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asyvec.s
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Upload User: hepax88
Upload Date: 2007-01-03
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Code Size: 3k
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TCP/IP Stack

Development Platform:

Visual C++

asyvec.s：Code Content
  1. ; ASY (8250/16550A "com" port) interrupt hooks
  2. ; Copyright 1991 Phil Karn, KA9Q
  4. include asmglobal.h
  5. extrn doret:proc,asyint:far,eoi:proc,fpint:far
  7. .DATA
  8. extrn Sssave:word
  9. extrn Spsave:word
  10. extrn Stktop
  12. .CODE
  13. dbase dw @Data
  15. ; asy0vec - asynch channel 0 interrupt handler
  16. public asy0vec
  17. label asy0vec far
  18. cld
  19. push ds ; save on user stack
  20. mov ds,cs:dbase ; establish interrupt data segment
  22. mov Sssave,ss ; stash user stack context
  23. mov Spsave,sp
  25. mov ss,cs:dbase
  26. lea sp,Stktop
  28. PUSHALL
  29. push es
  30. call eoi
  32. mov ax,0 ; arg for service routine
  33. push ax
  34. call asyint
  35. inc sp
  36. inc sp
  37. jmp doret
  39. ; asy1vec - asynch channel 1 interrupt handler
  40. public asy1vec
  41. label asy1vec far
  42. cld
  43. push ds ; save on user stack
  44. mov ds,cs:dbase ; establish interrupt data segment
  46. mov Sssave,ss ; stash user stack context
  47. mov Spsave,sp
  49. mov ss,cs:dbase
  50. lea sp,Stktop
  52. PUSHALL
  53. push es
  54. call eoi
  56. mov ax,1 ; arg for service routine
  57. push ax
  58. call asyint
  59. inc sp
  60. inc sp
  61. jmp doret
  63. ; asy2vec - asynch channel 2 interrupt handler
  64. public asy2vec
  65. label asy2vec far
  66. cld
  67. push ds ; save on user stack
  68. mov ds,cs:dbase ; establish interrupt data segment
  70. mov Sssave,ss ; stash user stack context
  71. mov Spsave,sp
  73. mov ss,cs:dbase
  74. lea sp,Stktop
  76. PUSHALL
  77. push es
  78. call eoi
  80. mov ax,2 ; arg for service routine
  81. push ax
  82. call asyint
  83. inc sp
  84. inc sp
  85. jmp doret
  87. ; asy3vec - asynch channel 3 interrupt handler
  88. public asy3vec
  89. label asy3vec far
  90. cld
  91. push ds ; save on user stack
  92. mov ds,cs:dbase ; establish interrupt data segment
  94. mov Sssave,ss ; stash user stack context
  95. mov Spsave,sp
  97. mov ss,cs:dbase
  98. lea sp,Stktop
  100. PUSHALL
  101. push es
  102. call eoi
  104. mov ax,3 ; arg for service routine
  105. push ax
  106. call asyint
  107. inc sp
  108. inc sp
  109. jmp doret
  111. ; asy4vec - asynch channel 4 interrupt handler
  112. public asy4vec
  113. label asy4vec far
  114. cld
  115. push ds ; save on user stack
  116. mov ds,cs:dbase ; establish interrupt data segment
  118. mov Sssave,ss ; stash user stack context
  119. mov Spsave,sp
  121. mov ss,cs:dbase
  122. lea sp,Stktop
  124. PUSHALL
  125. push es
  126. call eoi
  128. mov ax,4 ; arg for service routine
  129. push ax
  130. call asyint
  131. inc sp
  132. inc sp
  133. jmp doret
  135. ; asy5vec - asynch channel 5 interrupt handler
  136. public asy5vec
  137. label asy5vec far
  138. cld
  139. push ds ; save on user stack
  140. mov ds,cs:dbase ; establish interrupt data segment
  142. mov Sssave,ss ; stash user stack context
  143. mov Spsave,sp
  145. mov ss,cs:dbase
  146. lea sp,Stktop
  148. PUSHALL
  149. push es
  150. call eoi
  152. mov ax,5 ; arg for service routine
  153. push ax
  154. call asyint
  155. inc sp
  156. inc sp
  157. jmp doret
  159. ; fp0vec - Fourport channel 0 interrupt handler
  160. public fp0vec
  161. label fp0vec far
  162. cld
  163. push ds ; save on user stack
  164. mov ds,cs:dbase ; establish interrupt data segment
  166. mov Sssave,ss ; stash user stack context
  167. mov Spsave,sp
  169. mov ss,cs:dbase
  170. lea sp,Stktop
  172. PUSHALL
  173. push es
  174. call eoi
  176. mov ax,0 ; arg for service routine
  177. push ax
  178. call fpint
  179. inc sp
  180. inc sp
  181. jmp doret
  183. end