The SCSI-2 Adapter /A was OEM'd by Future Domain, based on the MCS-700 (18C50 VLSI chip). MCS-700 and MCS-600 use the same chipset, but the MCS-600 has the Apple DB25 external port.

Futher bummer- the FD design is PIO, not a busmaster.

OS/2 v.3 Switches
PowerSCSI4    Use with MCS-700 and IBM SCSI-2 adapter. DOS/Win3.1
OPT_DISK.EXE    ADF files = Options Disk (v1.6)
NV2XX.EXE    Novell 286 drivers for v2.11-2.2 (1800/18C50/950 chipsets)
PWRSCSIN.EXE    PowerSCSI for Netware 386 (v1.2)
SCSI-2 on IML System
Lacuna Convenience Partition
Specs

Passive/Active SCSI Terminating
 Passive terminating-resistors are normally fully functioning if only  internal or external devices are connected. If there are internal and external devices connected you MUST use ACTIVE -Terminating on both ends of the SCSI - cables (internal/external), especially if there are fast Hard-Disks or any other FAST SCSI-2 devices ( => 10MB/s ) connected.

TERMENA The SCSI-2 Adapter/A has an integrated terminating-resistor (Jumper). This jumper should only be removed if there are INTERNAL and also EXTERNAL SCSI - devices connected.

TERMPWR This jumper supplies the terminating-resistor voltage and should normally left in place.

SCSI-2 on IML System
   The 71G3575 will NOT support IML. Tthey will lay an IML track, but can't access the IML partition. No end of frustration... Do not try to use these in a 90 or 95 as an IML controller.
   You can use the IBM SCSI-2 as a secondary controller where they work fine. Hang a CD or a scanner off them. Nice to have a standard SCSI port to use (no RS6K stuff). .

Lacuna Convenience Partition
>Err ... Peter.  All three of my 77s (9577-BTG) has a convenience partition that was layed with the OEM'ed FD-MCS-700 that came standard.  Samething goes for my 76s (9576-BNB).

   That's what I said. The system partition will not work with the *original* Future Domain MCS-700 without the "IBM Support BIOS" .... It works on the IDE-machines (with utilizing the IBM Int4B Abios extension hooked to generic Bios Int13h -which is the boot / harddisk interrupt- ... attached to hardware IRQ 0Eh) and on the SCSI Models only with the reworked IBM
controller BIOS.  Reason why (to my opinion): the FD-controller can utilize other hardware IRQs
than only 0Eh (14).

My 9577-BTG has the IBM-version MCS-700 with the Rom BIOS 1.01 (I think) and it has the "convenience partition" as well. I had the cached SCSI in that machine as well - it also supports the partition, but is officially not supported in the Lacunas.

Adapter Memory Location
   Memory location used for the BIOS ROM
    <Segment CA00>, Segment CE00, Segment DE00, Segment C800

Adapter I/O Location
   I/O location the adapter will use
     0140, <0150>, 0160, 0170

Select Interrupt Line
   Interrupt used by the SCSI controller
     <Interrupt 5>, Interrupt 10, Interrupt 11, Interrupt 12 (Mouse), Interrupt 14 (Fixed Disk), Interrupt 15 (Reserved), Interrupt 3 (Serial Alternate), Interrupts Disabled

ADF File for MCS-700 board/IBM MC SCSI-2 adapter (18C50 VLSI)Version 1.2
AdapterID 060E9h IBM Personal System/2 SCSI-2 Adapter/A or MCS-600/700

Adapter ROM BIOS Address
    Memory address used for the ROM BIOS.  In general, the BIOS must be enabled to support fixed or removable SCSI disk drives.  If you are using the PowerSCSI software, and if the only SCSI devicesattached to this controller are tapes, CD-ROM drives or non-direct access
devices, the BIOS may be disabled to speed system startup
     <Segment CA00>, Segment CE00, Segment DE00, Segment C800, Disabled

Adapter I/O Port Address
      I/O port addresses the adapter will use
     <0140h>, 0150h, 0160h, 0170h

SCSI Adapter Address (ID)
      This is the SCSI ID of the adapter.  This value is fixed and cannot be changed
     <7>

Select Interrupt Line
    Interrupt used by the SCSI controller
     <IRQ 5>, IRQ 10, IRQ 11, IRQ 15, IRQ 3, IRQ 14, Disabled

Adapter Memory Location
   The memory location used for the BIOS ROM
     <Segment CA00>, Segment C800, Segment CC00, Segment CE00, Segment D000, Segment D200, Segment D400, Segment D600, Segment D800, Segment DA00, Segment DC00, Segment DE00

DMA Arbitration Level
   Selects the DMA channel used to transfer data
     <Level 6>, Level 7, Level 5, Level 0, Level 1, Level 3, Level 4

Select Interrupt Line
   Selects the interrupt used by the SCSI controller
     <Interrupt 5>, Interrupt 3 (Serial Alternate), Interrupt 10, Interrupt 11, Interrupt 12 (Mouse), Interrupt 14 (Fixed Disk), Interrupt 15

Use Front Panel Disk Busy Light
   Lights front panel light when a SCSI device is busy. The internal hard drive uses the same light.  No conflict if both use the same light
     <Use Front Panel Light>, Do Not Use Panel Light

Use MC BUS Wait (IBM Model 80)
   Selects the extended synchronous bus cycle used to transfer DMA data to SCSI devices. The 8580 will not support full speed DMA writes on the MCA bus, so high-speed devices required this on a 8580
     <Use Wait State (Model 80)>, Do Not Use Wait State

OS/2 Switches
The following drivers support Future Domain and IBM SCSI host adapters:
      FD8XX.ADD supports Future Domain and IBM 8-bit SCSI adapters.
      FD16-700.ADD supports FD 16-bit SCSI adapters
                                 +-----------+
                                            |
BASEDEV= ---- FD8XX.ADD --------------------------------------
           |- FD16-700.ADD -| - /ET -| Search SCSI devices for Logical Units
           +- FD7000EX.ADD -+ - /FS -| Enable fast synchronous data transfers 
                                                                                                (TMC-1850 chipset ONLY)
                            +- /RD:n+ Maximum device recovery time
  --------------------------------------------------------------|
            |         +--------------------------+ |
            |                                    | |
            +- /A:n ----------------------+ Adapter number
                        |- /!DM ----------|  Disable DASD Manager
                        |    +- :unitlist +  List of unit identifiers
                        |- /!SM  ---------| Disable SCSI Manager
                        |    +- :unitlist-+ List of unit identifiers
                        +- /ET  ----------|Search for Logical Units
                        +- :unitlist + List of unit identifiers

Termpwr Fuse
   The Termpwr fuse is a PTC Resistor which goes to high resistance if too much current flows while providing Termination Power to the SCSI devices. When the overload is removed, the PTC resistor cools down and allows normal operation.