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Text File | 1993-03-01 | 22.6 KB | 492 lines

Intalling 4 Floppy Drives in a system *************************************************************************** This file contains info for setting up the 3rd & 4th floppy devices for DTC controllers. SECTION 1 IS FOR DTC MODELS = 3280A, 6280-15T, 6280-15C, & 6280-15TX. SECTION 2 IS FOR DTC MODELS = 3250 & 5110 SECTION 3 IS FOR DTC MODELS = 5280CRA, CRZ, I, 5287CR, I, 6280, 7280, 7287. SECTION 4 DESCRIBES THE FLOPPY TAPE REWORK FOR DTC MODELS IN SECTION 3. SECTION 1. This section's models include: DTC3280A, DTC6280-15T, DTC6280-15C and DTC6280-15TX. These models use the DTC 403 floppy chip. 1. THE 4 FDD CABLE Below is a diagram showing what cable lines should be connected into each postition for each drive connector position. CABLE C D:1 D:0 D:3 D:2 LINE # 1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3 3 4 4 4 12 14 4 5 5 5 13 13 5 6 6 6 14 12 6 7 7 7 7 7 7 8 8 8 8 8 8 9 9 9 9 9 9 10 10 16 10 16 10 11 11 15 11 15 11 12 12 14 4 6 12 13 13 13 5 5 13 14 14 12 6 4 14 15 15 11 15 11 15 16 16 10 16 10 16 17 17 17 17 17 17 . . . . . . . . . . . . 34 34 34 34 34 34 C = controller, D:0 = dr A:, D:1 = dr B:, D:2 = 3rd FDD, D:3 = 4th FDD All drives must be set to DRIVE SELECT = 1 (0,1,2,3) The terminating resistor pack should be on the last drive only. The total terminating resistence should be 150 ohms. 1a. HOW TO BUILD THE CABLE Determine what type of FDD (floppy disk drive) will be at each position (ie. is D0 a 5.25 FDD that uses a CARD EDGE type connector or a 3.5" FDD that uses a MASS TERM type connector.) Determine how long your cable needs to be & what distance you need between drives. Attach the MASS TERM (MT) connector for the controller to one end of the cable. Pay attention to PIN 1 on both the cable & connector. Check your connectors for any "KEYS", make sure they are oriented correctly. At position D:1 attach the connector for your "B" FDD. At position D:0 separate the cable between lines 9-10 & 16-17. Make the separation long enough to twist lines 10-16 (flip 180 deg.) then attach the connector for your "A" FDD. At position D:3 separate the cable between the following lines: 3&4, 6&7, 11&12, 14&15. Make the separation long enough to place the lines 4-6 into positions 12-14 & lines 12-14 into positions 4-6. Do this without twisting the lines, then attach the connector for FDD #4. At position D:2 (which should be the end of the cable) separate the cable between the following lines: 3&4, 6&7, 9&10, 11&12, 14&15, 16&17. Make the separation long enough to twist & then place lines 4-6 into positions 14-12, lines 12-14 into positions 6-4, lines 10-11 into positions 16-15, & lines 15-16 into positions 11-10, then attach the connector for FDD #3. 2. Tape drives often have their own software drivers, auxillary cables and plug-in paddle boards. The cable described above will accept a tape drive as if it were a third floppy drive, thus providing the option to eliminate the paddle board. 3. With this cable, any kind of high or low density 3.5" or 5.25" floppy or tape drive may be connected in any position. In building this cable, be sure to put the right kind of drive connector onto each position of the cable. Use the 34-pin dual-row Berg-type connector for the 3.5" drives, and use the 34-finger dual-edge connector for the 5.25" drives. A convenient cable is to have both of these connectors at each drive position. 4. The DTC3280, DTC6280-15C, DTC6280-15T & DTC6280-15TX controller boards do not need any rework to hook up 3 or 4 floppies with the cable described earlier. INSTALLING THE SOFTWARE DRIVER 5. A software driver must be installed in the CONFIG.SYS file. 6. DTC has tried the stand-alone software driver from the following vendor and it does support 4 floppy drives using DTC controllers & the cable depicted. MANZANA MICROSYSTEMS 805-968-1387 PO BOX 2117 GOLETA, CA 93118 This software driver package includes a handy utility & diagnostic programs plus a comprehensive manual. 7. To install a 3rd floppy drive, 1 line must be added to the end of the CONFIG.SYS file. Any DOS editor type program will work. Using the MANZANA driver, the additional line will look like this: DEVICE = XDRIVE.SYS /D:2 /F:1 /U Where: XDRIVE.SYS must be in the root directory A space must be inserted between each option /D:2 is the physical location of the drive on the cable (see cable diagram) /F:1 specifies a 360k 5.25" drive /F:2 specifies a 1.2M 5.25" drive /F:3 specifies a 720k 3.5" drive /F:4 specifies a 1.44M 3.5" drive /U tells XDRIVE.SYS to install a supplemental BIOS & is used when the host computer's original BIOS does not support the 3rd & 4th floppy drives. It is nearly always required. There are other optional performance parameters listed in the Manzana manual that may be used. Please use these with caution. 8. To install both a 3rd & a 4th floppy drive, 2 lines must be added at the end of the CONFIG.SYS file. DEVICE = C:\XDRIVE\XDRIVE.SYS /D:2 /F:2 /U /C DEVICE = C:\XDRIVE\XDRIVE.SYS /D:3 /F:3 /U Where: XDRIVE.SYS is located in the sub directory = C:\XDRIVE A 1.2M drive is being setup at the D:2 position on the cable A 720k drive is being setup at the D:3 position on the cable /C enables the disk change signal & has been found reliable for High Capacity drives. Since, in this example, there is a hard disk C, the 3rd physical floppy at D:2 will be called LOGICAL DRIVE D, & the 4th physical floppy at D:3 will be called LOGICAL DRIVE E. If the 2 lines shown above are written in reverse order, then the D & E logical name assignments to the physical drives will also be reversed. 9. To install a tape drive that has its own software driver, cables, & paddle board, either use the paddle board & leave the D:2 spot on the cable vacant, or install the tape drive into the D:2 position on the cable & discard the paddle board. The tape drive installation guide will describe any line necessary to include in the CONFIG.SYS file for the tape drive. (It would most likely specify or assume the D:2 position). The 4th floppy (if used) would then need a CONFIG.SYS line of its own & specify the D:3 position. 10. The Manzana software is not copy protected & all floppy disk operations (FORMAT, ect.) may be done with regular DOS programs. DOS 3.3 or later is required for use with the 1.44M drive. 11. There are other vendors of stand-alone software drivers to support 3 & 4 floppy drives. BASTECH 818-982-7627 7525 ETHEL AVE #M NORTH HOLLYWOOD, CA 91605 SECTION 2. This section provides setup information for the DTC3250 & DTC5110. Please note that these 2 controllers ONLY SUPPORT UP TO 3 FDD'S. These models use the DTC 403 floppy chip. 1. THE 3 FDD CABLE Below is a diagram showing what cable lines should be connected into each postition for each drive connector position. CABLE C D:1 D:0 D:2 LINE # 1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 4 4 4 16 4 5 5 5 15 5 6 6 6 14 6 7 7 7 7 7 8 8 8 8 8 9 9 9 9 9 10 10 16 10 10 11 11 15 11 11 12 12 14 12 12 13 13 13 13 13 14 14 12 6 14 15 15 11 5 15 16 16 10 4 16 17 17 17 17 17 . . . . . . . . . . 34 34 34 34 34 C = controller, D:0 = dr A:, D:1 = dr B:, D:2 = 3rd FDD, Drives A & B must be set to DRIVE SELECT = 1 (0,1,2,3) The 3rd FDD must be set to DRIVE SELECT = 2 (0,1,2,3) The terminating resistor pack should be on the last drive only. The total terminating resistence should be 150 ohms. 1a. HOW TO BUILD THE CABLE Determine what type of FDD (floppy disk drive) will be at each position (ie. is D0 a 5.25 FDD that uses a CARD EDGE type connector or a 3.5" FDD that uses a MASS TERM type connector.) Determine how long your cable needs to be & what distance you need between drives. Attach the MASS TERM (MT) connector for the controller to one end of the cable. Pay attention to PIN 1 on both the cable & connector. Check your connectors for any "KEYS", make sure they are oriented correctly. At position D:1 attach the connector for your "B" FDD. At position D:0 separate the cable between lines 9-10 & 16-17. Make the separation long enough to twist lines 10-16 (flip 180 deg.) then attach the connector for your "A" FDD. At position D:2 separate the cable between the following lines: 3&4, 6&7, 12&13, & 16&17. Make the separation long enough to twist & place the lines 4-6 into positions 16-14 & lines 14-16 into positions 6-4, then attach the connector for FDD #3. 2. Tape drives often have their own software drivers, auxillary cables and plug-in paddle boards. The cable described above will accept a tape drive as if it were a third floppy drive, thus providing the option to eliminate the paddle board. 3. With this cable, any kind of high or low density 3.5" or 5.25" floppy or tape drive may be connected in any position. In building this cable, be sure to put the right kind of drive connector onto each position of the cable. Use the 34-pin dual-row Berg-type connector for the 3.5" drives, and use the 34-finger dual-edge connector for the 5.25" drives. A convenient cable is to have both of these connectors at each drive position. 4. The DTC3250, DTC5110 controller boards do not need any rework to hook up 3 or 4 floppies with the cable described earlier in this section. INSTALLING THE SOFTWARE DRIVER 5. A software driver must be installed in the CONFIG.SYS file. 6. Refer to parts 1-6 & 1-7 (from above section) for setting up the software & the CONFIG.SYS file. 7. The balance of the information provided in SECTION 1, also applies to this section, except the data concerning the 4th floppy device. SECTION 3. This section provides information on how to modify & build a cable to support more than two floppy drives on the following DTC controllers: 5280CRA, 5280CRZ 5280i, 5287CR, 5287i, 6280, 7280, & 7287. These models use the DTC 332B floppy interface chip & the 765 floppy controller chip. These models require rework to the DTC board in order to support the extra floppy devices. They can support either 3 fdd's internally or 2 internal + 2 external fdd's. 1. SOFTWARE DRIVERS The first requirement in running 3 & 4 fdds is a software driver that makes the system aware of the extra fdds. This is because the IBM AT & its clones do not support more than 2 fdds in their system BIOS (while DTC controllers are hardware capable, they do not provide software support for fdds). In some cases, these software drivers are available from the vendors of the external floppy drives, but these software drivers are usually sold only with the floppy drives. There is such a software driver available on a stand alone basis from the following companies: Bastech Manzana Microsystems 7525 Ethel Ave. #M PO BOX 2117 North Hollywood, Ca 91605 Goleta, Ca 93118 818-982-7627 805-968-1387 The Bastech driver only supports 1 extra fdd, either 1.44mb or 720k types. It will not support the 4th fdd. The Manzana driver is able to support all 4 floppy types, as well as both a 3rd & 4th floppy drives. Refer to Bastech for more information on their product & to Section 1 for info on the Manzana driver. IBM & Phoenix Technologies also have external floppy software drivers. These drivers only support 1 extra fdd, that being a 720k 3.5" floppy drive. Neither driver require special utilities to format or copy to & from the drives: they use the DOS Format & Copy commands. These drivers are not available as a stand alone product. 2. SYSTEM BIOS The system BIOS must support the 2 internal drives connected to any AT type computer system. The system BIOS must also support the type of drive attached with most floppy software drivers for external drives, such as the IBM & Phoenix drivers. This is true because the "Driver.sys" file must be used in conjuction with these drivers. "Driver.sys" will only run drive types that are supported by the system BIOS. If the Bastech driver is used the system BIOS or DOS version does not have to support that type of drive. 3. OPERATING SYSTEM The version of DOS must support the type of floppy drive attached as external if the IBM or Phoenix drivers are used. This is because the "Driver.sys" file that comes with the operating system is necessary to run the IBM & Phoenix drivers. The PC-DOS version 3.x and above support 720K byte drives. The Bastech & Manzana drivers will work with PC-DOS & MS-DOS versions 2.0 and later. 4. DTC CONTROLLER BOARD DTC controllers that use the DTC-332 chip require the following rework to run more than 2 floppy drives. This rework falls into 2 areas depending on the configuration to be used. The first is wanting to use 1 or 2 external floppy drives. The second is wanting 3 floppy drives to be internal in the system. The rework needed to run external floppy drives requires a 37-pin D-sub right angle connector to be soldered into the J-6 location. Some 37-pin D-sub connectors come with a bracket already attached for the back of a circuit board. Connecting one of these may cause the mechanical dimensions of the board to incorrect for your system. If this is the case the bracket will need to be removed from the connector. The correct 37-pin D-sub right angle connector is approximately 1 inch long. There is a shorter connector available, but in most systems you will be unable to attach the cable to it or get it to mate with the system chasis. Build the cable described in figure 2 & connect it to J-6 & the external fdds. Install the board and the necessary software drivers. The rework needed for the internal setup is as follows: Connect a wire between J-1 pin 2 and J-6 pin 3 Connect a wire between J-1 pin 10 and J-6 pin 7 Connect a wire between J-1 pin 22 and J-6 pin 13 Connect a wire between J-1 pin 24 and J-6 pin 14 Use 26 gauge or smaller wire & do soldering on the solder side of the board. Build the cable described in figure 3 & connect it to J-1 & the internal fdds. Install the board and the necessary software drivers. PLEASE NOTE: Do not try to mix these setups together. If the 37-pin D-sub connector is added and the wiring modifications are also done, damage to the floppy circuit will possibly occur. Also, any modification performed by anyone other than the DTC RMA Department, the warranty on the board is VOID. 5. CABLES Different cable versions are necessary for the use of specific controller & drive configurations. It is beyond the scope of this note to describe the exact part numbers needed. If you do not feel familar with the equipment or techniques necessary to construct common ribbon cable configurations, the have someone who is capable do this work. Work done outside of Data Technology is not warranted by Data Technology. The materials needed will be a 34-wire ribbon cable of the necessary length for your system box & the appropriate connectors to connect the ribbon cable to your particular type of drive & controller. These connectors should be ribbon cable to 34-pin edge connectors for 5.25" drives or ribbon cable to 34-pin header connectors for 3.5" drives. The controller end of the cable will be a 34-pin header connector for connection to J-1 or a 37-pin D-sub right angle connector for connection to J-6. When connecting the cables, the last drive on the cable should contain a terminating resistor. This is true of both cables if using J-1 or J-1 & J-6. All drives should be selected as drive 2 with any of the described cables. This assumes the drive select addresses are labled 1 thru 4 as opposed to 0 thru 3. 6. MISCELLANEOUS NOTES Some of the newer versions of DTC controllers already have part of the rework described above completed. To determine if this rework is done, check for continuity between the following pins: J-1 pin 22 to J-6 pin 13 and J-1 pin 24 to J-6 pin 14. If these 2 sets of pins are already connected, only do the other 2 wires (J-1 pin 2 to J-6 pin 3 & J-1 pin 10 to J-6 pin 7). Although J-1 pin 2 is to be connected to J-6 pin 3, this can not be utilized by the Bastech driver. This is added only for software drivers that might utilize this pin correctly. This pin is used to select the type of media in 5.25" 1.2 Mbyte drive or a 3.5" 1.44 Mbyte drive. Since the software drivers listed do not utilize this pin, only 1.44 Mbyte drives that have an internal media sensor will work with these drivers to format a 720 Kbyte diskette in a 1.44 Mbyte drive. WARNING -- Any modification to DTC controllers, performed by anyone other than DTC RMA department, will void any and all warranties. FIGURE 1. Basic board layout -- note: J6 is not populated with a connector pin 1 is the top solder pad in the left column. Pads count top to bottom staying in the left column, pad 19 is at the bottom. ─────────────────────────────────────────┬─┬┬┐╔══ J4 J3 J2 J1 └─┘│└╢ ┌┐ ┌┐ ┌┐1┌┐2 ├─╢ ││ ││ ││ ││ ┌─┐ │ ║ └┘ └┘ ││ ││ J6└─┘ │ ║ └┘ └┘34 DTC │ ║ DTC 332 │ ║ 351 │ ║ ┌─┐ ├─╢ ─────┬┬┬┬┬────┬──┬┬┬┬┬┬┬┬┬┬┬─┬┬┬┬┬┬┬──┬──┴─┴─┴─╢ └┴┴┴┴────┘ └┴┴┴┴┴┴┴┴┴┴─┴┴┴┴┴┴┴──┘ ║ ║ FIGURE 2. EXTERNAL FLOPPY DRIVE CABLE This is a standard floppy twisted cable (lines 10-16 twisted going into the last drive connector) except for the connector that attaches to the external connector on the controller. Use a 37-pin D-sub MALE flat ribbon type connector. ( one side attaches to the 37 D-sub on the controller & the other side of the connector attaches to the ribbon cable.) Use 34 pin flat ribbon cable. Attach ribbon cable starting from the botton of D-sub connector, this will leave the top 3 lines left open ( lines 1,2,& 20 will be left with no connection). NO DIAGRAM OF THIS CABLE IS AVAILABLE FOR THIS DOCUMENT Contact DTC Tech Support for a hard copy of this drawing. FIGURE 3. INTERNAL 3 DRIVE DAISY CHAIN CABLE Below is a diagram showing what cable lines should be connected into each postition for each drive connector position. CABLE C D:1 D:0 D:2 LINE # 1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 4 4 4 4 4 5 5 5 11 5 6 6 6 12 6 7 7 7 13 7 8 8 8 8 8 9 9 9 9 9 10 10 16 10 10 11 11 15 5 11 12 12 14 6 12 13 13 13 7 13 14 14 12 14 14 15 15 11 15 15 16 16 10 16 16 17 17 17 17 17 . . . . . . . . . . 34 34 34 34 34 C = controller, D:0 = dr A:, D:1 = dr B:, D:2 = 3rd FDD, Drives A & B must be set to DRIVE SELECT = 1 (0,1,2,3) The 3rd FDD must be set to DRIVE SELECT = 2 (0,1,2,3) The terminating resistor pack should be on the last drive only. The total terminating resistence should be 150 ohms. 1a. HOW TO BUILD THE CABLE Determine what type of FDD (floppy disk drive) will be at each position (ie. is D0 a 5.25 FDD that uses a CARD EDGE type connector or a 3.5" FDD that uses a MASS TERM type connector.) Determine how long your cable needs to be & what distance you need between drives. Attach the MASS TERM (MT) connector for the controller to one end of the cable. Pay attention to PIN 1 on both the cable & connector. Check your connectors for any "KEYS", make sure they are oriented correctly. At position D:1 attach the connector for your "B" FDD. At position D:0 separate the cable between lines 9-10 & 16-17. Make the separation long enough to twist lines 10-16 (flip 180 deg.) then attach the connector for your "A" FDD. At position D:2 separate the cable between the following lines: 4&5, 7&8, 10&11, & 13&14. Make the separation long enough to place the lines 5-7 into positions 11-13 & lines 11-13 into positions 5-7, then attach the connector for FDD #3. SECTION 4. This section describes the FLOPPY TAPE REWORK for the DTC controllers listed in Section 3. please note: this section is not complete at this time. If you have any questions regarding Data Technology controllers, please call 408-262-7700. ------------------ END ------------------