History
- Group
- Jazzcat Cracking Team [JCT]
A crack intro from the Jazzcat Cracking Team, abbreviated JCT. No CSDb release match was found, and the group's origins — country, founding date, and core members — remain unconfirmed through available scene databases. The name follows the common pattern of combining a distinctive handle with a functional descriptor, suggesting the group may have been built around a single lead member. The intros.c64.org listing attracted three comments between 2008 and 2021, including from Morpheus (2021), Rough (2010), and ZTH/Abnormal (2008) — the latter two being prominent scene archivists. No documentation surfaces on Doc Snyder's page, Demozoo, Atlantis, or in preserved diskmag archives. Ranked 259th on intros.c64.org, the intro holds a respectable mid-tier position. Without confirmed credits, it is impossible to attribute the code, music, or graphics to specific individuals. JCT represents one of the many groups whose work survives primarily through the intros.c64.org preservation effort.
Sources: intros.c64.org
// ============================================ // output - Disassembled Source // ============================================ // KickAssembler syntax // Generated by Restore 64 v0.2.1 alpha build 298, 2026-04-01 10:59:25 // https://restore64.dev by datucker / Rabenauge // // Load address: $0801 End: $ffff (63487 bytes) // Crunched with NSU Packer 1.1 — depacked by emulation // Packer entry: $080d (via BASIC SYS 2061) // Entry point: $93c0 (37824) // IRQ handler: $91a0 (irq_91a0) // IRQ handler: $ea1f (irq_ea1f) // // Code: 900 bytes, Data: 62587 bytes // Labels: 237, Subroutines: 10 // // Verification: 4 line(s) auto-corrected to .byte for exact byte matching // // Cross-references: all OK // ============================================ // --- Region $188d-$188d --- .pc = $188d "Segment $188d" brk // --- Region $8cd0-$8cd0 --- .pc = $8cd0 "Segment $8cd0" brk // --- Region $9000-$9062 --- .pc = $9000 "loc_9000" loc_9000: jsr sub_90a6 lda #$00 sta $dd00 lda $d018 and #$f0 ora #$00 and #$0f ora #$20 sta $d018 lda #$c8 sta $0288 jmp loc_90f7 dat_901e: .byte $00 // . // Referenced by: jsr from $91bd sub_901f: ldx #$00 ldy #$00 loc_9023: tya pha lda dat_9062,x tay lda $9072,y sta $9094 pla tay sty $9095 sec sbc $9094 clc rol sec sbc #$80 sec sbc $9095 sta $d001,y iny iny inx cpx #$08 bne loc_9023 ldx #$00 loc_904d: inc dat_9062,x lda dat_9062,x cmp #$21 bne loc_905c lda #$00 sta dat_9062,x loc_905c: inx cpx #$10 bne loc_904d rts dat_9062: .byte $00 // . // --- Region $90a6-$9191 --- .pc = $90a6 "sub_90a6" // Referenced by: jsr from $9000 sub_90a6: ldy #$00 loc_90a8: lda $9096,y sta dat_d000,y iny cpy #$10 bne loc_90a8 lda #$7f sta $d015 sta $d01d sta $d01c lda #$40 sta $d010 ldy #$07 lda #$01 loc_90c7: sta $d027,y dey bpl loc_90c7 lda #$07 sta $d025 lda #$08 sta $d026 ldy #$30 sty txt_cbf8 iny sty $cbf9 iny sty $cbfa sty $cbfb ldy #$33 sty $cbfc ldy #$31 sty $cbfd ldy #$34 sty $cbfe rts loc_90f7: jsr sub_916d jsr $e544 ldy #$00 sty $d020 sty $d021