S 500 Motherboard Settings and Configuration
SAMSUNG ELECTRONICS, INC.
S 500
Processor | 80286 |
Processor Speed | 16/20MHz |
Chip Set | Unidentified |
Video Chip Set | None |
Maximum Onboard Memory | 1MB |
Maximum Video Memory | None |
Cache | None |
BIOS | Unidentified |
Dimensions | 355mm x 304mm |
I/O Options | Floppy drive interface, parallel port, serial ports (2) |
NPU Options | 80287 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Parallel port | CN1 | External battery | JP2 |
Serial port 1 | CN2 | Keyboard connector | JP17 |
Serial port 2 | CN3 | Power LED & keylock | JP18 |
Floppy drive interface | CN4 | Speaker | JP20 |
USER CONFIGURABLE SETTINGS | |||
Function | Label | Position | |
Parallel port enabled | JP1 | Closed | |
Parallel port disabled | JP1 | Open | |
Serial port 1 enabled | JP3 | Closed | |
Serial port 1 disabled | JP3 | Open | |
Serial port 2 enabled | JP4 | Closed | |
Serial port 2 disabled | JP4 | Open | |
Floppy drive secondary address enabled | JP5 | Closed | |
Floppy drive primary address enabled | JP5 | Open | |
Floppy drive speed select dual speed | JP7 | Closed | |
Floppy drive speed select single speed | JP7 | Open | |
Precompensation value select 187ns | JP8 | Closed | |
Precompensation value select 125ns | JP8 | Open | |
DMA CLOCK = DMA CLOCK | JP13 | Pins 1 & 2 closed | |
DMA CLOCK = SYS CLOCK | JP13 | Pins 2 & 3 closed | |
BIOS type select 27256 | JP14 | Pins 1 & 2 closed | |
BIOS type select 27128 | JP14 | Pins 2 & 3 closed | |
ROM enable signal select XMER signal | JP15 | Pins 1 & 2 closed | |
ROM enable signal select LCSROM signal | JP15 | Pins 2 & 3 closed | |
» | Factory configured - do not alter | JP19 | Unidentified |
Monitor type select color | SW1 | Up | |
Monitor type select monochrome | SW1 | Down | |
DRAM CONFIGURATION | ||||
Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
256KB | (9) 41256 | None | None | None |
512KB | (9) 41256 | (9) 41256 | None | None |
640KB | (9) 41256 | (9) 41256 | (9) 4164 | None |
1MB | (9) 41256 | (9) 41256 | (9) 41256 | (9) 41256 |
Note: The location of banks 0, 1, 2 & 3 are unidentified. | ||||
DRAM JUMPER CONFIGURATION | ||
Size | JP10 | JP11 |
256KB | Pins 2 & 3 closed | Pins 2 & 3 closed |
512KB | Pins 2 & 3 closed | Pins 1 & 2 closed |
640KB | Pins 1 & 2 closed | Pins 2 & 3 closed |
1MB | Pins 1 & 2 closed | Pins 1 & 2 closed |
CPU SPEED SELECTION | |
Speed | JP16 |
16MHz | Open |
20MHz | Pins 1 & 2 closed |
16/20MHz (through keyboard) | Pins 2 & 3 closed |
ON BOARD FLOPPY DRIVE SELECTION | ||
Setting | JP6 | JP9 |
Enabled | Closed | Closed |
Disabled | Open | Open |
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