(TXT) View Source
# DISTRIBUTED PROCESSING TECHNOLOGY
PM2021A/90, PM2021A/95
+------------------------------------------------------------+
+------------------------------------------------------------+
Data bus: 16-bit, ISA (PM2021A/9x)
Size: Half-length, full-height card
Hard drive Up to seven SCSI drives
supported:
Floppy drives Two 360KB, 720KB, 1.2MB, or 1.44MB drives
supported: (PM2x2x/95 only)
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location |
|----------------------------------------------+-------------|
| CM4000 Cache Module Connector | P1 |
|----------------------------------------------+-------------|
| CM4000 Cache Module Connector | P2 |
|----------------------------------------------+-------------|
| DM4000 Disk Array Module Connector | P5 |
|----------------------------------------------+-------------|
| 4-pin connector-Drive active LED | P6 |
|----------------------------------------------+-------------|
| DM400 Disk Array Module Connector | P7 |
|----------------------------------------------+-------------|
| 34-pin control cable connector-floppy drive | P8 |
|----------------------------------------------+-------------|
| 50-pin SCSI connector - internal | P10 |
|----------------------------------------------+-------------|
| 50-pin SCSI connector - external | J11 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA TRANSFER RATE |
|------------------------------------------------------------|
| Speed | Jumper Y12 | Jumper Y13 | Jumper Y14 |
|------------------+-------------+-------------+-------------|
| | 10MB/sec | open | open | open |
|---+--------------+-------------+-------------+-------------|
| | 8MB/sec | closed | open | open |
|---+--------------+-------------+-------------+-------------|
| | 6.667MB/sec | open | closed | open |
|---+--------------+-------------+-------------+-------------|
| | 5.7MB/sec | closed | closed | open |
|---+--------------+-------------+-------------+-------------|
| » | 5.0MB/sec | open | open | closed |
|---+--------------+-------------+-------------+-------------|
| | 4.4MB/sec | closed | open | closed |
|---+--------------+-------------+-------------+-------------|
| | 4.0MB/sec | open | closed | closed |
|---+--------------+-------------+-------------+-------------|
| | 3.0MB/sec | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SCSI ADDRESS |
|------------------------------------------------------------|
| SCSI I.D. | Jumper Y18 | Jumper Y25 | Jumper Y26 |
|--------------+---------------+--------------+--------------|
| | 0 | open | open | open |
|-----+--------+---------------+--------------+--------------|
| | 1 | open | closed | open |
|-----+--------+---------------+--------------+--------------|
| | 2 | closed | open | open |
|-----+--------+---------------+--------------+--------------|
| | 3 | closed | closed | open |
|-----+--------+---------------+--------------+--------------|
| | 4 | open | open | closed |
|-----+--------+---------------+--------------+--------------|
| | 5 | open | closed | closed |
|-----+--------+---------------+--------------+--------------|
| | 6 | closed | open | closed |
|-----+--------+---------------+--------------+--------------|
| » | 7 | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT REQUEST |
|------------------------------------------------------------|
| IRQ | Y29 | Y30 |
|------------------------+-----------------+-----------------|
| | Disabled | open | open |
|---+--------------------+-----------------+-----------------|
| | IRQ12 | open | closed |
|---+--------------------+-----------------+-----------------|
| » | IRQ15 | closed | open |
|---+--------------------+-----------------+-----------------|
| | IRQ14 | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CHANNEL |
|------------------------------------------------------------|
| DRQ | Y31 | Y32 |
|---------------------+-------------------+------------------|
| | DRQ0 | open | open |
|---+-----------------+-------------------+------------------|
| | DRQ7 | open | closed |
|---+-----------------+-------------------+------------------|
| | DRQ6 | closed | open |
|---+-----------------+-------------------+------------------|
| » | DRQ5 | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| I/O PORT ADDRESS |
|------------------------------------------------------------|
| Address | Y33 | Y35 |
|---------------------+-------------------+------------------|
| | 230h | open | open |
|---+-----------------+-------------------+------------------|
| » | 170h | open | closed |
|---+-----------------+-------------------+------------------|
| | 330h | closed | open |
|---+-----------------+-------------------+------------------|
| | 1F0h | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS ADDRESS |
|------------------------------------------------------------|
| Address | Y36 | Y37 |
|------------------------+-----------------+-----------------|
| | Disabled | open | open |
|---+--------------------+-----------------+-----------------|
| | DC00h | open | closed |
|---+--------------------+-----------------+-----------------|
| | D800h | closed | open |
|---+--------------------+-----------------+-----------------|
| » | C800h | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|---------------------------------------+----------+---------|
| » | DMA duty cycle is fast | Y15 | open |
|---+-----------------------------------+----------+---------|
| | DMA duty cycle is slow | Y15 | closed |
|---+-----------------------------------+----------+---------|
| » | SCSI termination enabled | Y16 | closed |
|---+-----------------------------------+----------+---------|
| | SCSI termination disabled | Y16 | open |
|---+-----------------------------------+----------+---------|
| » | Address LInes SA17-19 and LA17-19 | Y19 | closed |
| | driven | | |
|---+-----------------------------------+----------+---------|
| | Only Address LInes LA17-19 driven | Y19 | open |
|---+-----------------------------------+----------+---------|
| » | Floppy drive enabled | Y20 | closed |
|---+-----------------------------------+----------+---------|
| | Floppy drive disabled | Y20 | open |
|---+-----------------------------------+----------+---------|
| » | Bus Mastering enabled | Y24 | closed |
|---+-----------------------------------+----------+---------|
| | Bus Mastering disabled | Y24 | open |
|---+-----------------------------------+----------+---------|
| » | BIOS ROM size is 8K | Y38 | open |
|---+-----------------------------------+----------+---------|
| | BIOS ROM size is 16K | Y38 | closed |
|---+-----------------------------------+----------+---------|
| » | External SCSI cable detection | Y39 | open |
| | disabled | | |
|---+-----------------------------------+----------+---------|
| | External SCSI cable detection | Y39 | closed |
| | enabled* | | |
|---+-----------------------------------+----------+---------|
| » | Controller supplies TERMPWR to | Y50 | closed |
| | SCSI interface 26 | | |
|---+-----------------------------------+----------+---------|
| | TERMPWR not supplied to SCSI | Y50 | open |
| | Interface 26 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| STATUS LED'S |
|------------------------------------------------------------|
| LED | Definition |
|----------------+-------------------------------------------|
| LED 1 | Busy |
|----------------+-------------------------------------------|
| LED 2 | Computer Bus Transfer to Adapter |
|----------------+-------------------------------------------|
| LED 3 | Computer Bus Transfer from Adapter |
|----------------+-------------------------------------------|
| LED 4 | Cache Hit |
|----------------+-------------------------------------------|
| LED 5 | Disk Read-Ahead Active |
|----------------+-------------------------------------------|
| LED 6 | Disk Read |
|----------------+-------------------------------------------|
| LED 7 | Disk Write |
|----------------+-------------------------------------------|
| LED 8 | Adapter Reset |
|----------------+-------------------------------------------|
| LED 9 | Interrupt Pending to Computer |
|----------------+-------------------------------------------|
| LED 10 | DRQ Asserted to Computer |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTES |
|------------------------------------------------------------|
| Detection of an external SCSI cable limits the maximum |
| SCSI bus transfer rate to 5MB/sec. |
| |
| The function of Jumper Y34 is unknown. |
+------------------------------------------------------------+