Memory

The number and type of features you can run on your printer simultaneously depend on the amount of RAM you have and how that RAM is distributed. Your printer comes with either 12 MB or 24 MB of RAM, but it is upgradable to 64 MB by adding Single In-line Memory Modules (SIMMs).

RAM Disk

Also called a virtual disk, the RAM disk is an area of RAM that is used to simulate an additional hard disk. Data can be written and read more quickly than on a hard disk, but a RAM disk loses any information stored on it when the printer's power is turned off. The spooling buffer is a RAM disk client if a hard disk is not available.

SCSI (Small Computer System Interface)

The printer’s SCSI port (located on an optional IDE-SCSI board) allows you to connect up to three optional SCSI hard disks, providing storage for fonts, emulations, and other files. Hard disks are also used to increase the amount of collation that can be accepted and provide a secondary storage area for spooled data, while providing virtual memory capabilities.

IDE (Integrated Drive Electronics)

The optional IDE-SCSI board also allows you to connect an internal IDE hard disk. “Integrated” refers to the fact that all of the controller electronics are on the drive itself, so no separate adapter card or expansion slot is required.

Volatile Memory

This type of memory is cleared when the printer is turned off. For example, most RAM is volatile.

Non-volatile Memory

This type of memory is not lost when the printer loses power.

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QMS 1660 Print System Reference