Pc I/O; System Memory; Optional Usb Dasd; Usb Support - IBM 4800-741 Hardware Service Manual

PC I/O

The core chipsets have standard interfaces for the following devices:
v PS/2 keyboard and mouse
v Parallel printer
v Two RS-232 ports
Models 741, 742, 781 and 782 contain two additional RS-232 channels. Drivers are
required to enable these ports (for all operating systems) and are available through
the support page on the Web (http://www.ibm.com/solutions/retail/store/support and
then select support.) . Because these ports are PCI devices and fully Plug and Play
compliant, applications must use OS and BIOS calls to discover their locations in
the system's I/O map. Also, these applications must be able to share the PCI
interrupt structure, if interrupt support is required.
v USB
Note: USB 1.1 devices can be used with USB 2.0 ports (at USB 1.1 speeds), and

System memory

All system boards have two memory sockets. The factory-installed base memory
occupies one of the sockets. An empty socket depends upon the initial order for
base memory. Use only memory provided by IBM Retail. Note that not all third-party
memory modules work with every product. IBM performs extensive life and reliability
testing to insure that the memory offered by IBM will operate correctly over all
voltage and temperature ranges.

Optional USB DASD

External USB drives, such as HDD/ZIP, diskette or memory key, operate with the
product; IBM provides USB boot support. You have to test any specific USB device
not offered by IBM Retail prior to use. This requirement is especially necessary due
to the implementation differences between drive suppliers.

USB support

The SurePOS 720 contain two different USB subsystems. The base subsystem is
implemented on the main processor board and uses the core USB support provided
by the motherboard chipset. Model 721 supports the USB 1.1 standard; Models
741, 742, 781 and 782 support the USB 2.0 standard. All motherboard USB
controllers are Universal Host Controller Interface (UHCI) compliant.
Models 7x1
The POS USB PC ports are all driven from the POS riser card and comply with the
USB 1.1 standard. These controllers are all OHCI compliant (except those
machines containing the front-powered POS USB 2.0 port).
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SurePOS 700 Series: SurePOS 700-721/741/781, 722/742/782 Hardware Service Guide
– Model 721 supports two PC USB 1.1 compatible ports on the rear
– Model 741 and Model 781 support two PC USB 2.0 compatible ports on the
rear, and an additional two PC USB 2.0 ports on the front. These models also
have a powered 12V POS/USB port on the front, which is driven by the USB
controller on the riser card.
– Model 742, and 782 support two PC USB 2.0 compatible ports on the rear
and two additional USB 2.0 ports on the front. These models also have a
powered 12V POS/USB port on the front (except Model 722), which is driven
by the USB controller card on the planar.
USB 2.0 devices will work on USB 1.1 ports (at USB 1.1 speeds).
Updated July 14, 2008