History
- Released
- March 1989
- Group
- Pulsar [PUL] — United Kingdom, CSDb group ID #628
- Code
- Jog
- Graphics
- STE
- Music
- Diflex (Markus Schneider) — "Rhenus Demo '88"
This crack intro from Pulsar — a UK-based group founded in 1988 — dates to March 1989 and is catalogued on CSDb as release #58644 under the title "Pulsar Intro." The code was written by Jog, with graphics by STE and music by Diflex (Markus Schneider), using the SID composition "Rhenus Demo '88." Doc Snyder's page confirms these credits for Crack Intro #01 and maps it to CSDb release #58644. The CSDb entry also references additional music credits from Mike (Michael Hendriks), Johannes Bjerregaard, and JCH (Jens-Christian Huus), suggesting the intro features multiple selectable tunes — including "Sound Example #1," "Beyond," "Shape," "She's Just a Maniac," and "Chase." Pulsar maintained an active presence in the UK and European cracking scene throughout the late 1980s, with Doc Snyder's page documenting six of their intros. The group's website was later hosted at pulsar.scoopex.org.
Sources: CSDb Release · Doc Snyder · intros.c64.org
// ============================================ // pulsar-01 - Disassembled Source // ============================================ // KickAssembler syntax // Generated by Restore 64 vdisasm-one 1.0 build 1, 2026-03-29 17:54:22 // https://restore64.dev by datucker / Rabenauge // // Load address: $0800 End: $ffff (63488 bytes) // Crunched with Exomizer — depacked by emulation // Packer entry: $0812 (via BASIC SYS 2066) // Entry point: $0334 (820) // // Code: 671 bytes, Data: 62817 bytes // Labels: 111, Subroutines: 3 // // Verification: 6 line(s) auto-corrected to .byte for exact byte matching // // Cross-references: all OK // ============================================ // --- Region $0914-$091e --- .pc = $0914 "Program $0914" sei sei sei .byte $7c,$3c,$3c // nop $3c3c,x // ILLEGAL .byte $3c,$3c,$3c // nop $3c3c,x // ILLEGAL dat_091d: .byte $3c,$3c // << // --- Region $10a8-$1274 --- .pc = $10a8 "loc_10a8" loc_10a8: sbc #$10 lda #$ff sta $d012 lda #$7a sta $ff lda $144c ora #$10 sta $d016 ldx #$00 loc_10bd: lda $ff loc_10bf: cmp $d012 bne loc_10bf ldy #$09 loc_10c6: dey bne loc_10c6 lda $1479,x sta $d022 lda $14bd,x sta $d023 lda $ff adc #$01 sta $ff inx cpx #$40 bne loc_10bd jsr sub_10ef jsr sub_1105 jsr sub_1119 pla tax pla tay pla rti // Referenced by: jsr from $10e0 sub_10ef: { ldx #$00 lda $1479,x pha loop: lda $147a,x sta $1479,x inx cpx #$3f bne loop pla sta $1479,x rts } // Referenced by: jsr from $10e3 sub_1105: { ldx #$3f lda $14bd,x pha loop: lda $14bd,x sta $14be,x dex bpl loop pla sta $14bd rts } // Referenced by: jsr from $10e6 sub_1119: lda $1450 beq loc_1184 lda $04 clc adc #$14 sta $02 lda $05 adc #$00 sta $03 ldx #$00 ldy #$00 loc_112f: lda ($04),y asl asl sta $0450,x clc adc #$01 sta $0451,x adc #$01 sta $0478,x adc #$01 sta $0479,x lda ($02),y asl asl sta $04c8,x clc adc #$01 sta $04c9,x adc #$01 sta $04f0,x adc #$01 sta $04f1,x inx inx iny cpy #$14 bne loc_112f