MONOLITHIC SYSTEMS, INC. (COLORADO MSI)
MICROFRAME 386S6
| Processor | 80386SX (exact location unidentified) | 
| Processor Speed | 16/20MHz | 
| Chip Set | C & T | 
| Video Chip Set | None | 
| Maximum Onboard Memory | 8MB | 
| Maximum Video Memory | None | 
| Cache | None | 
| BIOS | AMI | 
| Dimensions | 330mm x 215mm | 
| I/O Options | Floppy drive interface, IDE interface, parallel port, PS/2 mouse interface, serial ports (2) | 
| NPU Options | 80387SX (exact location unidentified) | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| External battery | J1 | Ready LED | J16 | 
| IDE interface LED | J3 | Serial port 1 | J18 | 
| Front panel connector | J6 | Serial port 2 | J20 | 
| PS/2 mouse interface | J8 | Speaker | J22 | 
| Auxiliary keyboard connector | J9 | Reset switch | J23 | 
| IDE interface | J10 | IDE access LED | J24 | 
| Floppy drive interface | J11 | Power LED & keylock | J40 | 
| Parallel port | J15 | ||
| USER CONFIGURABLE SETTINGS | |||
| Function | Label | Position | |
| » | CMOS memory normal operation | J2 | Open | 
| CMOS memory clear | J2 | Closed | |
| » | Factory configured - do not alter (oscillators enabled) | J7 | Open | 
| Factory configured - do not alter (oscillators disabled) | J7 | Closed | |
| PS/2 mouse CLK enabled | J12 | Pins 2 & 3 closed | |
| PS/2 mouse CLK disabled | J12 | Pins 1 & 2 closed | |
| PS/2 mouse data enabled | J13 | Pins 1 & 2 closed | |
| PS/2 mouse data disabled | J13 | Pins 2 & 3 closed | |
| PS/2 mouse IRQ12 enabled | J17 | Closed | |
| PS/2 mouse IRQ12 disabled | J17 | Open | |
| » | Pipeline mode enabled | J19 | Closed | 
| Pipeline mode disabled | J19 | Open | |
| » | Monitor type select EGA/VGA | J21 | Pins 2 & 3 closed | 
| Monitor type select monochrome | J21 | Pins 1 & 2 closed | |
| » | Factory configured - do not alter | J25 | Unidentified | 
| » | Factory configured - do not alter (80387SX ready signal) | J27 | Closed | 
| » | Factory configured - do not alter | J53 | Unidentified | 
| » | IDE interface enabled | S1/1 | On | 
| IDE interface disabled | S1/1 | Off | |
| » | IDE IOCHRDY signal from pin 21 (Seagate/CDC/Imprimis/Miniscribe) | S1/2 | On | 
| » | IDE IOCHRDY signal from pin 27 (Quantum) | S1/3 | On | 
| » | Factory configured - do not alter | S1/4 | Not used | 
| » | Floppy drive interface enabled | S1/5 | On | 
| Floppy drive interface disabled | S1/5 | Off | |
| » | Floppy drive change signal enabled | S1/6 | On | 
| Floppy drive change signal disabled | S1/6 | Off | |
| » | Floppy drive speed select single speed | S1/7 | Off | 
| Floppy drive speed select two speed | S1/7 | On | |
| » | Floppy drive pre-compensation value select 125ns | S1/8 | Off | 
| Floppy drive pre-compensation value select 187ns | S1/8 | On | |
| » | Factory configured - do not alter | S4/4 | Not used | 
| Note: If using a Conner or Western Digital drive, ignore settings for S1/2 & S1/3. | |||
| DRAM CONFIGURATION | ||||
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | 
| 512KB | (2) 256K x 9 | None | None | None | 
| 1MB | (2) 256K x 9 | (2) 256K x 9 | None | None | 
| 2MB | (2) 256K x 9 | (2) 256K x 9 | (2) 256K x 9 | (2) 256K x 9 | 
| 2MB | (2) 1M x 9 | None | None | None | 
| 3MB | (2) 256K x 9 | (2) 256K x 9 | (2) 1M x 9 | None | 
| 4MB | (2) 1M x 9 | (2) 1M x 9 | None | None | 
| 5MB | (2) 256K x 9 | (2) 256K x 9 | (2) 1M x 9 | (2) 1M x 9 | 
| 6MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | None | 
| 8MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | 
| DMA CHANNEL SELECTION | ||
| Channel | J26 | |
| » | High | Pins 1 & 2 closed | 
| Low | Pins 2 & 3 closed | |
| PARALLEL PORT LPT/IRQ SELECTION | ||||||
| LPT/IRQ | S4/1 LPT1 | S4/2 LPT2 | S4/3 LPT3 | S4/5 IRQ5 | S4/6 IRQ7 | |
| Disabled | Off | Off | Off | Off | Off | |
| » | LPT1/IRQ7 | On | Off | Off | Off | On | 
| LPT2/IRQ5 | Off | On | Off | On | Off | |
| LPT/IRQ7 | Off | Off | On | Off | On | |
| SERIAL PORT 1 COM/IRQ SELECTION | |||||||
| COM/IRQ | S3/1 COM1 | S3/2 COM2 | S3/3 COM3 | S3/4 COM4 | S3/5 IRQ3 | S3/6 IRQ4 | |
| Disabled | Off | Off | Off | Off | Off | Off | |
| » | COM1/IRQ4 | On | Off | Off | Off | Off | On | 
| COM2/IRQ3 | Off | On | Off | Off | On | Off | |
| COM3/IRQ4 | Off | Off | On | Off | Off | On | |
| COM4/IRQ3 | Off | Off | Off | On | On | Off | |
| SERIAL PORT 2 COM/IRQ SELECTION | |||||||
| COM/IRQ | S2/1 COM1 | S2/2 COM2 | S2/3 COM3 | S2/4 COM4 | S2/5 IRQ3 | S2/6 IRQ4 | |
| Disabled | Off | Off | Off | Off | Off | Off | |
| COM1/IRQ4 | On | Off | Off | Off | Off | On | |
| » | COM2/IRQ3 | Off | On | Off | Off | On | Off | 
| COM3/IRQ4 | Off | Off | On | Off | Off | On | |
| COM4/IRQ3 | Off | Off | Off | On | On | Off | |