COGENT DATA TECHNOLOGIES, INC. DISKMASTER Data bus: 16-bit, ISA Size: Full-length, full-height card Hard drives supported: Two RLL ST506/412 and two ESDI drives, or four ESDI drives may be daisy-chained off of CN2 Floppy drives supported: Two 360KB, 720KB, 1.2MB, or 1.44MB [Image] CONNECTIONS Function Location 34-pin control cable connector-ST506 hard CN1 drives 34-pin control cable connector-ESDI hard drives CN2 34-pin data cable connector-floppy drive CN3 20-pin data cable connector-drive 1 CN4 20-pin data cable connector-drive 2 CN5 20-pin data cable connector-drive 3 CN6 20-pin data cable connector-drive 4 CN7 6-pin EACK connector - (For use with an CN9 E/MASTER Ethernet board) 6-pin ERQ connector - (For use with an E/MASTER CN10 Ethernet board) 4-pin connector-drive active LED CN31 USER CONFIGURABLE SETTINGS Function Location Setting » No DMA expansion JP4 closed Supports E/Master ethernet JP4 open » Drive 4 is an ST506 JP5* pins 1 & 2 closed Drive 4 is an ESDI JP5* pins 2 & 3 closed » Drive 3 is an ST506 JP6* pins 1 & 2 closed Drive 3 is an ESDI JP6* pins 2 & 3 closed » Drive 2 is an ESDI JP7* pins 2 & 3 closed Drive 2 is an ST506 JP7* pins 1 & 2 closed » Drive 1 is an ESDI JP8* pins 2 & 3 closed Drive 1 is an ST506 JP8* pins 1 & 2 closed » Floppy drive enabled JP36 pins 2 & 3 closed Floppy drive disabled JP36 pins 1 & 2 closed » Reserved for future use JP37-39 open Note:* Both pin sets must be set alike CONTROLLER CLOCK CONFIGURATION Function JP40 JP41 » Set at 10MHz pins 2 & 3 pins 1 & 2 closed closed Disabled, bus clock timing pins 1 & 2 pins 2 & 3 enabled closed closed DMA CHANNEL DRQ JP1 & JP2/jumper JP1 & JP2/jumper JP1 & JP2/jumper 1 2 3 DRQ5 closed open open » DRQ6 open closed open DRQ7 open open closed INTERRUPT REQUEST - JP3 # Jumper Jumper Jumper Jumper Jumper Jumper Jumper 7 1 2 3 4 5 6 3 closed open open open open open open 5 open closed open open open open open 9 open open closed open open open open 10 open open open closed open open open 12 open open open open closed open open 14 open open open open open closed open 15 open open open open open open closed BIOS ADDRESS ADDRESS BINARY JP18 JP17 JP16 JP15 JP14 JP13 C8000 1100100 Pins Pins Pins Pins Pins Pins 1-2 2-3 2-3 1-2 2-3 2-4 Note:Pins designated should be in the closed position. [Image] Binary one Binary zero Binary zero PROM size 8KB PROM size 8KB PROM size 16KB MISCELLANEOUS TECHNICAL NOTES The BIOS address settings range is C800 - E000 and is selected with JP12-19 using a binary translation. JP12 (LSB) and JP19 (MSB) are internal and assumed to be 0 and 1 respectively. JP13 - JP18 are set: pins 1-2 closed= 1; pins 2-3 closed= 0. Default is C8000: In addition to serving as the 2 1 place in the BIOS address selection, JP13 is also used to determine PROM size (8KB or 16KB). Due to the pin assignment a PROM cannot have an address with a 1 in the 2 1 place (such as 110001 1 0) and be 16KB (see above).