3 <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
4 <META NAME="Author" CONTENT="Joshua Neal">
5 <META NAME="Description" CONTENT="Pure VGA/SVGA hardware programming (registers, identification, and otherlow-level stuff.)">
6 <META NAME="KeyWords" CONTENT="VGA SVGA hardware video programming">
7 <TITLE>VGA/SVGA Video Programming--VGA Field Index</TITLE>
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18 <HR WIDTH="100%"><B>Hardware Level VGA and SVGA Video Programming Information
21 <CENTER>VGA Field Index
22 <HR WIDTH="100%"></CENTER>
24 <CENTER><A HREF="#A">A</A> | <A HREF="#B">B</A> | <A HREF="#C">C</A> |
25 <A HREF="#D">D</A> | <A HREF="#E">E</A> | <A HREF="#F">F</A> | G | <A HREF="#H">H</A>
26 | <A HREF="#I">I</A> | J | K | <A HREF="#L">L</A> | <A HREF="#M">M</A>
27 | N | <A HREF="#O">O</A> | <A HREF="#P">P</A> | Q | <A HREF="#R">R</A>
28 | <A HREF="#S">S</A> | T | <A HREF="#U">U</A> | <A HREF="#V">V</A> | <A HREF="#W">W</A>
33 256-Color Shift Mode -- <A HREF="graphreg.htm#05">Graphics Mode Register</A></LI>
36 8-bit Color Enable -- <A HREF="attrreg.htm#10">Attribute Mode Control Register</A></LI>
39 9/8 Dot Mode -- <A HREF="seqreg.htm#01">Clocking Mode Register</A></LI>
42 <A NAME="A"></A>Address Wrap Select -- <A HREF="crtcreg.htm#17">CRTC Mode
43 Control Register</A></LI>
46 Alphanumeric Mode Disable -- <A HREF="graphreg.htm#06">Miscellaneous Graphics
50 Asynchronous Reset -- <A HREF="seqreg.htm#00">Reset Register</A></LI>
53 Attribute Address -- <A HREF="attrreg.htm#3C0">Attribute Address Register</A></LI>
56 Attribute Controller Graphics Enable -- <A HREF="attrreg.htm#10">Attribute
57 Mode Control Register</A></LI>
60 <A NAME="B"></A>Bit Mask -- <A HREF="graphreg.htm#08">Bit Mask Register</A></LI>
63 Blink Enable -- <A HREF="attrreg.htm#10">Attribute Mode Control Register</A></LI>
66 Byte Panning -- <A HREF="crtcreg.htm#08">Preset Row Scan Register</A></LI>
69 <A NAME="C"></A>Chain 4 Enable -- <A HREF="seqreg.htm#04">Sequencer Memory
70 Mode Register</A></LI>
73 Clock Select -- <A HREF="extreg.htm#3CCR3C2W">Miscellaneous Output Register</A></LI>
76 Chain Odd/Even Enable -- <A HREF="graphreg.htm#06">Miscellaneous Graphics
80 Character Set A Select -- <A HREF="seqreg.htm#03">Character Map Select
84 Character Set B Select -- <A HREF="seqreg.htm#03">Character Map Select
88 Color Compare -- <A HREF="graphreg.htm#02">Color Compare Register</A></LI>
91 Color Don't Care -- <A HREF="graphreg.htm#07">Color Don't Care Register</A></LI>
94 Color Plane Enable -- <A HREF="attrreg.htm#12">Color Plane Enable Register</A></LI>
97 Color Select 5-4 -- <A HREF="attrreg.htm#14">Color Select Register</A></LI>
100 Color Select 7-6 -- <A HREF="attrreg.htm#14">Color Select Register</A></LI>
103 CRTC Registers Protect Enable -- <A HREF="crtcreg.htm#11">Vertical Retrace
104 End Register</A></LI>
107 Cursor Disable -- <A HREF="crtcreg.htm#0A">Cursor Start Reguster</A></LI>
110 Cursor Location -- bits 15-8: <A HREF="crtcreg.htm#0E">Cursor Location
111 High Register</A>, bits 7-0: <A HREF="crtcreg.htm#0F">Cursor Location Low
115 Cursor Scan Line End -- <A HREF="crtcreg.htm#0B">Cursor End Register</A></LI>
118 Cursor Scan Line Start -- <A HREF="crtcreg.htm#0A">Cursor Start Reguster</A></LI>
121 Cursor Skew -- <A HREF="crtcreg.htm#0B">Cursor End Register</A></LI>
124 <A NAME="D"></A>DAC Data -- <A HREF="colorreg.htm#3C9">DAC Data Register</A></LI>
127 DAC Read Address -- <A HREF="colorreg.htm#3C7W">DAC Address Read Mode Register</A></LI>
130 DAC State -- <A HREF="colorreg.htm#3C7R">DAC State Register</A></LI>
133 DAC Write Address -- <A HREF="colorreg.htm#3C8">DAC Address Write Mode
137 Display Disabled -- <A HREF="extreg.htm#3xAR">Input Status #1 Register</A></LI>
140 Display Enable Skew -- <A HREF="crtcreg.htm#03">End Horizontal Blanking
144 Divide Memory Address Clock by 4 -- <A HREF="crtcreg.htm#14">Underline
145 Location Register</A></LI>
148 Divide Scan Line Clock by 2 -- <A HREF="crtcreg.htm#17">CRTC Mode Control
152 Dot Clock Rate -- <A HREF="seqreg.htm#01">Clocking Mode Register</A></LI>
155 Double-Word Addressing -- <A HREF="crtcreg.htm#14">Underline Location Register</A></LI>
158 <A NAME="E"></A>Enable Set/Reset -- <A HREF="graphreg.htm#01">Enable Set/Reset
162 Enable Vertical Retrace Access -- <A HREF="crtcreg.htm#03">End Horizontal
163 Blanking Register</A></LI>
166 End Horizontal Display -- <A HREF="crtcreg.htm#01">End Horizontal Display
170 End Horizontal Blanking -- bit 5: <A HREF="crtcreg.htm#05">End Horizontal
171 Retrace Register</A>, bits 4-0: <A HREF="crtcreg.htm#03">End Horizontal
172 Blanking Register</A>,</LI>
175 End Horizontal Retrace -- <A HREF="crtcreg.htm#05">End Horizontal Retrace
179 End Vertical Blanking -- <A HREF="crtcreg.htm#16">End Vertical Blanking
183 Extended Memory -- <A HREF="seqreg.htm#04">Sequencer Memory Mode Register</A></LI>
186 <A NAME="F"></A>Feature Control Bit 0 -- <A HREF="extreg.htm#3CAR3xAW">Feature
187 Control Register</A></LI>
190 Feature Control Bit 1 -- <A HREF="extreg.htm#3CAR3xAW">Feature Control
194 <A NAME="H"></A>Horizontal Retrace Skew -- <A HREF="crtcreg.htm#05">End
195 Horizontal Retrace Register</A></LI>
198 Horizontal Sync Polarity -- <A HREF="extreg.htm#3CCR3C2W">Miscellaneous
199 Output Register</A></LI>
202 Horizontal Total -- <A HREF="crtcreg.htm#00">Horizontal Total Register</A></LI>
205 Host Odd/Even Memory Read Addressing Enable -- <A HREF="graphreg.htm#05">Graphics
206 Mode Register</A></LI>
209 Host Odd/Even Memory Write Addressing Enable -- <A HREF="seqreg.htm#04">Sequencer
210 Memory Mode Register</A></LI>
213 <A NAME="I"></A>Input/Output Address Select -- <A HREF="extreg.htm#3CCR3C2W">Miscellaneous
214 Output Register</A></LI>
217 Internal Palette Index -- <A HREF="attrreg.htm#000F">Palette Registers</A></LI>
220 <A NAME="L"></A>Line Compare -- bit 9: <A HREF="crtcreg.htm#09">Maximum
221 Scan Line Register</A>, bit 8: <A HREF="crtcreg.htm#07">Overflow Register</A>,
222 bits 7-0: <A HREF="crtcreg.htm#18">Line Compare Register</A></LI>
225 Line Graphics Enable -- <A HREF="attrreg.htm#10">Attribute Mode Control
229 Logical Operation -- <A HREF="graphreg.htm#03">Data Rotate Register</A></LI>
232 <A NAME="M"></A>Map Display Address 13 -- <A HREF="crtcreg.htm#17">CRTC
233 Mode Control Register</A></LI>
236 Map Display Address 14 -- <A HREF="crtcreg.htm#17">CRTC Mode Control Register</A></LI>
239 Maximum Scan Line -- <A HREF="crtcreg.htm#09">Maximum Scan Line Register</A></LI>
242 Memory Map Select -- <A HREF="graphreg.htm#06">Miscellaneous Graphics Register</A></LI>
245 Memory Plane Write Enable -- <A HREF="seqreg.htm#02">Map Mask Register</A></LI>
248 Memory Refresh Bandwidth -- <A HREF="crtcreg.htm#11">Vertical Retrace End
252 Monochrome Emulation -- <A HREF="attrreg.htm#10">Attribute Mode Control
256 <A NAME="O"></A>Odd/Even Page Select -- <A HREF="extreg.htm#3CCR3C2W">Miscellaneous
257 Output Register</A></LI>
260 Offset -- <A HREF="crtcreg.htm#13">Offset Register</A></LI>
263 Overscan Palette Index -- <A HREF="attrreg.htm#11">Overscan Color Register</A></LI>
266 <A NAME="P"></A>Palette Address Source -- <A HREF="attrreg.htm#3C0">Attribute
267 Address Register</A></LI>
270 Palette Bits 5-4 Select -- <A HREF="attrreg.htm#10">Attribute Mode Control
274 Pixel Panning Mode -- <A HREF="attrreg.htm#10">Attribute Mode Control Register</A></LI>
277 Pixel Shift Count -- <A HREF="attrreg.htm#13">Horizontal Pixel Panning
281 Preset Row Scan -- <A HREF="crtcreg.htm#08">Preset Row Scan Register</A></LI>
284 <A NAME="R"></A>RAM Enable -- <A HREF="extreg.htm#3CCR3C2W">Miscellaneous
285 Output Register</A></LI>
288 Read Map Select -- <A HREF="graphreg.htm#04">Read Map Select Register</A></LI>
291 Read Mode - <A HREF="graphreg.htm#05">Graphics Mode Register</A></LI>
294 Rotate Count -- <A HREF="graphreg.htm#03">Data Rotate Register</A></LI>
297 <A NAME="S"></A>Scan Doubling -- <A HREF="crtcreg.htm#09">Maximum Scan
298 Line Register</A></LI>
301 Screen Disable -- <A HREF="seqreg.htm#01">Clocking Mode Register</A></LI>
304 Set/Reset -- <A HREF="graphreg.htm#00">Set/Reset Register</A></LI>
307 Shift Four Enable -- <A HREF="seqreg.htm#01">Clocking Mode Register</A></LI>
310 Shift/Load Rate -- <A HREF="seqreg.htm#01">Clocking Mode Register</A></LI>
313 Shift Register Interleave Mode -- <A HREF="graphreg.htm#05">Graphics Mode
317 Start Address -- bits 15-8: <A HREF="crtcreg.htm#0C">Start Address High
318 Register</A>, bits 7-0: <A HREF="crtcreg.htm#0D">Start Address Low Register</A></LI>
321 Start Horizontal Blanking -- <A HREF="crtcreg.htm#02">Start Horizontal
322 Blanking Register</A></LI>
325 Start Horizontal Retrace -- <A HREF="crtcreg.htm#04">Start Horizontal Retrace
329 Start Vertical Blanking -- bit 9: <A HREF="crtcreg.htm#09">Maximum Scan
330 Line Register</A>, bit 8: <A HREF="crtcreg.htm#07">Overflow Register</A>,
331 bits 7-0: <A HREF="crtcreg.htm#15">Start Vertical Blanking Register</A></LI>
334 Switch Sense -- <A HREF="extreg.htm#3C2R">Input Status #0 Register</A></LI>
337 Sync Enable -- <A HREF="crtcreg.htm#17">CRTC Mode Control Register</A></LI>
340 Sycnchronous Reset -- <A HREF="seqreg.htm#00">Reset Register</A></LI>
343 <A NAME="U"></A>Underline Location -- <A HREF="crtcreg.htm#14">Underline
344 Location Register</A></LI>
347 <A NAME="V"></A>Vertical Display End -- bits 9-8: <A HREF="crtcreg.htm#07">Overflow
348 Register</A>, bits 7-0: <A HREF="crtcreg.htm#12">Vertical Display End Register</A></LI>
351 Vertical Retrace -- <A HREF="extreg.htm#3xAR">Input Status #1 Register</A></LI>
354 Vertical Retrace End -- <A HREF="crtcreg.htm#11">Vertical Retrace End Register</A></LI>
357 Vertical Retrace Start -- bits 9-8: <A HREF="crtcreg.htm#07">Overflow Register</A>,
358 bits 7-0: <A HREF="crtcreg.htm#10">Vertical Retrace Start Register</A></LI>
361 Vertical Sync Polarity -- <A HREF="extreg.htm#3CCR3C2W">Miscellaneous Output
365 Vertical Total -- bits 9-8: <A HREF="crtcreg.htm#07">Overflow Register</A>,
366 bits 7-0: <A HREF="crtcreg.htm#06">Vertical Total Register</A></LI>
369 <A NAME="W"></A>Word/Byte Mode Select -- <A HREF="crtcreg.htm#17">CRTC
370 Mode Control Register</A></LI>
373 Write Mode -- <A HREF="graphreg.htm#05">Graphics Mode Register</A></LI>
377 <P>Notice: All trademarks used or referred to on this page are the property
378 of their respective owners.
379 <BR>All pages are Copyright © 1997, 1998, J. D. Neal, except where
380 noted. Permission for utilization and distribution is subject to the terms
381 of the <A HREF="license.htm">FreeVGA Project Copyright License</A>.