ATC/UNITRON COMPUTER & COMPUTER PARTS
U 6983
Processor | Pentium |
Processor Speed | 75/90/100/120/133/150MHz |
Chip Set | Unidentified |
Max. Onboard DRAM | 256MB |
Cache | 256/512/1024KB |
BIOS | Award |
Dimensions | 330mm x 218mm |
I/O Options | 32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse interface, serial ports (2), cache slot |
NPU Options | None |

CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Turbo LED | J1 | Parallel port | J12 |
Turbo switch | J2 | Serial port 2 | J13 |
Reset switch | J3 | IDE interface LED 2 | J14 |
Speaker | J4 | IDE interface LED 1 | J15 |
Power LED & keylock | J5 | IR connector | JP32 |
Green PC connector | J6 | PS/2 mouse interface (optional) | MS2 |
IDE interface 2 | J7 | 32-bit PCI slots | PC1 - PC4 |
IDE interface 1 | J8 | Chassis fan power | PS1 |
Serial port 1 | J10 | Cache slot | SL1 |
Floppy drive interface | J11 |
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USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | CMOS memory normal operation | JP5 | pins 1 & 2 closed |
| CMOS memory clear | JP5 | pins 2 & 3 closed |
» | Factory configured - do not alter | JP8 | N/A |
» | Factory configured - do not alter | JP10 | N/A |
» | BIOS type select EPROM | JP13 | Open |
| BIOS type select 5v flash | JP13 | pins 1 & 2 closed |
| BIOS type select 12v flash | JP13 | pins 2 & 3 closed |
» | Factory configured - do not alter | JP19 | N/A |
» | Factory configured - do not alter | JP22 | N/A |
» | Factory configured - do not alter | JP23 | N/A |
» | Factory configured - do not alter | JP30 | N/A |
DRAM CONFIGURATION | ||
Size | Bank 0/0A | Bank 1 |
1MB* | (1) 256K x 36 | NONE |
2MB* | (1) 512K x 36 | NONE |
4MB* | (1) 1M x 36 | NONE |
8MB* | (1) 2M x 36 | NONE |
16MB* | (1) 4M x 36 | NONE |
32MB* | (1) 8M x 36 | NONE |
64MB* | (1) 16M x 36 | NONE |
2MB | (2) 256K x 36 | NONE |
4MB | (2) 512K x 36 | NONE |
4MB | (2) 256K x 36 | (2) 256K x 36 |
6MB | (2) 512K x 36 | (2) 256K x 36 |
6MB | (2) 256K x 36 | (2) 512K x 36 |
8MB | (2) 1M x 36 | NONE |
8MB | (2) 512K x 36 | (2) 512K x 36 |
10MB | (2) 1M x 36 | (2) 256K x 36 |
10MB | (2) 256K x 36 | (2) 1M x 36 |
DRAM CONFIGURATION (CON'T) | ||
Size | Bank 0/0A | Bank 1 |
12MB | (2) 1M x 36 | (2) 512K x 36 |
12MB | (2) 512K x 36 | (2) 1M x 36 |
16MB | (2) 2M x 36 | NONE |
16MB | (2) 1M x 36 | (2) 1M x 36 |
18MB | (2) 2M x 36 | (2) 256K x 36 |
18MB | (2) 256K x 36 | (2) 2M x 36 |
20MB | (2) 2M x 36 | (2) 512K x 36 |
20MB | (2) 512K x 36 | (2) 2M x 36 |
24MB | (2) 2M x 36 | (2) 1M x 36 |
24MB | (2) 1M x 36 | (2) 2M x 36 |
32MB | (2) 4M x 36 | NONE |
32MB | (2) 2M x 36 | (2) 2M x 36 |
34MB | (2) 4M x 36 | (2) 256K x 36 |
34MB | (2) 256K x 36 | (2) 4M x 36 |
36MB | (2) 4M x 36 | (2) 512K x 36 |
36MB | (2) 512K x 36 | (2) 4M x 36 |
40MB | (2) 4M x 36 | (2) 1M x 36 |
40MB | (2) 1M x 36 | (2) 4M x 36 |
48MB | (2) 4M x 36 | (2) 2M x 36 |
48MB | (2) 2M x 36 | (2) 4M x 36 |
64MB | (2) 8M x 36 | NONE |
64MB | (2) 4M x 36 | (2) 4M x 36 |
66MB | (2) 8M x 36 | (2) 256K x 36 |
66MB | (2) 256K x 36 | (2) 8M x 36 |
68MB | (2) 8M x 36 | (2) 512K x 36 |
68MB | (2) 512K x 36 | (2) 8M x 36 |
72MB | (2) 8M x 36 | (2) 1M x 36 |
72MB | (2) 1M x 36 | (2) 8M x 36 |
80MB | (2) 8M x 36 | (2) 2M x 36 |
80MB | (2) 2M x 36 | (2) 8M x 36 |
96MB | (2) 8M x 36 | (2) 4M x 36 |
96MB | (2) 4M x 36 | (2) 8M x 36 |
128MB | (2) 8M x 36 | (2) 8M x 36 |
128MB | (2) 16M x 36 | NONE |
130MB | (2) 16M x 36 | (2) 256K x 36 |
132MB | (2) 16M x 36 | (2) 512K x 36 |
136MB | (2) 16M x 36 | (2) 1M x 36 |
144MB | (2) 16M x 36 | (2) 2M x 36 |
160MB | (2) 16M x 36 | (2) 4M x 36 |
192MB | (2) 16M x 36 | (2) 8M x 36 |
256MB | (2) 16M x 36 | (2) 16M x 36 |
Note: Sizes with an * present use only Bank 0A. | ||
CACHE CONFIGURATION | |||
Size | Bank 0 | TAG | SL1 |
256KB (A) | (8) 32K x 8 | (1) 16K x 8 | Not installed |
256KB (B) | NONE | NONE | Installed |
512KB (A) | (8) 64K x 8 | (1) 16K x 8 | Not installed |
512KB (B) | NONE | NONE | Installed |
1MB | (8) 128K x 8 | (1) 32K x 8 | Not installed |
CACHE JUMPER CONFIGURATION | ||
Size | JP8 | JP10 |
256KB | pins 1 & 2 closed | pins 2 & 3 closed |
512KB | pins 1 & 2, 3 & 4 closed | Open |
1MB | pins 2 & 3 closed | pins 1 & 2 closed |
Note: If SL1 is used, these jumpers are ignored. | ||
CPU SPEED CONFIGURATION | |
Speed | JP16 |
75MHz | Open |
90MHz | pins 1 & 2 closed |
100MHz | pins 1 & 2, 3 & 4 closed |
120MHz | pins 1 & 2 closed |
133MHz | pins 1 & 2, 3 & 4 closed |
150MHz | pins 1 & 2 closed |
CPU SPEED CONFIGURATION | ||
Speed | JP9 | JP12 |
1.5x | Open | Open |
2x | Closed | Open |
2.5x | Closed | Closed |
CPU VOLTAGE CONFIGURATION | ||
Voltage | JP17 | |
» | 3.3v | pins 1 & 2 closed |
» | 3.4v | pins 2 & 3 closed |
» | 3.55v | pins 4 & 5 closed |
DMA CONFIGURATION | |
DMA | JP29 |
DMA 1 | pins 1 & 3, 2 & 4 closed |
DMA 3 | pins 3 & 5, 4 & 6 closed |