Preserve the Bubble!

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Current Status
Game Version Cartridge S/N Hardware Patches Dump Date Cartridge Status Dump Status Note
TwinBee Rev.A(early) 33
TwinBee Rev.B(late) 33 No Aug. 25, 2019 Data corrupted Working Data fixed
Gradius Rev.A(early) 33 Yes ? Not dumped
Gradius Rev.B(mid)
Gradius Rev.C(late) 77 Yes Aug. 31, 2019 Working Working
Konami RF2 Rev.A 88 Yes Jul. 19, 2020 Working Working Repaired
Galactic Warriors Rev.A 88 Yes Mar. 11, 2020 Working Working

Versions

TwinBee Rev.A is early version. It has different interrupt priority. VBLANK and 256V(odd/even) had been swapped. No jumpers around 74LS147.

TwinBee Rev.B is late, final version. Identical to later ROM version except 2kB of code.


Gradius Rev.A is early version, S/N usually starts with 33 or 77. There is 6 stage bug.

Gradius Rev.B is mid version, S/N usually starts 88. There is an unknown bug, NOT VERIFIED.

Gradius Rev.C is late, final version. Usually comes from a 7F motherboard. S/N is not related. Identical to later ROM version except 2kB of code. Bug fixed.

There is a possibility that there are more versions.


Konami RF2 Rev.A, there is only one version. S/N starts with 88. Identical to later ROM version except 2kB of code. NOT VERIFIED.


Galactic Warriors Rev.A, there is only one version. S/N starts with 88. Identical to later ROM version except 2kB of code.

Work Log

Aug. 25, 2019 - TwinBee Rev.B has been dumped from a ROM BAD cartridge. I fixed the dump.

Aug. 31, 2019 - Gradius Rev.C has been hand-crafted from a known Gradius dump. Works well.

Sep. 20, 2019 - I got a Bubble System motherboard with a Konami RF2 cartridge. A tantalum capacitor has been shorted. Under repair.

Mar. 11, 2020 - Galactic Warriors: the RAREST game on Bubble System has been dumped from a working cartridge.

Apr. 02, 2020 - I got a Bubble System motherboard with a Gradius cartridge. Not tested.

Jul. 19, 2020 - Konami RF2 has been repaired! Checked MB466 coil drivers and replaced several tantalum capacitors with ceramic one. Data alive. Now it's working!