The Gamestar, a Mega Drive Clone!
In December 27 from 2021, I got this interesting box!



A Mega Drive Clone shipped from another city, I wanted one when I was 11, so I was thrilled! The box contains images of the Jurassic Park movie, the katakana "MEGA DRIVE" (メガ ドライブ) and phrase taken from the original JP box, a rather nice logo inspired by the original MD Logo (I like it very much =^▽^=), claims to have Street Fighter, whatever is happening on the bottom right of the white side; please fill me in on that because I'm confused and still am -_-; , and Captain Tsubasa, known here in the middle east as "Captain Majid".
This was tested in the store it was sold in (can't believe it was still here years later!), so its used, the box was full of shipping Stickers, I tried to remove them in the pictures above.
The box set contains the manual, the console unit, 2 Controllers (one being used and unwrapped), an AC adapter, an RF cable and an RF switch box, the AV cable was mysteriously missing.
The Console itself is an Asian PAL Model 1 Clone, running in Japanese 50HZ, mentions of Sega were removed there, along with the CH and EXT port.

The bottom sticker of the unit, which straight up says it's a "MEGA DRIVE", this sticker is the only one I've seen from it so far, may be from around 1995 from looking in the PCB and chip dates, I later found a french forum page that seems to have noted the Model it was based on. (HAA-2510)
www.gamopat-forum.com/t69034-megadrive-ou-pas
it almost took me an hour to set up the TV as I didn't know how RF worked at the time, I was met with a Multicart Menu, about 156 games in 1 (kind of; my calaculations might be wrong, teehee!), filled with the repeats of 7 games some of which alter the starting point, these are cycled through via bankswitching, how facinating.
The Multicart
NOTE: This Video was recorded months after the first time because I didn't have an Easycap and AV Cable!
List of games, all are modified in one way or another. -
- Jurassic Park - copyright info is removed including the Sega logo, thus leaving the T-Rex, it still roars out "SEGA!"
- Tecmo Cup Football - known here as "BOY SOCCER TEAM III", this is a notable entry, the original game happened to be a prototype that got spread around by pirates, one thing that affects my copy in particular is that it might've been faulty as some of the graphics are corrupted and the Z80 SMPS sound driver never functions, I'm unsure on if its the result of the title modification or a manufacturing error as I've once seen a lisitng of the same console with the game running fine.
- Street Smart - a port of the arcade title by SNK, the version seen here removes copyright info, thus removing the Sega splash screen as well, the credits are untouched however! presumably a hack of the japanese version.
- Osomatsu-Kun - Hachamecha Gekijou - the one of the infamous launch titles of the Mega Drive, notable here for being the default bank to run on and has some rather interesting hacking done within (primarily from playing my dump with friends); this pirate ROM has its padding data edited to contain the multicart code, with the pointer to the program init in the header modified to go the new initialization code, it happens to contain a TMSS check that Osomatsu originally lacked, meaning it can also play on late consoles, the SEGA and title screen game mode codes have been dummied out to immediately set to level mode (skipping the first title card in the process), the gameplay changes include infinite lives (suspecting they had the program code line for calling a game over jumped over to where nothing happens or is overwritten with a bunch of NOP code), and an indicator for special objects in the form of a 0 (one friend suspected it was debugging?!), it was rather interesting to play this version in a voice chat.
- Rambo III - immediately skips to action, most of the levels don't have a mission screen present.
- Shove It - skips to action like Rambo III, most repeats start on different rooms, presumably a hack of the japanese version.
- Alex Kidd: The Enchanted Castle - this also has the most interesting changes, it skips to level mode as it starts like Osomatsu-kun, the lifes system was hacked so that its infinite although you can cause a bug where getting an extra life and losing causes the game over screen to function and return to the same Level of the repeat you're playing (as a result of the first change), it cannot progress when passing a level, so you're basically stuck forever until you reset and go to the next AK repeat, a hack of the japanese version.
Dump Status - UNDUMPED
Dump Status - UNDUMPED, BAD ROM
Dump Status - DUMPED
Dump Status - DUMPED

A 0 next to Iyami that signifies a level up.

A mysterious 0 floating, its a... frog...?

A 0 near the door that signifies a room swtich.
Demonstration of the "Level Up!" block
Shoot those and they turn into doors!
Dump Status - DUMPED
Dump Status - DUMPED
Dump Status - UNDUMPED
Most of the titles are early 80s-90s titles, most of it has a weird feeling from how different they feel from late MD titles (right around from when games like sonic came), makes me a little nostalgic despite not even being born until decades later!
Disassembly








Seems to be a VA5 Clone, specifically a 504-II, with two PCBs connected together, split presumably for cost cutting, it notably has a whole second cartridge slot in the bottom side of the main PCB, the multicart PCB was actually stuck onto the board with sticky double sided thick tape.
Below are a table of chips I can identify, thanks for UNAUTHORIZON for indentifying a few unlabled chips, they are hosting more PCB images I took
- Motorla MC68000 - A genuine chip, MMC68HC00OP10 2E60R DJQVT 9507 (1995 February 13-19)
- Zilog Z80 - A genuine chip, Z0840004PSC 9017 HJ (1990 April 23-29)
- PCS8391 - A clone of of the SEGA 315-5313 (VDP), no other info.
- PCS8492 - Another clone of of the SEGA 315-5313???? (VDP), no other info.
- PCS8593 - A YM2612 Clone, no other info.
- GoldStar GD4066B - A Quad Bilateral Switch??? Not sure on its purpose, 9503 (1995 January 16-22)
- Winbond W24257AKDV - M68K RAM, 94461
- An unlabled chip, Z80 RAM.
- 2x Hitachi HM53462P-12 - VRAM, JAPAN 8717 R2002990 (1987 April 20-26) - JAPAN 8806 R3002990 (1988 February 8-14)
- 2x Motorola MCT7805CT - Voltage Regulators, MC T7805CT QFV447
- GoldStar GL324 - An Audio Amplifier, 9513 (1995 March 27-April 2)
Accessory Support
A notable thing about how this console is built is that despite having the expansion connector for a Mega CD, it went unused and blocked permanently by the shell.
It might support the 32X
Only thing to mind is ensuring they are the right region, there are official asian PAL MD products but they unfortunately rare and very expensive nowadays D:, so modding is the way to go.
Aftermath
As of writing, the console is sort of on its last legs, unfortunately has shell damage and broken pins on the board connector that need resoldering, most of the accessories like the original controllers and AC broken, my fault! u-u;
It desperately needs the board connector fixed, which would be an issue to service as they are header pin connectors! UmU;
That's all I have on documenting this neat old-school MD bootleg, bye! ^▽^
