TEXT View Source
# GSI, INC.
MODEL 21 (1533-21-09-1)
Card Type Hard drive controller
Hard Drives Two EIDE drives
supported
Floppy drives Four 360KB, 720KB, 1.2MB, 1.44MB or 2.88MB
supported drives
Data Bus 16-bit ISA
Card Size Half-length, half-height
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|-----------------------+--------+-------------------+-------|
| 34-pin secondary | J2 | 40-pin EIDE | J6 |
| floppy connector | | connector | |
|-----------------------+--------+-------------------+-------|
| 34-pin primary floppy | J3 | Drive active LED | J8 |
| connector | | | |
|-----------------------+--------+-------------------+-------|
| Auxiliary power | J5 | | |
| connector | | | |
|------------------------------------------------------------|
| Note:J2 supports 2.88MB as well as standard floppy |
| drives. J3 supports only standard floppy drives. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|----------------------------------+----------+--------------|
| » | Factory configured - do | J4 | Pins 1 & 2 |
| | not alter | | open |
|-----+----------------------------+----------+--------------|
| » | Factory configured - do | J4 | Pins 2 & 3 |
| | not alter | | open |
|-----+----------------------------+----------+--------------|
| » | Primary mode enabled | J4 | Pins 5 & 6 |
| | | | closed |
|-----+----------------------------+----------+--------------|
| | Secondary mode enabled | J4 | Pins 4 & 5 |
| | | | closed |
|------------------------------------------------------------|
| Note:Primary mode selects IRQ 14, I/O address 1F0h & |
| 3F6h for hard drives, IRQ 6, DMA 2, I/O address 3F0h |
| for floppy drives |
| |
| Secondary mode selects IRQ 15, I/O address 170h & |
| 376h for hard drives, IRQ 6, DMA 2, I/O address 370h |
| for floppy drives. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS ADDRESS SELECTION |
|------------------------------------------------------------|
| Address | J4 |
|----------------------------+-------------------------------|
| C8000h | Pins 7 & 8, 10 & 11 closed |
|----------------------------+-------------------------------|
| CC000h | Pins 7 & 8, 11 & 12 closed |
|----------------------------+-------------------------------|
| D0000h | Pins 8 & 9, 10 & 11 closed |
|----------------------------+-------------------------------|
| E0000h | Pins 8 & 9, 11 & 12 closed |
+------------------------------------------------------------+