COM (Dion)
- Subject: Re: SCO ODT 2.0 Compability with Dell 466/M
- Organization: The Santa Cruz Operation, Inc.
- Date: Wed, 23 Dec 1992 19:40:23 GMT
- Message-ID: <1992Dec23.194023.3372@sco.com>
- Keywords: UOD361 66MHz
- References: <dlhanson.14.724464652@nap.amoco.com> <1992Dec19.000503.17364@sco.com>
- Sender: dionj@sco.com
- Lines: 150
-
-
- I have some additional info on booting 66MHz machines...
-
- In article <1992Dec19.000503.17364@sco.com> dionj@sco.COM (Dion)
- foolishly wrote:
-
- > [..]
- >1. I would not venture to say that ODT 2.0 runs on _any_ 66MHz machine.
- >It runs on most of them, and on a few we have seen problems.
- >Specifically, our Support department has a new SLS called UOD361
- >which addresses 66MHz problems that some customers have had on
- >some Dell machines. If your system fails to boot, contact
- >Support@sco.com and request this SLS.
- >
- [... info about video problems removed .. ]
- >
- >In article <dlhanson.14.724464652@nap.amoco.com> dlhanson@nap.amoco.com (David L. Hanson ) writes:
- >>I am receiving a new Dell 466/M (66Mz 486DX2 chip) sometime next week.
- >>I am hoping to use it to run ODT 2.0 which I have sitting in a box beside
- >>my desk. This new Dell has a local bus architecture for video and uses
- >>the SG3 chip set. The sales person said sure it would work with ODT 2.0
- >>so I ordered it. I had second thoughts and talked to Dell tech support;
- >>they are not so sure. From my conversation with them, there are two
- >>issues:
- >
- >1. Will SCO ODT 2.0 run on any machine with a 66 Mz 486DX2 chip?
- >>2. Secondly, does SCO ODT 2.0 have a driver for the SG3 video chip?
- >>Thanks
- >>Signature follows:
- >"Look unto me, and be ye saved, all the ends of the earth: for I am
- >>God, and there is none else." Isaiah 45:22
- >>=========================================================================
- >>David L. Hanson Internet --> dlhanson@nap.amoco.com
- >>Amoco Corporation X.400 --> A=attmail,P=amoco,S=Hanson,G=David,I=L
- >>Any opinions expressed are my own!
- >
-
- My friends in Support tell me that the UOD361 fix
-
- a) is not specifically necessary for 66MHz machines, Dell or otherwise.
- See below for a patch and workaround that works and is safer
- than employing UOD361.
-
- b) Has other fixes that you probably dont need. Generally, if you
- are not sure you need an SLS, it's safer and cleaner to avoid it.
-
- Bottom line: Dont call up and ask for UOD361 because you have a 66MHz
- machine. Follow the below procedure first.
-
- Thanks to Bela for keeping me honest and providing better info on this.
- -Dion
-
- =============================================================================
- Here's the IT script:
-
- Adaptec 154x/174x-series host adapter not recognized on fast 486 machine
-
- RELEASE: SCO UNIX System V/386 Release 3.2 Operating System Version 4.0
- SCO Open Desktop Release 2.0
-
- PROBLEM: Adaptec 154x/174x-series host adapter is not recognized on fast
- 486 machines.
-
- CAUSE: A loop in the Adaptec 154x driver ("ad") and Adaptec 174x driver
- ("eiad") executes too quickly on fast machines (many 486/66DX2
- and some 486/50DX machines). The driver asks the adapter whether
- it is present, then checks 131,072 times for a response. The check
- executes faster on faster machines. If your machine is particularly
- fast, the loop may complete before the host adapter responds. When
- that happens, the operating system does not recognize the adapter.
-
- SOLUTION: This problem will be corrected by Maintenance Supplement
- Version 4.2 for SCO UNIX System V/386 Release 3.2 Version 4.0.
- and by the next version of SCO Open Desktop. Until that
- supplement or version is available, the following two-step
- solution may be used.
-
- (1) During installation, run the machine in a "slow mode".
- Most machines have slowed-down modes which can be enabled
- from a setup program which either resides in the BIOS ROM
- or on a configuration diskette. For instance, most
- machines can be set to run at a lower clock rate (e.g. 8 or
- 25MHz); or the cache can be disabled (both the 486 internal
- cache and any external cache). Many machines also have a
- "Turbo" button on the front panel.
-
- With the machine slowed down, the host adapter should be
- recognized. Install your operating system until it is
- ready to be booted from the hard disk.
-
- (2) After successfully installing the system, bring it up in
- System Maintenance (single-user) mode. Make copies of the
- UNIX kernel and of the drivers to be patched:
-
- # cd /
- # cp unix unix.orig
- # cd /etc/conf/pack.d/ad
- # cp Driver.o Driver.o.orig
- # cd /etc/conf/pack.d/eiad
- # cp Driver.o Driver.o.orig
-
- (3) To patch the Adaptec 154x series driver:
-
- Operator input Computer response
- -------------- -----------------
- # cd /etc/conf/pack.d/ad
- # _fst -w Driver.o -
- * ahapresent+9?X ahapresent+0x9: 0x20000
- * ahapresent+9?W 100000 ahapresent+0x9: 0x20000= 0x100000
- * aha_sndcmd+9?X aha_sndcmd+0x9: 0x20000
- * aha_sndcmd+9?W 100000 aha_sndcmd+0x9: 0x20000= 0x100000
- * $q
- ^^^^^^
- (The above number is a one with five zeros).
-
- (4) To patch the Adaptec 174x series driver:
-
- Operator input Computer response
- -------------- -----------------
- # cd /etc/conf/pack.d/eiad
- # _fst -w Driver.o -
- * eiad_reset+D?X eiad_reset+0xd: 0x20000
- * eiad_reset+D?W 100000 eiad_reset+0xd: 0x20000= 0x100000
- * eiad_soft_reset+9?X eiad_soft_reset+0x9: 0x20000
- * eiad_soft_reset+9?W 100000
- eiad_soft_reset+0x9: 0x20000= 0x100000
- * $q
-
-
- (5) Relink the kernel and shut down the system:
-
- # cd /etc/conf/cf.d
- # ./link_unix -y
- # sync
- # reboot
-
- (It is safe to use reboot(ADM) only because the system is
- in System Maintenance mode). The computer reboots. Now
- turn off the "slow mode", by changing settings in BIOS
- setup or a configuration disk, or by turning on the "Turbo"
- button. The operating system should boot normally and
- recognize your Adaptec 154x/174x host adapter.
-
- NOTE: This patch corrects problems with the "ad" and "eiad" drivers
- only. No other problems are currently known with 66MHz machines
- (as of October 9, 1992). We are aware of the potential for such
- problems with the "spad" (Adaptec 152x) and "dpt" (DPT PM201x)
- drivers and would appreciate reports of any actual recognition
- problems with these host adapters.
- -----------------------------------------------------------------------------
-