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1 nam CCHDisk
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2 ttl Tandy hard disk driver
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3
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4 * Disassembled 98/08/23 17:28:39 by Disasm v1.6 (C) 1988 by RML
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5
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6 ifp1
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7 use defsfile
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8 use rbfdefs
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9 endc
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10
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11 tylg set Drivr+Objct
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12 atrv set ReEnt+rev
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13 rev set $01
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14 edition set $04
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15
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16 mod eom,name,tylg,atrv,start,size
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17
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18 u0000 rmb 8
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19 u0008 rmb 7
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20 u000F rmb 91
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21 u006A rmb 61
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22 u00A7 rmb 2
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23 u00A9 rmb 1
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24 u00AA rmb 1
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25 u00AB rmb 2
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26 u00AD rmb 2
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27 u00AF rmb 1
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28 u00B0 rmb 1
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29 u00B1 rmb 1
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30 u00B2 rmb 1
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31 u00B3 rmb 1
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32 u00B4 rmb 1
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33 u00B5 rmb 1
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34 u00B6 rmb 1
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35 u00B7 rmb 1
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36 u00B8 rmb 1
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37 u00B9 rmb 1
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38 u00BA rmb 1
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39 u00BB rmb 1
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40 u00BC rmb 2
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41 u00BE rmb 1
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42 u00BF rmb 2
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43 u00C1 rmb 2
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44 size equ .
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45 fcb $FF
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46
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47 name fcs /CCHDisk/
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48 fcb edition
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49
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50 start lbra Init
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51 lbra Read
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52 lbra Write
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53 lbra GetStat
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54 lbra SetStat
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55 lbra Term
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56
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57 * Init
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58 *
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59 * Entry:
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60 * Y = address of device descriptor
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61 * U = address of device memory area
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62 *
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63 * Exit:
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64 * CC = carry set on error
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65 * B = error code
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66 *
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67 Init lbsr L04D4
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68 lda >$FF51
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69 cmpa #$08
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70 beq L0037
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71 comb
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72 ldb #E$NotRdy
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73 bra L0083
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74 L0037 lbsr L04C0
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75 bcs L0083
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76 ldd #$FFFF
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77 std >u00A9,u
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78 std >u00A7,u
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79 leax <$25,y
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80 ldd ,x++
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81 sta >u00B3,u
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82 stb >u00BE,u
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83 ldd ,x++
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84 std >u00BF,u
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85 ldd ,x++
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86 std >u00C1,u
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87 lda ,x
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88 sta >u00B2,u
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89 lda #$04
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90 leay u000F,u
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91 ldb #$FF
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92 L006C stb ,y
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93 stb <$15,y
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94 leay <$26,y
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95 deca
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96 bne L006C
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97 ldd #256
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98 pshs u
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99 os9 F$SRqMem
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100 tfr u,x
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101 puls u
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102 L0083 bcs L00C7
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103 stx >u00AB,u
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104 leax >$0100,x
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105 stx >u00AD,u
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106 bra L00C6
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107
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108 * Term
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109 *
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110 * Entry:
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111 * U = address of device memory area
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112 *
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113 * Exit:
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114 * CC = carry set on error
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115 * B = error code
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116 *
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117 Term pshs u
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118 ldu >u00AB,u
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119 ldd #256
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120 os9 F$SRtMem
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121 puls u
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122
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123 * GetStat
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124 *
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125 * Entry:
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126 * A = function code
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127 * Y = address of path descriptor
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128 * U = address of device memory area
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129 *
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130 * Exit:
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131 * CC = carry set on error
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132 * B = error code
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133 *
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134 GetStat clrb
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135 rts
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136
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137 * Read
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138 *
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139 * Entry:
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140 * B = MSB of the disk's LSN
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141 * X = LSB of the disk's LSN
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142 * Y = address of path descriptor
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143 * U = address of device memory area
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144 *
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145 * Exit:
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146 * CC = carry set on error
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147 * B = error code
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148 *
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149 Read lbsr L04D4
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150 cmpx #$0000
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151 bne L00CB
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152 tstb
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153 bne L00CB
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154 bsr L00D1
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155 bcs L00C7
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156 ldx $08,y
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157 pshs y,x
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158 ldy >u00A7,u
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159 ldb #$14
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160 L00BD lda b,x
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161 sta b,y
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162 decb
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163 bpl L00BD
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164 puls y,x
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165 L00C6 clrb
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166 L00C7 lbsr L04E1
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167 rts
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168 L00CB bsr L00D1
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169 bcs L00C7
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170 bra L00C6
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171 L00D1 lbsr L033F
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172 bcs L00E3
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173 ldx $08,y
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174 lda #$02
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175 sta >u00B9,u
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176 lda #$20
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177 lbsr L028C
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178 L00E3 rts
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179
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180 * Write
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181 *
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182 * Entry:
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183 * B = MSB of the disk's LSN
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184 * X = LSB of the disk's LSN
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185 * Y = address of path descriptor
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186 * U = address of device memory area
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187 *
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188 * Exit:
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189 * CC = carry set on error
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190 * B = error code
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191 *
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192 Write lbsr L04D4
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193 bsr L014A
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194 bcs L00C7
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195 pshs x,b
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196 bsr L0100
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197 puls x,b
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198 bcs L00C7
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199 tst <$28,y
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200 bne L00C6
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201 bsr L0113
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202 bcc L00C6
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203 ldb <$00F5
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204 bra L00C7
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205 L0100 lbsr L033F
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206 bcs L0112
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207 lda #$03
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208 sta >u00B9,u
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209 lda #$30
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210 ldx $08,y
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211 lbsr L028C
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212 L0112 rts
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213 L0113 pshs x,b,a
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214 ldx $08,y
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215 pshs x
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216 ldx >u00AB,u
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217 stx $08,y
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218 ldx $04,s
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219 bsr L00D1
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220 puls x
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221 stx $08,y
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222 bcs L0148
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223 lda #$20
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224 pshs u,y,a
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225 ldy >u00AB,u
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226 tfr x,u
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227 L0134 ldx ,u
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228 cmpx ,y
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229 bne L0144
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230 leau u0008,u
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231 leay $08,y
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232 dec ,s
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233 bne L0134
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234 bra L0146
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235 L0144 orcc #Carry
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236 L0146 puls u,y,a
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237 L0148 puls pc,x,b,a
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238 L014A pshs b
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239 ldb >$FF50
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240 beq L0179
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241 lda <$21,y
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242 bne L015C
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243 andb #$80
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244 bne L0174
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245 bra L0179
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246 L015C cmpa #$01
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247 bne L0166
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248 andb #$40
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249 bne L0174
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250 bra L0179
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251 L0166 cmpa #$02
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252 bne L0170
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253 andb #$20
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254 bne L0174
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255 bra L0179
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256 L0170 andb #$10
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257 beq L0179
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258 L0174 comb
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259 ldb #E$WP
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260 stb ,s
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261 L0179 puls pc,b
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262
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263 * SetStat
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264 *
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265 * Entry:
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266 * A = function code
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267 * Y = address of path descriptor
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268 * U = address of device memory area
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269 *
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270 * Exit:
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271 * CC = carry set on error
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272 * B = error code
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273 *
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274 SetStat lbsr L04D4
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275 lbsr L0460
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276 ldx PD.RGS,y
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277 ldb R$B,x
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278 cmpb #SS.Reset
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279 bne L018E
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280 lbsr L04A5
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281 bra L01A1
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282 L018E cmpb #SS.WTrk
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283 bne L0196
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284 bsr L01B5
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285 bra L01A1
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286 L0196 cmpb #SS.SQD
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287 bne L019E
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288 bsr L01A8
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289 bra L01A1
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290 L019E comb
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291 ldb #E$UnkSvc
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292 L01A1 lbcs L00C7
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293 lbra L00C6
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294
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295 L01A8 ldd <$25,y
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296 exg a,b
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297 std >u00B6,u
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298 lbsr L0496
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299 rts
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300
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301 L01B5 ldd $8,x
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302 cmpd #$0000
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303 bne L01C3
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304 ldd $6,x
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305 cmpa #$00
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306 beq L01C5
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307 L01C3 clrb
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308 rts
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309 L01C5 pshs u,y,x
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310 clr >u00AF,u
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311 clr >u00B0,u
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312 clr >u00B1,u
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313 lda <$2A,y
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314 bsr L023D
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315 L01D8 lda <$2A,y
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316 sta >u00B4,u
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317 lda >u00B2,u
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318 sta >u00B5,u
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319 lda >u00B8,u
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320 anda #$F8
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321 sta >u00B8,u
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322 lda >u00B1,u
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323 ora >u00B8,u
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324 sta >u00B8,u
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325 ldd >u00AF,u
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326 exg a,b
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327 std >u00B6,u
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328 lda #$03
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329 sta >u00B9,u
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330 lda #$50
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331 ldx >u00AB,u
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332 bsr L028C
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333 bcs L023B
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334 lda >u00B1,u
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335 inca
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336 sta >u00B1,u
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337 cmpa <$27,y
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338 bcs L01D8
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339 clr >u00B1,u
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340 ldd >u00AF,u
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341 addd #$0001
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342 std >u00AF,u
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343 cmpd <$25,y
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344 bcs L01D8
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345 clrb
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346 L023B puls pc,u,y,x
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347 L023D pshs y,x,b,a
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348 ldb <$2D,y
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349 stb >u00BB,u
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350 sta >u00BA,u
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351 lsla
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352 ldx >u00AB,u
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353 leay a,x
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354 nega
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355 pshs y,x,b,a
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356 clra
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357 L0255 clr ,x
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358 sta $01,x
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359 inca
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360 cmpa >u00BA,u
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361 beq L0278
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362 ldb >u00BB,u
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363 lslb
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364 abx
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365 cmpx $04,s
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366 bcs L026E
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367 ldb ,s
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368 leax b,x
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369 L026E cmpx $02,s
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370 bne L0255
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371 leax $02,x
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372 stx $02,s
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373 bra L0255
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374 L0278 ldy $04,s
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375 lda #$00
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376 L027D cmpy >u00AD,u
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377 beq L0288
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378 sta ,y+
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379 bra L027D
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380 L0288 leas $06,s
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381 puls pc,y,x,b,a
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382 L028C pshs y,x,a
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383 leax >u00B3,u
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384 ldy #$FF59
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385 ldb #$06
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386 L0298 lda ,x+
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387 sta ,y+
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388 decb
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389 bne L0298
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390 lda ,s
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391 sta ,y
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392 ldy $03,s
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393 ldx $01,s
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394 lda >u00B9,u
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395 cmpa #$03
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396 beq L02C6
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397 bsr L02E1
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398 cmpa #$02
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399 beq L02BA
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400 L02B6 bsr L02F2
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401 puls pc,y,x,a
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402 L02BA bsr L02EB
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403 L02BC lda >$FF58
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404 sta ,x+
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405 decb
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406 bne L02BC
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407 bra L02B6
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408 L02C6 lda ,x+
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409 sta >$FF58
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410 decb
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411 bne L02C6
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412 bsr L02E1
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413 bra L02B6
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414 L02D2 lda >$FF5F
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415 pshs a
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416 lda >$FF5F
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417 cmpa ,s
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418 leas $01,s
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419 bne L02D2
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420 rts
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421 L02E1 pshs a
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422 L02E3 bsr L02D2
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423 anda #$80
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424 bne L02E3
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425 puls pc,a
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426 L02EB bsr L02D2
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427 bita #$08
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428 beq L02EB
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429 rts
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430 L02F2 bsr L02D2
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431 bita #$01
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432 bne L02FA
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433 clrb
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434 rts
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435 L02FA comb
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436 bita #$02
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437 beq L0302
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438 lbsr L04F1
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439 L0302 lda >$FF59
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440 bita #$80
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441 bne L0332
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442 bita #$40
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443 bne L031F
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444 bita #$10
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445 bne L0322
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446 bita #$04
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447 bne L0336
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448 bita #$02
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449 bne L0322
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450 bita #$01
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451 bne L0326
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452 clrb
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453 rts
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454 L031F ldb #E$CRC
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455 rts
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456 L0322 comb
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457 ldb #E$Seek
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458 rts
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459 L0326 comb
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460 ldb #E$Read
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461 rts
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462 comb
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463 ldb #E$Write
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464 rts
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465 L032E comb
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466 ldb #E$NotRdy
|
|
|
467 rts
|
|
|
468 L0332 comb
|
|
|
469 ldb #E$Unit
|
|
|
470 rts
|
|
|
471 L0336 lda >$FF5F
|
|
|
472 bita #$10
|
|
|
473 beq L0322
|
|
|
474 bra L032E
|
|
|
475 L033F lbsr L0460
|
|
|
476 bcs L0346
|
|
|
477 bsr L0347
|
|
|
478 L0346 rts
|
|
|
479 L0347 pshs y,x,b
|
|
|
480 lbsr L04C0
|
|
|
481 lbcs L0428
|
|
|
482 stx >u00BC,u
|
|
|
483 tstb
|
|
|
484 bne L0380
|
|
|
485 cmpx #$0000
|
|
|
486 bne L0380
|
|
|
487 leax >u00B4,u
|
|
|
488 ldd #$0001
|
|
|
489 sta $01,x
|
|
|
490 sta $02,x
|
|
|
491 sta $03,x
|
|
|
492 stb ,x
|
|
|
493 lda >u00B8,u
|
|
|
494 anda #$F8
|
|
|
495 sta >u00B8,u
|
|
|
496 tst >u00AA,u
|
|
|
497 lbne L040B
|
|
|
498 lbra L0427
|
|
|
499 L0380 ldy >u00A7,u
|
|
|
500 cmpb ,y
|
|
|
501 lbhi L042E
|
|
|
502 bcs L0393
|
|
|
503 cmpx $01,y
|
|
|
504 lbcc L042E
|
|
|
505 L0393 clr >u00B6,u
|
|
|
506 clr >u00B7,u
|
|
|
507 ldb ,s
|
|
|
508 ldx $01,s
|
|
|
509 ldy $03,s
|
|
|
510 tstb
|
|
|
511 bne L03B4
|
|
|
512 pshs x,b,a
|
|
|
513 lda <$2A,y
|
|
|
514 ldb <$27,y
|
|
|
515 mul
|
|
|
516 subd $02,s
|
|
|
517 puls x,b,a
|
|
|
518 bhi L03D5
|
|
|
519 L03B4 pshs u,y,x,b,a
|
|
|
520 lda >u00BE,u
|
|
|
521 ldy >u00BF,u
|
|
|
522 ldu >u00C1,u
|
|
|
523 bsr L0435
|
|
|
524 ldu $06,s
|
|
|
525 std >u00BC,u
|
|
|
526 tfr x,d
|
|
|
527 exg a,b
|
|
|
528 std >u00B6,u
|
|
|
529 puls u,y,x,b,a
|
|
|
530 L03D5 clra
|
|
|
531 ldb <$2A,y
|
|
|
532 beq L042E
|
|
|
533 pshs b,a
|
|
|
534 pshs a
|
|
|
535 ldd >u00BC,u
|
|
|
536 L03E3 subd $01,s
|
|
|
537 bcs L03EB
|
|
|
538 inc ,s
|
|
|
539 bra L03E3
|
|
|
540 L03EB addd $01,s
|
|
|
541 stb >u00B5,u
|
|
|
542 lda >u00B8,u
|
|
|
543 anda #$F8
|
|
|
544 ora ,s
|
|
|
545 sta >u00B8,u
|
|
|
546 leas $03,s
|
|
|
547 lda #$01
|
|
|
548 sta >u00B4,u
|
|
|
549 tst >u00AA,u
|
|
|
550 beq L0427
|
|
|
551 L040B clr >u00AA,u
|
|
|
552 ldy >u00A7,u
|
|
|
553 lda <$15,y
|
|
|
554 ldy $03,s
|
|
|
555 cmpa #$FF
|
|
|
556 bne L0423
|
|
|
557 lbsr L04A5
|
|
|
558 bra L0428
|
|
|
559 L0423 bsr L0496
|
|
|
560 bra L0428
|
|
|
561 L0427 clrb
|
|
|
562 L0428 bcc L042C
|
|
|
563 stb ,s
|
|
|
564 L042C puls pc,y,x,b
|
|
|
565 L042E puls b
|
|
|
566 comb
|
|
|
567 ldb #E$Sect
|
|
|
568 puls pc,y,x
|
|
|
569 L0435 pshs u,y,x,b,a
|
|
|
570 ldd $01,s
|
|
|
571 L0439 subd $04,s
|
|
|
572 bcc L0443
|
|
|
573 addd $04,s
|
|
|
574 andcc #^Carry
|
|
|
575 bra L0445
|
|
|
576 L0443 orcc #Carry
|
|
|
577 L0445 rol $03,s
|
|
|
578 rolb
|
|
|
579 rola
|
|
|
580 dec ,s
|
|
|
581 bne L0439
|
|
|
582 std ,s
|
|
|
583 andb $06,s
|
|
|
584 stb $02,s
|
|
|
585 ldb $07,s
|
|
|
586 beq L045E
|
|
|
587 L0457 lsr ,s
|
|
|
588 ror $01,s
|
|
|
589 decb
|
|
|
590 bne L0457
|
|
|
591 L045E puls pc,u,y,x,b,a
|
|
|
592 L0460 lda <$21,y
|
|
|
593 cmpa #$04
|
|
|
594 lbcc L0332
|
|
|
595 cmpa >u00A9,u
|
|
|
596 beq L0495
|
|
|
597 sta >u00A9,u
|
|
|
598 dec >u00AA,u
|
|
|
599 lsla
|
|
|
600 lsla
|
|
|
601 lsla
|
|
|
602 pshs a
|
|
|
603 lda >u00B8,u
|
|
|
604 anda #$E7
|
|
|
605 ora ,s
|
|
|
606 leas $01,s
|
|
|
607 sta >u00B8,u
|
|
|
608 pshs x
|
|
|
609 ldx <$1E,y
|
|
|
610 stx >u00A7,u
|
|
|
611 puls x
|
|
|
612 L0495 rts
|
|
|
613 L0496 clr >u00B9,u
|
|
|
614 lda <$22,y
|
|
|
615 anda #$0F
|
|
|
616 ora #$70
|
|
|
617 lbsr L028C
|
|
|
618 rts
|
|
|
619 L04A5 clr >u00B9,u
|
|
|
620 lda <$22,y
|
|
|
621 anda #$0F
|
|
|
622 ora #$10
|
|
|
623 lbsr L028C
|
|
|
624 bcs L04BF
|
|
|
625 ldx >u00A7,u
|
|
|
626 clr <$15,x
|
|
|
627 clr <$16,x
|
|
|
628 L04BF rts
|
|
|
629
|
|
|
630 L04C0 pshs b,a
|
|
|
631 clrb
|
|
|
632 L04C3 lda >$FF5F
|
|
|
633 bita #$40
|
|
|
634 bne L04D2
|
|
|
635 decb
|
|
|
636 bne L04C3
|
|
|
637 ldb #E$NotRdy
|
|
|
638 stb $01,s
|
|
|
639 comb
|
|
|
640 L04D2 puls pc,b,a
|
|
|
641
|
|
|
642 L04D4 dec <u006A
|
|
|
643 lda #$02
|
|
|
644 sta >MPI.Slct
|
|
|
645 lda #$08
|
|
|
646 L04DD sta >$FF51
|
|
|
647 rts
|
|
|
648
|
|
|
649 L04E1 pshs cc
|
|
|
650 lda #$00
|
|
|
651 sta >$FF51
|
|
|
652 lda #$03
|
|
|
653 sta >MPI.Slct
|
|
|
654 clr <u006A
|
|
|
655 puls pc,cc
|
|
|
656
|
|
|
657 L04F1 lda #$10
|
|
|
658 bra L04DD
|
|
|
659
|
|
|
660 emod
|
|
|
661 eom equ *
|
|
|
662 end
|
|
|
663
|
