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Adaptec ACB2322D (ESDI Controller)
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Step 1  Controller Jumper Setup and Definition

Before the Adaptec ACB-232XB can be used, some initial setup may be
required. Figure 2-1 defines, in detail, connectors and jumper
blocks for the ACB-2322B.

2-1:

J1      Floppy drive
J3      Hard disk data cable (20-pin), Second drive (Drive 2)
J4      Hard disk data cable (20-pin), First drive (Drive 1)
J5      Hard disk control cable (34-pin), Both drives
J6      Drive activity LED - Pins 1,4 are +5 Volts, Pins 2,3 are
        Signal Ground
J7      Adaptec ACB-BIOS address selection
       *Position 1 and 2 Jumpered for BIOS
        address C8000 - CBFFF
       *Position 2 and 3 Jumpered for BIOS
        address CC000 - CFFFF
       *Position 2 and TP14 will disable the BIOS.

J2     BOARD CONFIGURATION JUMPERS
        Position 1      Hard Disk Port Addresses
                        Not installed: primary address 1F0 -1F7
                        Installed: secondary address 170 - 177
        Position 2      Floppy Disk Port Address
                        Not installed: primary address 3F0 - 3F7
                        Installed: secondary address 370 - 377
        Position 3      Bus Wait State
                        Not installed: Enabled
                        Installed: Disabled
        Position 4      Not Used
        Position 5      Read Ahead Cache
                        Jumper installed = DISABLED
        Position 6      Not used.
        Position 7      Not used.

J13     Controller's system interrupt selection
                *Pins 1 and 2 jumpered for IRQ14
                *Pins 2 and 3 jumpered for IRQ15
J21     Floppy Disk DMA Acknowledge signal selection
                *Pins 1 and 2 jumpered for DACK2
                *Pins 2 and 3 jumpered for DACK3
J22     Floppy Disk Interrupt Request signal selection
                *Pins 1 and 2 jumpered for IRQ6
                *Pins 2 and 3 jumpered for IRQ10
J20     Floppy Disk DMA Request signal selection
                *Pins 1 and 2 jumpered for DREQ3
                *Pins 2 and 3 jumpered for DREQ2


How to run two controllers in the same system in one uneasy lesson:

One of the common questions about hard drives these days is, "Can I add
one of the new IDE drives to my 286 (or better) system which already has
an MFM or RLL controller and drive?"  The answer is, "yes, probably."
In order for this scheme to work, one of the two following scenarios
must apply:

SCENARIO A:

You find that your existing controller (MFM or RLL usually) has it's
own BIOS (such as most XT-types and the the Seagate ST-21/22 series).  You
install the new IDE drive in your 286 or better using one of the usual paddle
boards and tell the CMOS setup routine that the IDE drive is the only one
installed.  You then set the original controller to a secondary address.
The IDE drive is identified through the system BIOS and the MFM or RLL drive
is accessed through the controller's onboard BIOS.

SCENARIO B:

Your existing MFM/RLL controller has no BIOS.  You can get a special
IDE paddleboard which has it's own BIOS, such as the Silicon Valley
60 series.  The MFM/RLL drive remains in CMOS, which shows no second
drive installed.  The IDE drive is accessed through the special paddle
board's BIOS (not on most cheap paddle boards).

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