Black Box PC471C, PC472C, PC470C, PC478C, PC473C manual Memory Advantages Disadvantages, Requirements

CHAPTER 4: Hardware Installation

Table 4-1describes the advantages and disadvantages of using the high and low memory configuration on your PCI or PCI Express adapter.

Table 4-1. Advantages and disadvantages of using the high and low memory

configuration

Memory	Advantages	Disadvantages
High Memory	Compatible with all PCI	Old legacy applications
	v2.1 compliant PCs.	may not work.
Low Memory	All legacy applications	May fail in some PCs
	will still work.	that reserve low memory.

The term “legacy application” refers to those applications that were built for Windows 3.x, or require the emulation card to be in low memory. Applications that use the Windows 95/98/NT driver directly are not affected by the memory resources held by the PCI card.

4.2.5PCI EXPRESS FEATURES

The PCI Express card contains three new features that provide improved performance and functionality.

Requirements

The OBS and 2 MHz features require the following hardware and software combination on the AS/400 in order to operate.

•Twinax controller: PCI WAN/Twinaxial IOA (FC 2720/9720) or PCI Twinaxial Workstation IOA 9FC 2722/9722) or Twinaxial Workstation IOA (FC 6180/9280)

•Operating system: OS/400 V4R1 or V4R2

•Cabling: Twinax cable with a maximum length of 4000 ft. (1219 m) for 2 MHz mode or 5000 ft. (1524 m) for OBS mode.

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