Home » Personal collection » Acorn ADFS disks » Electron_User_Group » EUG_31.ADF » TITLE

TITLE

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 ADFS disks » Electron_User_Group » EUG_31.ADF
Filename: TITLE
Read OK:
File size: 0CF2 bytes
Load address: FFFF0E00
Exec address: FFFF802B
File contents
   10REM    Starfield EUG
   20REM by Dominic Ford 1997
   30:
   40ONERRORGOTO330
   50IFPAGE>&1D00THENA
   60MODE2:HIMEM=&2CD0:VDU23,1,0;0;0;0;
   70FORpass=0TO2STEP2:P%=&2CD0:[OPT pass:.start LDA#12:LDX#(coli MOD256):LDY#(coli DIV256):JSR&FFF1:INCcoli:LDAcoli:CMP#16:BNEstart:JSRon
   80.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
   90.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
  100.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
  110.next LSRbyte:BCCblank:LDAbts,X:STA&76:LDY#0:.loop LDA(&72),Y:EOR#&C0:STA(&72),Y:INY:CPY&76:BNEloop
  120.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
  130INCxc:LDAxc:CMPchars,X:BNEnewchar:LDA&74:CLC:ADC#10:STA&74:LDA&75:ADC#0:STA&75:RTS
  140.readdef LDYxc:LDA(&74),Y:STAascii:LDA#&A:LDX#(ascii MOD256):LDY#(ascii DIV256):JMP&FFF1
  150.getdata LDY#8:LDXx:.getloop LDAascii,Y:ANDpower,X:CMPpower,X:ROLbyte:DEY:BNEgetloop:LDXlen:RTS
  160.mini JSRminw:RTS:.minw LDA#0:STAclock+1:LDA#&F0:.waitloop CMPclock+1:BCSwaitloop:LDA#&91:LDX#0:JSR&FFF4:CPY#32:BNEnoe:JSRoff:PLA:PLA:PLA:PLA:PLA:PLA:.noe RTS
  170.minc JSRmini:RTS:.waic JSRwait:RTS:.wait JSRminw:JSRminw:RTS:.fade LDA#0:STAofc:JSRwait:LDA#7:STAonc:LDA#5:STAcycle:JSRmini
  180.fade LDA#0:STAofc:JSRwait:LDA#7:STAonc:LDA#5:STAcycle:JSRmini
  190LDA#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
  200.on SEI:LDA&204:STAvector:LDA&205:STAvector+1:LDA#(irq MOD 256):STA&204:LDA#(irq DIV 256):STA&205:CLI:RTS
  210.off SEI:LDAvector:STA&204:LDAvector+1:STA&205:CLI:RTS
  220.irq INCclock+1:INCclock:LDAclock:AND#7:BNEirqend:TXA:PHA:TYA:PHA:JSRstars:JSRflash:PLA:TAY:PLA:TAX:.irqend JMP(vector)
  230.flash LDXcycle:CPX#&FF:BEQendf:LDAflacyc,X:BEQoverf:STAcoli+1:LDA#8:STAcoli:LDA#12:LDX#(coli MOD256):LDY#(coli DIV256):JSR&FFF1:INCcycle:.endf RTS:.overf LDA#&FF:STAcycle:RTS
  240.stars INCb:LDAb:CMP#7:BCCnowrap:LDA#0:STAb:.nowrap CLC:ADC#1:STAcoli:LDA#7:STAcoli+1:LDA#12:LDX#(coli MOD256):LDY#(coli DIV256):JSR&FFF1:LDAcoli:CLC:ADC#8:STAcoli:LDAonc:STAcoli+1
  250LDA#12:LDX#(coli MOD256):LDY#(coli DIV256):JSR&FFF1
  260LDAc:STAcoli:LDA#0:STAcoli+1:LDA#12:LDX#(coli MOD256):LDY#(coli DIV256):JSR&FFF1:LDAb:CLC:ADC#1:STAc:LDAcoli:CLC:ADC#8:STAcoli:LDAofc:STAcoli+1:LDA#12:LDX#(coli MOD256):LDY#(coli DIV256):JMP&FFF1
  270.text EQUS" EUG31                        Press     <SPACE> to continue A         D Ford    Screen    "
  280.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
  290.x EQUB0:.y EQUB0:.xc EQUB0:.len EQUB0:.byte EQUB0:.line EQUB0:.page EQUB0:.clock EQUW5:.vector EQUW0:.linno EQUB0:.bts EQUB8:EQUB16:.chars EQUB10:EQUB5:.ascii EQUB0:EQUD0:EQUD0:.b EQUB1:.c EQUB1:.coli EQUD0:EQUB0
  300.ofc EQUB0:.onc EQUB7:.cycle EQUB&FF:]:NEXT
  310*LOAD TitData
  320CALLstart
  330CHAIN"MENU"

�    Starfield EUG
� by Dominic Ford 1997
:
(��DJA
2�>&1D00�A
<�2:�=&2CD0:�23,1,0;0;0;0;
F�pass=0�2�2:P%=&2CD0:[OPT pass:.start LDA#12:LDX#(coli �256):LDY#(coli �256):JSR&FFF1:INCcoli:LDAcoli:CMP#16:BNEstart:JSRon
P�.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
Z�.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
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�X.readdef LDYxc:LDA(&74),Y:STAascii:LDA#&A:LDX#(ascii �256):LDY#(ascii �256):JMP&FFF1
�a.getdata LDY#8:LDXx:.getloop LDAascii,Y:�power,X:CMPpower,X:ROLbyte:DEY:BNEgetloop:LDXlen:RTS
��.mini JSRminw:RTS:.minw LDA#0:STAclock+1:LDA#&F0:.waitloop CMPclock+1:BCSwaitloop:LDA#&91:LDX#0:JSR&FFF4:CPY#32:BNEnoe:JSRoff:PLA:PLA:PLA:PLA:PLA:PLA:.noe RTS
��.minc JSRmini:RTS:.waic JSRwait:RTS:.wait JSRminw:JSRminw:RTS:.fade LDA#0:STAofc:JSRwait:LDA#7:STAonc:LDA#5:STAcycle:JSRmini
�B.fade LDA#0:STAofc:JSRwait:LDA#7:STAonc:LDA#5:STAcycle:JSRmini
�xLDA#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
�i.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
�y.irq INCclock+1: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):JSR&FFF1: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):JSR&FFF1:LDAcoli:CLC:ADC#8:STAcoli:LDAonc:STAcoli+1
�3LDA#12:LDX#(coli �256):LDY#(coli �256):JSR&FFF1
�LDAc:STAcoli:LDA#0:STAcoli+1:LDA#12:LDX#(coli �256):LDY#(coli �256):JSR&FFF1:LDAb:CLC:ADC#1:STAc:LDAcoli:CLC:ADC#8:STAcoli:LDAofc:STAcoli+1:LDA#12:LDX#(coli �256):LDY#(coli �256):JMP&FFF1
j.text EQUS" EUG31                        Press     <SPACE> to continue A         D Ford    Screen    "
�.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
"�.x EQUB0:.y EQUB0:.xc EQUB0:.len EQUB0:.byte EQUB0:.line EQUB0:.page EQUB0:.clock EQUW5:.vector EQUW0:.linno EQUB0:.bts EQUB8:EQUB16:.chars EQUB10:EQUB5:.ascii EQUB0:EQUD0:EQUD0:.b EQUB1:.c EQUB1:.coli EQUD0:EQUB0
,,.ofc EQUB0:.onc EQUB7:.cycle EQUB&FF:]:�
6*LOAD TitData
@
�start
J�"MENU"
�
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00000020  6f 6d 69 6e 69 63 20 46  6f 72 64 20 31 39 39 37  |ominic Ford 1997|
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00000cf0  0d ff                                             |..|
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