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# J-BOND COMPUTER SYSTEMS CORPORATION
PCI 486
Processor 80486SX/80487SX/80486DX/80486DX2/Pentium
Overdrive
Processor 25/33/50(internal)/66(internal)MHz
Speed
Chip Set Intel
Max. Onboard 128MB
DRAM
Cache 64/128/256/512KB
BIOS Phoenix
Dimensions 330mm x 218mm
I/O Options 32-bit PCI bus slots (3), SCSI interface
NPU Options None
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| Speaker | J1 | IDE interface LED | J9 |
|------------------+----------+-------------------+----------|
| Reset switch | J2 | SCSI interface | CN1 |
|------------------+----------+-------------------+----------|
| Power LED & | J3 | 32-bit PCI bus | P1, P2, |
| keylock | | slots | P3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | CMOS memory normal operation | J8 | Open |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | J8 | Closed |
|---+----------------------------------+--------+------------|
| » | External cache wait state select | J14 | pins 2 & 3 |
| | 0 wait state | | closed |
|---+----------------------------------+--------+------------|
| | External cache wait state select | J14 | pins 1 & 2 |
| | 1 wait state | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J15 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J16 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J17 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J20 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J21 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | SCSI terminator term power | J24 | Closed |
| | select internal | | |
|---+----------------------------------+--------+------------|
| | SCSI terminator term power | J24 | Open |
| | select external peripheral | | |
|---+----------------------------------+--------+------------|
| » | SCSI IRQ select IRQ11 | J114 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | SCSI IRQ select IRQ9 | J114 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | External cache enabled | JP17 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | External cache disabled | JP17 | pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 2MB | (2) 256K x 36 | NONE |
|------------------+--------------------+--------------------|
| 4MB | (2) 256K x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 4MB | (2) 512K x 36 | NONE |
|------------------+--------------------+--------------------|
| 6MB | (2) 256K x 36 | (2) 512K x 36 |
|------------------+--------------------+--------------------|
| 6MB | (2) 512K x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 8MB | (2) 512K x 36 | (2) 512K x 36 |
|------------------+--------------------+--------------------|
| 8MB | (2) 1M x 36 | NONE |
|------------------+--------------------+--------------------|
| 10MB | (2) 256K x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 10MB | (2) 1M x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 12MB | (2) 512K x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 12MB | (2) 1M x 36 | (2) 512K x 36 |
|------------------+--------------------+--------------------|
| 16MB | (2) 1M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 16MB | (2) 2M x 36 | NONE |
|------------------+--------------------+--------------------|
| 18MB | (2) 256K x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 18MB | (2) 2M x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 20MB | (2) 512K x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 20MB | (2) 2M x 36 | (2) 512K x 36 |
|------------------+--------------------+--------------------|
| 24MB | (2) 1M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 24MB | (2) 2M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (2) 4M x 36 | NONE |
|------------------+--------------------+--------------------|
| 34MB | (2) 256K x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 34MB | (2) 4M x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 36MB | (2) 512K x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 36MB | (2) 4M x 36 | (2) 512K x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON'T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 40MB | (2) 1M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 40MB | (2) 4M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (2) 2M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (2) 4M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 64MB | (2) 4M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 64MB | (2) 8M x 36 | NONE |
|------------------+--------------------+--------------------|
| 66MB | (2) 256K x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 66MB | (2) 8M x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 68MB | (2) 512K x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 68MB | (2) 8M x 36 | (2) 512K x 36 |
|------------------+--------------------+--------------------|
| 72MB | (2) 1M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 72MB | (2) 8M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 80MB | (2) 2M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 80MB | (2) 8M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 96MB | (2) 4M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 96MB | (2) 8M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 128MB | (2) 8M x 36 | (2) 8M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|-------+--------------+-------------+-----------------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 32K x 8; (1) 16K |
| | | | x 8; (1) 8K x 8 |
|-------+--------------+-------------+-----------------------|
| 128KB | (4) 32K x 8 | NONE | (1) 32K x 8; (1) 16K |
| | | | x 8; (1) 8K x 8 |
|-------+--------------+-------------+-----------------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8; (1) 16K |
| | | | x 8 |
|-------+--------------+-------------+-----------------------|
| 512KB | (4) 128K x 8 | NONE | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J5 | J6 | J7 | J11 | J18 | J19 |
|--------+--------+--------+--------+--------+-------+-------|
| 64KB | Open | Open | Open | 2 & 3 | 1 & 2 | 1 & 2 |
|--------+--------+--------+--------+--------+-------+-------|
| 128KB | Open | Closed | Open | 1 & 2 | 2 & 3 | 1 & 2 |
|--------+--------+--------+--------+--------+-------+-------|
| 256KB | Open | Closed | Closed | 1 & 2 | 1 & 2 | 2 & 3 |
|--------+--------+--------+--------+--------+-------+-------|
| 512KB | Closed | Closed | Closed | 1 & 2 | 2 & 3 | 2 & 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | KC1 | KC2 | KC3 | KC4 | KC5 |
|-------------+---------+---------+--------+--------+--------|
| 80486SX | Open | Open | Open | Closed | Open |
|-------------+---------+---------+--------+--------+--------|
| 80487SX | Open | Closed | Closed | Open | Closed |
|-------------+---------+---------+--------+--------+--------|
| 80486DX/DX2 | Closed | Open | Closed | Open | Closed |
|-------------+---------+---------+--------+--------+--------|
| Overdrive | Open | Closed | Closed | Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | J13 | J103 |
|--------------------+--------------------+------------------|
| 25MHz | pins 1 & 2 closed | Open |
|--------------------+--------------------+------------------|
| 33MHz | pins 2 & 3 closed | Closed |
|--------------------+--------------------+------------------|
| 50iMHz | pins 1 & 2 closed | Open |
|--------------------+--------------------+------------------|
| 66iMHz | pins 2 & 3 closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PCI MASTER CONFIGURATION |
|------------------------------------------------------------|
| | Master | J104 | J105 |
|---+----------------+-------------------+-------------------|
| » | PCI 3 | pins 2 & 3 closed | pins 2 & 3 closed |
|---+----------------+-------------------+-------------------|
| | PCI 1 | pins 1 & 2 closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PCI MASTER CONFIGURATION |
|------------------------------------------------------------|
| | Master | J106 | J107 |
|---+----------------+-------------------+-------------------|
| » | SCSI | pins 2 & 3 closed | pins 2 & 3 closed |
|---+----------------+-------------------+-------------------|
| | PCI 2 | pins 1 & 2 closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PCI IRQ CONFIGURATION |
|------------------------------------------------------------|
| IRQ |J36C/B/A|J39C/B/A|J40C/B/A|J42C/B/A|J43C/B/A|J113C/B/A|
|-----+--------+--------+--------+--------+--------+---------|
|IRQ3 | Closed | Open | Open | Open | Open | Open |
|-----+--------+--------+--------+--------+--------+---------|
|IRQ5 | Open | Closed | Open | Open | Open | Open |
|-----+--------+--------+--------+--------+--------+---------|
|IRQ10| Open | Open | Closed | Open | Open | Open |
|-----+--------+--------+--------+--------+--------+---------|
|IRQ11| Open | Open | Open | Closed | Open | Open |
|-----+--------+--------+--------+--------+--------+---------|
|IRQ14| Open | Open | Open | Open | Closed | Open |
|-----+--------+--------+--------+--------+--------+---------|
|IRQ15| Open | Open | Open | Open | Open | Closed |
+------------------------------------------------------------+