DiRoccoVision ROM Ripper v9.15

videogame_asset

No ROM Loaded

Drop a ColecoVision ROM to begin analysis.

v8: MegaCart-aware (128K–1MB). Boot bank mapped to $8000 so banked carts (CVBasic/nanochess) now open & scan. Empty-bank detection.
v7: IX-table PUT_VRAM loops decoded. BIOS-range indirect skipped cleanly.
v6: TABLE_CODE/IY/A-aware, forward-disassembly tracer.
v5: VDP Viewer tab. v4: Custom VRAM routines, BIOS tracing, Pletter.

tv_off

Load a ROM to begin.
Drop a .rom file in the sidebar. Then run analysis and click From Analysis Results — or load the BIOS and click Start Emulator to play through to a frame, then Capture.

Live Emulator Frame 0

Composite Capture or Analysis · 256×192

From last Capture or From Analysis Results

Pattern Table 32×24 tiles

Base: $0000 · Mode: 2

Name Table 32×24 indices

Base: $1800

Sprite Attribute Table 32 sprites · 8×8 or 16×16

SAT: $1B00 · SPT: $3800 · Active: 0

Population Source

Include all sprite patterns from VRAM (not just on-screen sprites). Adds every unique 16×16 (or 8×8) pattern found in the SPT; unknown colors default to white.

"From Analysis" writes each detected VRAM block into virtual VRAM at its captured destination address, exactly as the game would at boot. Export This Screen saves exactly what is rendered above — tiles, colors, and layout — as a ready-to-edit Screen Builder project.

ROM Offset Explorer

Pat:$0000

Col:solid

NT :sequential

Scrub ROM offsets into Pattern, Color, and Nametable. Use for games that build graphics in RAM (e.g. Cosmic Avenger, DK Jr, Wonder Boy). Grid Overview shows 16 candidates at once — click any thumbnail to jump to that offset.

Render Mode

Mode 2 = 2 colors per 8 pixels, 3 banks. Mode 1 = 2 colors per 8 tiles, 1 bank.

VDP Registers

R0Mode

R1Mode/Int

R2NT base

R3CT base

R4PT base

R5SAT base

R6SPT base

R7Border

Capture

data_object

Load a ROM and click "Disassemble All Banks" to generate a full Z80 disassembly.
Works on any ROM — 32K or MegaCart (128K–1MB), all banks.

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