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# AMPRO COMPUTERS, INC.
LITTLE BOARD/486I
Processor 80486DX2/80486DX4
Processor Speed 50(internal)/100(internal)MHz
Chip Set OPTI
Video Chip Set Unidentified
Maximum Onboard 64MB
Memory
Maximum Video 1MB
Memory
Cache None
BIOS Award
Dimensions 203mm x 146mm
I/O Options Ethernet 10BaseT connector, AUI connector,
floppy drive interface, IDE interface,
SCSI-II interface, parallel port, serial
ports (4), VGA interface, flat panel
connector, external video overlay, LCD bias
supply, PC/104 connectors (2),
utility/keyboard connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+----------+--------------------+----------|
| Flat panel | J3 | Serial port 1 & 2 | J11 |
| connector | | | |
|-----------------+----------+--------------------+----------|
| LCD bias supply | J4 | IDE interface | J12 |
|-----------------+----------+--------------------+----------|
| VGA interface | J5 | Serial port 3 & 4 | J13 |
|-----------------+----------+--------------------+----------|
| External video | J6 | Floppy drive | J14 |
| overlay | | interface | |
|-----------------+----------+--------------------+----------|
| Ethernet | J7 | Parallel port | J15 |
| 10BaseT | | | |
| connector | | | |
|-----------------+----------+--------------------+----------|
| AUI connector | J8 | Utility/keyboard | J16 |
| | | connector | |
|-----------------+----------+--------------------+----------|
| SCSI-II | J9 | PC/104 connector | P18 |
| interface | | | |
|-----------------+----------+--------------------+----------|
| DC power | J10 | PC/104 connector | P20 |
|------------------------------------------------------------|
| Note: Alternate external LAN media are available by means |
| of AUI interface & optional MAUs. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| | Negative vee enabled | W1 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Negative vee disabled | W1 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W3 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W8 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W9 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W10 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W11 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W12 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W13 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W16 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| | Watch dog timer select IOCHK | W17 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Watch dog timer select RESET | W17 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W20 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W22 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| | Low shift clock enabled | W23 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | High shift clock enabled | W23 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W24 | Unidentified |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (1) 256K x 32 | None |
|------------------+--------------------+--------------------|
| 2MB | (1) 512K x 32 | None |
|------------------+--------------------+--------------------|
| 2MB | (1) 256K x 32 | (1) 256K x 32 |
|------------------+--------------------+--------------------|
| 4MB | (1) 1M x 32 | None |
|------------------+--------------------+--------------------|
| 4MB | (1) 512K x 32 | (1) 512K x 32 |
|------------------+--------------------+--------------------|
| 8MB | (1) 2M x 32 | None |
|------------------+--------------------+--------------------|
| 8MB | (1) 1M x 32 | (1) 1M x 32 |
|------------------+--------------------+--------------------|
| 12MB | (1) 2M x 32 | (1) 1M x 32 |
|------------------+--------------------+--------------------|
| 16MB | (1) 4M x 32 | None |
|------------------+--------------------+--------------------|
| 17MB | (1) 4M x 32 | (1) 256K x 32 |
|------------------+--------------------+--------------------|
| 18MB | (1) 4M x 32 | (1) 512K x 32 |
|------------------+--------------------+--------------------|
| 20MB | (1) 4M x 32 | (1) 1M x 32 |
|------------------+--------------------+--------------------|
| 24MB | (1) 4M x 32 | (1) 2M x 32 |
|------------------+--------------------+--------------------|
| 32MB | (1) 8M x 32 | None |
|------------------+--------------------+--------------------|
| 32MB | (1) 8M x 32 | (1) 4M x 32 |
|------------------+--------------------+--------------------|
| 34MB | (1) 8M x 32 | (1) 512K x 32 |
|------------------+--------------------+--------------------|
| 36MB | (1) 8M x 32 | (1) 1M x 32 |
|------------------+--------------------+--------------------|
| 40MB | (1) 8M x 32 | (1) 2M x 32 |
|------------------+--------------------+--------------------|
| 48MB | (1) 8M x 32 | (1) 4M x 32 |
|------------------+--------------------+--------------------|
| 64MB | (1) 8M x 32 | (1) 8M x 32 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Note: The location of the 512KB/1MB video memory is |
| unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CHANNEL SELECTION |
|------------------------------------------------------------|
| Channel | W18 | W19 |
|------------------+--------------------+--------------------|
| 1 | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 3 | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 1 INTERRUPT SELECTION |
|------------------------------------------------------------|
| IRQ | W4 | W6 |
|---------------------------+--------------------+-----------|
| IRQ4 shared with serial 1 | Pins 1 & 2 closed | Open |
|---------------------------+--------------------+-----------|
| IRQ4 not shared | Pins 2 & 3 closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 2 INTERRUPT SELECTION |
|------------------------------------------------------------|
| IRQ | W5 | W7 |
|---------------------------+--------------------+-----------|
| IRQ3 shared with serial 2 | Pins 1 & 2 closed | Open |
|---------------------------+--------------------+-----------|
| IRQ3 not shared | Pins 2 & 3 closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS SELECTION IN S0 & S1 (EPROM) |
|------------------------------------------------------------|
| Type | W2 | W14 | W15 | W21 |
|--------+------+------------------+-----------------+-------|
| 27C64 | Open | 2 & 5, 7 & 8, 9 | 2 & 5, 7 & 8, 9 | 2 & 3 |
| | | & 12, 10 & 11 | & 12, 10 & 11 | |
|--------+------+------------------+-----------------+-------|
| 27C128 | Open | 2 & 5, 7 & 8, 9 | 2 & 5, 7 & 8, 9 | 2 & 3 |
| | | & 12, 10 & 11 | & 12, 10 & 11 | |
|--------+------+------------------+-----------------+-------|
| 27C256 | Open | 9 & 12, 14 & 15 | 9 & 12, 14 & 15 | 2 & 3 |
|--------+------+------------------+-----------------+-------|
| 27C512 | Open | 9 & 12, 10 & 11, | 9 & 12, 10 & | 2 & 3 |
| | | 14 & 15 | 11, 14 & 15 | |
|--------+------+------------------+-----------------+-------|
| 27C010 | Open | 9 & 12, 10 & 11 | 9 & 12, 10 & 11 | 2 & 3 |
|--------+------+------------------+-----------------+-------|
| 27C020 | Open | 2 & 5, 7 & 8, 9 | 2 & 5, 7 & 8, 9 | 2 & 3 |
| | | & 12, 10 & 11 | & 12, 10 & 11 | |
|--------+------+------------------+-----------------+-------|
| 27C040 | Open | 2 & 5, 4 & 7, 9 | 2 & 5, 4 & 7, 9 | 2 & 3 |
| | | & 12, 10 & 11, | & 12, 10 & 11, | |
| | | 13 & 14 | 13 & 14 | |
|--------+------+------------------+-----------------+-------|
| 27C080 | Open | 4 & 7, 5 & 6, 9 | 4 & 7, 5 & 6, 9 | 2 & 3 |
| | | & 12, 10 & 11, | & 12, 10 & 11, | |
| | | 13 & 14 | 13 & 14 | |
|--------+------+------------------+-----------------+-------|
| 28C64 | Open | 2 & 5, 7 & 8, 9 | 2 & 5, 7 & 8, 9 | 2 & 3 |
| | | & 12, 10 & 11 | & 12, 10 & 11 | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
| W14 controls S0 & W15 controls S1. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS SELECTION IN S0 & S1 (FLASH BIOS) |
|------------------------------------------------------------|
| Type | W2 | W14 | W15 | W21 |
|--------+------+------------------+-----------------+-------|
| 29C256 | Open | 8 & 11, 9 & 12, | 8 & 11, 9 & 12, | 2 & 3 |
| | | 14 & 15 | 14 & 15 | |
|--------+------+------------------+-----------------+-------|
| 28C256 | Open | 8 & 9, 11 & 12, | 8 & 9, 11 & 12, | 2 & 3 |
| | | 14 & 15 | 14 & 15 | |
|--------+------+------------------+-----------------+-------|
| 29F512 | Open | 4 & 5, 7 & 8, 9 | 4 & 5, 7 & 8, 9 | 2 & 3 |
| | | & 12, 10 & 11, | & 12, 10 & 11, | |
| | | 13 & 14 | 13 & 14 | |
|--------+------+------------------+-----------------+-------|
| 29F010 | Open | 4 & 5, 7 & 8, 9 | 4 & 5, 7 & 8, 9 | 2 & 3 |
| | | & 12, 10 & 11, | & 12, 10 & 11, | |
| | | 13 & 14 | 13 & 14 | |
|--------+------+------------------+-----------------+-------|
| 29F020 | Open | 4 & 5, 7 & 8, 9 | 4 & 5, 7 & 8, 9 | 2 & 3 |
| | | & 12, 10 & 11, | & 12, 10 & 11, | |
| | | 13 & 14 | 13 & 14 | |
|--------+------+------------------+-----------------+-------|
| 29F040 | Open | 4 & 5, 7 & 8, 9 | 4 & 5, 7 & 8, 9 | 2 & 3 |
| | | & 12, 10 & 11, | & 12, 10 & 11, | |
| | | 13 & 14 | 13 & 14 | |
|--------+------+------------------+-----------------+-------|
| 28F512 | Open | 2 & 5, 7 & 8, 9 | 2 & 5, 7 & 8, 9 | 2 & 3 |
| | | & 12, 10 & 11, | & 12, 10 & 11, | |
| | | 13 & 14 | 13 & 14 | |
|--------+------+------------------+-----------------+-------|
| 28F010 | Open | 2 & 5, 7 & 8, 9 | 2 & 5, 7 & 8, 9 | 2 & 3 |
| | | & 12, 10 & 11, | & 12, 10 & 11, | |
| | | 13 & 14 | 13 & 14 | |
|--------+------+------------------+-----------------+-------|
| 28F020 | Open | 2 & 5, 7 & 8, 9 | 2 & 5, 7 & 8, 9 | 2 & 3 |
| | | & 12, 10 & 11, | & 12, 10 & 11, | |
| | | 13 & 14 | 13 & 14 | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
| W14 controls S0 & W15 controls S1. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS SELECTION IN S0 & S1 (SRAM & NOVRAM) |
|------------------------------------------------------------|
| Type | W2 | W14 | W15 | W21 |
|---------+------+-----------------+-----------------+-------|
| BQ4013Y | Open | 7 & 10, 8 & 9, | 7 & 10, 8 & 9, | 2 & 3 |
| | | 11 & 12, 14 & | 11 & 12, 14 & | |
| | | 15 | 15 | |
|---------+------+-----------------+-----------------+-------|
| BQ4015Y | Open | 4 & 5, 7 & 10, | 4 & 5, 7 & 10, | 2 & 3 |
| | | 8 & 9, 11 & 12, | 8 & 9, 11 & 12, | |
| | | 13 & 14 | 13 & 14 | |
|---------+------+-----------------+-----------------+-------|
| 42356 | Open | 7 & 10, 8 & 9, | 7 & 10, 8 & 9, | 2 & 3 |
| | | 11 & 12, 14 & | 11 & 12, 14 & | |
| | | 15 | 15 | |
|---------+------+-----------------+-----------------+-------|
| DS1235Y | Open | 7 & 10, 8 & 9, | 7 & 10, 8 & 9, | 2 & 3 |
| | | 11 & 12, 14 & | 11 & 12, 14 & | |
| | | 15 | 15 | |
|---------+------+-----------------+-----------------+-------|
| DS1650Y | Open | 4 & 5, 7 & 10, | 4 & 5, 7 & 10, | 2 & 3 |
| | | 8 & 9, 11 & 12, | 8 & 9, 11 & 12, | |
| | | 13 & 14 | 13 & 14 | |
|---------+------+-----------------+-----------------+-------|
| 628128 | Open | 7 & 10, 8 & 9, | 7 & 10, 8 & 9, | 2 & 3 |
| | | 11 & 12, 14 & | 11 & 12, 14 & | |
| | | 15 | 15 | |
|---------+------+-----------------+-----------------+-------|
| 628512 | Open | 4 & 5, 7 & 10, | 4 & 5, 7 & 10, | 2 & 3 |
| | | 8 & 9, 11 & 12, | 8 & 9, 11 & 12, | |
| | | 13 & 14 | 13 & 14 | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
| W14 controls S0 & W15 controls S1. |
+------------------------------------------------------------+