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===AHA154X.ADD===
{{ProdS |V20=S|V21=S|V22=S|V30=S|V31=S|V40=S|V45=S}}
Driver for the Adaptec AHA-1540/1542 SCSI host adapters.
Adapter Device Driver for Adaptec AHA-1540/1542 SCSI host bus adapters and AHA-1740/1742/1744 adapters (in standard mode).
 
Supported devices:
*AT Bus Master
**AHA-1540 AT-to-SCSI Host Adapter
**AHA-1540A, AHA-1542A
**AHA-1540B, AHA-1542B
**AHA-1540C, AHA-1542C - ISA
**AHA-1540CF, AHA-1542CF - ISA-to-SCSI Host Adapter
**AHA-1540CP, AHA-1542CP - ISA-to-SCSI Plug and Play
*EISA in standard mode
**AHA-1740 - EISA-to-Fast SCSI Host Adapter
**AHA-1740A, AHA-1742A - EISA-to-Fast SCSI Host Adapter
**AHA-1744 (differential)
 
==Syntax==
  BASEDEV=AHA154X.ADD <parameter>
  BASEDEV=AHA154X.ADD <parameter>


===Parameters===
==Parameters==
*/V
;/V : Load driver verbosely. This parameter will display the driver name as well as the version number and Adaptec copyright if the driver loads successfully.
*/DBUFF - Loose access to RAM above 16M.
;/DBUFF : Loose access to RAM above 16M.
*/A:0
 
*/BON
'''/A:0'''
*/BOFF:8


'''TIP:''' By Prof. C.W. Fischer (Physics Department Director, CPES Micro-Computer Lab). Users may be interested in a undocumented parameter on the Adaptec AHA154x.add file i.e /DBUFF. Anyone using this SCSI adapter without /DBUFF will loose access to RAM above 16M. It's a Bus mastering problem on ISA (thanks to Steven Levine).
'''/BOFF:t'''
:Allows the bus-off time to be set to a value between 1 and 64 microseconds. The default value for OS/2 2.x is 4 microseconds and this should be used for most systems.
'''/BON:t'''
:Allows the bus-on time to be set to a value between 2 and 15 microseconds. The default value for OS/2 2.x is 7 microseconds and this should be used for most systems.
;/D :Allow targets to disconnect from the SCSI bus (DEFAULT).
;/!D :Prevent targets from disconnecting from the SCSI bus. This command is not supported on boards earlier than revision B.
;/UR :Report underruns.
;/!UR :Ignore underruns (DEFAULT).


'''NOTE:''' When you use Seagate Backup Exec for OS/2 Warp, Version 3.0 with both a hard drive and a SCSI or QIC backup device connected you have to add - to avoid DMA errors - the following to your driver line to prevent BUS errors: /V /A:0 /BON /A:0 /BOFF:8
;TIP:By Prof. C.W. Fischer (Physics Department Director, CPES Micro-Computer Lab). Users may be interested in a undocumented parameter on the Adaptec AHA154x.add file i.e /DBUFF. Anyone using this SCSI adapter without /DBUFF will lose access to RAM above 16M. It's a bus mastering problem on ISA (thanks to Steven Levine).
;NOTE: When you use Seagate Backup Exec for OS/2 Warp, Version 3.0 with both a hard drive and an SCSI or QIC backup device connected you have to add - to avoid DMA errors - the following to your driver line to prevent BUS errors: /V /A:0 /BON /A:0 /BOFF:8


{|class="wikitable"
==Links==
|+Platform Support:
* {{FileLink|Adaptec_AHA-154X_1994-06-08.zip}} (1994-06-08)
!OS/2 2.x
* {{FileLink|Adaptec_AHA1XXX_6-426.zip }} - 6.426 (1992-08-13)
!OS/2 3.0
!OS/2 4.0
!OS/2 4.5x
|-
|Yes
|Yes
|Yes
|Yes
|}


[[Category:BASEDEV Statements]]
[[Category:BASEDEV Statements]][[Category:Adapter Device Drivers]]

Latest revision as of 00:38, 8 August 2025

Product Support
OS/2 1.3
OS/2 2.0 S
OS/2 2.1 S
OS/2 2.11 SMP S
OS/2 Warp 3 S
OS/2 Warp Connect S
OS/2 Warp 4 S
OS/2 Warp Server for e-Business S

Adapter Device Driver for Adaptec AHA-1540/1542 SCSI host bus adapters and AHA-1740/1742/1744 adapters (in standard mode).

Supported devices:

  • AT Bus Master
    • AHA-1540 AT-to-SCSI Host Adapter
    • AHA-1540A, AHA-1542A
    • AHA-1540B, AHA-1542B
    • AHA-1540C, AHA-1542C - ISA
    • AHA-1540CF, AHA-1542CF - ISA-to-SCSI Host Adapter
    • AHA-1540CP, AHA-1542CP - ISA-to-SCSI Plug and Play
  • EISA in standard mode
    • AHA-1740 - EISA-to-Fast SCSI Host Adapter
    • AHA-1740A, AHA-1742A - EISA-to-Fast SCSI Host Adapter
    • AHA-1744 (differential)

Syntax

BASEDEV=AHA154X.ADD <parameter>

Parameters

/V
Load driver verbosely. This parameter will display the driver name as well as the version number and Adaptec copyright if the driver loads successfully.
/DBUFF
Loose access to RAM above 16M.

/A:0

/BOFF:t

Allows the bus-off time to be set to a value between 1 and 64 microseconds. The default value for OS/2 2.x is 4 microseconds and this should be used for most systems.

/BON:t

Allows the bus-on time to be set to a value between 2 and 15 microseconds. The default value for OS/2 2.x is 7 microseconds and this should be used for most systems.
/D
Allow targets to disconnect from the SCSI bus (DEFAULT).
/!D
Prevent targets from disconnecting from the SCSI bus. This command is not supported on boards earlier than revision B.
/UR
Report underruns.
/!UR
Ignore underruns (DEFAULT).
TIP
By Prof. C.W. Fischer (Physics Department Director, CPES Micro-Computer Lab). Users may be interested in a undocumented parameter on the Adaptec AHA154x.add file i.e /DBUFF. Anyone using this SCSI adapter without /DBUFF will lose access to RAM above 16M. It's a bus mastering problem on ISA (thanks to Steven Levine).
NOTE
When you use Seagate Backup Exec for OS/2 Warp, Version 3.0 with both a hard drive and an SCSI or QIC backup device connected you have to add - to avoid DMA errors - the following to your driver line to prevent BUS errors: /V /A:0 /BON /A:0 /BOFF:8

Links

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