ACER, INC.
V55-2
|
Device Type |
Mainboard |
|
Processor |
Pentium/Pentium MMX/ CX 6x86/AM K5/IBM 6x86 |
|
Processor Speed |
75/90/100/120/133/150/166/200 MHz |
|
Chip Set |
Unidentified |
|
Maximum Onboard Memory |
128MB (EDO & SDRAM supported) |
|
Cache |
256/512KB |
|
BIOS |
Unidentified |
|
Dimensions |
254mm x 218mm |
|
I/O Options (CPU) |
32-bit ISA slots (3), 32-bit PCI slots (4), bus mouse port, PS/2 keyboard port, serial ports (2), parallel port |
|
CONNECTIONS |
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|
Purpose |
Location |
Purpose |
Location |
|
Standby power connector |
CN1 |
Speaker |
CN16/pins 7 - 10 |
|
Serial port 2 |
CN2 |
Turbo LED |
CN16/pins 12 & 13 |
|
Serial port 1 |
CN3 |
Reset |
CN16/pins 19 & 20 |
|
Parallel port |
CN4 |
External suspend switch |
CN17 |
|
Floppy drive interface |
CN5 |
Software shutdown switch |
CN18 |
|
IDE interface 2 |
CN6 |
IrDA connector |
CN19 |
|
IDE interface 1 |
CN9 |
IDE interface LED |
CN20 |
|
CPU power shorting block |
CN13 |
PS/2 mouse port |
CN21 |
|
CPU fan connector |
CN14 |
32-bit PCI expansion slots |
PC1-PC4 |
|
Keylock |
CN16/pins 1 & 2 |
Cache slot |
SL1 |
|
Power LED |
CN16/pins 3 - 5 |
|
|
|
USER CONFIGURABLE SETTINGS |
|||
|
Function |
Label |
Position |
|
|
|
ROM type select Flash ROM |
JP4 |
Pins 2 & 3 closed |
|
|
ROM type select EPROM |
JP4 |
Pins 1 & 2 closed |
|
|
CPU core voltage select 2.8v |
JP6 |
Pins 2 & 3 closed |
|
|
CPU core voltage select 3.2v |
JP6 |
Pins 1 & 2 closed |
|
|
CPU I/O voltage select 3.3v |
JP7 |
Pins 2 & 3 closed |
|
|
CPU I/O voltage select 3.5v |
JP7 |
Pins 1 & 2 closed |
|
|
Factory configured - do not alter |
JP10 |
Pins 2 & 3 closed |
|
|
CMOS discharge normal |
JP11 |
Open |
|
|
CMOS discharge clear |
JP11 |
Closed |
|
ROM BRAND SELECTION |
||
|
Brand |
JP5 |
|
|
|
29EE010 |
Pins 2 & 3 closed |
|
|
NC |
Pins 1 & 2 closed |
|
|
29F001 |
Pins 3 & 4 closed |
|
SIMM CONFIGURATION |
||
|
Size |
Bank 0 |
Bank 1 |
|
8MB |
(2) 1M x 32 |
None |
|
16MB |
(2) 2M x 32 |
None |
|
16MB |
(2) 1M x 32 |
(2) 1M x 32 |
|
24MB |
(2) 2M x 32 |
(2) 1M x 32 |
|
32MB |
(2) 4M x 32 |
None |
|
32MB |
(2) 2M x 32 |
(2) 2M x 32 |
|
40MB |
(2) 4M x 32 |
(2) 1M x 32 |
|
48MB |
(2) 4M x 32 |
(2) 2M x 32 |
|
64MB |
(2) 8M x 32 |
None |
|
64MB |
(2) 4M x 32 |
(2) 4M x 32 |
|
72MB |
(2) 8M x 32 |
(2) 1M x 32 |
|
80MB |
(2) 8M x 32 |
(2) 2M x 32 |
|
96MB |
(2) 8M x 32 |
(2) 4M x 32 |
|
128MB |
(2) 8M x 32 |
(2) 8M x 32 |
|
CACHE CONFIGURATION |
|||
|
Size |
SL1 |
Tag |
Bank 0 |
|
256KB |
(2) 32K x 32 |
(8) 32K x 32 |
(2) 32K x 32 |
|
512KB |
(4) 32K x 32 |
(8) 32K x 32 |
(4) 32K x 32 |
|
512KB |
(2) 64K x 32 |
(8) 32K x 32 |
(2) 64K x 32 |
|
Note: The location of Tag SRAM is unidentified. |
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|
CACHE JUMPER CONFIGURATION |
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|
Size |
JP8 |
JP9 |
|
|
|
256KB |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
|
512KB |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
CPU FREQUENCY SELECTION (INTEL) |
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|
CPU |
Clock Speed |
Clock Ratio |
SW1/1 |
SW1/2 |
SW1/3 |
SW1/4 |
|
75MHz |
50MHz |
1.5x |
Off |
Off |
On |
On |
|
90MHz |
60MHz |
1.5x |
Off |
Off |
Off |
On |
|
100MHz |
66MHz |
1.5x |
Off |
Off |
On |
Off |
|
120MHz |
60MHz |
2x |
Off |
On |
Off |
On |
|
133MHz |
66MHz |
2x |
Off |
On |
On |
Off |
|
150MHz |
60MHz |
2.5x |
On |
On |
Off |
On |
|
166MHz |
66MHz |
2.5x |
On |
On |
On |
Off |
|
CPU FREQUENCY SELECTION (INTEL MMX) |
||||||
|
CPU |
Clock Speed |
Clock Ratio |
SW1/1 |
SW1/2 |
SW1/3 |
SW1/4 |
|
166MHz |
66MHz |
2.5x |
On |
On |
On |
Off |
|
180MHz |
60MHz |
3x |
On |
Off |
Off |
On |
|
200MHz |
66MHz |
3x |
On |
Off |
On |
Off |
|
CPU FREQUENCY SELECTION (AM K5) |
||||||
|
CPU |
Clock Speed |
Clock Ratio |
SW1/1 |
SW1/2 |
SW1/3 |
SW1/4 |
|
75MHz |
50MHz |
1.5x |
Off |
Off |
On |
On |
|
90MHz |
60MHz |
1.5x |
Off |
Off |
Off |
On |
|
100MHz |
66MHz |
1.5x |
Off |
Off |
On |
Off |
|
120MHz |
60MHz |
2x |
Off |
On |
Off |
On |
|
133MHz |
66MHz |
2x |
Off |
On |
On |
Off |
|
150MHz |
60MHz |
2.5x |
On |
On |
Off |
On |
|
166MHz |
66MHz |
2.5x |
On |
On |
On |
Off |
|
CPU FREQUENCY SELECTION (CX 6X86) |
||||||
|
CPU |
Host Bus |
Clock Ratio |
SW1/1 |
SW1/2 |
SW1/3 |
SW1/4 |
|
120MHz |
50MHz |
2x |
Off |
On |
On |
On |
|
150MHz |
60MHz |
2x |
Off |
On |
Off |
On |
|
166MHz |
66MHz |
2x |
Off |
On |
On |
Off |
|
CPU FREQUENCY SELECTION (IBM 6X86) |
||||||
|
CPU |
Host Bus |
Clock Ratio |
SW1/1 |
SW1/2 |
SW1/3 |
SW1/4 |
|
120MHz |
50MHz |
2x |
Off |
On |
On |
On |
|
150MHz |
60MHz |
2x |
Off |
On |
Off |
On |
|
166MHz |
66MHz |
2x |
Off |
On |
On |
Off |