NIAGARA SMD TECHNOLOGY, INC.
NT924 (REV. 2)
Processor | AM K5/CX M1/Pentium |
Processor Speed | 75/90/100/120/133/150/166/180/200MHz |
Chip Set | Intel |
Maximum Onboard Memory | 128MB |
Cache | 256/512KB |
BIOS | Award/Phoenix |
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, IR connector |
NPU Options | None |

CONNECTIONS | |||
Function | Label | Function | Label |
IDE interface 1 | IDE1 | IDE interface LED | J13 |
IDE interface 2 | IDE2 | Green PC LED | J14 |
PS/2 mouse interface | J3 | Turbo LED | J15 |
Serial port 1 | J4 | Reset switch | J16 |
Serial port 2 | J6 | Speaker | J17 |
Floppy drive interface | J7 | Power LED & keylock | J18 |
Parallel port | J8 | IR connector | JP2 |
Chassis fan power | J9 | 32-bit PCI slots | PC1 - PC4 |
Green PC connector | J12 | Cache slot | SL1 |
USER CONFIGURABLE SETTINGS | |||
Setting | Label | Position | |
Keyboard clock select depends on ISA clock | JP4 | Pins 1 & 2 closed | |
Keyboard clock select set at 12MHz | JP4 | Pins 2 & 3 closed | |
BIOS type select normal operation | JP6 | Pins 1 & 2 closed | |
BIOS type select flash mode | JP6 | Pins 2 & 3 closed | |
» | Flash BIOS voltage select 5v | JP7 | Pins 1 & 2 closed |
Flash BIOS voltage select 12v | JP7 | Pins 2 & 3 closed | |
DRAM CONFIGURATION | ||
Size | Bank 0 | Bank 1 |
8MB | (2) 1M x 32 | None |
8MB | (2) 512K x 32 | (2) 512K x 32 |
10MB | (2) 1M x 32 | (2) 256K x 32 |
10MB | (2) 256K x 32 | (2) 1M x 32 |
12MB | (2) 1M x 32 | (2) 512K x 32 |
12MB | (2) 512K x 32 | (2) 1M x 32 |
16MB | (2) 2M x 32 | None |
16MB | (2) 1M x 32 | (2) 1M x 32 |
18MB | (2) 2M x 32 | (2) 256K x 32 |
18MB | (2) 256K x 32 | (2) 2M x 32 |
20MB | (2) 2M x 32 | (2) 512K x 32 |
20MB | (2) 512K x 32 | (2) 2M x 32 |
24MB | (2) 2M x 32 | (2) 1M x 32 |
24MB | (2) 1M x 32 | (2) 2M x 32 |
32MB | (2) 4M x 32 | None |
32MB | (2) 2M x 32 | (2) 2M x 32 |
34MB | (2) 4M x 32 | (2) 256K x 32 |
34MB | (2) 256K x 32 | (2) 4M x 32 |
36MB | (2) 4M x 32 | (2) 512K x 32 |
36MB | (2) 512K x 32 | (2) 4M x 32 |
40MB | (2) 4M x 32 | (2) 1M x 32 |
40MB | (2) 1M x 32 | (2) 4M x 32 |
48MB | (2) 4M x 32 | (2) 2M x 32 |
48MB | (2) 2M x 32 | (2) 4M x 32 |
64MB | (2) 8M x 32 | None |
64MB | (2) 4M x 32 | (2) 4M x 32 |
66MB | (2) 8M x 32 | (2) 256K x 32 |
66MB | (2) 256K x 32 | (2) 8M x 32 |
68MB | (2) 8M x 32 | (2) 512K x 32 |
68MB | (2) 512K x 32 | (2) 8M x 32 |
72MB | (2) 8M x 32 | (2) 1M x 32 |
72MB | (2) 1M x 32 | (2) 8M x 32 |
DRAM CONFIGURATION | ||
Size | Bank 0 | Bank 1 |
80MB | (2) 8M x 32 | (2) 2M x 32 |
80MB | (2) 2M x 32 | (2) 8M x 32 |
96MB | (2) 8M x 32 | (2) 4M x 32 |
96MB | (2) 4M x 32 | (2) 8M x 32 |
128MB | (2) 8M x 32 | (2) 8M x 32 |
Note: Board accepts EDO memory. | ||
CACHE CONFIGURATION | ||||
Size | Bank 0 | Bank 1 | TAG | SL1 |
256KB (A) | (2) 32K x 32 | None | (1) 8K/16K x 8 | Not installed |
256KB (B) | None | None | None | 256KB module installed |
512KB (A) | (2) 32K x 32 | (2) 32K x 32 | (1) 16K/32K x 8 | Not installed |
512KB (B) | None | None | None | 512KB module installed |
Note: The location of banks 0 & 1 are unidentified. | ||||
CACHE JUMPER CONFIGURATION | ||
Size | JP10 | JP11 |
256KB (A/B) | Pins 1 & 2 closed | Pins 1 & 2 closed |
512KB (A/B) | Pins 2 & 3 closed | Pins 2 & 3 closed |
CPU SPEED SELECTION (CYRIX) | |||||||
CPU speed | Clock speed | Multiplier | JP3 | JP12 | JP13 | JPS1 | JPS2 |
120MHz | 50MHz | 2x | 1 & 2 | 2 & 3 | 1 & 2 | Closed | Closed |
150MHz | 60MHz | 2x | 2 & 3 | 2 & 3 | 1 & 2 | Closed | Open |
166MHz | 66MHz | 2x | 2 & 3 | 2 & 3 | 1 & 2 | Open | Closed |
Note: Pins designated should be in the closed position. | |||||||
CPU SPEED SELECTION (INTEL) | |||||||
CPU speed | Clock speed | Multiplier | JP3 | JP12 | JP13 | JPS1 | JPS2 |
75MHz | 50MHz | 1.5x | 1 & 2 | 2 & 3 | 2 & 3 | Closed | Closed |
90MHz | 60MHz | 1.5x | 2 & 3 | 2 & 3 | 2 & 3 | Closed | Open |
100MHz | 66MHz | 1.5x | 2 & 3 | 2 & 3 | 2 & 3 | Open | Closed |
120MHz | 60MHz | 2x | 2 & 3 | 2 & 3 | 1 & 2 | Closed | Open |
133MHz | 66MHz | 2x | 2 & 3 | 2 & 3 | 1 & 2 | Open | Closed |
150MHz | 60MHz | 2.5x | 2 & 3 | 1 & 2 | 1 & 2 | Closed | Open |
166MHz | 66MHz | 2.5x | 2 & 3 | 1 & 2 | 1 & 2 | Open | Closed |
180MHz | 60MHz | 3x | 2 & 3 | 1 & 2 | 2 & 3 | Closed | Open |
200MHz | 66MHz | 3x | 2 & 3 | 1 & 2 | 2 & 3 | Open | Closed |
Note: Pins designated should be in the closed position. | |||||||
CPU TYPE SELECTION | ||||
Setting | JP8A | JP8B | JP8C | JP8D |
CX M1 | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 1 & 2 closed |
AM K5 | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 1 & 2 closed |
P54C/CTB | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 1 & 2 closed |
P55C | Pins 2 & 3 closed | Pins 2 & 3 closed | Pins 2 & 3 closed | Pins 2 & 3 closed |