/usr/share/pcb/m4/pci.inc is in pcb-common 20110918-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# Definitions for PCI boards
# by D.J. Barrow dj_barrow@ariasoft.ie
#
# please note that you will need to edit the saved pcb file
# by hand to move the board outline onto a seperate layer
# I suggest one of the unused layers.
define(`GETNUMARRAYS',`eval(($#)/2)')
# $1: canonical name
# $2: name on PCB
# $3: boardheight,number of pins,arcradius,..., number of pins
define(`PKG_PCIPINARRAY',
`
define(`cnt',`1')
define(`ARGS',`$4, $5, $6, $7')
args(ARGS)
define(`LEFTOFFSET',`100')
define(`EDGEGAP',`12')
define(`PINDIST',`50')
define(`PINWIDTH',`25')
define(`NUMARRAYS',`GETNUMARRAYS(ARGS)')
define(`TOTALPINS1',forloop(`IDX',0,eval(NUMARRAYS-1),
``arg'eval((IDX*2)+2) + ')0)
define(`TOTALPINS',eval(TOTALPINS1))
ifelse(1,eval(NUMARRAYS>1),`
define(`TOTALDIAMETER1',forloop(`IDX',0,eval(NUMARRAYS-2),
``arg'eval((IDX*2)+3) + ')0)
define(`TOTALDIAMETER',eval(TOTALDIAMETER1))
')
define(`PINCENTER',`eval(LEFTOFFSET+(PINDIST/2))')
define(`PINRADIUS',`eval(PINWIDTH/2)')
define(`PINLEFT',`eval(PINCENTER-PINRADIUS)')
define(`PINRIGHT',`eval(PINCENTER+PINRADIUS)')
define(`PENWIDTH',`eval(PINRADIUS+4)')
define(`PENRADIUS',`eval(PENWIDTH/2)')
define(`MAXIDX',`eval(TOTALPINS - 1)')
define(`ARRAYWIDTH', `eval((TOTALPINS*PINDIST)+TOTALDIAMETER)')
define(`CENTERX', `eval(((ARRAYWIDTH+LEFTOFFSET)/2))')
define(`MINY',`20')
define(`MIDY',`220')
define(`MAXY',`270')
define(`ARCRADIUS',`12')
define(`ARCDIAMETER',`eval(ARCRADIUS*2)')
define(`LMAXY',`eval(MAXY+ARCRADIUS)')
define(`BOARDTOP',`eval(LMAXY-arg1)')
define(`SCREWBORDER',275)
Element(0x00 "$1" "`$2'" "$3" CENTERX 10 1 30 0x00)
(
Mark(CENTERX 135)
define(`ADDSIDE',0)
define(`FLAG',0x0)
define(`LOOPIDX1',eval(NUMARRAYS-1))
define(`LEFT1',`eval(PINLEFT-ARCRADIUS)')
define(`ARCRADIUS2',`100')
define(`SLOTWIDTH',`1000')
define(`BRACKETLEFT',`-1525')
define(`LEFT2',`eval(LEFT1-ARCRADIUS2)')
define(`LEFT3',`eval(LEFT1+ARCRADIUS2-SLOTWIDTH)')
define(`LEFT4',`eval(LEFT1-SLOTWIDTH)')
ElementArc(LEFT2 0 ARCRADIUS2 ARCRADIUS2 180 90 1)
ElementLine(LEFT2 -ARCRADIUS2 LEFT3 -ARCRADIUS2 1)
ElementArc(LEFT3 0 ARCRADIUS2 ARCRADIUS2 270 90 1)
ElementLine(LEFT4 0 LEFT4 MAXY 1)
define(`LEFT5',`eval(LEFT4-ARCRADIUS)')
ElementArc(LEFT5 MAXY ARCRADIUS ARCRADIUS 90 90 1)
ElementLine(LEFT5 LMAXY BRACKETLEFT LMAXY 1)
forloop(`SIDE',0,1,
`
define(`IDX',`0')
define(`ADDDIAMETER',`0')
forloop(`IDX1',0,LOOPIDX1,
`
define(`CURRNUMPINS',`arg'eval((IDX1*2)+2))
ifelse(SIDE,`0',`
define(`CURRLEFT',`eval((PINDIST*IDX)+(ADDDIAMETER)+PINLEFT)')
define(`CURRRIGHT',`eval(CURRLEFT+((CURRNUMPINS-1)*PINDIST)+PINWIDTH)')
ElementLine(CURRLEFT LMAXY CURRRIGHT LMAXY 2)
ElementArc(CURRLEFT MAXY ARCRADIUS ARCRADIUS 0 90 2)
ElementArc(CURRRIGHT MAXY ARCRADIUS ARCRADIUS 90 90 2)
define(`CURRLEFT1',`eval(CURRLEFT-ARCRADIUS)')
define(`CURRRIGHT1',`eval(CURRRIGHT+ARCRADIUS)')
ElementLine(CURRLEFT1 0 CURRLEFT1 MAXY 1)
ElementLine(CURRRIGHT1 0 CURRRIGHT1 MAXY 1)
ifelse(1,eval((NUMARRAYS>1)&&(IDX1<LOOPIDX1)),`
define(`CURRDIAMETER',`arg'eval((IDX1*2)+3))
define(`CURRRADIUS',`eval(CURRDIAMETER/2)')
ElementArc(eval(CURRRIGHT+EDGEGAP+(CURRDIAMETER/2)) 0 CURRRADIUS CURRRADIUS 180 180 1)
')
ifelse(1,eval(IDX1==LOOPIDX1),`
ElementLine(BRACKETLEFT LMAXY BRACKETLEFT BOARDTOP 1)
ElementLine(BRACKETLEFT BOARDTOP CURRRIGHT1 BOARDTOP 1)
ElementLine(CURRRIGHT1 BOARDTOP CURRRIGHT1 0 1)
ElementArc(eval(BRACKETLEFT+SCREWBORDER) eval(LMAXY-SCREWBORDER) 125 125 0 360 1)
ElementArc(eval(BRACKETLEFT+SCREWBORDER) eval(BOARDTOP+SCREWBORDER) 125 125 0 360 1)
')
')
forloop(`IDX2',0,eval(CURRNUMPINS-1),
`
define(`CURRX',`eval((PINDIST*IDX)+(ADDDIAMETER))')
define(`MINX',`eval(PINLEFT+CURRX)')
define(`MIDX',`eval(PINCENTER+CURRX)')
define(`MAXX',`eval(PINRIGHT+CURRX)')
define(`PINIDX',`eval(IDX+1+ADDSIDE)')
EDGECONN(MINX,MINY,MAXX,MINY,PENWIDTH,PINIDX,FLAG)
EDGECONN(MINX,MINY,MINX,MIDY,PENWIDTH,PINIDX,FLAG)
EDGECONN(MINX,MIDY,MIDX,MAXY,PENWIDTH,PINIDX,FLAG)
EDGECONN(MIDX,MINY,MIDX,MAXY,PENWIDTH,PINIDX,FLAG)
EDGECONN(MAXX,MINY,MAXX,MIDY,PENWIDTH,PINIDX,FLAG)
EDGECONN(MAXX,MIDY,MIDX,MAXY,PENWIDTH,PINIDX,FLAG)
define(`IDX',incr(IDX))
')
ifelse(1,eval((NUMARRAYS>1)&&(IDX1<LOOPIDX1)),`
define(`ADDDIAMETER1',forloop(`IDX2',0,eval(IDX1),
``arg'eval((IDX2*2)+3)+')0)
define(`ADDDIAMETER',eval(ADDDIAMETER1+(EDGEGAP*2)-PINDIST+PINWIDTH))
')
')
define(`ADDSIDE',`TOTALPINS')
define(`FLAG',0x80)
')
)')
define(`PKG_PCI5V_AVE_HEIGHT', `PKG_PCIPINARRAY(`$1', `$2', `$3', 2810,49,100,11)');
define(`PKG_PCI5V_MIN_HEIGHT', `PKG_PCIPINARRAY(`$1', `$2', `$3', 1420,49,100,11)');
define(`PKG_PCI5V_MAX_HEIGHT', `PKG_PCIPINARRAY(`$1', `$2', `$3', 4200,49,100,11)');
define(`PKG_PCI5V_SMALL_HEIGHT', `PKG_PCIPINARRAY(`$1', `$2', `$3', 2063,49,100,11)');
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