History
- Released
- 23 November 1991
- Code
- Crossfire
- Music
- JCH (Jens-Christian Huus) — "Introzak"
- Graphics
- Silco
- Charset
- Ecco
- Group
- Unique — Denmark, founded August 1991
A Danish crack intro released on 23 November 1991 — just three months after Unique's founding in August 1991. Crossfire coded the intro while Silco handled the graphics and Ecco contributed the charset. The music is JCH's "Introzak" — a composition by Jens-Christian Huus, one of the most sought-after SID musicians in the C64 scene, whose tunes appear in crack intros from groups across Europe. The SID is preserved in the HVSC. Unique used the abbreviation [U] and operated from Denmark, which by 1991 had established itself as a major hub for C64 scene activity alongside Sweden and Norway. The precise date of this release — 23 November 1991 — is unusually specific for crack intro documentation, suggesting the date was embedded in the release itself or recorded by the original distributors. Despite the group's brief existence, the quality of contributors suggests connections to Denmark's established scene infrastructure.
Sources: CSDb
// ============================================ // output - Disassembled Source // ============================================ // KickAssembler syntax // Generated by Restore 64 v0.2.1 alpha build 298, 2026-04-11 21:36:58 // https://restore64.dev by datucker / Rabenauge // // Load address: $0800 End: $1bff (5120 bytes) // Crunched with Cruncher AB — depacked by emulation // Packer entry: $080d (via BASIC SYS 2061) // Entry point: $1728 (5928) // IRQ handler: $17dc (irq_17dc) // IRQ handler: $1807 (irq_1807) // IRQ handler: $184c (irq_184c) // IRQ handler: $187c (irq_187c) // IRQ handler: $ea31 (irq_ea31) // // Code: 1649 bytes, Data: 3471 bytes // Labels: 120, Subroutines: 7 // // Cross-references: all OK // ============================================ // --- Region $1000-$1006 --- .pc = $1000 "sub_1000" // Referenced by: jsr from $174c sub_1000: jmp loc_1020 // Referenced by: jsr from $1839 sub_1003: jmp loc_104b dat_1006: .byte $0f // . // --- Region $1020-$105e --- .pc = $1020 "loc_1020" loc_1020: ldx #$02 loc_1022: lda $14fb,x sta $14f5,x lda $14fe,x sta $14f8,x dex bpl loc_1022 lda #$04 sta $155c ldy #$00 tya loc_1039: sta $d400,y sta $1511,y iny cpy #$1b bne loc_1039 lda dat_1006 sta $d418 rts loc_104b: lda $fb pha lda $fc pha ldx #$02 dec $155c bpl loc_105d lda #$04 sta $155c loc_105d: bne loc_1067 // --- Region $1067-$1453 --- .pc = $1067 "loc_1067" loc_1067: jmp loc_11c3 loc_106a: lda $1523,x sta $151a,x lda $14f5,x sta $fb lda $14f8,x sta $fc ldy #$00 tya sta $151d,x lda ($fb),y bpl loc_109a and #$7f asl sta $1511,x inc $14f5,x inc $fb bne loc_1096 inc $14f8,x inc $fc loc_1096: ldy #$00 lda ($fb),y loc_109a: tay lda $160d,y sta $fb lda $1613,y sta $fc loc_10a5: ldy $1514,x lda ($fb),y bmi loc_10e4 beq loc_10da cmp #$7e beq loc_10d0 sta $1526,x asl clc adc $1511,x tay lda dat_1453,y clc adc $100e,x sta $1541,x lda $1454,y adc #$00 sta $1544,x jmp loc_10d3 loc_10d0: inc $151d,x loc_10d3: lda #$ff sta $150b,x bne loc_110c loc_10da: lda #$fe sta $150b,x