MONOLITHIC SYSTEMS, INC. (COLORADO MSI) MICROPAQ 452 REV. B Data bus: 16-bit, ISA Size: Full-length, full-height card Hard drive supported: Two IDE (AT) Interface drives Floppy drives supported: Two 360KB, 720KB, 1.2MB, or 1.44MB drives [Image] CONNECTIONS Function Location 40-pin IDE(AT) Interface connector J1 34-pin control cable connector - floppy drive J2 26-pin parallel port (LPT1/2/3) - internal J3 10-pin serial port 1 (COM1/2/3/4) - internal J4 10-pin serial port 2 (COM1/2/3/4) - internal J5 4-pin connector - Drive active LED J6 28-pin VESA(VGA) feature connector - internal J7 26-pin VESA(EGA) feature connector - internal J11 15-pin analog VGA port - external J13 9-pin digital EGA port- external J21 USER CONFIGURABLE SETTINGS Function Location Setting » Pin 34 on IDE interface grounded J10 closed Pin 34 on IDE interface not J10 open grounded » Floppy drive precompensation is J12 open 125ns Floppy drive precompensation is J12 closed 187ns » Hard drive enabled J14 closed Hard drive disabled J14 open » On-board video enabled J15 closed On-board video disabled J15 open » Floppy drive Interrupt IRQ6 J16 closed enabled Floppy drive Interrupt IRQ6 J16 open disabled USER CONFIGURABLE SETTINGS Function Location Setting » Single speed floppy drives J17 open supported Dual speed floppy drives J17 closed supported » 16-bit video bus enabled J18 open 8-bit video bus enabled J18 closed » Floppy drive change signal J19 closed sense enabled Floppy drive change signal J19 open sense disabled » VGA clock enabled (normal J22 pins 1 & 2 operation) closed Feature connector clock J22 pins 2 & 3 enabled closed » Hard drive Interrupt IRQ14 J24 closed enabled Hard drive Interrupt IRQ14 J24 open disabled IDE IOCHRDY PIN SELECTION Function J8 J9 » IDE IOCHRDY from IDE pin 21 off on enabled IDE IOCHRDY from IDE pin 27 on off enabled Pin 21 setting is for Seagate, CDC, Imprimis, and Miniscribe hard drives. Pin 27 setting is for Quantum hard drives. Conner and WD hard drives ignore the setting of these switches. SERIAL PORT 1 CONFIGURATION COM S1/switch 1 S1/switch 2 S1/switch 3 S1/switch 4 » 1 on off off off 2 off on off off 3 off off on off 4 off off off on Disabled off off off off SERIAL PORT 1 (J4) INTERRUPT REQUEST IRQ S1/switch 5 S1/switch 6 » 3 on off 4 off on Disabled off off PARALLEL PORT (J3) CONFIGURATION - S2 LPT S2/switch 1 S2/switch 2 S2/switch 3 » 1 on off off 2 off on off 3 off off on Disabled off off off PARALLEL PORT (J3) INTERRUPT REQUEST IRQ S2/switch 5 S2/switch 6 » 7 off on 5 on off Disabled off off SERIAL PORT 2 CONFIGURATION COM S3/switch 1 S3/switch 2 S3/switch 3 S3/switch 4 » 1 on off off off 2 off on off off 3 off off on off 4 off off off on Disabled off off off off SERIAL PORT 2 (J5) INTERRUPT REQUEST IRQ S3/switch 5 S3/switch 6 » 4 off on 3 on off Disabled off off VIDEO DISPLAY CONFIGURATION Primary Adapter Secondary JP20 S4/1 S4/2 S4/3 S4/4 Adapter *Monochrome EGA w/CGA 40 x 1 & on on on on 25 2 *Monochrome EGA w/CGA 80 x 1 & off on on on 25 2 *Monochrome EGA w/EGA 200 1 & on off on on line 2 *Monochrome EGA w/EGA 350 1 & off off on on line 2 *CGA 40 x 25 EGA 2 & on on off on w/monochrome 3 *CGA 80 x 25 EGA 2 & off on off on w/monochrome 3 EGA w/CGA 40 x *Monochrome or 1 & on off off on 25 none 2 EGA w/CGA 80 x *Monochrome or 1 & off off off on 25 none 2 EGA w/EGA 200 *Monochrome or 1 & on on on off line none 2 » EGA w/EGA 350 *Monochrome or 1 & off on on off line none 2 EGA *CGA 40 x 25 2 & on off on off w/monochrome or none 3 EGA *CGA 80 x 25 2 & off off on off w/monochrome or none 3 VGA enable S4/switch 5 on (all other modes disabled) All other S4/switch 5 modes enable off (VGA mode disabled) For JP20 pins designated should be in a closed position. When VGA mode is enabled, the settings of JP20 and S4/switch 1 - 4 are ignored. The options with a (*) in front of them require an add-on card to function. MISCELLANEOUS TECHNICAL NOTES The function of S2/switch 4 is undocumented. All other jumpers are for factory tests and should remain factory-configured.