BusLogic BT-646

@0709.ADF - BusLogic BT-646 S/D SDC3211F FAST SCSI 
@0F1F.ADF - SDC1611 16-bit SCSI Ad. (AHA-1640 OEM) 

BT-646 / SDC3211F
SDC1611 Go to Adaptec AHA-1640 
LED Operation
Drive Power Connector
LittleFuse
Multitasking
BusLogic Drivers
SDC Drivers
ADF Sections 
OS/2 v.3 Switches



BT-646 S/D and SDC3211F 32-Bit Fast SCSI-2

BT-646S has RP2 and RP3 only. single-ended termination 
RP2 and 3 are 10-pin 100 ohm SIPs containing 9 bused 100 ohm resistors (CTS 4610X-1-101) 

BT-646D has RP6-RP13 differential termination 
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 esistors.(Bourns 4610X-1-331) 



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 Installation Problems on Reply Powerboard for 60/65/80
   I had some vexatious problems with a PODified Powerboard, where the setup program claimed that the adf file on the options disk was damaged. If I managed to copy it to the refdisk, the system would either disable the adapter or not find the @0708.adf, which suprised me, as the correct adf is @0709 for the BT-646S. 
   I switched the POD to a DX4-100, and I was able to successfully copy the adf with no problems. But the setup program complained that it needed @0708. I then edited @0709 by renaming it to @0708.adf, then opening it and changing: 
AdapterID 0708h (important!) 
AdapterName "BusLogic BT-646S/D 32-bit FAST SCSI Host Adapter
   (just for looks) 


Update PROM for the 646 S/D
NOTE - BusLogic will NOT help with burning. It's up to YOU. 
646s-336.zip    ROM Binaries for BT-646S: 3.36-4.70 

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 boardís firmware, including initialization, command decoding, interrupt generation, and control of the data flow among the boardís components. 

Differences between and 646S and BT-646D
     BT-646S Single-ended active term, BT-646D Differential termination 



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.

ďThis error is applicable to the BT-646 when single-ended SCSI drivers 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, fhe 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 1/2 amps (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. 


BusLogic Drivers
MULTIMASTER: Drivers / Configuration Files for MultiMaster SCSI  Host Bus Adapters 
adf-150.exe    Config file for BT-640/646 v1.50 (3-8-93)
dosaspi.exe    DOS/Win SCSI ASPI Drivers v4.31C (7-12-96)
mmodt.exe      SCO Unix ODT / OpenServer 2.x/3.x v4.01 (8-26-97)
mmunix.exe     SCO Unix OpenServer 5.0.x v4.01 (7-21-97) & Unixware 2.x v3.02 (7-24-97)
nextstep.exe   NeXTStep 486 v3.2 SCSI Driver (10-3-94)
ntaspi.exe     NT ASPI Driver
nw31x.exe      NetWare 3.1X SCSI Drivers v2.56 (7-3-96)
nw4x.exe       NetWare 4.X SCSI Drivers v1.56 (7-3-96)
nwgam.exe      Netware HAM drive w/GAM spt v5.02 (7-11-97)
nwham.exe      Netware standard HAM driver v5.02 (5-30-97)
os2-2x.exe     OS/2 v2.XX SCSI Driver v1.54 (10-23-96)
warp.exe       OS/2 3.x/4.0 (Warp)Driver v1.54 (10-23-96)
win95.exe      Win95 driver upgrade v5.02 (7-14-97)
winnt-a.exe    WinNT 3.5x driver for Alpha v5.02 (7-17-97)
winnt.exe      WinNT 3.5x/4.0 SCSI driver v5.02 (7-14-97)

SDC Drivers
CONFG243.EXE - (111k)  .adf files for all Storage Dimensions SCSI adapters. Buslogic drivers are the same... The Readme file

Micro Channel RAIDCard - v2.0 (269K)  all the required files to support the -002 Micro Channel RAIDCard for OS/2 and NetWare. For use under NetWare, you must also have the LANStor Plus software. When unarchiving this file, use  the "-D" option to restore the directory structure. 

LANStor5 - v6.10 (109k)  SCSI NLM for NetWare v3.11 - supports the SDC1611/3211x under NetWare versions 3.11. Not tested or certified using NetWare v3.12 or v4.xx. 

LANStor Plus - v2.50 (114k)  SCSI NLM for NetWare v3.12 and v4.xx  most current version of LANStor for the SDC1611/3211x, and the SDC3231WS SCSI Adapters. It includes  LAPIS Plus which which is Artecon' ASPI layer (manager). 



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 alorigthm after it is preempted from  the Micro Channel 
   <"Off">, On 

1Gbyte Translation See the following setion for more details
   Change CHS per track  to support drive capacity > 1 GB 
    <"On">, Off 

Disk > 1 GB and not SC0 UNIX.
    In the DOS environment, INT 13 calls are routed through the BT-64xA/S/Dís 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 systemís 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. 



OS/2 Switches
This adapter driver supports all bus master type BusLogic SCSI Host Adapter products. The BTSCSI.ADD device driver supports the following BusLogic host adapters: 
   o  BT-640A, BT-646S - Micro Channel SCSI Host Adapters 
 Usually, ADD device drivers determine the parameters automatically. The following parameters are provided in case it is necessary to override the default parameter selection. 

 BASEDEV= -- BTSCSI.ADD -----------
                           +- /V   -+  Verbose mode
        +- /A:n ------------------------+  Adapter number
              |- /!DM -------------|  Disable DASD Manager
              |      +- :unitlist -|    List of unit IDs
              |- /!SM -------------|   Disable SCSI Manager
              |      +- :unitlist -|     List of unit IDs
              |- /TQ --------------|
              |      +- :unitlist -|
              |- /BON:n -----------|
              +- /BOFF:n ----------+
 
 

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