Poseidon is designed to accommodate an optional solid-state FlashDisk module. This module contains 32MB, 64MB, 128MB, 256MB or 512MB of solid-state non-volatile memory that operates like an IDE drive without requiring additional driver software support.
| Model | Capacity |
| FD-32-XT | 32MB |
| FD-64-XT | 64MB |
| FD-128-XT | 128MB |
| FD-256-XT | 256MB |
| FD-512-XT | 512MB |
The FlashDisk module installs directly on the IDE connector, CN2, and is held down with a spacer and two screws onto a mounting hole on the board.
For master mode, install the jumper on pins 3 and 4. For slave mode, install the jumper on pins 2 and 3.
| Setting | Value |
| Type | User |
| Cylinders | 489 for 32MB flashdisk |
| Heads | 4 for 32MB flashdisk |
| Sectors | 32 for 32MB flashdisk |
| Multi Sector Transfer | Disable |
| LBA Mode Control | Enable |
| 32 Bit I/O | Disable |
| Transfer Mode | Fast PIO 1 |
| Ultra DMA Mode | Disable |
Exit the BIOS and save the change. The system will now boot and recognize the FlashDisk module as drive C:.
The FlashDisk occupies the board’s 44-pin IDE connector and does not provide a pass-through connector. To utilize both the FlashDisk and a notebook drive, the Diamond Systems Corporation ACC-IDEEXT adapter and cables are required.
The 44-pin cable carries power from the CPU to the adapter board and powers the FlashDisk module and any drive using a 44-pin connector, such as a notebook hard drive.
A drive utilizing a 40-pin connector, such as a CD-ROM or full-size hard drive, requires an external power source through an additional cable. The power may be provided from the CPU’s power out connector, J12, or from one of the two 4-pin headers on the ACC-IDEEXT board. Poseidon cable no. 698006 may be used with either power connector to bring power to the drive.