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Victor Wondermega RG-M1

The Wondermega is an all-in-one Mega Drive, Mega-CD and Mega-CD Karaoke solution developed by Victor under license from SEGA. Originally released on the 1st of April 1992, this deluxe system features a multitude of video-out options; with RF, S-Video and composite all being available as standard. The system also comes with enhanced audio capabilities with the inclusion of a digital signal processor, a MIDI output and 2 microphone inputs made for karaoke capabilities. Despite featuring a top-loading CD tray, the mechanism is still motorised and the tray as adorned with multiple LEDs which illuminate when the system is in use. The additional functionality of the digital signal processor is controlled with an extra series of buttons on the right-hand side of the unit, and a front control panel for the karaoke functionality is hidden behind a retractable door on the front of the unit. SEGA would release their own first party variant of the system later in April 1992 and the system would be superceded by the Wondermega M2 and X’Eye in 1993 and 1994 respectively. The Wondermega also runs its own proprietary v1.00 system BIOS which features Wondermega branding on the boot screen. It is based on the original 1991 Japanese Mega-CD system BIOS.


Motorola 68000 @ 12.5 MHz
Motorola 68000 @ 7.67 MHz
Zilog Z80A @ 3.58 MHz

Progressive: 320×224, 256×224 (NTSC) or 320×240, 256×240 (PAL) pixels, 512 color palette, 61 colors on-screen
Interlaced: 320×448, 256×448 (NTSC) or 320×480, 256×480 (PAL)

Ricoh RF5C164
Yamaha YM2612
Texas Instruments SN76489
MIDI Output
Digital Signal Processor

72 kB of RAM (Mega Drive portion)
64 kB of video RAM (Mega Drive portion)
6 Mbit (Mega-CD portion)
512 Kbit to PCM waveform memory (Mega-CD portion)
128 Kbit to CD-ROM data cache memory (Mega-CD portion)
64 Kbit are allocated as the backup memory (Mega-CD portion)

CD-ROM discs
CD+G discs
ROM cartridges


Photo credits to Phatnightmares, Yi-Hun Jang and rllmuk forums

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