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@0708.ADF - BusLogic BT-646 S/D SDC3211F FAST SCSI
@0709.ADF - Storage Dimensions SDC3211F FAST SCSI (Same board, different ADF!!!)
BT-646 ADF
BT-646 User's Guide
646s-336.zip Firmware 3.36 and
SCSI BIOS 4.70 Requires EPROM burner!
Original used ST Microelectronics M27C256B
-12F1
SDC3211F
Firmware BIN file, 3.38 ODD [U5]
SDC3211F Firmware BIN
file, 3.38 EVEN [U6]
"27128"
silk screened inside socket, but it used Macronix
MX27C256PC-12 [28 pin DIP]
Looks like they diddled with it, 0000-03FF is all 0s,
0400-07FF are data.
BT-646
Fast Micro Channel Host Adapter Technical Reference
P/N 3002113
MultiMaster Device Drivers
Mylex was bought by LSI Logic. Downloads (for now) are
HERE
BT-646 / SDC3211F
LED Operation
BIOS Revisions
Access BusLogic Firmware Menus
Drive Power Connector
LittleFuse
Multitasking
ADF Sections
BT-646 S/D and SDC3211F 32-Bit Fast SCSI-2
D1 LED
D2 1N5820
D3 1N5817
F1
Littlefuse MSF 125v 1.6A
J1 50 pin
header
J2 HPDB50
port
J4 Power
JS1-55 0 Ohm
shunts (-S only!)
RP2,3 CTS
4610X-1-101 (-S only!)
RP4,5
10X-1-221 (-D only!)
RP6-13
4610X-2-151 or -331 (-D
only!)
U1,2
KM6865BJ-20
U5 Firmware
high byte
U6 Firmware
low byte |
U15 BIOS
high byte
U16 BIOS low byte
U17 AMD
N80C186-20 (MPU)
U22 BusLogic
80C20 (DMA Busmaster)
U27 40.0000
MHz osc
U28 SCSI IF
Ctrlr
U33 DM7407M
U34 74F04
U35 7408D (-D) F08 XAC250 (-S)
U36-38
DM74LS08M (-D only!)
U39-44 TI 751768 (-D only!)
U45-47
DS36954AV (-D only!)
VR1 LT1086CT
2.85 (-S only!)
1 |
U28 may be an
Emulex 2400150 or a QLogic FAS236FAS236 datasheet
BT-646S
single-ended termination - has RP2 and RP3 only.
RP2, R3 - 10-pin 100 ohm SIPs containing 9 bused 100 ohm
resistors (CTS 4610X-1-101)
BT-646D
differential termination - has RP6-RP13
RP6,8,10,12 are 10-pin SIPs with 5 isolated 150 ohm
resistors (Bourns 4610X-2-151)
RP7,9,11,13 are 10-pin SIPs with 9 bused 330 ohm
resistors. (Bourns 4610X-1-331)
DS36954AV The
DS36954 is a low power, quad EIA-485 differential bus
transceiver especially suited for high speed, parallel,
multipoint, I/O bus applications. 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.Datasheet
Primary
Controller in Non-IML System
Enable the BIOS. Set your boot drive to ID0
or the BT-64x will not be able to boot from it. Also, you
should set the boot drive to "autostart" so it spins up as
soon as the system is turned on. I had a 0662 set to ID0,
but the BT-646 complained about Target 0, Lun 0 not being
detected, but then showed the 0662 at ID0, then the CD at
6,0. After jumpering the 0662 to autostart, everything was
fine.
BT-646S/D SCSI Adapter for
MicroChannel Systems
32-bit bus master DMA transfers of up to
40MB/second across the MC bus, up to 10 MB/sec
synchronous and up to 7 MB/set asynchronous SCSI data
transfers. Support for up to seven SCSI devices, hard
drives with up to 8GB capacity each. Enhanced SCSI-2
features: scatter-gather, disconnect-reconnect, and
command-tag queuing
BT-646x Host Interface
Microprocessor
A 20MHz Intel 80186 16-bit MPU is used to
supply the speed for low command overhead. This MPU
coordinates all activity on the BT-646S/D under the
direction of the board’s firmware, including
initialization, command decoding, interrupt generation,
and control of the data flow among the board’s components.
Accessing BusLogic
Firmware Menus
Boot from a DOS disk (which should include debug.exe)
a:debug
-
-g=dc00:6 (BIOS Base Address:Offset Number) DC00 is
the default BIOS address
A screen will appear and prompt you to proceed. You can
use these menus to SCSI Format (Low-Level Format) a disk,
or perform other SCSI functions.
Buslogic Tips
- Ensure that all Buslogic Host
Adapters in a Multiple Host environment are at the same
Firmware/BIOS level. This is important if you are
replacing or adding new Host Adapters in an existing
system.
- Check that C43, a surface mount
capacitor on the reverse side of the PIB is removed. This
was to cure loss of video on warm-boot. This change has
been incorporated into the Buslogic Boards supplied with
new Systems at Firmware level 3.37/4.73.
- Prior to Firmware level 3.37/4.73 you
must ensure that you do not have a Tape or CD-ROM device
set at ID=1 on the Primary Host Adapter. It interferes
with the Buslogic POST testing as it expects to see a Hard
Disk only.
- 3430 System BIOS 1.07 or greater is
required for use with BusLogic cards.
- DOS will only see two hard disks
attached to the Buslogic Subsystem, at ID=0 and ID=1, you
must use DOS device drivers to see any more. Refer to the
RAID section of this manual for more info.
- During Buslogic Initialization the
screen shows which SCSI devices are responding on the
Primary Host Adapter only.
- You can use DOS Debug command to scan
the SCSI Bus for devices.
- Under NT 4.0, the MS default Buslogic
driver will not allow sharing of interrupts. To work
around this, use the driver from NT 3.5x or a copy of the
driver from BusLogic/Mylex.
Buslogic Firmware History
There are 4 EPROMS on the Buslogic PIB's. 2 are the PIB's
Firmware, U5 & U6. and two are BIOS extensions, U15
& U16.
Current F/W levels (Note the version without a suffix is
the latest, i.e. 3.36c precedes 3.36)
Firmware EPROM BIOS EPROM
U5
& U6 U15
& U16 NT USE?
-------
--------- --------
3.31
4.50 Do Not
Use
3.36c
4.70 OK *1 *2
3.36
4.71A OK *2
3.36
4.73 OK *2
3.37f
4.73 OK
3.37
4.73 OK
3.38
4.73 OK
(needed for Differential w NCR RAID)
3.39
4.73 OK
(Required for NT 4.0)
Ensure all Buslogic HBAs in Multiple Host
environment use same Firmware/BIOS level.
*1 - Does not issue spin-up command, so jumper Hard
Disks to enable spin-up at power on.
*2 - SCSI bug that causes periodic SCSI bus timeouts, and
can be a problem for large NT systems. If you have these
versions, check your Event Log for SCSI errors to
determine if you need to upgrade. These versions will also
give errors if Tape and CD-ROM devices are at ID=1 on the
primary controller.
Subsequent releases of firmware since 3.37f/4.73 correct
various minor SCSI matters, but are not system
threatening.
LED Operation
When power is first applied to the BT-640A,
an on-board diagnostic routine is run to verify that the
major functional components of the board are operating
correctly. The bus master chip, the SCSI controller chip,
the firmware PROM, the local RAM and internal data buses
are tested. Results of the tests are indicated by an LED
on the board.
The LED will first turn on when power is
applied. If the diagnostics find no malfunctions, the LED
will then go off. In normal operation, the LED will be
illuminated when command or SCSI bus activity occurs on
the board. If an error is detected by the diagnostics, the
LED will repeatedly flash a specific number of times, with
a long pause between flashes, to indicate the board
function which failed. This will continue until the board
is powered down or reset. Failure interpretation from the
number of flashes is as follows:
|
Flashes
|
640A-646S/D Failure
|
|
Always On
|
Not operating/missing terminator |
|
1
|
Firmware ROM checksum failure |
|
2
|
Local RAM test failure |
|
3
|
SCSI controller / interface failure |
|
4
|
Internal data bus failure |
|
5
|
Internal address bus failure |
|
6
|
Bus master chip failure |
|
7
|
SCSI drive type mismatch* |
|
Constant
|
Fuse Blown. |
*This error is when single-ended SCSI drives are
connected to the differential SCSI bus.
Disk Drive Power Connector
A 4-pin disk drive power connector (J4) is
located at the top edge of the BT-64x board next to the
SCSI connector Jl. This connector provides +12V and +5V
power.
Note:
The BT-64x brings the 12 volt power supply to the 4-pin
power connector (14) via three gold fingers on the edge
connector. The power rating of the Micro Channel edge
connector on the12 volt is one ampere per finger.
Consequently, the maximum power allowed from the 12 volts
(Pin 1 of J4) is three amperes. Because certain large SCSI
drives may require more than three amperes when their
motors are spinning up, BusLogic recommends that this
connector not be connected to these large SCSI
drives.
Based on the power rating of the SCSI drives,
if is recommended that this power connector not be daisy
chained to multiple drives.
Term Power Fuse
SDCxx11x and BT-64x use a Microlite Little
Fuse that is 125v and 1.6A (Littel 27301.5 125V 1.5A or
equivalent micro fuse). It is difficult to see that the
fuse is blown so you will need to use a VOM to test for
continuity. The fuse can blow if termination power
settings are not correct on the SCSI devices or if you
disconnect the SCSI cables while the card or SCSI devices
have power. (Ed. Sure
ain't kidding!)
Multitasking Operation
For operating systems such as UNIX, NetWare,
and OS/2, the mailbox protocol of the BT-64x provides true
multitasking operation. Through the use of a mailbox
structure, the BT-64x can support up to 255 tasks with
minimum host processor intervention. Onboard firmware
controls all of the SCSI activity that a task requires,
including the Arbitration, Selection, Disconnection,
Reconnection, and command completion status. This same
mailbox protocol supports both initiator and target mode
operation permitting high speed host-to-host communication
and scatter-gather data transfers.
AdapterID
0709 BT-646 / SDC3211F 32-bit FAST
SCSI Host Adapter
File @0709.ALL Contains all of the options available
to this adapter.
I/O Port Address
I/O Port of the host adapter
<"330h" (io
0330h-0333h)>, 230h (0230-0233), 130h
(0130-0133), 334h (0334-0337), 234h (0234-0237), 134h
(0134-0137)
Interrupt Request
Interrupt channel used to report
status
<"IRQ-11">,
10, 15, 14, 9, 12
Arbitration Level
DMA channel used to transfer data
<"Level
5">, 6, 7, 4, 3, 1, 0
Adapter SCSI Bus ID
SCSI ID of the host adapter
<"Device ID
7">, 6, 5, 4, 3, 2, 1, 0
BIOS Address
Memory location of the host adapter's BIOS
PROM. Note, if two SDC3211B are in the system one must
have its BIOS PROM disabled.
<"DC000h"
(dc00-dfff)>, Disable, D8000h (d800-dbff),
D4000h (d400-d7ff), D0000h (d000-d3ff), CC000h
(cc00-cfff), C8000h (c800-cbff), C4000h
(c400-c7ff)
SCSI Parity Checking
The host adapter will check SCSI Parity if
'On'
<"On">,
Off
Synchronous Negotiation
Synchronous transfer on the SCSI bus will
be initiated by the host adapter if
'Enabled'
<"Enabled">,
Disabled
; The function of this bit was changed. The data width
function is detected by the host adapter and this switch
was ignored.
; Slot Data Width
; The adapter can be inserted into a
16 or 32 bit slot on the motherboard. ;This option
controls the data transfer size of 16 or 32 bits
; <"16">,
"32"
Data Streaming
Streaming data procedure transfers data
blocks by using a single address followed by multiple 16
or 32-bit data transfers within a single streaming data
cycle. If data streaming is enabled for a Micro Channel
bus that supports streaming, the host adapter can
achieve a maximum data transfer rate of 40 MBytes/sec on
the Micro Channel bus. If data streaming is
disabled or the Micro Channel bus does not support
streaming, the maximum data transfer rate is 20
MBytes/sec.
<"Disable">,
Enable
Arbitration Fairness
Bus Arbitration Fairness controls whether
the host adapter implements the fairness algorithm after
it is preempted from the Micro Channel
<"Off">,
On
1Gbyte Translation
See the following section for more details
Change CHS per track to support drive
capacity > 1 GB
<"On">,
Off
Disk > 1 GB and not SCO
UNIX.
In the DOS environment, INT 13 calls
are routed through the BT-64xA/S/D’s ROM BIOS. This
on-board BIOS intercepts host interrupt 13H calls and
dispatches a command to the BT-64x for all host to SCSI
disk accesses. When the >lGB option is turned on, the
BT-64x BIOS can access up to 8 GBytes per disk.
Otherwise, it can only access the first 1 GBytes even if
the formatted disk capacity is greater than 1GByte. This
1GByte restriction does not apply to other operating
systems, such as NetWare, UNIX, SC0 UNIX 3.2.4, or OS/2
if the operating system can boot without accessing >
1 GBytes. If the operating system’s bootable image
resides below 1 GBytes then it can boot via Interrupt
13H. Once any of these operating systems are booted, the
disk accesses are not routed through Interrupt 13H and
the operating system can access the entire disk space
even if the > 1 GB option is not turned
on.
Under SC0 UNIX 3.2.2, the >lGB option
must be turned off because the operating system itself
has a 1 GByte limitation. Otherwise, disk images may be
corrupted when the 1 GByte boundary is reached. For SC0
UNIX 3.2.4, the operating system does not impose the 1
GByte limit, and this option can be turned on or off
accordingly. Consequently, the >lGByte support must
be turned on under the following two conditions: (1) the
combined space of all the DOS partitions exceeds lGByte,
or (2) >lGByte disk accesses are required to boot the
operating system. To enable the > 1 GB support, turn
on this option. Note: If
this option is changed, you must reformat the disk to
avoid corrupting the existing file system.
{Ed. The >1GB
translation scheme is incompatible with IBM SCSI
controllers. After formatting a DPES-13080 1.08GB drive
on a BT-646S (>1GB translation enabled), I was unable
to access it after then attaching the drive to a
Corvette. I had to reformat the drive with the
Corvette.]
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