C8EFC.ADF - Init file for @8EFC.ADF rev71upd.exe SCSI-2 Fast/Wide Adapter Firmware Upgrade .71 corv77.exe SCSI-2 Fast/Wide Adapter Firmware Upgrade .77 corvC9.exe SCSI-2 F/W Enhanced Fast/Wide Firmware Upgrade FRU 93H7896 & 52G3380 ibm2.exe F/W and OS/2 2.1 Fix '94 (ibm2scsi.add and ibm2m57.add) scsi2fw.exe SCSI-2 F/W Support Diskette v2.0 scsi2fw.txt Readme for scsi2fw.exe 194-145 SCSI-2 F/W Adapter/A, SCSI-2 Differential F/W Adapter/A AN-0904 An Introduction to the Differential SCSI Interface DS36954 - Quad Differential Bus Transceiver AN-904: Application Note 904 An Introduction to the Differential SCSI Interface Oct. 1994 ... IBM TECHNICAL DISCLOSURE BULLETIN ... Adapter Microcode Protection during Download SCSIFIX.ZIP Finally! A utility to alter the number of sectors for a SCSI drive and convert them to a 3.94GB drive! Bob Eager, you have answered a prayer! Differential
SCSI-2 Fast/Wide Adapter FRU 11H3599 /
11H7660 Differential SCSI Fast/Wide Adapter FRU 11H3599 [no workee] / 11H7660 [workee] (RS6K 4-6)
RN1,2,3 Removed on
RS/6000 systems when a high-reliability configuration is
used (one of them there "Y" arrangements illegal to
normal SCSI users). What is With the Yellow
Termpacks? The SCSI-2 Differential Fast/Wide Adapter/A supports an internal single-ended and an external differential SCSI bus. FRU 11H3599
FRU 11H7600
How Many is Enough? Tim Clarke uttered this after a pint of warm beer: All **IBM** SCSI CBIOS-flavour (i.e. *not* FD MCS700 OEM) will share IRQ14 and you only need one BIOS ROM enabled to drive multiple adapters. So, for example you *should* be able install (in the same slot-type, please) IBM F+W SCSI-2 "Corvette", IBM SCSI w/cache ("Spock") and IBM SCSI w/o cache ("Tribble") in the same PS/2. No naughties like AHA1640, Storage Dimensions unless you disable their BIOS ROMs and assign a different IRQ. OS Limits J7 Pinout ![]() Fast/Wide
in 8590/8585 FRU 11H7660 Rework A comes off the fourth MCA contact. Jim Shorney rains on our parade- he warns that foil
cuts may have been made in addition to the rework
wires. Enhanced Differential SCSI Fast/Wide Adapter FRU 52G3380 [workee] (RS6K 4-C)
Rear of Enhanced DFW ![]()
DS36954
- Quad Differential Bus Transceiver Why Five DS36954? Remember, this adapter was used by AIX, and supports a high-reliability configuration "Five devices can implement a complete SCSI initiator
or target interface. Three transceivers in a package are
pinned out for data bus connections. The fourth
transceiver, with the flexibility provided by its
individual enables, can serve as a control bus
transceiver." If you look at the further two DS36954 on the front (by
the yellow termpacks), it seems we would need five
complete DS36594 plus one gate from a sixth DS36594 for
16 bit SCSI, and the rest of the gates (three from the
sixth and four from the seventh) are used for control. 89F7000 Term Network, SE The SCSI-2
Differential Fast/Wide Adapter/A is a dual-ported, fast
and wide (two bytes wide) SCSI Micro Channel adapter
that provides synchronous SCSI bus data rates of up to
20MBps. The internal SE port is capable of
addressing up to seven SE SCSI devices and the
differential external port is capable of addressing up
to seven differential SCSI devices, providing a maximum
of 14 devices per adapter. The number of physical
devices attached to each port is limited by SCSI bus
cabling restrictions. The external differential
port can support a total cable length of 25 meters (82
feet). Corvette vs. Enhanced Corvette Turbo William R. Walsh wrote: Quick testing in the Server 95A upgraded to P180MMX shows a bit of a speed improvement over the standard issue Corvette. Using a Seagate 10,000 RPM SCA hard disk and UZ's "no-LED" driver, I got:
The Enhanced Corvette Turbo shows a CPU utilization of 10.4% compared to the Corvette's 10.1%. Tests were run using the Simpli Software HDTach tool, which was used before during SPOCK-206 NT driver testing. Possible MCA Bus Controller Problems (RS/6000 Specific, but may affect PS/2s?) ![]() Some MCA bus controller chips, P/N 61G2323 (Malibu), can cause system problems. The third line is the datecode. The following datecodes are suspect: 1Q010013N 1Q010023N 1Q03K023N 1Q04T003N 1Q06K013N
There are three types of symptoms you may
see.... Affected Controllers
Note
(*): The Integrated SCSI-2 F/W controller is
the one on the I/O planar of the 7012-380/390/39H and
7012-3AT/3BT/3CT systems. PTC Function There is one PTC for the internal SCSI bus and another for the external bus. The PTC protects the SCSI bus from high currents due to shorts on the cable, terminator, or device. It is highly unlikely that the PTC resistor can be tripped by a defective adapter. A fault (short circuit) causes an increase in PTC resistance and temperature. The increase in resistance causes the PTC resistor to halt current flow. The PTC resistor returns to a low resistance and low temperature state when the fault is removed from the SCSI bus or when the system is powered off. Wait 5 minutes for the PTC resistor to fully cool, then reset. MF-SM Series MF-SM150
Fixed, local copy PLCC Socket on Fast/Wide The PLCC Socket U7 was possibly to provide a RS/6000 BIOS, and the jumper J5 might have been to enable it. Documentation for the RS/6000 says that PLCC socket is unused. The related 4-4 [11H4779] SCSI-2 SE High Performance Internal/External I/O Controller has a chip (FRU 52G7507) in the PLCC socket. The 4-4 is the only F/W related SCSI adapter to have the PLCC chip installed.. Jumpers
on Fast/Wide J5
grounds out pin 33 on the internal SCSI controller
82G2645. Purpose unknown. 68 pin Internal Connector on D F/W
SCSI Adapter AMP (and Tyco) #
1-557089-2 Newark Electronics 97F8813
Designed for use with 30 AWG solid conductors on .064mm (.025") centers. look HERE Molex 71660i Molex part
15-92-3068 1.27mm (.050") Pitch Drive
connector
SCSI device and adapter configuration flexibility Systems with the enhanced SCSI device and adapter support allow up to 8 IBM PS/2 SCSI adapters of any type to be installed in a single system. The maximum number of SCSI devices which many be configured in these newer systems has also been increased from 60 to 120. However, other factors, for example, the type of devices (optical, etc.), cooling requirements, or power consumption of the devices may limit the number for a particular system. SCSI Device Order Adapters are scanned for SCSI devices beginning with the SCSI adapter in the lowest numbered slot. Devices connected to the same adapter are logically ordered according to device SCSI IDs in order from 7 to 0 and then from 15 to 8 according to the priority scheme defined by the SCSI standard. Devices connected to a SCSI-2 Fast/Wide adapter's internal bus connector are ordered logically before devices connected to the external bus of the same adapter. Maximum
SCSI Devices Supported NOTE: Use of a 8 bit (Narrow) cable forces the controller to default to only 7 devices supported on that port, even if all devices on that cable are Wide. Fast
POST Consequences ADF Sections @8EFC.adf 4/10/95 I/O Address DMA Arbitration Level
SCSI Adapter Address (ID)
Move Mode Support Wait State Support
Data Parity Exception Handling
Selected Feedback Return
Exception 100ns Streaming Data Transfer
Support Target Mode When target mode is enabled,
this adapter appears as a processor device on the
other system and unless you have specialized software
that can communicate between the two systems through
these processor devices (peer-to-peer communication),
there is no advantage in having target mode enabled. When target mode is disabled, this adapter does not
appear as a device to the other system, and one more
device can be shared by the two systems. If your
system is not sharing any SCSI devices with another
system on this adapter, it does not matter whether you
enable or disable target mode. SCSI Disconnect Fast SCSI - External
Wide SCSI messages - External
Wide SCSI messages - Internal
Internal/External Bus Mode
NOTE: SCO Unix and
Banyan Vines can not recognize devices configured on the
SCSI-2 F/W Adapter (DFW as well), when in a 90 /95 level
3 BIOS or higher. This is due to the the internal
and external ports beinge separated. A special
version of the SCSI-2 F/W Adapter's ADF
(@8EFC.ADF) file is available to allow the busses to be
set to a COMBINED state, which overcomes this problem. NOTE: I don't
know what version this is for, nor do I know if later
versions of SCO Unix and Banyan Vines fixed this issue.
The last version of the F/W ADF has "COMBINED" as a
choice. System Determined ESDI Requirements ESDI
Requirements |