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annotate level1/cmds/go51.asm @ 880:67178d0593da

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Made more comments
author boisy
date Fri, 17 Jan 2003 04:46:24 +0000
parents b19b5d02a2e1
children c155aac72190
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ce8dbdbb3ca2 The Go51 module for 51x24 display
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1 ********************************************************************
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2 * go51 - The 51 column by 24 line video display
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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 * 1 From Dragon OS-9 Level One VR 01.02.00
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9
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10 nam go51
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11 ttl The 51 column by 24 line video display
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12
ce8dbdbb3ca2 The Go51 module for 51x24 display
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13 * Disassembled 02/07/06 21:10:42 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 endc
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18
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19 tylg set Prgrm+Objct
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20 atrv set ReEnt+rev
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21 rev set $01
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22 edition set 1
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23
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24 mod eom,name,tylg,atrv,start,size
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25
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26 ioptr rmb 2
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27 drvrptr rmb 2
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28 drvrsiz rmb 2
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29 OptBuf rmb 32
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30 size equ .
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31
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32 name fcs /go51/
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33 fcb edition
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34
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35 IOMod fcs /KBVDIO/
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36 IOModL equ *-IOMod
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37 Driver fcs /drvr51/
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38 Desc fcs /term/
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39
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40 start leax >IOMod,pcr point to I/O module
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41 lbsr DoLink link to it
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42 lbcs Bye branch if error
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43 stx ioptr,u save ptr to module
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44 lbsr DoUnlink unlink it
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45 leax >Driver,pcr point to driver
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46 lbsr DoLink link to it
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47 lbcs Bye branch if error
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48 stx drvrptr,u save ptr to driver
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49 ldd M$Size,x get module size
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50 std drvrsiz,u save driver size
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51 pshs u,cc
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52 orcc #IntMasks mask interrupts
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53 ldx >D.AltIRQ
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54 stx >D.IRQ swap irq vector
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55 ldy ioptr,u
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56 ldx drvrsiz,u get driver size
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57 ldu drvrptr,u get driver pointer
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58 L0054 lda ,u+
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59 sta ,y+
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60 leax -$01,x
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61 bne L0054
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62 ldx #$FF00
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63 lda $01,x
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64 ora #$30
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65 anda #$F7
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66 sta $01,x
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67 lda $03,x
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68 anda #$F6
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69 ora #$30
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70 sta $03,x
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71 ldx #$FF20
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72 lda $03,x
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73 ora #$38
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74 sta $03,x
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75 puls u,cc
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76 ldx drvrptr,u get pointer to driver module
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77 lbsr DoUnlink unlink it
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78 ldx ioptr,u get io mod pointer
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79 ldd M$Name,x get offset to I/O module name
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80 leax d,x point X to name
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81 leay >IOMod,pcr
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82 ldb #IOModL
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83 L008B lda ,y+
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84 sta ,x+
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85 decb
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86 bne L008B
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87 lda #$01 standard output
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88 ldb #SS.Opt option getstat
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89 leax OptBuf,u point to buffer
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90 os9 I$GetStt get status
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91 bcs Bye branch if error
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92 clr (PD.UPC-PD.OPT),x
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93 lda #24
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94 sta (PD.PAG-PD.OPT),x
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95 lda #$01
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96 ldb #SS.Opt
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97 os9 I$SetStt
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98 bcs Bye
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99 leax >Desc,pcr
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100 lda #Devic+Objct
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101 pshs u
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102 os9 F$Link
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103 tfr u,x
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104 puls u
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105 bcs Bye
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106 clr <IT.UPC,x clear uppercase flag
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107 lda #24 new screen has 24 lines
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108 sta <IT.PAG,x save it
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109 bsr DoUnlink
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110 clrb
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111 Bye os9 F$Exit
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112
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113 DoLink pshs u
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114 lda #Drivr+Objct
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115 os9 F$Link
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116 tfr u,x
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117 puls pc,u
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118
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119 DoUnlink pshs u
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120 tfr x,u
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121 os9 F$UnLink
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122 puls pc,u
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123
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124 emod
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125 eom equ *
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126 end