INVISIBLE SOFTWARE, INC.
INVISIBLE EMS
Card Type |
Memory card |
Maximum Onboard Memory |
8192KB DRAM |
Data Bus |
16-bit ISA |
Card Size |
Three-quarter length, full-height card |
USER CONFIGURABLE SETTINGS | ||
Function |
Label |
Position |
Parity enable |
W1 |
Closed |
Parity disable |
W1 |
Open |
High memory enable |
SW1/1 |
Off |
High memory disable |
SW1/1 |
On |
BUS TYPE SELECTION | ||||||||||
BUS |
W2 |
W3 |
W4 |
W5 |
W6 |
W7 |
W8 |
W9 |
W10 |
W11 |
XT |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
AT |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
Note: Pins designated are in the closed position. |
BIT MODE SELECTION | ||||||
Mode |
W15 |
W16 |
W17 |
W18 |
W19 |
W20 |
8-bit |
Closed |
Closed |
Open |
Open |
Open |
Open |
8/16-bit |
Open |
Open |
Closed |
Closed |
Open |
Open |
16-bit |
Open |
Open |
Open |
Open |
Closed |
Closed |
DRAM JUMPER CONFIGURATION | ||
Size |
Bank 0 |
Bank 1 |
512KB |
(9) 256K x 1 |
(9) 256K x 1 |
2048KB |
(9) 1M x 1 |
(9) 1M x 1 |
8192KB |
(9) 4M x 1 |
(9) 4M x 1 |
Note: 16-pin memory chips should be mounted in the lower left corner of the socket. 18-pin memory chips should be mounted in the upper right corner of the socket. |
MEMORY CHIP TYPE SELECTION | ||
Type |
W21 |
W22 |
256K x 1 |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
1M x 1 |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
4M x 1 DRAM |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
ADAPTER SELECTION | ||
Setting |
W13 |
W14 |
Primary |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Secondary |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
I/O ADDRESS SELECTION | |||
Setting |
SW1/6 |
SW1/7 |
SW1/8 |
208h |
Closed |
Closed |
Closed |
218h |
Closed |
Closed |
Open |
248h |
Open |
Closed |
Closed |
258h |
Open |
Closed |
Open |
2A8h |
Closed |
Open |
Closed |
2B8h |
Closed |
Open |
Open |
2E8h |
Open |
Open |
Closed |
2F8h |
Open |
Open |
Open |
DOS BACKFILL SELECTION | ||||
Backfill |
SW1/2 |
SW1/3 |
SW1/4 |
SW1/5 |
None |
Closed |
Closed |
Closed |
Closed |
512K-640K |
Open |
Closed |
Closed |
Closed |
384K-640K |
Open |
Open |
Closed |
Closed |
256K-640K |
Open |
Open |
Closed |
Open |
128K-640K |
Open |
Open |
Open |
Closed |
0K-640K |
Open |
Open |
Open |
Open |
384K-512K |
Closed |
Open |
Closed |
Closed |
256K-512K |
Closed |
Open |
Closed |
Open |
128K-512K |
Closed |
Open |
Open |
Closed |
0K-512K |
Closed |
Open |
Open |
Open |
Note: This feature allows user with less than 640K of onboard memory to increase DOS memory to 640K. |