Once you have decided what type(s) of floppy drive(s) you will use with the Bridgeboard, you may need to set certain jumpers to inform the system of your setup. You should set the jumper(s) before installing the Bridgeboard in your Amiga. The jumper locations are shown on the diagram below:

Fig 1

If you are using a shared drive, you must set jumper 515 correctly. By default, the jumper will be set on pin 1 and 2 to indicate that drive DF0: is selected as the shared drive. If you wish to share drive DF1:, move the jumper so that it is covering pins 2 and 3.

If you are using an internal 3.5-inch or 5.25-inch disk drive for PC use only, jumpers 501 and 502 must be set correctly. If you are using a PC drive(s), jumpers must be set on pin 1 and 2 of both J501 and J502.If you are using Amiga drive(s), move the jumpers so that they are covering pins 2 and 3 of J501 and J502. Remember, if you are using two internal drives, they must both be the same type - either PC or Amiga.

Floppy drives may have a jumper on them to control Drive Select. Standard PC floppy drives are always set as DS1, and need not be adjusted. Amiga floppy drives have a jumper to set them for DF0: (DS0 position) or DF1: (DS1 position). If you are using an Amiga floppy drive as a shared drive, the jumper should be set at the DS1/DF1: position. See your floppy drive manual for details on setting the jumper.

There is also a jumper on the Amiga motherboard for indicating the number of internal drives in use. It should be set as normal for the number of Amiga floppies (including a shared floppy drive if any). If you are using a dual-speed Amiga floppy drive, consult its user guide for special information on this jumper.

There are three ribbon cables packaged with the Bridgeboard. (One of these is a dual cable, made from two ribbon cables taped together.) You may need to use a combination of these cables depending on your floppy configuration, as explained below.

If you are sharing an internal Amiga floppy drive, either DF0: or DF1:, you need to use the dual cable with two connectors at each end. The cables are taped together, as shown below:

Fig 2

Disconnect the existing cable from the floppy drive, noting on which side the cable has its colored edge stripe. At one end of Cable A is Connector 1 with two rows of pins. Plug this connector into the existing floppy cable. Be sure you orient the connector so that both cables have their colored edge strip on the same side.

The connector at the same end of Cable B, Connector 2, has two rows of holes. Plug this connector into the floppy drive. Be sure you retain the same connector orientation as existed originally - the edge strip should be on the same side.

Fig 3

Plug the other connector on Cable A into connector CN501 on the Bridgeboard. Plug the remaining connector on Cable B into connector CN502, which is directly under CN501. Both these connectors should be oriented so that their cable´s colored edge stripes are on the side farther from the Bridgeboard´s metal bracket.

Fig 4

NOTE: Jumper J515 should have been set correctly before the Bridgeboard was installed. If you are sharing drive DF0:, the jumper should be set on pins 1 and 2. If you are sharing DF1:, the jumper should be on pins 2 and 3. Pin 1 of this jumper is the one nearest the Bridgeboard´s metal bracket.

If you are using one or two 3.5-inch internal PC-only floppy drives, you need to use the long cable with three connectors and a twist near one end:

Fig 5

Connector 1 attaches to the first internal drive, PC drive A:. Connector 2 attached to the second internal drive, PC drive B:. Connector 3 attaches to connector 503 in the top rear corner of the Bridgeboard.

Be sure that all connectors are oriented correctly. Connector 3 should be attached so that the colored stripe edge of the cable is on the side farther from the Bridgeboard´s metal bracket. Connectors 1 and 2 should be attached so that the stripped edge of the cable is on the same side as the Pin 1 end of the floppy drive´s connector. The Pin 1 side of the connector should be described in the drive´s user manual, and indicated on the drive itself.

Fig 6

If you are using a 5.25-inch internal PC-only floppy drive (A2000 and A3000T only), you need to use the twisted cable along with the 5.25-inch floppy adapter cable:

Fig 7

If you want the 5.25-inch drive to be recognized as drive A:, attach Connector 2 on the adapter to Connector 1 on the twisted cable. If you want the 5.25-inch drive to be recognized as drive B:, attach Connector 2 to Connector 2 on the twisted cable. Be sure you attach the cables together so that botch have their colored edge stripe on the same side.

Attach Connector 1 on the adapter to the disk drive. Connector 1 should be attached so that the striped edge of the cable is on the same side as the Pin 1 end of the floppy drive´s connector. The Pin 1 side of the connector should be described in the drive´s user manual, and indicated on the drive itself.

You can connect one external 3.5-inch or 5.25-inch Amiga floppy drive directly to the 23-pin connector on the rear of the Bridgeboard.

There are no jumpers on the drive or the Bridgeboard that relate to an external floppy. Use PCPrefs to configure this drive as A: or B:.

Fig 8

Editors Note: This part is copied from the AMIGA User´s Guide A2386SX BRIDGEBOARD (P/N: 368 350-02). Copyright © 1991 Commodore Electronics, Ltd.

***************************************

Die hardwareseitigen Voraussetzungen sind nun hergestellt. Nach Anschluss aller Kabel an den Amiga sollte die Brückenkarte beim Einschalten im Early Startup Menu ausgewiesen werden. Das nächste Kapitel beschreibt die Installation der Janus-Software auf der Amiga-Seite.