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Home >> GE >> GE IS220PDIAH1A IS220PDIAH1B Contact Inputs: 24 discrete inputs

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GE IS220PDIAH1A IS220PDIAH1B Contact Inputs: 24 discrete inputs

From: | Author:Wang | Time :2024-12-18 | 111 visit: | Share:

The V7768/V7769 are single board computers loaded with either an Intel Core 2

Duo or Celeron M processor and compatible with modern industry standard

desktop systems. The V7768/V7769 therefore retain industry standard memory

and I/O maps along with a standard interrupt architecture. The integrated

peripherals described in this section (such as serial ports, USB ports,

CompactFlash drive, video controller and Ethernet controller) are all memory

mapped the same as similarly equipped desktop systems, ensuring compatibility

with modern operating systems.

The following sections describe the standard features of the V7768/V7769.

2.1 BGA CPU

The V7768 is factory populated with either an Intel Core 2 Duo or Celeron M

processor. The V7769 is factory populated with an Intel Core 2 Duo processor.

To change the memory size or CompactFlash size contact Customer Care to

receive a Return Material Authorization (RMA).

GE Customer Care is available at:

(1-800-433-2682), 1-780-401-7700.

Or, visit our website www.ge-ip.com.

2.2 Physical Memory

The V7768/V7769 provide DDR2 Synchronous DRAM (SDRAM) as system

memory. Memory can be accessed as bytes, words or longwords.

The SDRAM is accessible to the VME bus through the PCI-to-VME bridge and is

addressable by the local processor.

The V7768/V7769 have a maximum memory configuration of 2 GByte of DDR2

SDRAM memory. This configuration calls for a single 2 GByte SODIMM (one

200-pin SODIMM DDR2 module). The SDRAM is dual-ported to the VME

through the PCI-to-VME bridge and is addressable by the local processor, as well

as the VME slave interface by another VME master. Caution must be used when

sharing memory between the local processor and the VME to prevent a VME

deadlock and to prevent a VME master from overwriting the local processor’s

operating system.

NOTE

When using the Configure utility of GE’s IOWorks Access to configure RAM, do not request more

than 25 percent of the physical RAM. Exceeding the 25 percent limit may result in known bugs that

causes unpredictable behavior during the boot sequence, and requires the use of an emergency

repair disk to restore the computer. It is recommended that an emergency repair disk be kept upto-date and easily accessible.

The V7768/V7769 include 32 KByte of non-volatile SRAM which can be accessed

by the CPU at any time, and is used to store system data that must not be lost

during power-off conditions.

NOTE

Memory capacity may be extended as parts become available.

2.3 Memory Map

2.4 I/O Port Map

Like a desktop system, the V7768/V7769 include special input/output instructions

that access I/O peripherals residing in I/O addressing space (separate and distinct

from memory addressing space). Locations in I/O address space are referred to as

ports. When the CPU decodes and executes an I/O instruction, it produces a 16-bit

I/O address on lines A00 to A15 and identifies the I/O cycle with the M/I/O control

line. Thus, the CPU includes an independent 64 KByte I/O address space, which is

accessible as bytes, words or longwords.

Standard hardware circuitry reserves only 1,024 byte of I/O addressing space

from I/O $000 to $3FF for peripherals. All standard PC I/O peripherals, such as

serial and parallel ports, hard and floppy drive controllers, video system, realtime clock, system timers and interrupt controllers are addressed in this region of

I/O space. The BIOS initializes and configures all these registers properly;

adjusting these I/O ports directly is not normally necessary.

Table 2-1 Memory Map

Mode Memory Address Range Size Description

Protected Mode $FFFF 0000 - $FFFF FFFF 64 KByte ROM BIOS Image

$C000 0000 - $FFFE FFFF 0.9 GByte Unused*

$0010 0000 - $BFFF FFFF 3 GByte Reserved for **

Onboard Extended Memory

(not filled on all systems)

Real Mode $E0000 - $FFFFF 128 KByte

$C0000 - $DFFFF 128 KByte

$A0000 - $BFFFF 128 KByte

$00000 - $9FFFF 640 KByte

* This space can be used to set up protected mode PCI-to-VME windows (also referred to as PCI slave images). BIOS will also

map onboard PCI based NVRAM, Timers and Watchdog Timers in this area.

** This space can be allocated as shared memory (for example, between the BGA CPU and VME Master). Note that if a PMC

board is loaded, the expansion BIOS may be placed in this area.

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