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Assembly (NASM) format, 4 years 6 months old, and 1,014 hits.

Paste Description for VESA GDI driver

castawayed VGA driver
should provide SVGA driver capabilities
but anyway good doc for VGA registers

VESA GDI driver
Sunday, August 5th, 2007 at 8:17:06am MDT 

  1. ; **********************************************************
  2.  
  3. ;       Name: VESA Graphic Device Interface
  4. ;       Autor: Peter Kleissner
  5. ;       Version: 1.00
  6. ;       Date: 04.08.2007 21:52
  7. ;       last Update: 04.08.2007 21:52
  8. ;       see document: ToasterOS.pdf
  9.  
  10. ; **********************************************************
  11.  
  12. [BITS 32]
  13. CPU 386
  14.  
  15.  
  16. %define Type_System
  17. %include "interface.asm"
  18.  
  19.  
  20. org VESA_GDI
  21.  
  22.  
  23.  
  24. ; VGA, SVGA, VESA Interface port registers
  25. ;
  26. ;  Attribute Controller Registers
  27. ; 
  28. ;     Index/Data Register               3C0h   [Write]
  29. ;     Data Register                     3C1h   [Read]
  30. ; 
  31. ;        Indexes of the Attribute Controller Register
  32. ;           Palette Registers                   00h - 0Fh
  33. ;           Attribute Mode Control Register     10h
  34. ;           Overscan Color Register             11h
  35. ;           Color Plane Enable Register         12h
  36. ;           Horizontal Pixel Panning Register   13h
  37. ;           Color Select Register               14h
  38. ;           Miscellanenous                      16h            [undocumented, na]
  39. ;
  40. ;  Miscellaneous Registers
  41. ; 
  42. ;     Miscellaneous Output Register     3C2h   [Write]
  43. ;     Miscellaneous Output Register     3CCh   [Read]
  44. ;     Input Status 0 Register           3C2h   [Read]
  45. ;     Video Subsystem Enable            3C3h   (46E8h)
  46. ;
  47. ;  Sequencer Registers
  48. ; 
  49. ;     TS Index Register                 3C4h   [EGA, Write]
  50. ;     TS Data Register                  3C5h   [EGA, Write]
  51. ;     
  52. ;     Sequence Index Register           3C4h   [VGA]
  53. ;     Sequence Data Register            3C5h   [VGA]
  54. ;
  55. ;  Digital-Analog Converter Registers
  56. ; 
  57. ;     PEL Mask Register                 3C6h   [MCGA=0FFh, VGA]
  58. ;     DAC State Register                3C7h   [Read]
  59. ;     PEL Address Register              3C7h   [Write]
  60. ;     PEL Address Register              3C8h   [Write-Mode]
  61. ;     PEL Data Register                 3C9h
  62. ;
  63. ;  Graphics Device Controller Position Registers
  64. ; 
  65. ;     Feature Control Register          3CAh   [Read]
  66. ;     Graphics 2 Position Register      3CAh   [Write]
  67. ;     Segment Select Register           3CBh
  68. ;     Graphics 1 Position Register      3CCh   [Write]
  69. ;     Select Segment Register           3CDh
  70. ;
  71. ;  Graphics Device Controller Registers
  72. ; 
  73. ;     Index Register                    3CEh   [EGA, Write]
  74. ;     Data Register                     3CFh   [EGA, Write]
  75. ;     Address/Index Register            3CEh   [VGA]
  76. ;     Graphics Register                 3CFh   [VGA, unused, undocumented]
  77. ;
  78. ;  Clear Flip/Flop Registers (for Port 3C2h)
  79. ; 
  80. ;     EGA/VGA mono Feature Control Register    3BAh
  81. ;     VGA graphics Feature Control Register    3DAh
  82.  
  83.  
  84.  
  85.  
  86. ; VBE Interface port registers [bochs, qemu]
  87. ;   VBE Display Interface I/O Port Index     1CEh
  88. ;   VBE Display Interface I/O Port Data      1CFh
  89. ;   
  90. ;   Indexes:
  91. ;   
  92. ;     VBE Display Index Idendification      0
  93. ;     VBE Display Index X resolution        1
  94. ;     VBE Display Index Y resolution        2
  95. ;     VBE Display Index Bits per Pixel      3
  96. ;     VBE Display Index Enable              4
  97. ;     VBE Display Index Bank                5
  98. ;     VBE Display Index Virtual Width       6
  99. ;     VBE Display Index Virtual Height      7
  100. ;     VBE Display Index X Offset            8
  101. ;     VBE Display Index Y Offset            9
  102. ;   
  103. ;   Data Values:
  104. ;   
  105. ;     VBE Display Index Disabled            0
  106. ;     VBE Display Index Enabled             1
  107. ;     VBE Display Index Get Capabilities    2
  108. ;     VBE Display Index 8 Bit Digital-Analog-Converter       20h
  109. ;     VBE Display Index Linear Frame Buffer Enabled          40h
  110. ;     VBE Display Index No Clear Memory                      80h
  111.  
  112.  
  113.  
  114.  
  115.  
  116.  
  117.  
  118.  
  119.  
  120.  
  121.  
  122.  
  123.  
  124. ; *************************************************************
  125. ;   Function: Write Index/Value to Attribute Control Register
  126. ;   
  127. ;   Input:     
  128. ;            al    Index
  129. ;            ah    Data
  130. ; *************************************************************
  131.  
  132. Send_Attribute_Control_Register:
  133.  
  134. ; clear flip/flop [for both Text Mode and graphics Mode]
  135. mov bl,al
  136. mov dx,3BAh
  137. in al,dx
  138. mov dx,3DAh
  139. in al,dx
  140. mov al,bl
  141.  
  142. ; send the Index
  143. mov al,bl
  144. mov dx,3C0h
  145. out dx,al
  146.  
  147. ; send the Data
  148. mov al,ah
  149. out dx,al
  150.  
  151. ret
  152.  
  153.  
  154.  
  155.  
  156.  
  157. ; *************************************************************
  158. ;   Function: Write Value to Miscellaneous Output Register
  159. ;   
  160. ;   Input:
  161. ;            al    Value
  162. ; *************************************************************
  163.  
  164. Send_Miscellaneous_Output_Register:
  165.  
  166. ; send the Data
  167. mov dx,3C2h
  168. out dx,al
  169.  
  170. ret
  171.  
  172.  
  173.  
  174.  
  175.  
  176. ; *************************************************************
  177. ;   Function: Write Index/Value to Sequencer Register
  178. ;   
  179. ;   Input:
  180. ;            al    Index
  181. ;            ah    Data
  182. ; *************************************************************
  183.  
  184. Send_Sequencer_Register:
  185.  
  186. ; if Index = 1 assume EGA (whyever)
  187. cmp al,1
  188. jne Send_Sequencer_Register_1
  189.  
  190. ; send something
  191. mov bl,ah
  192. mov ax,0100h
  193. mov dx,3C4h
  194. out dx,ax
  195.  
  196. ; send the Index
  197. mov al,1
  198. out dx,al
  199.  
  200. ; send the Data
  201. mov al,bl
  202. inc dx
  203. out dx,al
  204. dec dx
  205.  
  206. ; send something else
  207. mov ax,0300h
  208. out dx,ax
  209.  
  210. ret
  211.  
  212. Send_Sequencer_Register_1:
  213.  
  214. ; send the Index
  215. mov dx,3C4h
  216. out dx,al
  217.  
  218. ; send the Data
  219. mov al,ah
  220. inc dx
  221. out dx,ah
  222.  
  223. ret
  224.  
  225.  
  226.  
  227.  
  228.  
  229. ; *************************************************************
  230. ;   Function: Write Value to DAC Mask Register
  231. ;   
  232. ;   Input:
  233. ;            al    Value
  234. ; *************************************************************
  235.  
  236. Send_DAC_Mask_Register:
  237.  
  238. ; send the Data
  239. mov dx,3C6h
  240. out dx,al
  241.  
  242. ret
  243.  
  244.  
  245.  
  246.  
  247.  
  248. ; *************************************************************
  249. ;   Function: Write Index/Value to Graphics Controller Register
  250. ;   
  251. ;   Input:
  252. ;            al    Index
  253. ;            ah    Data
  254. ; *************************************************************
  255.  
  256. Send_Graphics_Controller_Register:
  257.  
  258. ; send the Index
  259. mov dx,3CEh
  260. out dx,al
  261.  
  262. ; send the Data
  263. mov al,ah
  264. inc dx
  265. out dx,al
  266.  
  267. ret
  268.  
  269.  
  270.  
  271.  
  272.  
  273. ; *************************************************************
  274. ;   Function: Write Index/Value to CRTC Controller
  275. ;   
  276. ;   Input:
  277. ;            al    Index
  278. ;            ah    Data
  279. ; *************************************************************
  280.  
  281. Send_CRTC_Controller:
  282.  
  283. ; send the Index
  284. mov dx,3D4h
  285. out dx,al
  286.  
  287. ; send the Data
  288. mov al,ah
  289. inc dx
  290. out dx,al
  291.  
  292. ret
  293.  
  294.  
  295.  
  296.  
  297.  
  298. ; *************************************************************
  299. ;   Function: VBE Port I/O write
  300. ;   
  301. ;   Input:
  302. ;            al    Index
  303. ;            ah    Data
  304. ; *************************************************************
  305.  
  306. Write_VBE_Port:
  307.  
  308. ; write the Index
  309. mov dx,1CEh
  310. out dx,al
  311.  
  312. ; write the Data
  313. mov al,ah
  314. inc dx
  315. out dx,al
  316.  
  317. ret

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