XESS XStend XS40, Manual

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9
NET DIPSW<3> LOC=P9;
NET DIPSW<4> LOC=P6;
NET DIPSW<5> LOC=P77;
NET DIPSW<6> LOC=P70;
NET DIPSW<7> LOC=P66;
NET DIPSW<8> LOC=P69;
#
# PUSHBUTTON SWITCH CONNECTIONS (ACTIVE-LOW)
NET SPAREB LOC=P67;
NET RESETB LOC=P37;
•
Listing 4: Connections between the XStend DIP and pushbutton switches and the XS95.
# DIP SWITCH CONNECTIONS
NET DIPSW<1> LOC=P6;
NET DIPSW<2> LOC=P7;
NET DIPSW<3> LOC=P11;
NET DIPSW<4> LOC=P5;
NET DIPSW<5> LOC=P72;
NET DIPSW<6> LOC=P71;
NET DIPSW<7> LOC=P66;
NET DIPSW<8> LOC=P70;
#
# PUSHBUTTON SWITCH CONNECTIONS (ACTIVE-LOW)
NET SPAREB LOC=P67;
NET RESETB LOC=P10;
VGA Interface
The XStend Board provides an XS Board with an interface to a VGA monitor through
connector J5. (Version 1.2 and higher of the XS Boards already have their own VGA
interfaces, so the XStend circuitry is redundant for them.) The XS Board can drive the
active-low horizontal and vertical sync signals that control the width and height of the video
frame. The XS Board also has access to two bits each of red, green, and blue color
signals so it can generate pixels in any of 2
2
×2
2
×2
2
=64 different colors.
Listing 5 and Listing 6 show the connections from the XS40 and XS95 Boards to the
VGA interface of the XStend Board. (These pin assignments are identical to the pin
assignments for the XS Boards, which have their own VGA interfaces.)
•
Listing 5: Connections between the XStend VGA interface and the XS40.
# VGA CONNECTIONS
NET VSYNCB LOC=P67;
NET HSYNCB LOC=P19;
NET RED<1> LOC=P18;
NET RED<0> LOC=P23;
NET GREEN<1> LOC=P20;
NET GREEN<0> LOC=P24;
NET BLUE<1> LOC=P26;
NET BLUE<0> LOC=P25;