History
- Released
- 1990
- Code
- Paninaro
- Music
- Drax (Thomas Mogensen) — "Church"
- Group
- Optical — United States, founded 1990
A 1990 crack intro from Optical, an American group founded the same year and identified by the abbreviation OPT. Paninaro coded the intro while Drax (Thomas Mogensen) contributed "Church" — preserved in the HVSC. Drax was a Danish SID composer whose prolific output made him one of the most frequently featured musicians in crack intros worldwide, and his appearance in an American production illustrates the transatlantic reach of European C64 music. No graphic artist is individually named on CSDb, though the release does credit unnamed contributors for graphics and charset work. Optical operated from the United States, where the C64 cracking scene was smaller but still active in the early 1990s. The group's founding in 1990 placed them late in the C64's commercial lifecycle — by this point the platform had been commercially superseded in America, but a dedicated community continued producing new content. The sparse archival record suggests Optical had limited visibility outside the American scene.
Sources: CSDb
// ============================================ // output - Part 1 of 3 // ============================================ // KickAssembler syntax // Generated by Restore 64 v0.2.1 alpha build 298, 2026-04-11 21:36:25 // https://restore64.dev by datucker / Rabenauge // // Load address: $0800 End: $efff (59392 bytes) // Crunched with Cruncher AB — depacked by emulation // Packer entry: $080d (via BASIC SYS 2061) // Entry point: $1000 (4096) // IRQ handler: $10f0 (irq_10f0) // IRQ handler: $1133 (irq_1133) // IRQ handler: $12fe (irq_12fe) // IRQ handler: $1334 (irq_1334) // IRQ handler: $ea31 (loc_ea31) // // Code: 3120 bytes, Data: 56272 bytes // Labels: 398, Subroutines: 4 // // Cross-references: all OK // ============================================ // --- Region $1000-$15da --- .pc = $1000 "main_1000" main_1000: jsr sub_1573 lda #$00 sta $0286 sta $d021 sta $d020 jsr $e544 ldx #$00 loc_1013: lda $3b48,x sta $d000,x inx cpx #$11 bne loc_1013 lda #$03 sta $d026 lda #$0e sta $d025 ldx #$00 lda #$06 loc_102c: sta $d027,x inx cpx #$08 bne loc_102c ldx #$00 lda #$00 loc_1038: sta dat_0800,x sta $0900,x sta $0a00,x sta $0b00,x sta $0c00,x sta $0d00,x sta $0e00,x sta $0f00,x inx bne loc_1038 bit $1990 ldx #$00 loc_1058: lda #$07 sta $0400,x inx bne loc_1058 lda #$07 loc_1062: sta $0500,x inx cpx #$40 bne loc_1062 ldx #$00 txa loc_106d: sta $0404,x clc adc #$01 sta $042c,x clc adc #$01 sta $0454,x clc adc #$01 sta $047c,x clc adc #$01 sta $04a4,x clc adc #$01 sta $04cc,x clc adc #$01 sta $04f4,x clc adc #$01 sta $051c,x clc adc #$01 inx cpx #$20 bne loc_106d ldx #$00 lda #$0a loc_10a6: sta $d804,x sta $d82c,x sta $d854,x sta $d87c,x sta $d8a4,x sta $d8cc,x sta $d8f4,x inx cpx #$20 bne loc_10a6 sei lda #$f0 sta $0314 lda #$10 sta $0315 lda #$01 sta $d01a lda #$7f sta $dc0d lda #$30 sta $d012 lda #$1b sta $d011 lda #$35 sta $01 lda #$00 jsr $e000 lda #$37 sta $01 jmp loc_1413 dat_10ef: