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# BEK-TRONIC TECHNOLOGY, INC.
BEK-V429S
Processor 80486SX/SL80486SX/CX486DX/AM486DX/80486DX/SL80486DX/
CX486DX2/AM486DX2/SL80486DX2/80486DX2/CX486DX4/
CX486DX4/(SL)AM486DX4/SL80486DX4/P24D/P24T/CX5X86
Processor 25/33/40/50(internal)/66(internal)/75(internal)/80(internal)/
Speed 100(internal)/120(internal)MHz
Chip Set OPTI
Video Chip None
Set
Maximum 64MB
Onboard
Memory
Maximum None
Video
Memory
Cache 64/128/256/512KB
BIOS Award
Dimensions 254mm x 218mm
I/O 32-bit VESA local bus slots (3), green PC connector
Options
NPU None
Options
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| External battery | J2 | Speaker | JP38 |
|-------------------+----------+------------------+----------|
| Power LED & | J22 | Green PC | JP39 |
| keylock | | connector | |
| | | (monitor) | |
|-------------------+----------+------------------+----------|
| Green PC | JP6 | Green PC LED | JP41 |
| connector | | | |
|-------------------+----------+------------------+----------|
| Turbo LED | JP34 | Reset switch | S1 |
|-------------------+----------+------------------+----------|
| Turbo switch | JP36 | 32-bit VESA | SL1 – |
| | | local bus slots | SL3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| | Monitor type select color | JP1 | Closed |
|---+---------------------------------+-------+--------------|
| | Monitor type select monochrome | JP1 | Open |
|---+---------------------------------+-------+--------------|
| » | CMOS memory normal operation | JP2 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | JP2 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Battery type select external | JP2 | Open |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP7 | Closed |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP30 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP31 | Pins 2 & 3 |
| | alter | | closed |
|---+---------------------------------+-------+--------------|
| | LRDY wait state select 0 wait | JP33 | Pins 2 & 3 |
| | states | | closed |
|---+---------------------------------+-------+--------------|
| | LRDY wait state select 1 wait | JP33 | Pins 1 & 2 |
| | state | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION 1 |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (4) 256K x | None | None | None |
| | 9 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (4) 256K x | (1) 256K x | None | None |
| | 9 | 36 | | |
|------+-------------+-------------+------------+------------|
| 4MB | (4) 1M x 9 | None | None | None |
|------+-------------+-------------+------------+------------|
| 4MB | (4) 256K x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 9 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 5MB | (4) 256K x | (1) 1M x 36 | None | None |
| | 9 | | | |
|------+-------------+-------------+------------+------------|
| 6MB | (4) 256K x | (1) 256K x | (1) 1M x | None |
| | 9 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 8MB | (4) 1M x 9 | (1) 1M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 8MB | (4) 1M x 9 | None | (1) 1M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 10MB | (4) 256K x | (1) 256K x | (1) 1M x | (1) 1M x |
| | 9 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 12MB | (4) 1M x 9 | None | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (4) 4M x 9 | None | None | None |
|------+-------------+-------------+------------+------------|
| 16MB | (4) 1M x 9 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 17MB | (4) 256K x | (1) 4M x 36 | None | None |
| | 9 | | | |
|------+-------------+-------------+------------+------------|
| 20MB | (4) 1M x 9 | (1) 4M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 20MB | (4) 1M x 9 | None | (1) 4M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 32MB | (4) 4M x 9 | (1) 4M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 64MB | (4) 4M x 9 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION 2 |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+--------+---------------+-------------+-------------|
| 1MB | None | (1) 256K x 36 | None | None |
|-------+--------+---------------+-------------+-------------|
| 4MB | None | (1) 1M x 36 | None | None |
|-------+--------+---------------+-------------+-------------|
| 8MB | None | (1) 1M x 36 | (1) 1M x 36 | None |
|-------+--------+---------------+-------------+-------------|
| 12MB | None | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x 36 |
|-------+--------+---------------+-------------+-------------|
| 16MB | None | (1) 4M x 36 | None | None |
|-------+--------+---------------+-------------+-------------|
| 20MB | None | (1) 1M x 36 | (1) 4M x 36 | None |
|-------+--------+---------------+-------------+-------------|
| 32MB | None | (1) 4M x 36 | (1) 4M x 36 | None |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Configuration | JP5 |
|----------------------------+-------------------------------|
| 1 | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 2 | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+-------------+-----------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 |
|------------+---------------+-------------+-----------------|
| 128KB | (4) 32K x 8 | None | (1) 8K x 8 |
|------------+---------------+-------------+-----------------|
| 256KB (A) | (4) 32K x 8 | (4) 32K x 8 | (1) 16K/32K x 8 |
|------------+---------------+-------------+-----------------|
| 256KB (B) | (2) 64K x 32 | None | (1) 16K/32K x 8 |
|------------+---------------+-------------+-----------------|
| 512KB | (4) 128K x 8 | None | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP8 | JP27 | JP28 | JP43 |
|------------+-------------------+---------+--------+--------|
| 64KB | Pins 2 & 3 closed | Open | Open | Open |
|------------+-------------------+---------+--------+--------|
| 128KB | Pins 1 & 2 closed | Closed | Open | Open |
|------------+-------------------+---------+--------+--------|
| 256KB (A) | Pins 2 & 3 closed | Closed | Closed | Open |
|------------+-------------------+---------+--------+--------|
| 256KB (B) | Pins 1 & 2 closed | Closed | Closed | Open |
|------------+-------------------+---------+--------+--------|
| 512KB | Pins 1 & 2 closed | Closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE TAG CONFIGURATION |
|------------------------------------------------------------|
| Size | JP44 |
|----------------------------+-------------------------------|
| (1) 8K x 8 | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| (1) 16K x 8 | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| (1) 32K x 8 | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP9 | JP10 | JP11 | JP12 |
|-------------------+----------+----------+---------+--------|
| 80486SX-25 | Open | Closed | 1 & 2 | Open |
|-------------------+----------+----------+---------+--------|
| 80486SX-33 | Open | Closed | 1 & 2 | Open |
|-------------------+----------+----------+---------+--------|
| SL80486SX-25 | Open | Closed | 1 & 2 | 1 & 2 |
|-------------------+----------+----------+---------+--------|
| SL80486SX-33 | Open | Closed | 1 & 2 | 1 & 2 |
|-------------------+----------+----------+---------+--------|
| SL8046SX2-50 | Open | Closed | 1 & 2 | 1 & 2 |
|-------------------+----------+----------+---------+--------|
| CX486DX-33 | Closed | Open | 2 & 3 | 2 & 3 |
|-------------------+----------+----------+---------+--------|
| CX486DX-40 | Closed | Open | 2 & 3 | 2 & 3 |
|-------------------+----------+----------+---------+--------|
| AM486DX-33 | Open | Open | 1 & 2 | Open |
|-------------------+----------+----------+---------+--------|
| AM486DX-40 | Open | Open | 1 & 2 | Open |
|-------------------+----------+----------+---------+--------|
| 80486DX-33 | Open | Open | 1 & 2 | Open |
|-------------------+----------+----------+---------+--------|
| SL80486DX-33 | Open | Closed | 1 & 2 | 1 & 2 |
|-------------------+----------+----------+---------+--------|
| CX486DX2-50 | Closed | Open | 2 & 3 | 2 & 3 |
|-------------------+----------+----------+---------+--------|
| CX486DX2-66 | Closed | Open | 2 & 3 | 2 & 3 |
|-------------------+----------+----------+---------+--------|
| AM486DX2-66NV8T | Open | Open | 1 & 2 | Open |
|-------------------+----------+----------+---------+--------|
| AM486DX2-80NV8T | Open | Open | 1 & 2 | Open |
|-------------------+----------+----------+---------+--------|
| AM486DX2-66NV8T | Open | Open | 1 & 2 | Open |
|-------------------+----------+----------+---------+--------|
| SL80486DX2-50 | Open | Closed | 1 & 2 | 1 & 2 |
|-------------------+----------+----------+---------+--------|
| 80486DX2-66 | Open | Closed | 1 & 2 | Open |
|-------------------+----------+----------+---------+--------|
| SL80486DX2-66 | Open | Closed | 1 & 2 | 1 & 2 |
|-------------------+----------+----------+---------+--------|
| CX486DX2-80 | Closed | Open | 2 & 3 | 2 & 3 |
|-------------------+----------+----------+---------+--------|
| CX486DX4-100 | Closed | Open | 2 & 3 | 2 & 3 |
|-------------------+----------+----------+---------+--------|
| (SL)AM486DX4-100 | Open | Closed | 1 & 2 | 1 & 2 |
|-------------------+----------+----------+---------+--------|
| (SL)AM486DX4-120 | Open | Closed | 1 & 2 | 1 & 2 |
|-------------------+----------+----------+---------+--------|
| SL80486DX4-75 | Open | Closed | 1 & 2 | 1 & 2 |
|-------------------+----------+----------+---------+--------|
| SL80486DX4-100 | Open | Closed | 1 & 2 | 1 & 2 |
|-------------------+----------+----------+---------+--------|
| P24D | Open | Closed | 2 & 3 | 1 & 2 |
|-------------------+----------+----------+---------+--------|
| P24T | Open | Closed | 2 & 3 | 1 & 2 |
|-------------------+----------+----------+---------+--------|
| CX5X86-100 | Open | Closed | 2 & 3 | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION (CON’T) |
|------------------------------------------------------------|
| Type | JP13 | JP15 | JP17 | JP18 |
|-------------------+---------+----------+----------+--------|
| 80486SX-25 | Open | Open | Open | Open |
|-------------------+---------+----------+----------+--------|
| 80486SX-33 | Open | Open | Closed | Closed |
|-------------------+---------+----------+----------+--------|
| SL80486SX-25 | Open | Open | Open | Open |
|-------------------+---------+----------+----------+--------|
| SL80486SX-33 | Open | Open | Closed | Closed |
|-------------------+---------+----------+----------+--------|
| SL8046SX2-50 | Open | Open | Open | Open |
|-------------------+---------+----------+----------+--------|
| CX486DX-33 | 1 & 2 | Open | Closed | Closed |
|-------------------+---------+----------+----------+--------|
| CX486DX-40 | 1 & 2 | Open | Closed | Open |
|-------------------+---------+----------+----------+--------|
| AM486DX-33 | 1 & 2 | Open | Closed | Closed |
|-------------------+---------+----------+----------+--------|
| AM486DX-40 | 1 & 2 | Open | Closed | Open |
|-------------------+---------+----------+----------+--------|
| 80486DX-33 | 1 & 2 | Open | Closed | Closed |
|-------------------+---------+----------+----------+--------|
| SL80486DX-33 | 1 & 2 | Open | Closed | Closed |
|-------------------+---------+----------+----------+--------|
| CX486DX2-50 | 1 & 2 | Open | Open | Open |
|-------------------+---------+----------+----------+--------|
| CX486DX2-66 | 1 & 2 | Open | Closed | Closed |
|-------------------+---------+----------+----------+--------|
| AM486DX2-66NV8T | 1 & 2 | Open | Closed | Closed |
|-------------------+---------+----------+----------+--------|
| AM486DX2-80NV8T | 1 & 2 | Open | Closed | Open |
|-------------------+---------+----------+----------+--------|
| AM486DX2-66NV8T | 1 & 2 | Open | Closed | Closed |
|-------------------+---------+----------+----------+--------|
| SL80486DX2-50 | 1 & 2 | Open | Open | Open |
|-------------------+---------+----------+----------+--------|
| 80486DX2-66 | 1 & 2 | Open | Closed | Closed |
|-------------------+---------+----------+----------+--------|
| SL80486DX2-66 | 1 & 2 | Open | Closed | Closed |
|-------------------+---------+----------+----------+--------|
| CX486DX2-80 | 1 & 2 | Open | Closed | Open |
|-------------------+---------+----------+----------+--------|
| CX486DX4-100 | 1 & 2 | Open | Closed | Closed |
|-------------------+---------+----------+----------+--------|
| (SL)AM486DX4-100 | 1 & 2 | Open | Closed | Closed |
|-------------------+---------+----------+----------+--------|
| (SL)AM486DX4-120 | 1 & 2 | Open | Closed | Open |
|-------------------+---------+----------+----------+--------|
| SL80486DX4-75 | 1 & 2 | Open | Open | Open |
|-------------------+---------+----------+----------+--------|
| SL80486DX4-100 | 1 & 2 | Open | Closed | Closed |
|-------------------+---------+----------+----------+--------|
| P24D | 1 & 2 | Closed | Closed | Closed |
|-------------------+---------+----------+----------+--------|
| P24T | 1 & 2 | Open | Closed | Closed |
|-------------------+---------+----------+----------+--------|
| CX5X86-100 | 1 & 2 | Closed | Closed | Closed |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION (CON’T) |
|------------------------------------------------------------|
| Type | JP19 | JP20 | JP21 | JP22 |
|-------------------+---------+----------+----------+--------|
| 80486SX-25 | Open | Open | Open | Open |
|-------------------+---------+----------+----------+--------|
| 80486SX-33 | Open | Open | Open | Open |
|-------------------+---------+----------+----------+--------|
| SL80486SX-25 | Open | Closed | Closed | Open |
|-------------------+---------+----------+----------+--------|
| SL80486SX-33 | Open | Closed | Closed | Open |
|-------------------+---------+----------+----------+--------|
| SL8046SX2-50 | Open | Closed | Closed | Open |
|-------------------+---------+----------+----------+--------|
| CX486DX-33 | Open | Open | Open | Open |
|-------------------+---------+----------+----------+--------|
| CX486DX-40 | Open | Open | Open | Open |
|-------------------+---------+----------+----------+--------|
| AM486DX-33 | Open | Open | Open | Open |
|-------------------+---------+----------+----------+--------|
| AM486DX-40 | Open | Open | Open | Open |
|-------------------+---------+----------+----------+--------|
| 80486DX-33 | Open | Open | Open | Open |
|-------------------+---------+----------+----------+--------|
| SL80486DX-33 | Open | Closed | Closed | Open |
|-------------------+---------+----------+----------+--------|
| CX486DX2-50 | Open | Open | Open | Closed |
|-------------------+---------+----------+----------+--------|
| CX486DX2-66 | Open | Open | Open | Closed |
|-------------------+---------+----------+----------+--------|
| AM486DX2-66NV8T | 2 & 3 | Open | Open | Open |
|-------------------+---------+----------+----------+--------|
| AM486DX2-80NV8T | 2 & 3 | Open | Open | Open |
|-------------------+---------+----------+----------+--------|
| AM486DX2-66NV8T | Open | Open | Open | Open |
|-------------------+---------+----------+----------+--------|
| SL80486DX2-50 | Open | Closed | Closed | Open |
|-------------------+---------+----------+----------+--------|
| 80486DX2-66 | Open | Open | Open | Open |
|-------------------+---------+----------+----------+--------|
| SL80486DX2-66 | Open | Closed | Closed | Open |
|-------------------+---------+----------+----------+--------|
| CX486DX2-80 | Open | Open | Open | Closed |
|-------------------+---------+----------+----------+--------|
| CX486DX4-100 | Open | Open | Open | Closed |
|-------------------+---------+----------+----------+--------|
| (SL)AM486DX4-100 | Open | Closed | Closed | Open |
|-------------------+---------+----------+----------+--------|
| (SL)AM486DX4-120 | Open | Closed | Closed | Open |
|-------------------+---------+----------+----------+--------|
| SL80486DX4-75 | Open | Closed | Closed | Open |
|-------------------+---------+----------+----------+--------|
| SL80486DX4-100 | Open | Closed | Closed | Open |
|-------------------+---------+----------+----------+--------|
| P24D | 1 & 2 | Closed | Closed | Open |
|-------------------+---------+----------+----------+--------|
| P24T | Open | Closed | Closed | Open |
|-------------------+---------+----------+----------+--------|
| CX5X86-100 | 1 & 2 | Closed | Closed | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION (CON’T) |
|------------------------------------------------------------|
| Type | JP23 | JP29 | JP32 |
|-------------------+---------------+---------------+--------|
| 80486SX-25 | 2 & 3 | 1 & 3, 2 & 4 | Open |
|-------------------+---------------+---------------+--------|
| 80486SX-33 | 2 & 3 | 1 & 3, 2 & 4 | Open |
|-------------------+---------------+---------------+--------|
| SL80486SX-25 | 2 & 3 | 1 & 3, 2 & 4 | Open |
|-------------------+---------------+---------------+--------|
| SL80486SX-33 | 2 & 3 | 1 & 3, 2 & 4 | Open |
|-------------------+---------------+---------------+--------|
| SL8046SX2-50 | 2 & 3 | 1 & 3, 2 & 4 | Open |
|-------------------+---------------+---------------+--------|
| CX486DX-33 | 1 & 2, 3 & 4 | 1 & 3, 2 & 4 | Open |
|-------------------+---------------+---------------+--------|
| CX486DX-40 | 1 & 2, 3 & 4 | 1 & 3, 2 & 4 | Open |
|-------------------+---------------+---------------+--------|
| AM486DX-33 | 1 & 2, 3 & 4 | 1 & 3, 2 & 4 | Open |
|-------------------+---------------+---------------+--------|
| AM486DX-40 | 1 & 2, 3 & 4 | 1 & 3, 2 & 4 | Open |
|-------------------+---------------+---------------+--------|
| 80486DX-33 | 1 & 2, 3 & 4 | 1 & 3, 2 & 4 | Open |
|-------------------+---------------+---------------+--------|
| SL80486DX-33 | 1 & 2, 3 & 4 | 1 & 3, 2 & 4 | Open |
|-------------------+---------------+---------------+--------|
| CX486DX2-50 | 1 & 2, 3 & 4 | 1 & 3, 2 & 4 | Open |
|-------------------+---------------+---------------+--------|
| CX486DX2-66 | 1 & 2, 3 & 4 | 1 & 3, 2 & 4 | Open |
|-------------------+---------------+---------------+--------|
| AM486DX2-66NV8T | 1 & 2, 3 & 4 | 1 & 3, 2 & 4 | Open |
|-------------------+---------------+---------------+--------|
| AM486DX2-80NV8T | 1 & 2, 3 & 4 | 1 & 3, 2 & 4 | Open |
|-------------------+---------------+---------------+--------|
| AM486DX2-66NV8T | 1 & 2, 3 & 4 | 1 & 3, 2 & 4 | Open |
|-------------------+---------------+---------------+--------|
| SL80486DX2-50 | 1 & 2, 3 & 4 | 1 & 3, 2 & 4 | Open |
|-------------------+---------------+---------------+--------|
| 80486DX2-66 | 1 & 2, 3 & 4 | 1 & 3, 2 & 4 | Open |
|-------------------+---------------+---------------+--------|
| SL80486DX2-66 | 1 & 2, 3 & 4 | 1 & 3, 2 & 4 | Open |
|-------------------+---------------+---------------+--------|
| CX486DX2-80 | 1 & 2, 3 & 4 | 1 & 3, 2 & 4 | Open |
|-------------------+---------------+---------------+--------|
| CX486DX4-100 | 1 & 2, 3 & 4 | 1 & 3, 2 & 4 | Open |
|-------------------+---------------+---------------+--------|
| (SL)AM486DX4-100 | 1 & 2, 3 & 4 | 3 & 5, 4 & 6 | Open |
|-------------------+---------------+---------------+--------|
| (SL)AM486DX4-120 | 1 & 2, 3 & 4 | 3 & 5, 4 & 6 | Open |
|-------------------+---------------+---------------+--------|
| SL80486DX4-75 | 1 & 2, 3 & 4 | 3 & 5, 4 & 6 | Open |
|-------------------+---------------+---------------+--------|
| SL80486DX4-100 | 1 & 2, 3 & 4 | 3 & 5, 4 & 6 | Open |
|-------------------+---------------+---------------+--------|
| P24D | Open | 1 & 3, 2 & 4 | Open |
|-------------------+---------------+---------------+--------|
| P24T | 1 & 2, 3 & 4 | 1 & 3, 2 & 4 | 2 & 3 |
|-------------------+---------------+---------------+--------|
| CX5X86-100 | 1 & 2, 3 & 4 | 3 & 5, 4 & 6 | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL BUS WAIT STATE SELECTION |
|------------------------------------------------------------|
| Setting | JP35 |
|-------------------------------+----------------------------|
| 0 | Open |
|-------------------------------+----------------------------|
| 1 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL BUS SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP37 |
|-------------------------------+----------------------------|
| <= 33MHz | Open |
|-------------------------------+----------------------------|
| >33 MHz | Closed |
+------------------------------------------------------------+