Family Members; Pt-Vme131/131E - Performance Computer PT-VME161 User Manual

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Section PT-VME161 INTRODUCTION

Family Members

The PT-VME161 and PT-VME161E are members of a family of PTI Extensible Single Board Computer/
Controllers. They each represent a highly integrated M68000-compatible MPU based VMEbus platform
designed to offer the user significant flexibility in meeting specific architectural requirements.
The base modules support all standard VMEbus data and operating modes including the newly defined
VME64 mode pioneered by Performance Technologies. Operating in VME64 mode the PT-VME161
can burst data over the VMEbus at rates up to 60 MBytes per second. This high speed transfer capability
makes the 161 ideal for applications that require maximum VMEbus utilization. The base modules
provide many I/O features tightly coupled to the MPU. These features include five DRAM capacities
from four to sixty-four megabytes, a Fast SCSI-2 interface with DMA support for direct flexible/hard
disk interconnect, and dual serial I/O ports for asynchronous communication connectivity.
In addition to the standard base module features, the PTI specs provide an option for even further
extending their single VMEbus slot functionality through its "EPAK" extension interface. This interface
provides for the addition of a plug-in daughterboard (EPAK) with selectable
current or future I/O needs. Performance Technologies offers "off-the-shelf" EPAKs which support
Ethernet, high speed synchronous communications, additional asynchronous serial I/O, etc. If these
EPAKs do not match the requirements, the user also has the option for a custom design based upon an
available wire wrap prototyping EPAK and supplied interface documentation. Contact Performance
Technologies for custom EPAK design quotations.
A key design criterion was to maintain user software compatibility across the family members. The
command and register set of the EMULEX SCSI controller on the PT-VME161, PT-VME151 and PT-
VME141 is a super set of the PT-VME131's NCR SCSI controller. The MC68060 of the PT-VME161
is user code compatible with the MC68030 of the PT-VME131, PT-VME141 and PT-VME151. These
and other design considerations were made to preserve your investment in code development. See "PT-
VME151A Differences From VME131/141" on page 94 for a discussion of the system level differences.

PT-VME131/131E

The features of the PT-VME131 and PT-VME131E are identical to the PT-VME161 with the following
exceptions:
• Advanced Thirty-Two Bit Microprocessor With Internal Cache
• 1, 2, 4, or 8 Megabytes of Shared DRAM
• Data/Address Register File (DARF32) ASIC (not VME64)
• SCSI-I Single Ended Interface
• No 82C54 CHMOS Programmable Interval Timer
6 Extensible Single Board Computer/Controller User's Manual
PT-VME131 utilizes 25 MHz 68030 MPU w/MMU
PT-VME131E utilizes 25 MHz 68EC030 MPU w/o MMU
VMEbus Master/Slave A32/A24/A16:D32/D16/D8(EO) Interface
Location Monitor with Message FIFO
Programmable Slave Address Mapping and Protection
Integral A32:D32 Local Bus to the VMEbus DMA Controller
NCR 53C94 Based
16 Bit DMA support to local DRAM
P2 SCSI Interconnect
functionality to meet