Phoenix ConfigurationConfiguration using the Phoenix utility is similar to that under MCS. Use the arrowkeys to select the board to configure after entering the Configuration menu, selectingfunction choices and pressing Enter. Press Enter when the appropriate board slot ishighlighted.Selection among the available system options is made by using the up/down arrows.Press the Spacebar at the option to allow for a toggling among options available.There is no facility for selection of peripheral options under Phoenix. To exit, skip tothe bottom of the page and press Enter when OK is highlighted.Floppy Disk ConfigurationThe AHA-1742A is normally shipped with its floppy disk controller enabled. Thismay be disabled to prevent conflict with an existing floppy disk controller already inthe system by removing the rightmost jumper from J6 on the lower left of the board.If the jumper is removed, the board will return the identity of an AHA-1740A to anysoftware inquiry command. This allows software to use the appropriate configurationfile for the main part of the board, as described previously.The floppy disk can reside at one of two address blocks. Normally, it uses addresses3F0h-3F6h as the primary address. A secondary address of 370h-376h can be se-lected by placing a jumper on block J6 in the second position from the right, next tothe floppy enable jumper described above.ADL UtilityThe microcode with which the AHA-1740/1744 is equipped has two components.• Standard Mode (standard.hex)• Enhanced Mode (enhanced.hex)Both are permanently stored on the AHA-1740A/1742A/1744 simultaneously. Selec-tion between these modes affects the software manager required to support theboard. It has no effect on the SCSI or host bus hardware. The firmware download caneither be used to configure the board for one of the two main modes, or to upgradethe board to a later revision of firmware for a particular mode (AHA-1740/1744 only).The Standard Mode allows software drivers written for the AHA-1540 or AHA-1640families to run unaltered on the AHA-1740 family. There is no performance penaltyfor this on the EISA bus. The AHA-1740 performs 32-bit transfers at speeds up to 33MBytes/second.The Enhanced Mode allows the board to take advantage of a number of featureswhich were not available on earlier host adapters. These include:EISA-to-Fast SCSI Host Adapter Installation3-15
