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# CMS ENHANCEMENTS, INC.
ST412 CONTROLLER CARD (MFM)
+------------------------------------------------------------+
|------------------------------------------------------------|
| Data bus: | 16-bit ISA |
|-------------------+----------------------------------------|
| Size: | Three quarter-length, full-height card |
|-------------------+----------------------------------------|
| Hard drive | Two ST506/412 MFM drives |
| supported: | |
|-------------------+----------------------------------------|
| Floppy drives | None |
| supported: | |
+------------------------------------------------------------+
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location | Function | Location |
|-------------------+----------+------------------+----------|
| 20-pin data cable | J3 | 34-pin control | J5 |
| connector - drive | | cable connector | |
| 1 | | | |
|-------------------+----------+------------------+----------|
| 20-pin data cable | J4 | External LED | J6 |
| connector - drive | | connector | |
| 0 | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|---------------------------------------+----------+---------|
| » | Drive in latched mode | W1/A | open |
|---+-----------------------------------+----------+---------|
| | Drive in non-latched mode | W1/A | closed |
|---+-----------------------------------+----------+---------|
| » | Factory configured - do not alter | W1/B | open |
|---+-----------------------------------+----------+---------|
| » | Caching enabled | W1/C | open |
|---+-----------------------------------+----------+---------|
| | Caching disabled | W1/C | closed |
|---+-----------------------------------+----------+---------|
| » | Factory configured - do not alter | W1/D | open |
|---+-----------------------------------+----------+---------|
| » | Primary port I/O address select | W3 | open |
| | C800h, D000h, or D800h | | |
|---+-----------------------------------+----------+---------|
| | Alternate port I/O address select | W3 | closed |
| | CC00h, D400h | | |
|---+-----------------------------------+----------+---------|
| » | Factory configured - do not alter | W4 | N/A |
|---+-----------------------------------+----------+---------|
| » | Factory configured - do not alter | W5 | N/A |
+------------------------------------------------------------+