GE IS220PDIAH1A IS220PDIAH1B Contact Inputs: 24 discrete inputs
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.