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<title>rtfTextController</title>
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<p><font size="6">rtfTextController</font></p>
<p><font size="5">Description</font></p>
<p><font size="4">This is a text mode video display controller that supports
color. The display memory is nine bits wide, allowing 512 different
simulataneous characters to be displayed. The controller uses several internal
memories.</font></p>
<table border="1" cellpadding="0" cellspacing="0" width="100%" style="border-left: 1.5pt solid black; border-right: 1.5pt solid black; border-top: 1.5pt solid black; border-bottom: .75pt solid black; background-color: white" fpstyle="27,011111100">
<tr>
<td width="27%" style="font-weight: bold; color: white; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: 1.5pt solid black; background-color: gray">
Address</td>
<td width="73%" style="font-weight: bold; color: white; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: 1.5pt solid black; background-color: gray">
Description</td>
</tr>
<tr>
<td width="27%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
$FFD0_xxxx</td>
<td width="73%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
text screen memory area, currently the controller only supports a 4k memory</td>
</tr>
<tr>
<td width="27%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
$FFD1_xxxx</td>
<td width="73%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
color attribute memory area, currently the controller only supports a 4k
memory</td>
</tr>
<tr>
<td width="27%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
$FFD2_xxxx</td>
<td width="73%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
character bitmap memory, currently the controller only supports a 4k memory,
which allows 512 8x8 character bitmaps.</td>
</tr>
<tr>
<td width="27%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
$FFDA_00xx</td>
<td width="73%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
text controller register area</td>
</tr>
<tr>
<td width="27%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"> </td>
<td width="73%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"> </td>
</tr>
</table>
<p style="margin-bottom: 0"> </p>
<p><font face="Arial"><b>Register Description</b></font></p>
<table border="1" cellspacing="0" width="90%" style="border-left:1.5pt solid black; border-right:1.5pt solid black; border-top:1.5pt solid black; border-bottom:.75pt solid black; background-color:white" cellpadding="2" fpstyle="27,011111100">
<tr>
<td width="11%" align="center" style="font-weight: bold; color: white; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: 1.5pt solid black; background-color: gray"><font face="Arial"><b>Reg. No.</b></font></td>
<td width="26%" style="font-weight: bold; color: white; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: 1.5pt solid black; background-color: gray"><b><font face="Arial">15
0</font></b></td>
<td width="28%" style="font-weight: bold; color: white; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: 1.5pt solid black; background-color: gray"><font face="Arial"><b>Function</b></font></td>
<td width="111%" style="font-weight: bold; color: white; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: 1.5pt solid black; background-color: gray"><font face="Arial"><b>Description</b></font></td>
</tr>
<tr>
<td width="11%" align="center" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">0</font></td>
<td width="26%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">
-------- nnnnnnnn</font></td>
<td width="28%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">number of columns</font></td>
<td width="111%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"> </td>
</tr>
<tr>
<td width="11%" align="center" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">1</font></td>
<td width="26%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">-------- nnnnnnnn</font></td>
<td width="28%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">number of row</font></td>
<td width="111%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"> </td>
</tr>
<tr>
<td width="11%" align="center" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">2</font></td>
<td width="26%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
---- nnnnnnnnnnnn</td>
<td width="28%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
window left</td>
<td width="111%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
Text window position- pixels before the display starts, referenced to the
end-of-line signal</td>
</tr>
<tr>
<td width="11%" align="center" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">3</font></td>
<td width="26%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">----
nnnnnnnnnnnn</font></td>
<td width="28%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">window top</font></td>
<td width="111%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">Text window position - scan lines down from the top of
the screen referenced tothe end-of-frame signal</font></td>
</tr>
<tr>
<td width="11%" align="center" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">4</font></td>
<td width="26%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">-------- --- nnnnn</font></td>
<td width="28%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">max scanline</font></td>
<td width="111%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">maximum scan
line used to display chars</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">default 7.</font></td>
</tr>
<tr>
<td width="11%" align="center" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">5</font></td>
<td width="26%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">--------
hhhh wwww</font></td>
<td width="28%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">pixel size</font></td>
<td width="111%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">pixel size in
video clocks and scan lines</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">default is 1
(2 video clocks per pixel) and 3 (four video scan lines per pixel).</font></td>
</tr>
<tr>
<td width="11%" align="center" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">8</font></td>
<td width="26%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">--------
--- sssss</font></td>
<td width="28%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">cursor start</font></td>
<td width="111%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">scan line cursor display starts on</font></td>
</tr>
<tr>
<td width="11%" align="center" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">9</font></td>
<td width="26%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">--------
--- eeeee</font></td>
<td width="28%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">cursor end</font></td>
<td width="111%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">scan line cursor display ends on</font></td>
</tr>
<tr>
<td width="11%" align="center" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">10</font></td>
<td width="26%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
aaaaaaaa aaaaaaaa</td>
<td width="28%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
display offset</td>
<td width="111%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">starting address of the text screen in the display
memory, defaults to zero</font></td>
</tr>
<tr>
<td width="11%" align="center" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">11</font></td>
<td width="26%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
aaaaaaaa aaaaaaaa</td>
<td width="28%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
cursor position</td>
<td width="111%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">location of the cursor in the display memory</font></td>
</tr>
<tr>
<td width="11%" align="center" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">12</font></td>
<td width="26%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">aaaaaaaa aaaaaaaa</font></td>
<td width="28%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">light pen position</font></td>
<td width="111%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">address of the light pen</font></td>
</tr>
<tr>
<td width="11%" align="center" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"> </td>
<td width="26%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"> </td>
<td width="28%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"> </td>
<td width="111%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"> </td>
</tr>
<tr>
<td width="11%" align="center" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"> </td>
<td width="26%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"> </td>
<td width="28%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"> </td>
<td width="111%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"> </td>
</tr>
</table>
<p style="margin-bottom: 0"> </p>
<p style="margin-bottom: 0"><b><span lang="en-ca">Module Interface Description</span></b></p>
<p style="margin-bottom: 0"><span lang="en-ca"><font face="Arial" size="4">
rtfTextController</font></span></p>
<p style="margin-bottom: 0; margin-top:0"><font face="Arial">
<font color="#00FF00">module</font> <span lang="en-ca">rtfTextController</span>(rst_i,
clk_i, cyc_i, stb_i, ack<span lang="en-ca">_o</span>, w<span lang="en-ca">e_i</span>, adr<span lang="en-ca">_i</span>, d<span lang="en-ca">at_i</span>, d<span lang="en-ca">at_o,
vclk, eol, eof, blank, border, rgbIn, rgbOut</span>);<br>
<br>
</font></p>
<table border="1" cellspacing="3" width="90%" style="border-left:1.5pt solid black; border-right:1.5pt solid black; border-top:1.5pt solid black; border-bottom:.75pt solid black; background-color:white" fpstyle="27,011111100">
<tr>
<td width="12%" style="font-weight: bold; color: white; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: 1.5pt solid black; background-color: gray"><span lang="en-ca"><b>
<font face="Arial" color="#000080">System</font></b></span></td>
<td width="91%" style="font-weight: bold; color: white; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: 1.5pt solid black; background-color: gray"><b><font face="Arial">Description</font></b></td>
</tr>
<tr>
<td width="12%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">rst_i</font></td>
<td width="91%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">This signal is normally connected to the
system reset signal. It resets the <span lang="en-ca">text controller</span>
interface forcing it to the <span lang="en-ca">reset</span> state. </font>
</td>
</tr>
<tr>
<td width="12%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">clk_i</font></td>
<td width="91%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial"><span lang="en-ca">T</span>his is usually
connected to the system clock and is used as a base timing clock for I/O
operations.</font></td>
</tr>
<tr>
<td width="103%" colspan="2" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font color="#000080">
<span lang="en-ca">Slave Port</span></font></td>
</tr>
<tr>
<td width="12%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">cyc_i</font></td>
<td width="91%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">indicates that a valid bus cycle is
taking place. The core will not respond to the bus unless this signal is
active.</font></td>
</tr>
<tr>
<td width="12%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">stb_i</td>
<td width="91%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">This strobe signal also indicates that a valid bus cycle is
taking place</td>
</tr>
<tr>
<td width="12%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">ack_o</font></td>
<td width="91%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">This signal indicates that the core has
processed the bus transaction (it is the logical and of cyc_i and stb_i).</font></td>
</tr>
<tr>
<td width="12%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">we_i</font></td>
<td width="91%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">This signal is used to signify a write
operation to the text controller<span lang="en-ca">.</span></font></td>
</tr>
<tr>
<td width="12%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">adr<span lang="en-ca">_i</span></font></td>
<td width="91%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">This
<span lang="en-ca">thirty-two bit </span>address b<span lang="en-ca">us
is </span>used
to address one of <span lang="en-ca">text controller</span></font><span lang="en-ca"><font face="Arial">s'</font></span><font face="Arial"><span lang="en-ca">s</span> registers
or internal memory. (Registers are described
below). </font><span lang="en-ca">
<font face="Arial">Registers respond to the address range $FFDA_00xx</font></span></p>
</td>
</tr>
<tr>
<td width="12%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">dat_i</font></td>
<td width="91%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">This is the <span lang="en-ca">sixteen</span>
bit data input bus to the <span lang="en-ca">text controller</span>.</font></td>
</tr>
<tr>
<td width="12%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">dat_o</font></td>
<td width="91%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">This is the <span lang="en-ca">sixteen</span> bit data output bus
from the text controller.</font></td>
</tr>
<tr>
<td width="103%" colspan="2" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<span lang="en-ca"><font color="#000080">Video</font></span><font color="#000080"><span lang="en-ca">
Ports</span></font></td>
</tr>
<tr>
<td width="12%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">vclk</font></td>
<td width="91%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
This input is the video clock input. Pixel timing is derived from it.</td>
</tr>
<tr>
<td width="12%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
eol</td>
<td width="91%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
This input signal signals the end of a video scanline (end-of-line)</td>
</tr>
<tr>
<td width="12%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">eof</font></td>
<td width="91%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">This <span lang="en-ca">input </span>signal indicates
<span lang="en-ca">the end of the video frame.</span></font></td>
</tr>
<tr>
<td width="12%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
blank</td>
<td width="91%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">This
input signal indicates that the display should be blanked. It is active
during the video blanking period.</font></td>
</tr>
<tr>
<td width="12%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<span lang="en-ca">border</span></td>
<td width="91%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
This input signal indicates that a border area is active.</td>
</tr>
<tr>
<td width="12%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">rgbIn</font></td>
<td width="91%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
This 24 bit input bus can be connected to an external RGB input. (The text
controller may display on top of the external input).</td>
</tr>
<tr>
<td width="12%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">rgbOut</font></td>
<td width="91%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
This output signal bus contains the 24 bit RGB display data.</td>
</tr>
<tr>
<td width="12%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><span lang="en-ca"><b>
<font face="Arial" color="#000080">Parameters</font></b></span></td>
<td width="91%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"> </td>
</tr>
<tr>
<td width="12%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
<font face="Arial">ROWS</font></td>
<td width="91%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white"><font face="Arial">Use this parameter to specify the
default number of text rows.</font></td>
</tr>
<tr>
<td width="12%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
COLS</td>
<td width="91%" style="font-weight: normal; color: black; border-left-style: none; border-right-style: none; border-top-style: none; border-bottom: .75pt solid black; background-color: white">
Use this parameter to specify the default number of text columns.</td>
</tr>
</table>
<p style="margin-top: 0; margin-bottom: 0"> </p>
<hr>
<p> </p>
<h1 style="margin-bottom: 0"><b><font size="4" face="Arial">WISHBONE Compatibility
Datasheet</font></b></h1>
<p style="margin-bottom: 0"><font face="Arial">The text controller core may be directly
interfaced to a WISHBONE compatible bus.</font></p>
<p style="margin-bottom: 0"> </p>
<table cellpadding="0" cellspacing="0" style="border-collapse: collapse; border-left-style: solid; border-left-width: 1; border-right-style: solid; border-right-width: 1; border-top-style: double; border-top-width: 3; border-bottom-style: solid; border-bottom-width: 1" width="65%">
<tr>
<td width="100%" colspan="3" bordercolor="#000000" style="border-style: solid; border-width: 1">
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">WISHBONE
Datasheet</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">WISHBONE SoC
Architecture Specification, Revision B.3</font></td>
</tr>
<tr>
<td width="45%" bordercolor="#000000" style="border-style: solid; border-width: 1">
<p style="margin-top: 0; margin-bottom: 0"> </td>
<td width="55%" colspan="2" bordercolor="#000000" style="border-style: solid; border-width: 1">
<p style="margin-top: 0; margin-bottom: 0"> </td>
</tr>
<tr>
<td width="45%" bordercolor="#000000" style="border-style: solid; border-width: 1">
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">Description:</font></td>
<td width="55%" colspan="2" bordercolor="#000000" style="border-style: solid; border-width: 1">
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">
Specifications:</font></td>
</tr>
<tr>
<td width="45%" bordercolor="#000000" style="border-style: solid; border-width: 1">
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">General
Description:</font></td>
<td width="55%" colspan="2" bordercolor="#000000" style="border-style: solid; border-width: 1">
<p style="margin-top: 0; margin-bottom: 0"><span lang="en-ca">
rtfTextController - Text mode video display controller</span></td>
</tr>
<tr>
<td width="45%" bordercolor="#000000" style="border-style: solid; border-width: 1">
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">Supported
Cycles:</font></td>
<td width="55%" colspan="2" bordercolor="#000000" style="border-style: solid; border-width: 1">
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">SLAVE, READ /
WRITE</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">SLAVE, BLOCK
READ / WRITE</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">SLAVE, RMW</font></td>
</tr>
<tr>
<td width="45%" bordercolor="#000000" style="border-style: solid; border-width: 1">
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">Data port,
size:</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">Data port,
granularity:</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">Data port,
maximum operand size:</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">Data transfer
ordering:</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">Data transfer
sequencing</font></td>
<td width="55%" colspan="2" bordercolor="#000000" style="border-style: solid; border-width: 1">
<p style="margin-top: 0; margin-bottom: 0"><span lang="en-ca">16</span><font face="Arial">
bit</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">
<span lang="en-ca">16</span> bit</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">
<span lang="en-ca">16</span> bit</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">Little Endian</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">any
(undefined)</font></td>
</tr>
<tr>
<td width="45%" bordercolor="#000000" style="border-style: solid; border-width: 1">
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">Clock
frequency constraints:</font></td>
<td width="55%" colspan="2" bordercolor="#000000" style="border-style: solid; border-width: 1"> </td>
</tr>
<tr>
<td width="45%" valign="top" bordercolor="#000000" style="border-style: solid; border-width: 1">
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">Supported
signal list and cross reference to equivalent WISHBONE signals</font></td>
<td width="25%" valign="top" bordercolor="#000000" style="border-style: solid; border-width: 1">
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">Signal Name:</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">ack<span lang="en-ca">_o</span></font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">adr<span lang="en-ca">_i(31:0)</span></font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">clk<span lang="en-ca">_i</span></font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">d<span lang="en-ca">at_i</span>(<span lang="en-ca">15</span>:0)</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">d<span lang="en-ca">a</span>t<span lang="en-ca">_o</span>(<span lang="en-ca">15</span>:0)</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">cyc<span lang="en-ca">_i</span></font></p>
<p style="margin-top: 0; margin-bottom: 0"><span lang="en-ca">stb_i</span></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">w<span lang="en-ca">e_i</span></font></td>
<td width="30%" bordercolor="#000000" style="border-style: solid; border-width: 1">
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">WISHBONE
Equiv.</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">ACK_O</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">ADR_I()</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">CLK_I</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">DAT_I()</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">DAT_O()</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">CYC_I</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">STB_I</font></p>
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">WE_I</font></p>
<p style="margin-top: 0; margin-bottom: 0"> </td>
</tr>
<tr>
<td width="45%" bordercolor="#000000" style="border-style: solid; border-width: 1">
<p style="margin-top: 0; margin-bottom: 0"><font face="Arial">Special
Requirements:</font></td>
<td width="55%" colspan="2" bordercolor="#000000" style="border-style: solid; border-width: 1">
<p style="margin-top: 0; margin-bottom: 0">external sync generator</td>
</tr>
</table>
<p style="margin-bottom: 0"> </p>
<p> </p>
</body>
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