MONOLITHIC SYSTEMS, INC. (COLORADO MSI)
MICROFRAME 486M
Processor | 80486DX |
Processor Speed | 25MHz |
Chip Set | C & T |
Max. Onboard DRAM | 8MB |
Cache | None |
BIOS | Quadtel |
Dimensions | 330.2mm x 221mm |
I/O Options | 32-bit external memory card slot |
NPU Options | 4167 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | J1 | Turbo LED | J10 |
Drive active LED | J3 | CPU ready LED | J11 |
Front panel ribbon cable | J6 | Speaker | J19 |
Reset switch | J7 | Power LED & keylock | J40 |
Auxiliary keyboard | J8 | 32-bit external memory card | S1 |
Note:If the front panel Drive LED is to be used, the drive active signal from the drive or drive controller must be connected to J3/pins 1 & 2 or J3/pins 2 & 3. |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | CMOS memory normal operation | J2 | Open |
CMOS memory clear | J2 | Closed | |
» | DMA active signal select high | J12 | Closed |
DMA active signal select low | J12 | Open | |
» | NPU parity check enabled | J13 | Closed |
NPU parity check disabled | J13 | Open | |
» | Internal CPU cache enabled | J16 | Closed |
Internal CPU cache disabled | J16 | Open | |
» | NPU zero wait state enabled | J17 | Closed |
NPU zero wait state disabled | J17 | Open | |
» | Internal CPU caching of BIOS disabled | J18 | pins 1 & 2 open |
Internal CPU caching of BIOS enabled | J18 | pins 1 & 2 closed | |
Í Factory test jumper- do not alter | J24 | Closed | |
» | POST enabled | J25 | Closed |
POST disabled | J25 | Open | |
» | Factory test jumper - do not alter | J26 | Closed |
» | NPU disabled | J33 | Open |
NPU enabled | J33 | Closed | |
» | Factory test jumper - do not alter | J34 | Closed |
» | Factory test jumper - do not alter | J35 | Closed |
» | Factory test jumper - do not alter | J36 | Closed |
» | Monitor type select color | J39 | pins 2 & 3 closed |
Monitor type select monochrome | J39 | pins 1 & 2 closed | |
Note:Locations of J18, J34, J35, & J36 are unknown. |
DRAM CONFIGURATION | ||
Size | Bank 0 | Bank 1 |
1MB | (4) 256K x 9 | NONE |
2MB | (4) 256K x 9 | (4) 256K x 9 |
4MB | (4) 1M x 9 | NONE |
8MB | (4) 1M x 9 | (4) 1M x 9 |
J6 - RIBBON CABLE CONNECTOR PIN ASSIGNMENTS |