scene.org File Archive

File download

<root>­/­parties­/­2025­/­vccc25­/­christmas_challenge/longshotlogonsystem_amstradcpc_z80assembler_45b_vc3-2025.zip

File size:
461 741 bytes (450.92K)
File date:
2025-12-30 23:34:07
Download count:
all-time: 2

Screenshot (by Demozoo)

Screenshot

Preview

  • file_id.diz 472B
  • VC3_2025-CAT_DISK (FOR FUN).dsk 190.25K
  • VC3_2025-DSK.dsk 190.25K
  • VC3_2025_IMAGE_CODE.png 376.52K
  • VC3_2025_SCREENSHOT.png 87.87K
  • VC3_2025_SOURCE_45b.asm 1.79K

file_id.diz

VC3 2025 XMAS 

Author: Longshot / Logon System
Category: Christmas Challenge
System:   Amstrad CPC 
Language: Z80A Assembly 
Len source code: 1937 bytes 
Len exe file:    45 bytes
Len code only:   45 bytes

Instructions:
Insert VC32025.DSK in any emulator (Amspirit, Winape,...) 
type RUN "STUB"

Description:
Brute force method.
200 bits of raw data allow the first half of the pattern to be displayed while the second half is built in memory in reverse.