AMPRO COMPUTERS, INC.
LITTLE BOARD/PC
|
Processor |
8088 |
|
Processor Speed |
7MHz |
|
Chip Set |
Unidentified |
|
Video Chip Set |
None |
|
Maximum Onboard Memory |
640KB |
|
Maximum Video Memory |
None |
|
Cache |
None |
|
BIOS |
Ampro |
|
Dimensions |
203mm x 146mm |
|
I/O Options |
Floppy drive interface, SCSI connector, parallel port, serial ports (2), PC bus interface |
|
NPU Options |
NEC uPD72191 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Serial port (V40) |
J2 |
Keyboard connector |
J5 |
|
Serial port |
J3 |
Parallel port |
J6 |
|
Speaker |
J4 pins 1 & 2 |
SCSI interface |
J7 |
|
Reset switch |
J4 pins 3 & 4 |
Floppy drive interface |
J8 |
|
Power LED |
J4 pins 5 & 6 |
PC bus interface |
J9 |
|
Auxiliary power for PC bus connector |
J4 pins 7 - 10 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
|
DMA END (TC) signal disabled |
W1 |
Open |
|
DMA END (TC) signal enabled |
W1 |
Closed | |
|
|
5v termination power to pin 26 of SCSI disabled |
W4 |
Open |
|
5v termination power to pin 26 of SCSI enabled |
W4 |
Closed | |
|
|
PC bus IRQ5 disabled |
W6 |
Open |
|
PC bus IRQ5 enabled |
W6 |
Closed | |
|
|
Factory configured - do not alter |
W9 |
Open |
|
|
Floppy drive IRQ6 enabled |
W10 |
Closed |
|
Floppy drive IRQ6 disabled |
W10 |
Open | |
|
|
Parallel port LPT select LPT1 |
W11 |
Open |
|
Parallel port LPT select LPT2 |
W11 |
Closed | |
|
|
Factory configured - do not alter |
W21 |
Unidentified |
|
|
Factory configured - do not alter |
W22 |
Unidentified |
|
|
Factory configured - do not alter |
W26 |
Unidentified |
|
|
Factory configured - do not alter |
W27 |
Unidentified |
|
|
Factory configured - do not alter |
W28 |
Unidentified |
|
|
NPU not installed |
W30 |
Open |
|
NPU installed |
W30 |
Closed | |
|
|
Monitor type select CGA |
W31 |
Closed |
|
Monitor type select monochrome |
W31 |
Open | |
|
|
Factory configured - do not alter |
W34 |
Unidentified |
|
|
Write precomp speed select 125ns |
W39 |
Open |
|
Write precomp speed select 187ns |
W39 |
Closed | |
|
|
Drive speed select single speed |
W40 |
Open |
|
Drive speed select dual speed |
W40 |
Closed | |
|
DRAM CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
|
256KB |
SIMM installed |
None |
None |
|
512KB |
SIMM installed |
SIMM installed |
None |
|
640KB |
SIMM installed |
SIMM installed |
SIMM installed |
|
Note: The size of the DRAM chips are unidentified. | |||
|
DRAM JUMPER CONFIGURATION | ||
|
Size |
W19 |
W20 |
|
256KB |
Closed |
Closed |
|
512KB |
Open |
Closed |
|
640KB |
Closed |
Open |
|
PROM SOCKET SELECTION (U26) | ||||||
|
Type |
Address |
W35 |
W36 |
W37 |
W38 | |
|
Empty |
N/A |
Open |
Open |
Open |
N/A | |
|
2764 |
E0000h |
Open |
Open |
Closed |
Open | |
|
2764 |
E4000h |
Closed |
Closed |
Open |
Open | |
|
2764 |
E8000h |
Open |
Closed |
Open |
Open | |
|
2764 |
EC000h |
Closed |
Open |
Open |
Open | |
|
27256 |
E0000h |
Open |
Closed |
Closed |
Closed | |
|
27256 |
E8000h |
Closed |
Open |
Closed |
Closed | |
|
27512 |
E0000h |
Closed |
Closed |
Closed |
Closed | |
|
MEMORY OPTION SELECTION | ||||||||
|
Type |
W8 |
W12 |
W13 |
W14 |
W15 |
W16 |
W41 | |
|
None |
Open |
Open |
Open |
Open |
Open |
Open |
Open | |
|
2764 |
Closed |
Closed |
Open |
Open |
Open |
Open |
2 & 3 | |
|
27256 |
Open |
Closed |
Open |
Closed |
Closed |
Open |
2 & 3 | |
|
6264 |
Closed |
Closed |
Open |
Open |
Open |
Closed |
Open | |
|
62256 |
Open |
Closed |
Open |
Closed |
Open |
Closed |
1 & 2 | |
|
Note: Pins designated should be in the closed position. | ||||||||
|
FLOPPY DMA CHANNEL SELECTION | |||
|
Channel |
W5 |
W7 | |
|
1 |
Pins 1 & 2 closed |
Pins 1 & 2 closed | |
|
2 |
Pins 2 & 3 closed |
Pins 2 & 3 closed | |
|
SCSI DMA CHANNEL SELECTION | |||
|
Channel |
W2 |
W3 | |
|
1 |
Pins 2 & 3 closed |
Pins 2 & 3 closed | |
|
3 |
Pins 1 & 2 closed |
Pins 1 & 2 closed | |
|
SERIAL PORT ADDRESS SELECTION | ||||||
|
Setting |
Address |
IRQ |
W17 |
W18 |
W29 | |
|
COM1 (3F8h) |
3F8h - 3FF |
IRQ4 |
Closed |
Open |
Open | |
|
COM2 (2F8h) |
2F8h - 2FF |
IRQ3 |
Open |
Closed |
Closed | |
|
FLOPPY DRIVE SELECTION | ||
|
Drives installed |
W32 |
W33 |
|
1 |
Closed |
Closed |
|
2 |
Closed |
Open |
|
3 (not supported) |
Open |
Closed |
|
4 (not supported) |
Open |
Open |
|
SCSI BUS ID SELECTION | ||||
|
ID |
W23 |
W24 |
W25 | |
|
0 |
Closed |
Closed |
Closed | |
|
1 |
Open |
Closed |
Closed | |
|
2 |
Closed |
Open |
Closed | |
|
3 |
Open |
Open |
Closed | |
|
4 |
Closed |
Closed |
Open | |
|
5 |
Open |
Closed |
Open | |
|
6 |
Closed |
Open |
Open | |
|
7 |
Open |
Open |
Open | |