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dcfprogs/Graphics/Stars/Old

This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.

Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.

Tape/disk: Home » Personal collection » Acorn hard disk » misc » misc2
Filename: dcfprogs/Graphics/Stars/Old
Read OK: ✔
File size: 0DA5 bytes
Load address: 0000
Exec address: 0000
Duplicates

There is 1 duplicate copy of this file in the archive:

File contents
   10 REM     Starfield EUG                        by Dominic Ford 1997
   20 :
   30 ONERRORGOTO70
   40 IFPAGE>&1D00THENA
   50 MODE2:HIMEM=&2CD0:VDU23,1,0;0;0;0;:PROCass:*LOAD TitData
   60 CALLstart
   70 END
   80 :
   90 DEFPROCass
  100 osword=&FFF1:osbyte=&FFF4:FORpass=0TO2STEP2:P%=&2CD0:[OPT pass
  110 .start LDA#12:LDX#(coli MOD 256):LDY#(coli DIV 256):JSRosword:INCcoli:LDAcoli:CMP#16:BNEstart:JSRon
  120 .program LDA#0:STAlinno:LDA#(text MOD 256):STA&74:LDA#(text DIV 256):STA&75:LDA#0:STApage:.pages JSRminc:JSRdopage:JSRwaic:JSRfade:INCpage:LDApage:CMP#3:BNEpages:JMPprogram
  130 .dopage LDA#0:STAline:.pageloop LDXlinno:LDAspace,X:STAlen:JSRwrite:INClinno:INCline:LDAline:CMP#3:BNEpageloop:LDXclock:LDA&E000,X:AND#7:BNEnotblack:LDA#1:.notblack STAofc:JSRwait:LDAofc:STAonc:STAflacyc+3:LDA#0:STAcycle:JMPmini
  140 .write LDXline:LDA#0:STA&70:STAxc:LDAaddress,X:STA&71:.newchar LDA#0:STAx:JSRreaddef:LDXlen:.newline SEI:LDA#0:STAy:LDA&70:STA&72:LDA&71:STA&73:JSRgetdata
  150 .next LSRbyte:BCCblank:LDAbts,X:STA&76:LDY#0:.loop LDA(&72),Y:EOR#&C0:STA(&72),Y:INY:CPY&76:BNEloop
  160 .blank LDA&72:CLC:ADC#&80:STA&72:LDA&73:ADC#2:STA&73:INCy:LDAy:CMP#8:BNEnext:INCx:LDA&70:CLC:ADCbts,X:STA&70:LDA&71:ADC#0:STA&71:LDAx:CMP#8:BNEnewline:CLI
  170 INCxc:LDAxc:CMPchars,X:BNEnewchar:LDA&74:CLC:ADC#10:STA&74:LDA&75:ADC#0:STA&75:RTS
  180 .readdef LDYxc:LDA(&74),Y:STAascii:LDA#&A:LDX#(ascii MOD 256):LDY#(ascii DIV 256):JMPosword
  190 .getdata LDY#8:LDXx:.getloop LDAascii,Y:ANDpower,X:CMPpower,X:ROLbyte:DEY:BNEgetloop:LDXlen:RTS
  200 .mini JSRminw:JSRminw:RTS:.minw LDAclock:CLC:ADC#&80:.waitloop CMPclock:BNEwaitloop:LDA#&91:LDX#0:JSRosbyte:CPY#32:BNEnoe:JSRoff:PLA:PLA:PLA:PLA:PLA:PLA:.noe RTS
  210 .minc JSRmini:RTS:.waic JSRwait:RTS:.wait JSRminw:JSRminw:JSRminw:JSRminw:RTS:.fade LDA#0:STAofc:JSRwait:LDA#7:STAonc:LDA#5:STAcycle:JSRmini
  220 .fade LDA#0:STAofc:JSRwait:LDA#7:STAonc:LDA#5:STAcycle:JSRmini
  230 LDA#0:STA&70:LDA#&30:STA&71:LDY#0:.clear LDA(&70),Y:AND#&3F:STA(&70),Y:INY:BNEclear:INC&71:LDA&71:CMP#&80:BNEclear:RTS
  240 .on SEI:LDA&204:STAvector:LDA&205:STAvector+1:LDA#(irq MOD 256):STA&204:LDA#(irq DIV 256):STA&205:CLI:RTS
  250 .off SEI:LDAvector:STA&204:LDAvector+1:STA&205:CLI:RTS
  260 .irq INCclock:LDAclock:AND#7:BNEirqend:TXA:PHA:TYA:PHA:JSRstars:JSRflash:PLA:TAY:PLA:TAX:.irqend JMP(vector)
  270 .flash LDXcycle:CPX#&FF:BEQendf:LDAflacyc,X:BEQoverf:STAcoli+1:LDA#8:STAcoli:LDA#12:LDX#(coli MOD 256):LDY#(coli DIV 256):JSRosword:INCcycle:.endf RTS:.overf LDA#&FF:STAcycle:RTS
  280 .stars INCb:LDAb:CMP#7:BCCnowrap:LDA#0:STAb:.nowrap CLC:ADC#1:STAcoli:LDA#7:STAcoli+1:LDA#12:LDX#(coli MOD 256):LDY#(coli DIV 256):JSRosword:LDAcoli:CLC:ADC#8:STAcoli:LDAonc:STAcoli+1
  290 LDA#12:LDX#(coli MOD 256):LDY#(coli DIV 256):JSRosword
  300 LDAc:STAcoli:LDA#0:STAcoli+1:LDA#12:LDX#(coli MOD 256):LDY#(coli DIV 256):JSRosword:LDAb:CLC:ADC#1:STAc:LDAcoli:CLC:ADC#8:STAcoli:LDAofc:STAcoli+1:LDA#12:LDX#(coli MOD 256):LDY#(coli DIV 256):JMPosword
  310 .text EQUS" Electron ":EQUS"   User   ":EQUS"Group     ":EQUS"  Issue:  ":EQUS"          ":EQUS"    31    ":EQUS"Press     ":EQUS"<SPACE> to":EQUS" continue "
  320 .space EQUB0:EQUB0:EQUB1:EQUB0:EQUB0:EQUB0:EQUB1:EQUB0:EQUB0:.address EQUB&3A:EQUB&4E:EQUB&62:.power EQUB128:EQUB64:EQUB32:EQUB16:EQUB8:EQUB4:EQUB2:EQUB1:.flacyc EQUB4:EQUB6:EQUB7:EQUB0:EQUB0:EQUB7:EQUB6:EQUB4:EQUB16:EQUB0
  330 .x EQUB0:.y EQUB0:.xc EQUB0:.len EQUB0:.byte EQUB0:.line EQUB0:.page EQUB0:.clock EQUB5:.vector EQUW0:.linno EQUB0:.bts EQUB8:EQUB16:.chars EQUB10:EQUB5:.ascii EQUB0:EQUD0:EQUD0:.b EQUB1:.c EQUB1:.coli EQUD0:EQUB0
  340 .ofc EQUB0:.onc EQUB7:.cycle EQUB&FF:]:NEXT:ENDPROC


D �     Starfield EUG                        by Dominic Ford 1997
 :
 ��DF@
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21 �2:�=&2CD0:�23,1,0;0;0;0;:�ass:*LOAD TitData
< �start
F �
P :
Z
 ��ass
d= osword=&FFF1:osbyte=&FFF4:�pass=0�2�2:P%=&2CD0:[OPT pass
nd .start LDA#12:LDX#(coli � 256):LDY#(coli � 256):JSRosword:INCcoli:LDAcoli:CMP#16:BNEstart:JSRon
x� .program LDA#0:STAlinno:LDA#(text � 256):STA&74:LDA#(text � 256):STA&75:LDA#0:STApage:.pages JSRminc:JSRdopage:JSRwaic:JSRfade:INCpage:LDApage:CMP#3:BNEpages:JMPprogram
�� .dopage LDA#0:STAline:.pageloop LDXlinno:LDAspace,X:STAlen:JSRwrite:INClinno:INCline:LDAline:CMP#3:BNEpageloop:LDXclock:LDA&E000,X:�#7:BNEnotblack:LDA#1:.notblack STAofc:JSRwait:LDAofc:STAonc:STAflacyc+3:LDA#0:STAcycle:JMPmini
�� .write LDXline:LDA#0:STA&70:STAxc:LDAaddress,X:STA&71:.newchar LDA#0:STAx:JSRreaddef:LDXlen:.newline SEI:LDA#0:STAy:LDA&70:STA&72:LDA&71:STA&73:JSRgetdata
�f .next LSRbyte:BCCblank:LDAbts,X:STA&76:LDY#0:.loop LDA(&72),Y:�#&C0:STA(&72),Y:INY:CPY&76:BNEloop
�� .blank LDA&72:CLC:ADC#&80:STA&72:LDA&73:ADC#2:STA&73:INCy:LDAy:CMP#8:BNEnext:INCx:LDA&70:CLC:ADCbts,X:STA&70:LDA&71:ADC#0:STA&71:LDAx:CMP#8:BNEnewline:CLI
�W INCxc:LDAxc:CMPchars,X:BNEnewchar:LDA&74:CLC:ADC#10:STA&74:LDA&75:ADC#0:STA&75:RTS
�\ .readdef LDYxc:LDA(&74),Y:STAascii:LDA#&A:LDX#(ascii � 256):LDY#(ascii � 256):JMPosword
�b .getdata LDY#8:LDXx:.getloop LDAascii,Y:�power,X:CMPpower,X:ROLbyte:DEY:BNEgetloop:LDXlen:RTS
Ȧ .mini JSRminw:JSRminw:RTS:.minw LDAclock:CLC:ADC#&80:.waitloop CMPclock:BNEwaitloop:LDA#&91:LDX#0:JSRosbyte:CPY#32:BNEnoe:JSRoff:PLA:PLA:PLA:PLA:PLA:PLA:.noe RTS
ґ .minc JSRmini:RTS:.waic JSRwait:RTS:.wait JSRminw:JSRminw:JSRminw:JSRminw:RTS:.fade LDA#0:STAofc:JSRwait:LDA#7:STAonc:LDA#5:STAcycle:JSRmini
�C .fade LDA#0:STAofc:JSRwait:LDA#7:STAonc:LDA#5:STAcycle:JSRmini
�y LDA#0:STA&70:LDA#&30:STA&71:LDY#0:.clear LDA(&70),Y:�#&3F:STA(&70),Y:INY:BNEclear:INC&71:LDA&71:CMP#&80:BNEclear:RTS
�j .on SEI:LDA&204:STAvector:LDA&205:STAvector+1:LDA#(irq � 256):STA&204:LDA#(irq � 256):STA&205:CLI:RTS
�; .off SEI:LDAvector:STA&204:LDAvector+1:STA&205:CLI:RTS
o .irq INCclock:LDAclock:�#7:BNEirqend:TXA:PHA:TYA:PHA:JSRstars:JSRflash:PLA:TAY:PLA:TAX:.irqend JMP(vector)
� .flash LDXcycle:CPX#&FF:BEQendf:LDAflacyc,X:BEQoverf:STAcoli+1:LDA#8:STAcoli:LDA#12:LDX#(coli � 256):LDY#(coli � 256):JSRosword:INCcycle:.endf RTS:.overf LDA#&FF:STAcycle:RTS
� .stars INCb:LDAb:CMP#7:BCCnowrap:LDA#0:STAb:.nowrap CLC:ADC#1:STAcoli:LDA#7:STAcoli+1:LDA#12:LDX#(coli � 256):LDY#(coli � 256):JSRosword:LDAcoli:CLC:ADC#8:STAcoli:LDAonc:STAcoli+1
"7 LDA#12:LDX#(coli � 256):LDY#(coli � 256):JSRosword
,� LDAc:STAcoli:LDA#0:STAcoli+1:LDA#12:LDX#(coli � 256):LDY#(coli � 256):JSRosword:LDAb:CLC:ADC#1:STAc:LDAcoli:CLC:ADC#8:STAcoli:LDAofc:STAcoli+1:LDA#12:LDX#(coli � 256):LDY#(coli � 256):JMPosword
6� .text EQUS" Electron ":EQUS"   User   ":EQUS"Group     ":EQUS"  Issue:  ":EQUS"          ":EQUS"    31    ":EQUS"Press     ":EQUS"<SPACE> to":EQUS" continue "
@� .space EQUB0:EQUB0:EQUB1:EQUB0:EQUB0:EQUB0:EQUB1:EQUB0:EQUB0:.address EQUB&3A:EQUB&4E:EQUB&62:.power EQUB128:EQUB64:EQUB32:EQUB16:EQUB8:EQUB4:EQUB2:EQUB1:.flacyc EQUB4:EQUB6:EQUB7:EQUB0:EQUB0:EQUB7:EQUB6:EQUB4:EQUB16:EQUB0
J� .x EQUB0:.y EQUB0:.xc EQUB0:.len EQUB0:.byte EQUB0:.line EQUB0:.page EQUB0:.clock EQUB5:.vector EQUW0:.linno EQUB0:.bts EQUB8:EQUB16:.chars EQUB10:EQUB5:.ascii EQUB0:EQUD0:EQUD0:.b EQUB1:.c EQUB1:.coli EQUD0:EQUB0
T/ .ofc EQUB0:.onc EQUB7:.cycle EQUB&FF:]:�:�
�
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00000010  69 65 6c 64 20 45 55 47  20 20 20 20 20 20 20 20  |ield EUG        |
00000020  20 20 20 20 20 20 20 20  20 20 20 20 20 20 20 20  |                |
00000030  62 79 20 44 6f 6d 69 6e  69 63 20 46 6f 72 64 20  |by Dominic Ford |
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00000da0  ed 3a e1 0d ff                                    |.:...|
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