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Easy Script Plus

2026-05-18T20:54:58Z

Enigma:

[[Category:C64 Game Compilation]]

=== Content ===
==== Disk 1 ====
===== Side 0 =====
* [[Easy Script]]
===== Side 1 =====
Side 1 is empty.
==== Disk 2 ====
* [[6 Games Programs]]
===== Side 0 =====
* [[Single Disk Backup]] V1.0 by Michael Schaff, 27 Jul 1982
* [[Scooper Froot]] [https://www.lemon64.com/game/sooper-froot lemon64 link]
* [[Stellar Wars]] [https://www.mobygames.com/game/92960/stellar-wars/ mobygames link]
* [[Depth Charge]] [https://www.mobygames.com/game/69748/depth-charge/ mobygames link]
* [[Labyrinth]] (color version) [https://www.mobygames.com/game/50163/labyrinth/ mobygames link]
* [[The Quest (Commodore)]] [https://www.mobygames.com/game/84690/the-quest/ mobygames link]
* [[Patience]] [https://www.mobygames.com/game/72041/patience/ mobygames link]

===== Side 1 =====
Side 1 is empty.

== Source 1 == 
{| class="wikitable"
|-
! Property !! Data
|-
| Title || Easy Script Plus
|-
| Publisher and/or Developer || Commodore UK Ltd., Precision Software Ltd.
|-
| Year || 1983?
|-
| Disk(s) || 1
|-
| Number of Index Holes || ?
|-
| Media Type || 5.25 DSDD
|-
| Retail, Budget or Compilation (with name) || Compilation
|-
| Country of Release || UK
|-
| Language(s) || English
|-
| Platform || C64
|-
| NTSC or PAL || PAL
|-
| Protection || [[Easy Script]]: Checks error 4 on track 35 sector 1. [[6 Games Programs]]Checks for error on track 1 sector 5
|-
| Working? || Yes
|-
| Archived || 14 Mar 2026 enigma/parser, provided by @rndt@F64
|-
| Verified by || enigma
|}
<gallery>
File:Commodore_6GamesPrograms_arndt_a_dos_r1.png|Disk 2 Side 0
</gallery>
==== Streams ====
===== Disk 1 =====
===== Disk 2 =====
[[File:Streams_Commodore_6GamesPrograms_arndt.zip]]
==== G64 ====
===== Disk 1 =====
===== Disk 2 =====
[[File:Commodore_6GamesPrograms_arndt_s0.g64]]

Disk side 1 is empty.

== Additional Information == 

The initial loader loads to $9E80 and then decrypts with
0225 a2 00 ldx #$00
0227 a0 08 ldy #$08 // 8 bits
0229 bd 80 9e lda $9e80,x
022c 8d 3f 02 sta $023f
022f 0e 3f 02 asl $023f // shift highest bit to carry
0232 6a ror a // shift it in byte from top, effectively mirroring the bits
0233 88 dey
0234 d0 f9 bne $022f
0236 9d 80 9e sta $9e80,x
0239 e8 inx
023a d0 eb bne $0227
023c 4c 80 9e jmp $9e80
The routine is the same for all games.

The decrypted routine that loads the game looks like this:
.C:9e80 20 CC FF JSR $FFCC // CLRCHN
.C:9e83 A9 0F LDA #$0F
.C:9e85 A2 08 LDX #$08
.C:9e87 A0 0F LDY #$0F
.C:9e89 20 BA FF JSR $FFBA // SETLFS
.C:9e8c A9 02 LDA #$02
.C:9e8e A2 DD LDX #$DD
.C:9e90 A0 9E LDY #$9E
.C:9e92 20 BD FF JSR $FFBD // SETNAM
.C:9e95 20 C0 FF JSR $FFC0 // OPEN
.C:9e98 A9 02 LDA #$02
.C:9e9a A2 08 LDX #$08
.C:9e9c A0 02 LDY #$02
.C:9e9e 20 BA FF JSR $FFBA // SETLFS
.C:9ea1 A9 01 LDA #$01
.C:9ea3 A2 DF LDX #$DF
.C:9ea5 A0 9E LDY #$9E
.C:9ea7 20 BD FF JSR $FFBD // SETNAM
.C:9eaa 20 C0 FF JSR $FFC0 // OPEN
.C:9ead A2 0F LDX #$0F
.C:9eaf 20 C9 FF JSR $FFC9 // CHKOUT
.C:9eb2 A0 00 LDY #$00
.C:9eb4 B9 D1 9E LDA $9ED1,Y
.C:9eb7 F0 06 BEQ $9EBF
.C:9eb9 20 D2 FF JSR $FFD2 // CHROUT
.C:9ebc C8 INY
.C:9ebd D0 F5 BNE $9EB4
.C:9ebf 20 CC FF JSR $FFCC // CLRCHN
.C:9ec2 A2 0F LDX #$0F
.C:9ec4 20 C6 FF JSR $FFC6 // CHKIN
.C:9ec7 20 CF FF JSR $FFCF // CHRIN
.C:9eca C9 32 CMP #$32
.C:9ecc F0 12 BEQ $9EE0
.C:9ece 6C FC FF JMP ($FFFC) // RESET
.C:9ed1 55 31 EOR $31,X // This is sent to disk drive
.C:9ed3 3A NOOP
.C:9ed4 32 JAM
.C:9ed5 20 30 20 JSR $2030
.C:9ed8 31 20 AND ($20),Y
.C:9eda 35 0D AND $0D,X
.C:9edc 00 BRK
.C:9edd 49 30 EOR #$30
.C:9edf 23 20 RLA ($20,X)
.C:9ee1 CC FF A9 CPY $A9FF
.C:9ee4 0F 20 C3 SLO $C320
.C:9ee7 FF A9 02 ISB $02A9,X
.C:9eea 20 C3 FF JSR $FFC3 // CLOSE
.C:9eed A2 01 LDX #$01
.C:9eef A0 08 LDY #$08
.C:9ef1 18 CLC
.C:9ef2 20 9C FF JSR $FF9C // MEMBOT
.C:9ef5 A9 01 LDA #$01
.C:9ef7 A2 08 LDX #$08
.C:9ef9 A0 00 LDY #$00
.C:9efb 20 BA FF JSR $FFBA // SETLFS
.C:9efe AD 86 9F LDA $9F86
.C:9f01 A2 87 LDX #$87
.C:9f03 A0 9F LDY #$9F
.C:9f05 20 BD FF JSR $FFBD // SETNAM
.C:9f08 A9 00 LDA #$00
.C:9f0a A2 01 LDX #$01
.C:9f0c A0 08 LDY #$08
.C:9f0e 20 D5 FF JSR $FFD5 // LOAD
.C:9f11 90 03 BCC $9F16
.C:9f13 6C FC FF JMP ($FFFC) // RESET
.C:9f16 86 2D STX $2D // VARTAB vector
.C:9f18 84 2E STY $2E
.C:9f1a A5 2B LDA $2B // Pushes TXTTAB vector
.C:9f1c 48 PHA
.C:9f1d A5 2C LDA $2C
.C:9f1f 48 PHA
.C:9f20 A0 00 LDY #$00
.C:9f22 A2 08 LDX #$08 // for 8 bits
.C:9f24 B1 2B LDA ($2B),Y // Load from Basic Program Text
.C:9f26 0A ASL A // shift left bit to carry
.C:9f27 6E 79 9F ROR $9F79 // rotate it right into 9F79 (mirrors bits in byte)
.C:9f2a CA DEX
.C:9f2b D0 F9 BNE $9F26
.C:9f2d AD 79 9F LDA $9F79
.C:9f30 91 2B STA ($2B),Y // write it back
.C:9f32 E6 2B INC $2B
.C:9f34 D0 02 BNE $9F38
.C:9f36 E6 2C INC $2C
.C:9f38 A5 2C LDA $2C
.C:9f3a C5 2E CMP $2E
.C:9f3c D0 E4 BNE $9F22
.C:9f3e A5 2B LDA $2B
.C:9f40 C5 2D CMP $2D
.C:9f42 D0 DE BNE $9F22 // loop until VARTAB is reached
.C:9f44 68 PLA // restore TXTAB
.C:9f45 85 2C STA $2C
.C:9f47 68 PLA
.C:9f48 85 2B STA $2B
.C:9f4a 20 33 A5 JSR $A533 // Re-link BASIC program
.C:9f4d A2 15 LDX #$15 // who knows why 21 bytes starting from 9F6A are read here
.C:9f4f BD 6A 9F LDA $9F6A,X
.C:9f55 CA DEX
.C:9f56 10 F7 BPL $9F4F
.C:9f58 A9 4C LDA #$4C // write in buffer for CHRGET routine: 4C AD 02
.C:9f5a 85 73 STA $73
.C:9f5c A9 AD LDA #$AD
.C:9f5e 85 74 STA $74
.C:9f60 A9 02 LDA #$02
.C:9f62 85 75 STA $75
.C:9f64 20 8E A6 JSR $A68E // Set program pointer to BASIC-start
.C:9f67 4C AE A7 JMP $A7AE // Interpreter loop, set up next statement for execution
.C:9f6a A5 3A LDA $3A // These are the bytes loaded in the loop up there for unknown reason
.C:9f6c C9 FF CMP #$FF
.C:9f6e F0 F4 BEQ $9F64
.C:9f70 E6 7A INC $7A
.C:9f72 D0 02 BNE $9F76
.C:9f74 E6 7B INC $7B
.C:9f76 4C 79 00 JMP $0079
.C:9f79 00 BRK
.C:9f7a 00 BRK
.C:9f7b 00 BRK
.C:9f7c 00 BRK
.C:9f7d 00 BRK
.C:9f7e 00 BRK
.C:9f7f 00 BRK
.C:9f80 00 BRK
.C:9f81 00 BRK
.C:9f82 00 BRK
.C:9f83 00 BRK
.C:9f84 00 BRK
.C:9f85 00 BRK
.C:9f86 0D 53 4F ORA $4F53 // File Name with suffix 2
.C:9f89 4F 50 45 SRE $4550
.C:9f8c 52 JAM
.C:9f8d 20 46 52 JSR $5246
.C:9f90 4F 4F 54 SRE $544F
.C:9f93 32 JAM

Easy Script Plus

2026-05-18T20:51:43Z

Enigma:

[[Category:C64 Game Compilation]]

=== Content ===
==== Disk 1 ====
===== Side 0 =====
* [[Easy Script]]
===== Side 1 =====
Side 1 is empty.
==== Disk 2 ====
* [[6 Games Programs]]
===== Side 0 =====
* [[Single Disk Backup]] V1.0 by Michael Schaff, 27 Jul 1982
* [[Scooper Froot]] [https://www.lemon64.com/game/sooper-froot lemon64 link]
* [[Stellar Wars]] [https://www.mobygames.com/game/92960/stellar-wars/ mobygames link]
* [[Depth Charge]] [https://www.mobygames.com/game/69748/depth-charge/ mobygames link]
* [[Labyrinth]] (color version) [https://www.mobygames.com/game/50163/labyrinth/ mobygames link]
* [[The Quest (Commodore)]] [https://www.mobygames.com/game/84690/the-quest/ mobygames link]
* [[Patience]] [https://www.mobygames.com/game/72041/patience/ mobygames link]

===== Side 1 =====
Side 1 is empty.

== Source 1 == 
{| class="wikitable"
|-
! Property !! Data
|-
| Title || Easy Script Plus
|-
| Publisher and/or Developer || Commodore UK Ltd., Precision Software Ltd.
|-
| Year || 1983?
|-
| Disk(s) || 1
|-
| Number of Index Holes || ?
|-
| Media Type || 5.25 DSDD
|-
| Retail, Budget or Compilation (with name) || Compilation
|-
| Country of Release || UK
|-
| Language(s) || English
|-
| Platform || C64
|-
| NTSC or PAL || PAL
|-
| Protection || Checks for error on track 1 sector 5
|-
| Working? || Yes
|-
| Archived || 14 Mar 2026 enigma/parser, provided by @rndt@F64
|-
| Verified by || enigma
|}
<gallery>
File:Commodore_6GamesPrograms_arndt_a_dos_r1.png|Disk 2 Side 0
</gallery>
==== Streams ====
===== Disk 1 =====
===== Disk 2 =====
[[File:Streams_Commodore_6GamesPrograms_arndt.zip]]
==== G64 ====
===== Disk 1 =====
===== Disk 2 =====
[[File:Commodore_6GamesPrograms_arndt_s0.g64]]

Disk side 1 is empty.

== Additional Information == 

The initial loader loads to $9E80 and then decrypts with
0225 a2 00 ldx #$00
0227 a0 08 ldy #$08 // 8 bits
0229 bd 80 9e lda $9e80,x
022c 8d 3f 02 sta $023f
022f 0e 3f 02 asl $023f // shift highest bit to carry
0232 6a ror a // shift it in byte from top, effectively mirroring the bits
0233 88 dey
0234 d0 f9 bne $022f
0236 9d 80 9e sta $9e80,x
0239 e8 inx
023a d0 eb bne $0227
023c 4c 80 9e jmp $9e80
The routine is the same for all games.

The decrypted routine that loads the game looks like this:
.C:9e80 20 CC FF JSR $FFCC // CLRCHN
.C:9e83 A9 0F LDA #$0F
.C:9e85 A2 08 LDX #$08
.C:9e87 A0 0F LDY #$0F
.C:9e89 20 BA FF JSR $FFBA // SETLFS
.C:9e8c A9 02 LDA #$02
.C:9e8e A2 DD LDX #$DD
.C:9e90 A0 9E LDY #$9E
.C:9e92 20 BD FF JSR $FFBD // SETNAM
.C:9e95 20 C0 FF JSR $FFC0 // OPEN
.C:9e98 A9 02 LDA #$02
.C:9e9a A2 08 LDX #$08
.C:9e9c A0 02 LDY #$02
.C:9e9e 20 BA FF JSR $FFBA // SETLFS
.C:9ea1 A9 01 LDA #$01
.C:9ea3 A2 DF LDX #$DF
.C:9ea5 A0 9E LDY #$9E
.C:9ea7 20 BD FF JSR $FFBD // SETNAM
.C:9eaa 20 C0 FF JSR $FFC0 // OPEN
.C:9ead A2 0F LDX #$0F
.C:9eaf 20 C9 FF JSR $FFC9 // CHKOUT
.C:9eb2 A0 00 LDY #$00
.C:9eb4 B9 D1 9E LDA $9ED1,Y
.C:9eb7 F0 06 BEQ $9EBF
.C:9eb9 20 D2 FF JSR $FFD2 // CHROUT
.C:9ebc C8 INY
.C:9ebd D0 F5 BNE $9EB4
.C:9ebf 20 CC FF JSR $FFCC // CLRCHN
.C:9ec2 A2 0F LDX #$0F
.C:9ec4 20 C6 FF JSR $FFC6 // CHKIN
.C:9ec7 20 CF FF JSR $FFCF // CHRIN
.C:9eca C9 32 CMP #$32
.C:9ecc F0 12 BEQ $9EE0
.C:9ece 6C FC FF JMP ($FFFC) // RESET
.C:9ed1 55 31 EOR $31,X // This is sent to disk drive
.C:9ed3 3A NOOP
.C:9ed4 32 JAM
.C:9ed5 20 30 20 JSR $2030
.C:9ed8 31 20 AND ($20),Y
.C:9eda 35 0D AND $0D,X
.C:9edc 00 BRK
.C:9edd 49 30 EOR #$30
.C:9edf 23 20 RLA ($20,X)
.C:9ee1 CC FF A9 CPY $A9FF
.C:9ee4 0F 20 C3 SLO $C320
.C:9ee7 FF A9 02 ISB $02A9,X
.C:9eea 20 C3 FF JSR $FFC3 // CLOSE
.C:9eed A2 01 LDX #$01
.C:9eef A0 08 LDY #$08
.C:9ef1 18 CLC
.C:9ef2 20 9C FF JSR $FF9C // MEMBOT
.C:9ef5 A9 01 LDA #$01
.C:9ef7 A2 08 LDX #$08
.C:9ef9 A0 00 LDY #$00
.C:9efb 20 BA FF JSR $FFBA // SETLFS
.C:9efe AD 86 9F LDA $9F86
.C:9f01 A2 87 LDX #$87
.C:9f03 A0 9F LDY #$9F
.C:9f05 20 BD FF JSR $FFBD // SETNAM
.C:9f08 A9 00 LDA #$00
.C:9f0a A2 01 LDX #$01
.C:9f0c A0 08 LDY #$08
.C:9f0e 20 D5 FF JSR $FFD5 // LOAD
.C:9f11 90 03 BCC $9F16
.C:9f13 6C FC FF JMP ($FFFC) // RESET
.C:9f16 86 2D STX $2D // VARTAB vector
.C:9f18 84 2E STY $2E
.C:9f1a A5 2B LDA $2B // Pushes TXTTAB vector
.C:9f1c 48 PHA
.C:9f1d A5 2C LDA $2C
.C:9f1f 48 PHA
.C:9f20 A0 00 LDY #$00
.C:9f22 A2 08 LDX #$08 // for 8 bits
.C:9f24 B1 2B LDA ($2B),Y // Load from Basic Program Text
.C:9f26 0A ASL A // shift left bit to carry
.C:9f27 6E 79 9F ROR $9F79 // rotate it right into 9F79 (mirrors bits in byte)
.C:9f2a CA DEX
.C:9f2b D0 F9 BNE $9F26
.C:9f2d AD 79 9F LDA $9F79
.C:9f30 91 2B STA ($2B),Y // write it back
.C:9f32 E6 2B INC $2B
.C:9f34 D0 02 BNE $9F38
.C:9f36 E6 2C INC $2C
.C:9f38 A5 2C LDA $2C
.C:9f3a C5 2E CMP $2E
.C:9f3c D0 E4 BNE $9F22
.C:9f3e A5 2B LDA $2B
.C:9f40 C5 2D CMP $2D
.C:9f42 D0 DE BNE $9F22 // loop until VARTAB is reached
.C:9f44 68 PLA // restore TXTAB
.C:9f45 85 2C STA $2C
.C:9f47 68 PLA
.C:9f48 85 2B STA $2B
.C:9f4a 20 33 A5 JSR $A533 // Re-link BASIC program
.C:9f4d A2 15 LDX #$15 // who knows why 21 bytes starting from 9F6A are read here
.C:9f4f BD 6A 9F LDA $9F6A,X
.C:9f55 CA DEX
.C:9f56 10 F7 BPL $9F4F
.C:9f58 A9 4C LDA #$4C // write in buffer for CHRGET routine: 4C AD 02
.C:9f5a 85 73 STA $73
.C:9f5c A9 AD LDA #$AD
.C:9f5e 85 74 STA $74
.C:9f60 A9 02 LDA #$02
.C:9f62 85 75 STA $75
.C:9f64 20 8E A6 JSR $A68E // Set program pointer to BASIC-start
.C:9f67 4C AE A7 JMP $A7AE // Interpreter loop, set up next statement for execution
.C:9f6a A5 3A LDA $3A // These are the bytes loaded in the loop up there for unknown reason
.C:9f6c C9 FF CMP #$FF
.C:9f6e F0 F4 BEQ $9F64
.C:9f70 E6 7A INC $7A
.C:9f72 D0 02 BNE $9F76
.C:9f74 E6 7B INC $7B
.C:9f76 4C 79 00 JMP $0079
.C:9f79 00 BRK
.C:9f7a 00 BRK
.C:9f7b 00 BRK
.C:9f7c 00 BRK
.C:9f7d 00 BRK
.C:9f7e 00 BRK
.C:9f7f 00 BRK
.C:9f80 00 BRK
.C:9f81 00 BRK
.C:9f82 00 BRK
.C:9f83 00 BRK
.C:9f84 00 BRK
.C:9f85 00 BRK
.C:9f86 0D 53 4F ORA $4F53 // File Name with suffix 2
.C:9f89 4F 50 45 SRE $4550
.C:9f8c 52 JAM
.C:9f8d 20 46 52 JSR $5246
.C:9f90 4F 4F 54 SRE $544F
.C:9f93 32 JAM