INTRODUCTION
------------
This directory contains PRELIMINARY information on the Long Trail reference
design.  This reference design is provided by IBM to enable PowerPC OEM
customers to easily build Common Hardware Reference Platform (CHRP) compatible
desktop uniprocessor PowerPC systems.

This ftp site is intended for Alpha customers, IBM field representatives, IBM
technical marketing and key development partners.  The information is not
classified and may be distributed, but please use caution.

DISCLAMER
---------
Files may be in rough form and are generally written, or provided, for
engineers and programmers to develop a Long Trail system or clone.  The
documents may, and often do, change frequently.  It is the user's responsibility
to obtain the latest version.

FILE FORMAT
-----------
Non-Cadence design files are generally in postscript or text format.  The
file names are obviously geared toward a Unix workstation.  For a PC user,
the files must be renamed during transfer.  Several files in the pass2
subdirectory are Cadence design files.  Files with a .tar suffix are compound
files that have been "zipped".  Files with a .Z suffix have been compressed.


INDEX
-----
FILE NAME               BRIEF DESCRIPTION
============================================================================

/pass1 subdirectory

cpu_card_BOM.txt                CPU card Bill Of Materials
cpu-card_schem_x-xx.ps          CPU card schematics xx/xx/96 version
cpu_card_spec.ps                CPU card specification
ltbom_x.x_pass1.txt             Bill Of Materials pass1 version x.x
ltschem_x-xx_pass1.ps           Board schematics for pass1 xx/xx/96 version
ltec_pass1_winbond_1-xx.ps      Pass1 ECs #1-xx for boards w/Winbond
ltec_pass1_tollgate_1-xx.ps     Pass1 ECs #1-xx for boards w/Tollgate
ltec_append_pass1.ps            Pass1 Engineering Changes appendix
ltspec_x-xx_pass1.ps            Board specification for pass1 xx/xx/96 version
lt_blk_diag.ps                  Board logical block diagram for pass1
MRA_2.0_VLSI.ps                 VLSI MacROM Adapter card schematics
macrom_3.3v_spec.txt            3.3V MacROM specification
macrom_3.3V_schem.ps            3.3V MacROM schematics
macrom_gerber.tar.Z             Gerber files for MacROM build
macrom_BOM.txt                  3.3V MacROM Bill Of Materials
BUD_USER.PS                     Bring Up Drivers user guide


/pass2 subdirectory

ltBOM_x-xx_pass2.txt            Bill Of Marerials x-xx date
lt2bom.exe                      Board BOM in self-extracting ZIP file
lt2bom.ps.Z                     Board BOM in compressed postscript format
lt_bom.pdf                      BOM in pdf format
lt_tour.pdf                     Intro presentation in pdf format
ltschem_x-xx_pass2.ps           Board schematics for pass2 xx/xx/96 version
ltspec_x-xx_pass2.ps            Board specification for pass2 xx/xx/96 version
ltspec.pdf                      Board specification for pass2 in pdf format
WIREGUIDE2.TXT                  Board wiring guidelines for pass2
pass1.pass2.delta.ps            Pass1 to pass2 board differences summary
ltblkdiag_2B_pass2.ps           Board logical block diagram for pass2
lt_layout_pass2.ps              Board pass2 top placement plot
lt_testplan.ps                  Board Engineering Verification Test plan
bud.exe                         Self-extracting ZIP file - Bring Up Drivers image


/pass2.1 subdirectory

LT21F_brd0306.Z                 Board design file
LT21Fbom.txt0306                Board Bill Of Materials - text format
LT21Fschem.ps0306               pass 2.1 schematics - post script format
LT21Fschem_logic_bn_tar.Z       Cadance logic design files
pass2.1_EC.txt


APPLICATIONS ENGINEERING SUPPORT / SITE MAINTENANCE
----------------------------------------------------
Please contact me with any technical questions concerning the Long Trail
reference design or suggestions and/or problems with the ftp site.  I can
be reached @:

Rob Marshall
Phone:  (512) 838-7278
e-mail: rmarshal@us.ibm.com