ADAPTEC, INC.
C0026
CN2
J8
J9
CN3
J5 J6
AHA-1520
Data
The Micro House Encyclopedia of Hard Drives - VOLUME 3
Q2/92
16-bit, ISAbus:
Half-length, full-height cardSize:
Up to seven SCSI devicesHard drives supported:
Two 360KB, 720KB, 1.2MB or 1.44MBFloppy drives supported:
CONNECTIONS
USER CONFIGURABLE SETTINGS
í Data transfer in DMA disabled
í Boot enabled (Intercept INT19 call)
í Synchronous negotiation enabled
í Disconnect by target / INT15 enabled
Copyright © 1991, 1992, 1993 by Micro House Int'l (800) 926-8299. Research Dept. (303) 443-389.
LocationFunction
CN250-pin SCSI cable connector-internal
CN350-pin SCSI cable connector-external
SettingLocationFunction
openJ5/jumper 1
closedJ5/jumper 1Data transfer in DMA enabled
closedJ5/jumper 2
openJ5/jumper 2Boot disabled (INT19 normal)
closedJ5/jumper 5
openJ5/jumper 5Synchronous negotiation disabled
closedJ5/jumper 6
openJ5/jumper 6Disconnect by target / INT15 disabled
openJ5/jumpers 7 & 8í Factory configured - do not alter
Continued on next page . . .
VOLUME 3 - Controller Cards
ADAPTEC, INC.
AHA-1520
í SCSI parity check enabled
í
í
í
. . . continued from previous page
USER CONFIGURABLE SETTINGS
SettingLocationFunction
openJ6/jumper 8
closedJ6/jumper 8SCSI parity check disabled
í I/O port address 340h
í 7
openclosedopenopenopenclosed5
í 0
í IRQ11
openJ9/jumper 5
closedJ9/jumper 5I/O port address 140h
SCSI ADDRESS
J6/jumper 3J6/jumper 2J6/jumper 1SCSI ID
openopenopen0
openopenclosed1
openclosedopen2
openclosedclosed3
closedopenopen4
closedopenclosed5
closedclosedopen6
closedclosedclosed
DMA CHANNEL
J8/4 & 8J8/3 & 7J8/2 & 6J8/1 & 5J6/7J6/6DMA
openopenopenclosedclosedclosed7
openopenclosedopenclosedopen6
closedopenopenopenopenopen
INTERRUPT REQUEST
J9/4J9/3J9/2J9/1J6/5J6/4IRQ
closedopenopenopenopenopenIRQ9
openclosedopenopenopenclosedIRQ10
openopenclosedopenclosedopen
openopenopenclosedclosedclosedIRQ12
Continued on next page . . .
Copyright © 1991, 1992, 1993 by Micro House Int'l (800) 926-8299. BBS (303) 443-9957.
ADAPTEC, INC.
AHA-1520
í DC000h
DMA Jumper 4 Jumper 5Jumper 2 Jumper 3
í DMA Channel 2
í Msg #0 and #4
The Micro House Encyclopedia of Hard Drives - VOLUME 3
. . . continued from previous page
BIOS ADDRESS
FLOPPY DRIVE DMA - J7
MESSAGE SELECT
Msg #2 - SCSI device info.Msg #1 - Jumper config. info.Msg #0 - Adaptec Header
Msg #4 - Error messagesMsg #3 - Boot Progress info.
JP5/jumper 4JP5/jumper 3Message
J9/jumper 8J9/jumper 7J9/jumper 6Address
closedclosedclosed
closedopenopenC8000h
closedclosedopenCC000h
closedopenclosedD8000h
openN/AN/ADisabled
DACKDRQ
openopen
closedopenMsg #0, #3 and #4
openclosedAll messages displayed
closedclosedMsg #4 only
openclosedopenclosed
closedopenclosedopenDMA Channel 3
Copyright © 1991, 1992, 1993 by Micro House Int'l (800) 926-8299. Research Dept. (303) 443-389.
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