CompuServe Thread

Daniel, I have just received a 2091 controller and below is the info on the ram portion of it excerpted from the manual. (No, I want to keep the manual) 🙂 ____________________________ Bank 3 U26 U27 U28 U29 | 2 MEG Bank 2 U22 U23 U24 U25 | 2 MEG Bank 1 U18 U19 U20 U21 | 1 MEG Bank 0 U14 U15 U16 U17 | 512 K —————————- Inserting the RAM chips. Note: Be careful to properly align the chips before inserting them. Do not force them or bend the pins. Each chip has a notch or dot on one end to show the location of pin 1. When the end with the notch or dot is held to the left, pin 1 will e in the lower left corner. The chip should then be inserted so that the notched end is towards the left of the board. (In vertical position sockets are at the bottom with Jumper 1 on the left side above them.) === | .| SCSI LED | .| Connector | .| | .| ===. 1 2 4 ========= | . . . |JP5 OPTIONS | . . . | ========= JP1 ======= |. . . .| |. . . .| ======= 2 1 5 0 M M 1 K B B 2 K |….| JP2 AUTOBOOT ENABLE ====== ====== ====== ====== 512K | 512K | 512K | 512K ====== ====== ====== ====== ====== ====== ====== ====== 1meg | 1 MEG | 1 MEG | 1 MEG ====== ====== ====== ====== ====== ====== ====== ====== 2 MEG | 2MEG | 2 MEG | 2 MEG ====== ====== ====== ====== ====== ====== ====== ====== 2 MEG | 2MEG | 2 MEG | 2 MEG ====== ====== ====== ====== If you are installing 512K, insert the four sockets labeled 512K. 1MB (8 chips) insert them in the eight sockets labeled 512K & 1 MEG. If you are installing 2 megabytes of memory (16 chips), insert them in all 16 sockets. If your system fails to boot once the RAM chips are installed, there is most likely a problem in the first 512K of memory. Make sure that all the RAM chips are installed in the right directioin and that all the pins are straight. Check to see if any pins are curled under or not fully inserted. If you find a bent pin, remove the chip, carefully straighten the pin, and then reiinsert the chip. Setting the jumper. You must set a jumper on the board to match the amount of RAM installed. As shipped, the jumper is set to 0K, or no RAM installed. Lift the jumper straight off and replace it on the set of pins labeled the same as the amount of RAM installed. JP 2 autoboot enable/disable JP 3 Factory use using kickstart 1.3 or higher set jumper 2 to the autoboot position. jumper 5 option 1 LUN Enable. Only affects SCSI drives. If you have more than one device at a physical address, set this jumper to on. When this jumper is enabled, the system looks for eight logical Unit Numbers (LUN), or eight devices, at each physical SCSI address and will attempt to open Logical Units 0 through 7 at each physical SCSI address. When this jumper is disabled, the system will look for one device. Factory set to OFF. (Huh? How's that work! Hmmm) JP5 Option 2 Time-out length. If you are using a SCSI drive that takes longer than 30 seconds to start up when you turn the system on, such as some Seagate drives, you may wish to set this jumper to the ON position. When in the off position, the time-out period is short. When ON the system will wait a longer time before checking the drive. When this jumper is enabled, it disables parity checking during the message in phase. Certain hard disks, such as Seagate disks, do not generate parity during the message in phase. With these hard disks, set this jumper to ON. Factory set to OFF. JP5 Option 4: Reserved Ok Daniel, that is about it for the RAM portion of the manual. Any questions, I'll try to answer, but I just got this thing in the mail and haven't ever fooled with an A2091 SCSI card before. Factory set to OFF CMOS 256K x 4 DRAMS 120ns or faster Daniel, are you using the correct ram chips? Are they 256K x 4? Christopher