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wudsn-ide/com.wudsn.ide.asm/help/www.oxyron.de/html/registers_gtia.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<HTML>
<HEAD>
<META HTTP-EQUIV="content-type" CONTENT="text/html;charset=iso-8859-1">
<META NAME="keywords" CONTENT="ctia, gtia, C014805, C014889, atari, registers">
<META NAME="author" CONTENT="Graham">
<TITLE>CTIA/GTIA reference</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF" LINK="#4040FF">
<P><FONT SIZE="+2">CTIA/GTIA (Graphic Television Interface Adapter) reference</FONT></P>
<TABLE BORDER="1" CELLSPACING="0" CELLPADDING="2" WIDTH="720">
<CAPTION><FONT SIZE="+1">CTIA/GTIA register set:</FONT></CAPTION>
<TR>
<TH WIDTH="11%"><FONT SIZE="-1">&nbsp;</FONT></TH>
<TH WIDTH="9%"><FONT SIZE="-1">&nbsp;</FONT></TH>
<TH WIDTH="10%"><FONT SIZE="-1">7</FONT></TH>
<TH WIDTH="10%"><FONT SIZE="-1">6</FONT></TH>
<TH WIDTH="10%"><FONT SIZE="-1">5</FONT></TH>
<TH WIDTH="10%"><FONT SIZE="-1">4</FONT></TH>
<TH WIDTH="10%"><FONT SIZE="-1">3</FONT></TH>
<TH WIDTH="10%"><FONT SIZE="-1">2</FONT></TH>
<TH WIDTH="10%"><FONT SIZE="-1">1</FONT></TH>
<TH WIDTH="10%"><FONT SIZE="-1">0</FONT></TH>
</TR>
<TR>
<TD><FONT SIZE="-1">$D000 (R)</FONT></TD><TD><FONT SIZE="-1">M0PF</FONT></TD>
<TD COLSPAN="4" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused &sup1;</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Missile 0 to playfield collision</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D000 (W)</FONT></TD><TD><FONT SIZE="-1">HPOSP0</FONT></TD>
<TD COLSPAN="8" ALIGN="CENTER"><FONT SIZE="-1">Horizontal position of player 0</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D001 (R)</FONT></TD><TD><FONT SIZE="-1">M1PF</FONT></TD>
<TD COLSPAN="4" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused &sup1;</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Missile 1 to playfield collision</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D001 (W)</FONT></TD><TD><FONT SIZE="-1">HPOSP1</FONT></TD>
<TD COLSPAN="8" ALIGN="CENTER"><FONT SIZE="-1">Horizontal position of player 1</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D002 (R)</FONT></TD><TD><FONT SIZE="-1">M2PF</FONT></TD>
<TD COLSPAN="4" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused &sup1;</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Missile 2 to playfield collision</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D002 (W)</FONT></TD><TD><FONT SIZE="-1">HPOSP2</FONT></TD>
<TD COLSPAN="8" ALIGN="CENTER"><FONT SIZE="-1">Horizontal position of player 2</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D003 (R)</FONT></TD><TD><FONT SIZE="-1">M3PF</FONT></TD>
<TD COLSPAN="4" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused &sup1;</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Missile 3 to playfield collision</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D003 (W)</FONT></TD><TD><FONT SIZE="-1">HPOSP3</FONT></TD>
<TD COLSPAN="8" ALIGN="CENTER"><FONT SIZE="-1">Horizontal position of player 3</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D004 (R)</FONT></TD><TD><FONT SIZE="-1">P0PF</FONT></TD>
<TD COLSPAN="4" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused &sup1;</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Player 0 to playfield collision</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D004 (W)</FONT></TD><TD><FONT SIZE="-1">HPOSM0</FONT></TD>
<TD COLSPAN="8" ALIGN="CENTER"><FONT SIZE="-1">Horizontal position of missile 0</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D005 (R)</FONT></TD><TD><FONT SIZE="-1">P1PF</FONT></TD>
<TD COLSPAN="4" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused &sup1;</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Player 1 to playfield collision</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D005 (W)</FONT></TD><TD><FONT SIZE="-1">HPOSM1</FONT></TD>
<TD COLSPAN="8" ALIGN="CENTER"><FONT SIZE="-1">Horizontal position of missile 1</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D006 (R)</FONT></TD><TD><FONT SIZE="-1">P2PF</FONT></TD>
<TD COLSPAN="4" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused &sup1;</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Player 2 to playfield collision</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D006 (W)</FONT></TD><TD><FONT SIZE="-1">HPOSM2</FONT></TD>
<TD COLSPAN="8" ALIGN="CENTER"><FONT SIZE="-1">Horizontal position of missile 2</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D007 (R)</FONT></TD><TD><FONT SIZE="-1">P3PF</FONT></TD>
<TD COLSPAN="4" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused &sup1;</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Player 3 to playfield collision</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D007 (W)</FONT></TD><TD><FONT SIZE="-1">HPOSM3</FONT></TD>
<TD COLSPAN="8" ALIGN="CENTER"><FONT SIZE="-1">Horizontal position of missile 3</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D008 (R)</FONT></TD><TD><FONT SIZE="-1">M0PL</FONT></TD>
<TD COLSPAN="4" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused &sup1;</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Missile 0 to player collision</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D008 (W)</FONT></TD><TD><FONT SIZE="-1">SIZEP0</FONT></TD>
<TD COLSPAN="6" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused</FONT></TD>
<TD COLSPAN="2" ALIGN="CENTER"><FONT SIZE="-1">Player 0 size</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D009 (R)</FONT></TD><TD><FONT SIZE="-1">M1PL</FONT></TD>
<TD COLSPAN="4" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused &sup1;</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Missile 1 to player collision</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D009 (W)</FONT></TD><TD><FONT SIZE="-1">SIZEP1</FONT></TD>
<TD COLSPAN="6" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused</FONT></TD>
<TD COLSPAN="2" ALIGN="CENTER"><FONT SIZE="-1">Player 1 size</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D00A (R)</FONT></TD><TD><FONT SIZE="-1">M2PL</FONT></TD>
<TD COLSPAN="4" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused &sup1;</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Missile 2 to player collision</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D00A (W)</FONT></TD><TD><FONT SIZE="-1">SIZEP2</FONT></TD>
<TD COLSPAN="6" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused</FONT></TD>
<TD COLSPAN="2" ALIGN="CENTER"><FONT SIZE="-1">Player 2 size</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D00B (R)</FONT></TD><TD><FONT SIZE="-1">M3PL</FONT></TD>
<TD COLSPAN="4" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused &sup1;</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Missile 3 to player collision</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D00B (W)</FONT></TD><TD><FONT SIZE="-1">SIZEP3</FONT></TD>
<TD COLSPAN="6" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused</FONT></TD>
<TD COLSPAN="2" ALIGN="CENTER"><FONT SIZE="-1">Player 3 size</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D00C (R)</FONT></TD><TD><FONT SIZE="-1">P0PL</FONT></TD>
<TD COLSPAN="4" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused &sup1;</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Player 0 to player collision</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D00C (W)</FONT></TD><TD><FONT SIZE="-1">SIZEM</FONT></TD>
<TD COLSPAN="2" ALIGN="CENTER"><FONT SIZE="-1">Missile 3 size</FONT></TD>
<TD COLSPAN="2" ALIGN="CENTER"><FONT SIZE="-1">Missile 2 size</FONT></TD>
<TD COLSPAN="2" ALIGN="CENTER"><FONT SIZE="-1">Missile 1 size</FONT></TD>
<TD COLSPAN="2" ALIGN="CENTER"><FONT SIZE="-1">Missile 0 size</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D00D (R)</FONT></TD><TD><FONT SIZE="-1">P1PL</FONT></TD>
<TD COLSPAN="4" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused &sup1;</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Player 1 to player collision</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D00D (W)</FONT></TD><TD><FONT SIZE="-1">GRAFP0</FONT></TD>
<TD COLSPAN="8" ALIGN="CENTER"><FONT SIZE="-1">Player 0 graphic data</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D00E (R)</FONT></TD><TD><FONT SIZE="-1">P2PL</FONT></TD>
<TD COLSPAN="4" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused &sup1;</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Player 2 to player collision</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D00E (W)</FONT></TD><TD><FONT SIZE="-1">GRAFP1</FONT></TD>
<TD COLSPAN="8" ALIGN="CENTER"><FONT SIZE="-1">Player 1 graphic data</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D00F (R)</FONT></TD><TD><FONT SIZE="-1">P3PL</FONT></TD>
<TD COLSPAN="4" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused &sup1;</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Player 3 to player collision</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D00F (W)</FONT></TD><TD><FONT SIZE="-1">GRAFP2</FONT></TD>
<TD COLSPAN="8" ALIGN="CENTER"><FONT SIZE="-1">Player 2 graphic data</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D010 (R)</FONT></TD><TD><FONT SIZE="-1">TRIG0</FONT></TD>
<TD COLSPAN="7" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused &sup1;</FONT></TD>
<TD ALIGN="CENTER"><FONT SIZE="-1">/Trigger</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D010 (W)</FONT></TD><TD><FONT SIZE="-1">GRAFP3</FONT></TD>
<TD COLSPAN="8" ALIGN="CENTER"><FONT SIZE="-1">Player 3 graphic data</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D011 (R)</FONT></TD><TD><FONT SIZE="-1">TRIG1</FONT></TD>
<TD COLSPAN="7" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused &sup1;</FONT></TD>
<TD ALIGN="CENTER"><FONT SIZE="-1">/Trigger</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D011 (W)</FONT></TD><TD><FONT SIZE="-1">GRAFM</FONT></TD>
<TD COLSPAN="8" ALIGN="CENTER"><FONT SIZE="-1">Missiles graphic data</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D012 (R)</FONT></TD><TD><FONT SIZE="-1">TRIG2</FONT></TD>
<TD COLSPAN="7" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused &sup1;</FONT></TD>
<TD ALIGN="CENTER"><FONT SIZE="-1">/Trigger</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D012 (W)</FONT></TD><TD><FONT SIZE="-1">COLPM0</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Chroma</FONT></TD>
<TD COLSPAN="3" ALIGN="CENTER"><FONT SIZE="-1">Luma</FONT></TD>
<TD BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D013 (R)</FONT></TD><TD><FONT SIZE="-1">TRIG3</FONT></TD>
<TD COLSPAN="7" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused &sup1;</FONT></TD>
<TD ALIGN="CENTER"><FONT SIZE="-1">/Trigger</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D013 (W)</FONT></TD><TD><FONT SIZE="-1">COLPM1</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Chroma</FONT></TD>
<TD COLSPAN="3" ALIGN="CENTER"><FONT SIZE="-1">Luma</FONT></TD>
<TD BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D014 (R)</FONT></TD><TD><FONT SIZE="-1">PAL</FONT></TD>
<TD COLSPAN="4" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused &sup1;</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">$F (NTSC) / $1 (PAL)</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D014 (W)</FONT></TD><TD><FONT SIZE="-1">COLPM2</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Chroma</FONT></TD>
<TD COLSPAN="3" ALIGN="CENTER"><FONT SIZE="-1">Luma</FONT></TD>
<TD BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D015 (W)</FONT></TD><TD><FONT SIZE="-1">COLPM3</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Chroma</FONT></TD>
<TD COLSPAN="3" ALIGN="CENTER"><FONT SIZE="-1">Luma</FONT></TD>
<TD BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D016 (W)</FONT></TD><TD><FONT SIZE="-1">COLPF0</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Chroma</FONT></TD>
<TD COLSPAN="3" ALIGN="CENTER"><FONT SIZE="-1">Luma</FONT></TD>
<TD BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D017 (W)</FONT></TD><TD><FONT SIZE="-1">COLPF1</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Chroma</FONT></TD>
<TD COLSPAN="3" ALIGN="CENTER"><FONT SIZE="-1">Luma</FONT></TD>
<TD BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D018 (W)</FONT></TD><TD><FONT SIZE="-1">COLPF2</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Chroma</FONT></TD>
<TD COLSPAN="3" ALIGN="CENTER"><FONT SIZE="-1">Luma</FONT></TD>
<TD BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D019 (W)</FONT></TD><TD><FONT SIZE="-1">COLPF3</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Chroma</FONT></TD>
<TD COLSPAN="3" ALIGN="CENTER"><FONT SIZE="-1">Luma</FONT></TD>
<TD BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D01A (W)</FONT></TD><TD><FONT SIZE="-1">COLBK</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Chroma</FONT></TD>
<TD COLSPAN="3" ALIGN="CENTER"><FONT SIZE="-1">Luma</FONT></TD>
<TD BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D01B (W)</FONT></TD><TD><FONT SIZE="-1">PRIOR</FONT></TD>
<TD COLSPAN="2" ALIGN="CENTER"><FONT SIZE="-1">GTIA mode &sup2;</FONT></TD>
<TD ALIGN="CENTER"><FONT SIZE="-1">Overlap</FONT></TD>
<TD ALIGN="CENTER"><FONT SIZE="-1">5th Pl.</FONT></TD>
<TD COLSPAN="4" ALIGN="CENTER"><FONT SIZE="-1">Priority</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D01C (W)</FONT></TD><TD><FONT SIZE="-1">VDELAY</FONT></TD>
<TD ALIGN="CENTER"><FONT SIZE="-1">P3</FONT></TD>
<TD ALIGN="CENTER"><FONT SIZE="-1">P2</FONT></TD>
<TD ALIGN="CENTER"><FONT SIZE="-1">P1</FONT></TD>
<TD ALIGN="CENTER"><FONT SIZE="-1">P0</FONT></TD>
<TD ALIGN="CENTER"><FONT SIZE="-1">M3</FONT></TD>
<TD ALIGN="CENTER"><FONT SIZE="-1">M2</FONT></TD>
<TD ALIGN="CENTER"><FONT SIZE="-1">M1</FONT></TD>
<TD ALIGN="CENTER"><FONT SIZE="-1">M0</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D01D (W)</FONT></TD><TD><FONT SIZE="-1">GRACTL</FONT></TD>
<TD COLSPAN="5" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused</FONT></TD>
<TD ALIGN="CENTER"><FONT SIZE="-1">Latch Tr.</FONT></TD>
<TD ALIGN="CENTER"><FONT SIZE="-1">enable P</FONT></TD>
<TD ALIGN="CENTER"><FONT SIZE="-1">enable M</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D01E (W)</FONT></TD><TD><FONT SIZE="-1">HITCLR</FONT></TD>
<TD COLSPAN="8" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D01F (R)</FONT></TD><TD><FONT SIZE="-1">CONSOL</FONT></TD>
<TD COLSPAN="5" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused &sup1;</FONT></TD>
<TD ALIGN="CENTER"><FONT SIZE="-1">/Option</FONT></TD>
<TD ALIGN="CENTER"><FONT SIZE="-1">/Select</FONT></TD>
<TD ALIGN="CENTER"><FONT SIZE="-1">/Start</FONT></TD>
</TR>
<TR>
<TD><FONT SIZE="-1">$D01F (W)</FONT></TD><TD><FONT SIZE="-1">CONSOL</FONT></TD>
<TD COLSPAN="4" BGCOLOR="#E0E0E0" ALIGN="CENTER"><FONT SIZE="-1">unused</FONT></TD>
<TD ALIGN="CENTER"><FONT SIZE="-1">Reset?</FONT></TD>
<TD COLSPAN="3" ALIGN="CENTER"><FONT SIZE="-1">unknown</FONT></TD>
</TR>
</TABLE>
<BR>
&sup1; - Unused bits read back 0<BR>
&sup2; - Only available on GTIA<BR>
<BR><BR>
&copy; 2009-2010 Graham
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