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║ Adaptec, Incorporated AHA-1540B/42B ║
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║ LED FLOPPY HARD DRIVE F1 ║
║ ┌────────────────────────────────────┐ ║
║ Floppy (34 pins) │.... 1::::::: 1::::::::::::: ┌┐ │╔═══ ║
║ INT.HD.(50 pins) │ ══2══ ══3══├┤ ┌┴╫─┐ ║
║ EXT.HD.(50 pins) │ ══5══ └┘ │ ║ │ ║
║ │ J5 1:::::::::::: 1: │ ║ │EXT. ║
║ ══2══ SCSI BUS │ J6 1:::: :: │ ║ │SCSI ║
║ Term. Resistors │ ┌─────┐ ┌──────┐ :: │ ║ │ ║
║ │ │uCODE│ J8 1:::::: │ BIOS │ J7 │ ║ │ ║
║ F1: 1.5A, 125V │ └─────┘ J9 1:::::::: └──────┘ └┬╫─┘ ║
║ Term. Power Fuse └───────────┐ ┌┐ ┌──┘║ ║
║ └───────┘└────────────┘ ║ ║
║ ║
║ INTERFACE: ISA(AT)->SCSI-2 ║
║ CONTROLS: 2 Floppy Drives (1542B only)(360KB, 720KB, 1.2MB, 1.44MB)║
║ 7 SCSI Devices ║
║ ║
║ J5: General Control ║
║ J5-1: Synchronous Negotiation Enable: *Disabled: (no Jumper) ║
║ Enabled: J5-1 Jumpered ║
║ ║
║ J5-2: Diagnostics (Factory use ONLY): *Disabled: (no jumper) ║
║ ║
║ J5-3: SCSI Parity Bit: *Enable Parity: (no jumper) ║
║ Disable Parity: J5-3 Jumpered ║
║ ║
║ J5-4,5,6: SCSI Address: 0 1 2 3 4 5 6 7 (7 is Default) ║
║ 4 x - x - x - x - ║
║ 5 x x - - x x - - (x = Jumpered) ║
║ 6 x x x x - - - - ║
║ ║
║ J5-7,8: DMA Channel: 0 5 6 7 (5 is Default) ║
║ 7 x - x - ║
║ 8 x x - - ║
║ ║
║ J5-9,10,11: Interrupt Chan.: 9 10 11 12 14 15 (11 is Default) ║
║ 9 - x - x - x ║
║ 10 - - x x - - ║
║ 11 - - - - x x ║
║ ║
║ J5-12,13: DMA Transfer Speed: 5.0 5.7 6.7 8.0 (5.7 is ║
║ 12 - x - x Default) ║
║ 13 - - x x ║
║ ║
║ J6: BIOS/Auto Sense Control: 1 x 1: BIOS Enable ║
║ 2 - 2,3,4: Not Used ║
║ 3 - 5: Auto Sense disable ║
║ 4 - ║
║ 5 - (1 is Default) ║
║ ║
║ ║
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║ AHA-1540B,1542B Page 2 ║
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║ ║
║ J7: Address Selection ║
║ ║
║ J7-1: Floppy Secondary Address (Default is not jumpered) ║
║ ║
║ J7-2,3,4: AT I/O Port Addr.: 334 330 230 134 130 ║
║ 2 - x - x - (Default ║
║ 3 - - x x - is 330h) ║
║ 4 - - - x x ║
║ ║
║ J7-5,6: BIOS Wait State (ns): 0 100 200 300 ║
║ 5 - x - x (Default ║
║ 6 - - x x is 0) ║
║ ║
║ J7-7,8: BIOS Address: DC000 CC000 D8000 C8000 ║
║ 7 - x - x (Default ║
║ 8 - - x x is DC000) ║
║ ║
║ J8: Floppy Disk Selection: 1: Floppy Enable (on Enabled ) ║
║ 2,3: DMA REQ. (2 or 3) (2 DMA REQ.2) ║
║ (1542B only) 4,5: DMA ACK. (2 or 3) (4 DMA ACK.2) ║
║ 6,7: INT.REQ. (6 or 10) (6 INT.REQ.6) ║
║ 8: Dual Speed Enable (off Disabled) ║
║ ║
║ J9: DMA/Interrupt: 1,2,3,4: DMA REQ. (0,5,6,7) (2 DMA REQ.5) ║
║ 5,6,7,8: DMA ACK. (0,5,6,7) (6 DMA ACK.5) ║
║ 9,10,11,12,13,14: INT.REQ. (9,10,11, ║
║ 12,14,15) (11 INT.REQ.11) ║
║ ║
╠══════════════════════════╕ Additional Info ╒══════════════════════════╣
║ ║
║ This Host Adapter may also be ordered with a high-density SCSI-2 ║
║ external connector, as part no: 1540B100 or 1542B100. ║
║ ║
║ SCSI bus terminators MUST be located at each end of the SCSI bus. ║
║ If using internal SCSI peripherals only, the terminators on the H.A. ║
║ must remain in place, and the device at the farthest point must also ║
║ have it's terminators in place. All devices between must have their ║
║ terminators removed. If using internal AND external peripherals, ║
║ the devices at the end of the internal, and external cables should ║
║ retain their terminators, and all those between, including the Host ║
║ Adapter, should have theirs removed. ║
║ ║
║ Adaptec has added support for drives larger than 1GB with their ║
║ 3.20 BIOS and uCODE. When correctly set up, the host adapter will ║
║ automatically select the correct translation for the drive. The ║
║ translation for drives over 1GB increases the heads. ║
║ ║
║ The 154x series is a Bus Mastering Host Adapter, and is well-suited ║
║ for multi-tasking Operating Systems, such as UNIX and OS/2. ║
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