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# AT & T
AT & T GLOBALYST 510
AT & T GLOBALYST 515
Processor SL80486SX/SL80486SX2/SL80486DX2/SL80486DX4/P24T/
486Overdrive
Processor 25/33/50(internal)/66(internal)100(internal)MHz
Speed
Chip Set Unidentified
Video Chip Cirrus Logic
Set
Maximum 64MB
Onboard
Memory
Maximum Video 1MB
Memory
Cache 256KB
BIOS IBM
Dimensions 330mm x 218mm
I/O Options Floppy drive interface, IDE interface, parallel
port, PS/2 mouse port, serial ports (2), VGA
graphics pass through connector, VGA port, riser
slot, cache slot
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+----------+--------------------+----------|
| PS/2 mouse port | CN1 | Floppy drive | J10 |
| | | interface | |
|-----------------+----------+--------------------+----------|
| Serial port 1 | CN2 | VGA graphics | J14 |
| | | pass-through | |
| | | connector | |
|-----------------+----------+--------------------+----------|
| Serial port 2 | CN3 | Front panel LEDS | J15 |
|-----------------+----------+--------------------+----------|
| Parallel port | CN4 | Speaker | J16 |
|-----------------+----------+--------------------+----------|
| VGA port | CN5 | Riser slot | SL1 |
|-----------------+----------+--------------------+----------|
| IDE interface | J8 | Cache slot | SL2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-----------------------------------+---------+--------------|
| » | CMOS memory normal operation | J1 | Pins 2 & 3 |
| | | | closed |
|----+------------------------------+---------+--------------|
| | CMOS memory clear | J1 | Pins 1 & 2 |
| | | | closed |
|----+------------------------------+---------+--------------|
| | Jumper information | J3V | Unidentified |
| | unavailable | | |
|----+------------------------------+---------+--------------|
| | On board video enabled | SW1/1 | On |
|----+------------------------------+---------+--------------|
| | On board video disabled | SW1/1 | Off |
|----+------------------------------+---------+--------------|
| » | Monitor type select color | SW1/2 | On |
|----+------------------------------+---------+--------------|
| | Monitor type select | SW1/2 | Off |
| | monochrome | | |
|------------------------------------------------------------|
| Note: If a VGA processor is enabled, SW1/2 has no |
| function. If the VGA controller is disabled, and a CGA or |
| MDA controller is installed, set the switch to the above |
| setting. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 4MB | (1) 1M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | None |
|------------+---------------+---------------+---------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 16MB | (1) 4M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 20MB | (1) 1M x 36 | (1) 4M x 36 | None |
|------------+---------------+---------------+---------------|
| 20MB | (1) 4M x 36 | (1) 1M x 36 | None |
|------------+---------------+---------------+---------------|
| 24MB | (1) 1M x 36 | (1) 4M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 24MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 24MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | None |
|------------+---------------+---------------+---------------|
| 36MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 36MB | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 36MB | (1) 4M x 36 | (1) 1M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 40MB | (1) 1M x 36 | (1) 1M x 36 | (1) 8M x 36 |
|------------+---------------+---------------+---------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 52MB | (1) 1M x 36 | (1) 4M x 36 | (1) 8M x 36 |
|------------+---------------+---------------+---------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 8M x 36 |
|------------------------------------------------------------|
| Note: The location of banks 0, 1, & 2 are unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | SL2 |
|----------------------------+-------------------------------|
| None | Not installed |
|----------------------------+-------------------------------|
| 256KB | 256KB module installed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|--------------------+-------------------+-------------------|
| 512KB | 512KB | None |
|--------------------+-------------------+-------------------|
| 1MB | 512KB | 512KB |
|------------------------------------------------------------|
| Note: Bank 0 is factory installed and is not configurable. |
| The size of the upgrade ships are unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JK1 |
|----------------------------+-------------------------------|
| 25MHz | Pins 1 & 2, 5 & 6 closed |
|----------------------------+-------------------------------|
| 33MHz | Pins 3 & 4, 5 & 6 closed |
|----------------------------+-------------------------------|
| 50iMHz | Pins 1 & 2, 5 & 6 closed |
|----------------------------+-------------------------------|
| 66iMHz | Pins 3 & 4, 5 & 6 closed |
|----------------------------+-------------------------------|
| 100iMHz | Pins 3 & 4, 5 & 6 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JC1 | JC2 | JC3 | JC4 |
|--------------+--------------+------------+--------+--------|
| SL80486SX | Pins 2 & 3 | Pins 2 & 3 | Closed | Closed |
| | closed | closed | | |
|--------------+--------------+------------+--------+--------|
| SL80486DX | Pins 1 & 2 | Pins 1 & 2 | Open | Open |
| | closed | closed | | |
|--------------+--------------+------------+--------+--------|
| SL80486DX2 | Pins 1 & 2 | Pins 1 & 2 | Open | Open |
| | closed | closed | | |
|--------------+--------------+------------+--------+--------|
| SL80486DX4 | Pins 1 & 2 | Pins 1 & 2 | Open | Open |
| | closed | closed | | |
|--------------+--------------+------------+--------+--------|
| 486Overdrive | Pins 1 & 2 | Pins 1 & 2 | Open | Open |
| | closed | closed | | |
+------------------------------------------------------------+