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1 ********************************************************************
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2 * sbc09 emulator
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3 *
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4 * $Id$
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5 *
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6 * Edt/Rev YYYY/MM/DD Modified by
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7 * Comment
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8 * ------------------------------------------------------------------
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9 * 1 2018/08/20 S. Kono
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10 * Emulatoe sbc09 on os9 lv2
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11
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12 nam Sbc09
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13 ttl Sbc09 emulator
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14
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15 ifp1
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16 use defsfile
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17 endc
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18
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19 * Module header definitions
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20 tylg set Prgrm+Objct
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21 atrv set ReEnt+rev
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22 rev set $00
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23 edition set 1
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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 org 0
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28 ioentry rmb $80
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29 filepath rmb 2
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30 parmptr rmb 2
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31 stdin rmb 1
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32 chksum rmb 1
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33 bcount rmb 1
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34 adr rmb 2
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35 work rmb 2
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36 readbuff rmb $100
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37 org $400
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38 emstart rmb $e000-.
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39 size equ .
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40
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41 name fcs /Sbc09/
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42 fcb edition
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43
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44 start
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45 clr <stdin
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46 stx <parmptr save parameter pointer
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47 stu <work save parameter pointer
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48 lda #READ. read access mode
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49 os9 I$Open open file
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50 bcs L0049 branch if error
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51 sta <filepath else save path to file
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52 stx <parmptr and updated parm pointer
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53 L001F lda <filepath get path
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54 leax readbuff,u point X to read buffer
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55 ldy #200 read up to 200 bytes
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56 os9 I$ReadLn read it!
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57 bcs L0035 branch if error
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58 bsr srecords
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59 bra L001F else exit
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60 L0035 cmpb #E$EOF did we get an EOF error?
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61 * bne L0049 exit if not
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62 lda <filepath else get path
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63 os9 I$Close and close it
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64 bcs L0049 branch if error
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65 * ldx <parmptr get param pointer
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66 * lda ,x get char
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67 * cmpa #C$CR end of command line?
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68 * bne start branch if not
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69
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70 copytbl
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71 lda #$17 lbra
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72 sta $e400
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73 leax Exit,pcr
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74 leax -$e403,x
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75 stx $e401
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76 leax iotbl,pcr
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77 leay iotblend,pcr
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78 pshs x,y
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79 ldy #(iotblend-iotbl)
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80 l1 ldb #$7e * JMP
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81 stb ,u+
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82 ldd ,x++
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83 addb 1,s
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84 adca ,s
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85 std ,u++
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86 cmpx 2,s
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87 ble l1
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86
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88 puls x,y
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89 jmp $400
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90
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91 Exit clrb
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92 os9 F$Exit
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93
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94 iotbl
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95 fdb getchar-iotbl ; 0
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96 fdb putchar-iotbl ; 3
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97 fdb getline-iotbl ; 6
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98 fdb putline-iotbl ; 9
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99 fdb putcr-iotbl ; $C
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100 fdb getpoll-iotbl ; $F
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101 fdb xopenin-iotbl ; $12
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102 fdb xopenout-iotbl ; $15
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103 fdb xabortin-iotbl ; $18
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104 fdb xclosein-iotbl ; $1B
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105 fdb xcloseout-iotbl ; $21
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106 fdb delay-iotbl ; $24
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107 fdb noecho-iotbl ; $27
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108 iotblend
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109
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110 L0049
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111 err ldb #1
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112 bra Exit
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113
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114 srecords
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115 leax readbuff,u
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116 clr <chksum
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117 sline lda ,x+
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118 cmpa #'S'
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119 bne slast
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120 lda ,x+
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121 cmpa #'1'
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122 bne slast
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123 bsr gthex2
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124 subb #3
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125 stb <bcount
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126 bsr gthex2
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127 stb <adr
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128 bsr gthex2
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129 stb <adr+1
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130 lda <bcount
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131 ldy <adr
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132 sbyte bsr gthex2
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133 stb ,y+
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134 deca
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135 bgt sbyte
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136 slast
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137 bsr gthex2
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138 lda <chksum
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139 cmpa #$ff
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140 bne err1
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141 err1
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142 rts
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143
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144 gthex4 pshs d
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145 bsr gthex2
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146 stb ,s
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147 bsr gthex2
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148 stb 1,s
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149 puls d,pc
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150
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151 gthex2 pshs b
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152 bsr gthex1
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153 aslb
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154 aslb
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155 aslb
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156 aslb
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157 stb ,s
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158 bsr gthex1
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159 addb ,s
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160 stb ,s
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161 addb <chksum
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162 stb <chksum
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163 puls b,pc
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164
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165 gthex1 ldb ,x+
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166 subb #'0'
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167 blo rgethex1
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168 cmpb #9
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169 bls rgethex1
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170 subb #7
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171 rgethex1
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172 rts
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173
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174 putchar * Output one character in B register.
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175 PSHS X,Y
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176 BRA OUTCH1
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177 getchar * Input one character into B register.
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178 PSHS A,B,X,Y
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179 GETCH0
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180 LDA #0
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181 LEAX 1,S
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182 LDY #1
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183 OS9 I$Read
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184 BCS GETCH0
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185 PULS A,B,X,Y,PC
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186 putcr * Output a newline.
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187 LDB #C$CR
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188 bsr putchar
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189 LDB #C$LF
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190 PSHS X,Y
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191 OUTCH1 PSHS A,B
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192 LEAX 1,S
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193 LDA #1
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194 LDY #1
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195 OS9 I$Write
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196 PULS A,B,X,Y,PC
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197 getpoll
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198 PSHS X,Y,D
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199 LDA #0
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200 LDB #SS.Ready
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201 OS9 I$GetStt
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202 CMPB #$F6 Not Ready
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203 BNE RSENSE
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204 CLRB
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205 PULS X,Y,D,PC
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206 RSENSE
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207 ORCC #1 set carry to indicate ready
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208 RNSENSE
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209 PULS X,Y,D,PC
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210
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211 getline * Input line at address in X, length in B.
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212 PSHS A,B,X,Y
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213 GETLN0
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214 CLRA
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215 TFR D,Y
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216 LDA <stdin
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217 OS9 I$ReadLn
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218 BCS GETLN0
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219 LEAY -1,Y
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220 TFR Y,D
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221 * LDA D,X
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222 * CMPA #C$CR
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223 * BNE GETLN1
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224 * LEAY -1,Y
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225 GETLN1 STY ,S
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226 PULS A,B,X,Y,PC
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227 putline * Output string at address in X, length in B.
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228 PSHS A,B,X,Y
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229 CLRA
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230 TFR D,Y
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231 LDA <stdin
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232 OS9 I$WritLn
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233 PULS A,B,X,Y,PC
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234 xopenin
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235 xopenout
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236 xabortin
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237 xclosein
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238 xcloseout
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239 RTS
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240
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241 noecho LDA <stdin
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242 CLRB
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243 LDX <work
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244 leax readbuff,X
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245 OS9 I$GetStt
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246 bcs err2
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247 CLR IT.EKO,X
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248 CLRB
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249 OS9 I$SetStt
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250 err2
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251 RTS
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252
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253 delay PSHS D,X * address **$21**
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254 * On input the D register contains the number of timer
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255 * ticks to wait. Each timer tick is 20ms
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256 TFR D,X
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257 OS9 F$Sleep
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258 PULS D,X,PC
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259
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260
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261
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262 emod
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263 eom equ *
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264 end
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