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# UNIDENTIFIED
C1-XT TURBO MODEL 615
Processor 8088
Processor Speed 4/10MHz
Chip Set VLSI
Max. Onboard DRAM 1MB
Cache None
BIOS Unidentified
Dimensions 220mm x 220mm
I/O Options None
NPU Options 8087
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| Speaker | JP1 | Reset switch | JP3 |
|---------------------+----------+----------------+----------|
| Power LED & keylock | JP2 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Switch | Position |
|----------------------------------------+--------+----------|
| » | Parity disabled | SW/1 | On |
|---+------------------------------------+--------+----------|
| | Paity enabled | SW/1 | Off |
|---+------------------------------------+--------+----------|
| » | NPU disabled | SW/2 | On |
|---+------------------------------------+--------+----------|
| | NPU enabled | SW/2 | Off |
|---+------------------------------------+--------+----------|
| » | Turbo enabled | SW1/1 | On |
|---+------------------------------------+--------+----------|
| | Turbo disabled | SW1/1 | Off |
|---+------------------------------------+--------+----------|
| » | RAM wait state select 1 wait state | SW1/2 | On |
|---+------------------------------------+--------+----------|
| | RAM wait state select 0 wait | SW1/2 | Off |
| | states | | |
|---+------------------------------------+--------+----------|
| » | ROM wait state select 1 wait state | SW1/3 | On |
|---+------------------------------------+--------+----------|
| | ROM wait state select 0 wait | SW1/3 | Off |
| | states | | |
|---+------------------------------------+--------+----------|
| » | Memory size select 640KB | SW1/4 | On |
|---+------------------------------------+--------+----------|
| | Memory size select 1MB | SW1/4 | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | Bank 4 |
|-------+---------+---------+----------+----------+----------|
| 512KB | (8) | NONE | (4) | NONE | NONE |
| | 4164 | | 44256 | | |
|-------+---------+---------+----------+----------+----------|
| 640KB | (8) | (8) | (4) | NONE | NONE |
| | 4164 | 4164 | 44256 | | |
|-------+---------+---------+----------+----------+----------|
| 768KB | (8) | (8) | (4) | (2) | NONE |
| | 4164 | 4164 | 44256 | 44256 | |
|-------+---------+---------+----------+----------+----------|
| 1MB | (8) | (8) | (4) | (2) | (2) |
| | 4164 | 4164 | 44256 | 44256 | 44256 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM PARITY CONFIGURATION |
|------------------------------------------------------------|
| Size | Parity 0 | Parity 1 | Parity 2 | Parity | Parity |
| | | | | 3 | 4 |
|-------+----------+----------+----------+---------+---------|
| 512KB | (1) 4164 | NONE | (2) | NONE | NONE |
| | | | 41256 | | |
|-------+----------+----------+----------+---------+---------|
| 640KB | (1) 4164 | (1) 4164 | (2) | NONE | NONE |
| | | | 41256 | | |
|-------+----------+----------+----------+---------+---------|
| 768KB | (1) 4164 | (1) 4164 | (2) | (1) | NONE |
| | | | 41256 | 41256 | |
|-------+----------+----------+----------+---------+---------|
| 1MB | (1) 4164 | (1) 4164 | (2) | (1) | (1) |
| | | | 41256 | 41256 | 41256 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | SW/3 | SW/4 |
|--------------------+-------------------+-------------------|
| 512KB | Off | On |
|--------------------+-------------------+-------------------|
| 640KB | On | Off |
|--------------------+-------------------+-------------------|
| 768KB | Off | Off |
|--------------------+-------------------+-------------------|
| 1MB | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO CONFIGURATION |
|------------------------------------------------------------|
| Size | SW/5 | SW/6 |
|--------------------+-------------------+-------------------|
| Monochrome | Off | Off |
|--------------------+-------------------+-------------------|
| CGA | On | Off |
|--------------------+-------------------+-------------------|
| EGA | On | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOPPY DRIVE CONFIGURATION |
|------------------------------------------------------------|
| Drives installed | SW/7 | SW/8 |
|--------------------+-------------------+-------------------|
| 1 | On | On |
|--------------------+-------------------+-------------------|
| 2 | Off | On |
+------------------------------------------------------------+