26 June 2016 - Rescue operations have commenced.
@0708.ADF - BusLogic BT-640 / SDC3211B
RP1, RP2 and RP3 are 8-pin 220/330 ohm SIP resistor packs (221/331G or equivalent)
BT-640A SCSI Adapter for
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.
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:
ďApplicable to the BT-646 when SE SCSI drivers are
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!)
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 0708h "BusLogic 32 Bit Bus Master MCA-to-SCSI Host Adapter (v1.50)"
Memory location of the host adapter's BIOS PROM. To disable the host adapter's BIOS PROM, choose the 'Disable' option. Note, if two Micro Channel host adapters reside in the system one of them must have its BIOS PROM disabled. The default setting is DC000h.
<"DC000h">, Disable, D8000, D4000, D0000, CC000, C8000, C4000
I/O Port Address
I/O Port of the host adapter. Default I/O address is 330h.
<"330h">, 334, 234, 134, 230, 130
DMA channel used to transfer data The default level is 5.
<"Level_5">, 6, 7, 4, 3, 1, 0
Bus Arbitration Fairness controls whether the host adapter implements the fairness alorigthm after it is preempted from the Micro Channel. Default is fairness enabled.
Interrupt channel the host adapter will use to report status. The default is interrupt 15.
<"Int_15">, 14, 12, 11, 10, 9
The 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, the host adapter can achieve a maximum data transfer rate of 40 MBytes/sec on the Micro Channel bus. If data streaming is disabled, the maximum data transfer rate is 20 MBytes/sec.
NOTE: SCSI BIOS 4.70 has "33 Megabyte per second Bursting Transfer Active".
Adapter SCSI Bus ID
SCSI ID of the host adapter. The default setting is SCSI ID 7
<"Id_7">, 6, 5, 4, 3, 2, 1, 0
Adapter Initiate Sync Negotiation
Synchronous transfer on the SCSI bus will be initiated by the host adapter if 'On'. The default setting is On.
Adapter SCSI Parity Checking
The host adapter will check SCSI Parity if 'On'. The default setting is On.
DOS Disk Space > 1GBytes
The host adapter will change cylinder, head, & sector per track to support drive capacity greater than 1GigaByte if 'On'. The default setting is Off. See the information below on Disk >1GB.
Disk > 1 GB and not SC0
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.]
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.
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