History
- Released
- September 1986
- Group
- Yeti Factories — Germany, founded 1986
One of the earliest intros in the entire ranked collection -- released in September 1986, just two years into the C64 cracking scene's formative period. Yeti Factories was a German group founded in 1986, and this fourth numbered intro is listed on CSDb as "Yeti Intro." No individual credits for code, music, or graphics are recorded on CSDb, though the release confirms the group existed under the abbreviation YF. The 1986 date places this intro in the era before dedicated SID musicians and graphic artists became standard members of cracking groups -- visual and audio elements were often handled by the coder alone. The intros.c64.org page attracted comments from an ex-Yeti member in 2014, suggesting the group's alumni retained a connection to their early work decades later. As a German operation from the mid-1980s, Yeti Factories was part of the first wave of continental European cracking groups that would come to dominate the scene.
Sources: CSDb · intros.c64.org
// ============================================ // output - Disassembled Source // ============================================ // KickAssembler syntax // Generated by Restore 64 v0.2.1 alpha build 298, 2026-04-01 10:59:41 // https://restore64.dev by datucker / Rabenauge // // Load address: $0801 End: $0cfa (1274 bytes) // Entry point: $0b25 (via BASIC SYS 2853) // IRQ handler: $09aa (irq_09aa) // IRQ handler: $ea31 (loc_ea31) // // Code: 404 bytes, Data: 870 bytes // Labels: 34, Subroutines: 3 // // Cross-references: all OK // ============================================ // --- Region $0980-$0a25 --- .pc = $0980 "sub_0980" // Referenced by: jsr from $0b2f sub_0980: lda #$00 sta $fe lda #$07 sta $d016 sta $ff sei lda #$aa sta $0314 lda #$09 sta $0315 lda #$8e sta $d012 lda $d011 and #$7f sta $d011 lda #$51 sta $d01a cli rts irq_09aa: lda $d019 sta $d019 bmi loc_09b9 lda $dc0d cli jmp $ea31 loc_09b9: lda $d012 cmp #$ae bcs loc_09e8 lda #$02 sta $d020 sta $d021 ldx $ff dex stx $d016 stx $ff cpx #$ff beq loc_09fd ldx $ff dex stx $d016 stx $ff cpx #$ff beq loc_09fd lda #$ae sta $d012 jmp $febc loc_09e8: lda #$00 sta $d020 sta $d021 lda #$c8 sta $d016 lda #$8e sta $d012 jmp $febc loc_09fd: lda #$07 sta $ff sta $d016 ldx #$00 loc_0a06: lda $0609,x sta $0608,x inx cpx #$27 bne loc_0a06 ldx $fe lda dat_0a24,x sta $062f inx stx $fe lda #$ae sta $d012 jmp $febc dat_0a24: .byte $1b,$2f // ./ // --- Region $0b25-$0bed --- .pc = $0b25 "main_0b25" main_0b25: lda #$05 jsr $ffd2 lda #$93 jsr $ffd2 jsr sub_0980 lda #$46 ldy #$00 loc_0b36: sta $d001,y iny iny cpy #$08 bne loc_0b36 lda #$ff sta $d015 sta $d017 sta $d01d sta $d01c lda #$01 ldx #$06 ldy #$0e sta $d027 sta $d028 sta $d029 sta $d02a stx $d026 sty $d025 lda #$22 sta $07f8 lda #$21 sta $07f9 lda #$23 sta $07fa lda #$24 sta $07fb lda #$4b