DIAMOND FLOWER, INC.
486SX-20/25UNB AIO
|
Processor |
80486SX/80487SX |
|
Processor Speed |
20/25MHz |
|
Chip Set |
UMC |
|
Max. onboard DRAM |
16MB |
|
Cache |
None |
|
BIOS |
AMI |
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Dimensions |
330mm x 218mm |
|
I/O Options |
Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial port (2), VGA feature connector, VGA port |
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NPU Options |
None |
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CONNECTIONS |
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|
Purpose |
Location |
Purpose |
Location |
|
IDE interface |
CN1 |
Turbo switch |
J3 & J8 |
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Floppy drive interface |
CN2 |
Reset switch |
J4 & J9 |
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VGA feature connector |
CN3 |
IDE interface LED |
J5 |
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VGA port |
CN4 |
Power LED & keylock |
J6 |
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Parallel port |
CN5 |
Speaker |
J7 |
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Bus mouse port |
CN6 |
External battery |
J10 |
|
Serial port (COM1) |
CN7 |
Serial port (COM2) |
JP31 |
|
Keyboard connector |
J1 |
Keyboard connector |
KBD1 |
|
Turbo LED |
J2 |
Riser card |
S1 |
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USER CONFIGURABLE SETTINGS |
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|
Function |
Jumper |
Position |
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|
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Battery select internal |
J11 |
pins 2 & 3 closed |
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|
Battery select external |
J11 |
pins 1 & 2 closed |
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|
Speaker select internal |
JP1 |
Closed |
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Speaker select external |
JP1 |
Open |
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|
Factory configured - do not alter |
JP4 |
Open |
|
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Factory configured - do not alter |
JP5 |
pins 2 & 3 closed |
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|
CPU speed select 20MHz |
JP6 |
Closed |
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CPU speed select 25MHz |
JP6 |
Open |
|
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Factory configured - do not alter |
JP7 |
Open |
|
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BIOS type select 27C256 (32KB) |
JP8 |
pins 2 & 3 closed |
|
|
BIOS type select 27C512 (64KB) |
JP8 |
pins 1 & 2 closed |
|
|
Factory configured - do not alter |
JP10 |
Open |
|
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Monitor type select color |
JP11 |
Closed |
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Monitor type select monochrome |
JP11 |
Open |
|
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Factory configured - do not alter |
JP13 |
Open |
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Factory configured - do not alter |
JP14 |
Closed |
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Floppy drive interface enabled |
JP20 |
pins 1 & 2 closed |
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Floppy drive interface disabled |
JP20 |
pins 2 & 3 closed |
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Factory configured - do not alter |
JP21 |
pins 1 & 2 closed |
|
|
IDE interface enabled |
JP22 |
pins 1 & 2 closed |
|
|
IDE interface disabled |
JP22 |
pins 2 & 3 closed |
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DRAM CONFIGURATION |
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|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
1MB |
(1) 256K x 36 |
NONE |
NONE |
NONE |
|
2MB |
(1) 256K x 36 |
(1) 256K x 36 |
NONE |
NONE |
|
3MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
NONE |
|
4MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
|
4MB |
(1) 1M x 36 |
NONE |
NONE |
NONE |
|
5MB |
(1) 256K x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
6MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 1M x 36 |
NONE |
|
8MB |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
9MB |
(1) 256K x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
|
10MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
12MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
|
16MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
SERIAL PORT CONFIGURATION |
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|
Port 1 (C2) |
Port 2 (C1) |
JP17 |
JP18 |
JP19 |
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|
|
COM1 |
COM2 |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
|
COM1 |
Disabled |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
|
Disabled |
COM2 |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
|
`COM2 |
Disabled |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
|
COM2 |
COM1 |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
|
Disabled |
COM1 |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
|
Disabled |
Disabled |
pins 2 & 3 closed |
pins 2 & 3 closed |
Open |
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SERIAL PORTS 1 & 2 NORMAL/FORCED TRUE CONFIGURATION |
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|
Port 1 (CN7) |
Port 2 (JP31) |
JP24 |
JP25 |
JP26 |
|
Normal |
Normal |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
Forced true |
Forced true |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
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SERIAL PORT DTE/DCE CONFIGURATION |
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|
Function |
JP30 |
|
|
|
Serial Port 1 (CN7) DTE |
Pins 1 & 2, 3 & 4, and 5 & 6 closed |
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|
Serial Port 1 (CN7)DCE |
Pins 1 & 3, 2 & 4, and 6 & 8 closed |
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SERIAL PORT DTE/DCE CONFIGURATION |
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|
Function |
JP23 |
|
|
|
Serial Port 2 (JP23) DTE |
Pins 7 & 8 and 9 & 10 closed |
|
|
Serial Port 2 (JP23) DCE |
Pins 5 & 7 and 9 & 10 closed |
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PARALLEL PORT 1 (CN5) CONFIGURATION |
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|
LPT |
I/O Address |
Interrupt |
JP9 |
JP15 |
JP16 |
|
LPT 1 |
3BC-3BEh |
IRQ7 |
pins 1 & 2 |
pins 2 & 3 |
pins 1 & 2 |
|
LPT 2 |
378-37Ah |
IRQ7 |
pins 1 & 2 |
pins 1 & 2 |
pins 1 & 2 |
|
LPT 3 |
278-27Ah |
IRQ5 |
pins 2 & 3 |
pins 1 & 2 |
pins 2 & 3 |
|
Disabled |
N/A |
N/A |
N/A |
pins 2 & 3 |
pins 2 & 3 |
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Note:Pins designated should be in the closed position. |
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VRAM CONFIGURATION |
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|
Size |
VRAM |
Location |
|
512KB |
(4) 44256 |
Bank 0 |
|
1024KB |
(8) 44256 |
Bank 0 & 1 |
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ONBOARD VGA CONFIGURATION |
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|
Mode |
IRQ |
JP2 |
JP3 |
JP12 |
|
|
|
Enabled |
2/9 |
pins 2 & 3 closed |
pins 1 & 2 closed |
Closed |
|
|
Disabled |
2/9 |
Closed |
Open |
Open |