This adapter will enable you to connect a 50 pin CD-ROM data cable to 40 pin ATA bus. 
(40 PIN IDC FEMALE at the cable)
unknow 50 pin connector at the notebook CD-ROM device
| ATA (40) Pin | CD-ROM (50) Pin | Name | Description | | | 1 | Audio Left | audio left | | | 2 | Audio Right | audio right | | | 3 | Audio ground | audio ground | | 2 | 4 | GND | Ground | | 1 | 5 | /RESET | Reset | | 4 | 6 | DD8 | Data 8 | | 3 | 7 | DD7 | Data 7 | | 6 | 8 | DD9 | Data 9 | | 5 | 9 | DD6 | Data 6 | | 8 | 10 | DD10 | Data 10 | | 7 | 11 | DD5 | Data 5 | | 10 | 12 | DD11 | Data 11 | | 9 | 13 | DD4 | Data 4 | | 12 | 14 | DD12 | Data 12 | | 11 | 15 | DD3 | Data 3 | | 14 | 16 | DD13 | Data 13 | | 13 | 17 | DD2 | Data 2 | | 16 | 18 | DD14 | Data 14 | | 15 | 19 | DD1 | Data 1 | | 18 | 20 | DD15 | Data 15 | | 17 | 21 | DD0 | Data 0 | | 21 | 22 | DMARQ | DMA Request | | 19 | 23 | GND | Ground | | 25 | 24 | /DIOR | Read Strobe | | 23 | 25 | /DIOW | Write Strobe | | 22 | 26 | GND | Ground | | 27 | 27 | IORDY | I/O Ready | | 29 | 28 | /DMACK | DMA Acknowledge | | 31 | 29 | INTRQ | Interrupt Request | | 32 | 30 | /IOCS16 | IO ChipSelect 16 | | 33 | 31 | DA1 | Address 1 | | 34 | 32 | PDIAG | Passed Diagnostics | | 35 | 33 | DA0 | Address 0 | | 36 | 34 | DA2 | Address 2 | | 37 | 35 | /IDE_CS0 | (1F0-1F7) | | 38 | 36 | /IDE_CS1 | (3F6-3F7) | | 39 | 37 | /ACTIVE - /DASI - DASP | Led driver | | +5V | 38 | +5V | + 5 volts power | | +5V | 39 | +5V | + 5 volts power | | +5V | 40 | +5V | + 5 volts power | | +5V | 41 | +5V | + 5 volts power | | +5V | 42 | +5V | + 5 volts power | | 24 | 43 | GND | Ground | | 26 | 44 | GND | Ground | | 30 | 45 | GND | Ground | | 40 | 46 | GND | Ground | | 28 | 47 | Device Cfg | Spindle Sync or Cable Select | | GROUND | 48 | GND | Ground | | | 49 | reserved | Vendor Unique | | | 50 | reserved | Vendor Unique |
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