Sort älteste Beiträge zu erst Sort jüngste Beiträge zu erst

1.
th99
SCIENTIFIC MICRO SYSTEMS OMTI 8150C, 8250, 8250C, 8157, 8257
Data bus:16-bit, ISA
Size:Full-length, full-height card
Hard drives supported: OMTI 8150C/8250/8250C:Two MFM ST506/ST412 drives
OMTI 8157/8257:Two RLL ST506/ST412 drives
Floppy drives supported:OMTI 8150C/8157:None
OMTI 8250/8250C/8257:Two 360KB, 720KB, 1.2MB, 1.44MB
Sector interleave:1:1
Maximum heads/cyl.:16 heads and 2048 cylinders

CABLE CONNECTIONS
34-pin data cable connector-floppy drive (OMTI 8250/C/8257 only)J1
20-pin data cable connector-drive 0J3
20-pin data cable connector-drive 1J4
34-pin control cable connector-hard driveJ5
4-pin connector-drive active LEDJ6
USER CONFIGURABLE SETTINGS
FunctionLocationSetting
»Sysclk signal from AT bus input to 5098C chipW7pins 1 & 2 closed
 No sysclk signal from bus, input tied lowW7pins 2 & 3 closed
»Single speed floppy drives (OMTI 8250/8250C/8257 only)W8pins 1 & 2 closed
 Dual speed floppy drives (OMTI 8250/8250C/8257 only)W8pins 2 & 3 closed
»Floppy precomp. values normal (8250/8250C/8257 only)W9pins 2 & 3 closed
 Alt. floppy precomp. values (OMTI 8250/8250C/8257 only)W9pins 1 & 2 closed
»Factory configured - do not alterW10N/A
»Hard drive port address is 1F0-1F7hW11open
 Hard drive port address is 170-177hW11closed
»Floppy drive port address 3F0-3F7h (8250/8250C/8257 only)W12pins 2 & 3 closed
 Floppy drive port address 370-377h (8250/8250C/8257 only)W12pins 1 & 2 closed
»Power-ground and chassis-ground separateW13open
 Power-ground and chassis-ground connectedW13closed
(0)

timestamp 2026-03-24 03:46:09