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1 ********************************************************************
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2 * PRINTER - CoCo serial port printer driver
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3 *
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4 * $Id$
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5 *
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6 * Ed. Comments Who YY/MM/DD
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7 * ------------------------------------------------------------------
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8 * 10 Tandy/Microware original version
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9
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10 nam PRINTER
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11 ttl CoCo serial port printer driver
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12
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13 * Disassembled 98/08/23 17:32:06 by Disasm v1.6 (C) 1988 by RML
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14
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15 ifp1
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16 use defsfile
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17 use scfdefs
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18 endc
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19
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20 tylg set Drivr+Objct
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21 atrv set ReEnt+rev
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22 rev set $01
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23 edition set $0A
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24
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25 mod eom,name,tylg,atrv,start,size
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26
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27 u0000 rmb 29
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28 u001D rmb 1
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29 u001E rmb 1
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30 u001F rmb 1
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31 u0020 rmb 2
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32 u0022 rmb 1
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33 u0023 rmb 1
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34 u0024 rmb 2
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35 u0026 rmb 2
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36 u0028 rmb 1
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37 size equ .
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38 fcb $03
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39
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40 name fcs /PRINTER/
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41 fcb edition
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42
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43 L0016 fcb $04
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44 fcb $82
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45 fcb $01
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46 fcb $A2 "
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47 fcb $00
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48 fcb $CD M
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49 fcb $00
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50 fcb $63 c
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51 fcb $00
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52 fcb $2D -
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53 fcb $00
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54 fcb $13
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55 fcb $00
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56 fcb $05
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57
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58 start lbra Init
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59 lbra Read
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60 lbra Write
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61 lbra GetStat
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62 lbra SetStat
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63 lbra Term
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64
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65 * Init
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66 *
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67 * Entry:
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68 * Y = address of device descriptor
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69 * U = address of device memory area
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70 *
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71 * Exit:
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72 * CC = carry set on error
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73 * B = error code
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74 *
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75 Init pshs cc
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76 orcc #IntMasks
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77 ldx #PIA.U8
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78 clr $01,x
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79 ldd <IT.COL,y get column size
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80 std <u0022,u
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81 lda #$FE
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82 sta ,x
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83 lda #$36
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84 sta $01,x
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85 lda ,x
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86 ldd <IT.PAR,y get parity/baud
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87 lbsr L0155
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88 puls cc
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89 lbsr L0104
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90 lbcs L0100
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91
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92 * Term
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93 *
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94 * Entry:
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95 * U = address of device memory area
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96 *
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97 * Exit:
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98 * CC = carry set on error
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99 * B = error code
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100 *
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101 Term rts
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102
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103 L005F pshs a
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104 lda <$35,y
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105 anda #$0F
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106 cmpa #$07
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107 bcc L0076
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108 lsla
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109 leax <L0016,pcr
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110 ldd a,x
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111 std <u0024,u
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112 clrb
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113 puls pc,a
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114 L0076 ldb #E$BMode
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115 puls a
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116 L007A orcc #Carry
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117 rts
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118 L007D stb >PIA.U8
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119 L0080 pshs b,a
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120 ldd <u0024,u
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121 L0085 subd #$0001
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122 bne L0085
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123 puls pc,b,a
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124
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125 * Write
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126 *
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127 * Entry:
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128 * A = character to write
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129 * Y = address of path descriptor
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130 * U = address of device memory area
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131 *
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132 * Exit:
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133 * CC = carry set on error
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134 * B = error code
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135 *
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136 Write bsr L005F
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137 bcs L007A
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138 pshs b,a
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139 bsr L00CB
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140 puls b,a
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141 bcs L0100
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142 ldb #$09
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143 pshs b,cc
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144 orcc #IntMasks
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145 tst <u001E,u
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146 beq L00A5
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147 dec $01,s
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148 L00A5 andcc #^Carry
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149 L00A7 ldb #$02
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150 bcs L00AC
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151 clrb
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152 L00AC bsr L007D
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153 lsra
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154 dec $01,s
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155 bne L00A7
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156 ldb <u001D,u
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157 beq L00BC
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158 andb #$FE
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159 bsr L007D
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160 L00BC ldb #$02
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161 bsr L007D
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162 tst <u001F,u
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163 beq L00C9
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164 ldb #$02
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165 bsr L007D
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166 L00C9 puls pc,b,cc
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167 L00CB clra
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168 clrb
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169 std <u0026,u
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170 L00D0 ldd #$0303
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171 L00D3 bsr L0104
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172 bcs L00DE
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173 bsr L0080
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174 decb
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175 bne L00D3
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176 clrb
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177 rts
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178 L00DE bsr L0080
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179 deca
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180 bne L00D3
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181 pshs x
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182 ldx #$0001
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183 os9 F$Sleep
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184 puls x
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185 ldd <u0026,u
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186 addd #$0001
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187 std <u0026,u
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188 ldb <u0028,u
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189 beq L00D0
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190 cmpb <u0026,u
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191 bhi L00D0
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192 L0100 comb
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193 ldb #E$NotRdy
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194 rts
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195 L0104 pshs x,b,a
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196 ldb >PIA.U8+2
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197 lda >$FF69
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198 bpl L0126
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199 lda >PIA.U8+3
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200 bita #$01
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201 beq L0126
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202 bita #$80
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203 beq L0126
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204 orcc #Entire
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205 leax <L0126,pcr
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206 pshs x
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207 pshs u,y,x,dp,b,a,cc
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208 jmp [D.SvcIRQ]
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209 L0126 lsrb
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210 puls pc,x,b,a
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211
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212 * GetStat
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213 *
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214 * Entry:
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215 * A = function code
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216 * Y = address of path descriptor
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217 * U = address of device memory area
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218 *
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219 * Exit:
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220 * CC = carry set on error
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221 * B = error code
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222 *
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223 GetStat cmpa #SS.EOF
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224 bne L012F
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225 L012D clrb
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226 rts
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227 L012F ldx PD.RGS,y
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228 cmpa #SS.ScSiz
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229 beq L0140
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230 cmpa #SS.ComSt
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231 bne L0190
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232 ldd <u0020,u
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233 std R$Y,x
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234 bra L012D
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235 L0140 clra
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236 ldb <u0022,u
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237 std R$X,x
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238 ldb <u0023,u
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239 std R$Y,x
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240 bra L012D
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241
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242 * GetStat
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243 *
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244 * Entry:
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245 * A = function code
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246 * Y = address of path descriptor
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247 * U = address of device memory area
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248 *
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249 * Exit:
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250 * CC = carry set on error
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251 * B = error code
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252 *
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253 SetStat cmpa #SS.ComSt
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254 bne L0190
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255 ldx PD.RGS,y
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256 ldd R$Y,x
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257 L0155 std <u0020,u
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258 clra
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259 clrb
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260 std <u001D,u
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261 sta <u001F,u
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262 ldd <u0020,u
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263 tstb
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264 bpl L0169
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265 inc <u001F,u
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266 L0169 bitb #$40
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267 bne Read
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268 bitb #$20
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269 beq L0174
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270 inc <u001E,u
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271 L0174 bita #$20
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272 beq L0186
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273 bita #$80
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274 beq Read
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275 inc <u001D,u
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276 bita #$40
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277 bne L0186
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278 inc <u001D,u
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279 L0186 anda #$0F
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280 sta <u0028,u
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281 rts
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282
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283 * Read
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284 *
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285 * Entry:
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286 * Y = address of path descriptor
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287 * U = address of device memory area
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288 *
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289 * Exit:
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290 * A = character read
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291 * CC = carry set on error
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292 * B = error code
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293 *
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294 Read comb
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295 ldb <E$BMode
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296 rts
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297
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298 L0190 comb
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299 ldb #E$UnkSvc
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300 rts
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301
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302 emod
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303 eom equ *
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304 end
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305
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