Recent content by ikamusume

Hi. I'm looking for "RMS3", one of the DECO Cassette System big stack modules. Hope to use this for MiSTer FPGA development. It looks like the one in the photo above. It doesn't matter to me if it works or not. The schematics of the small stack, -8 boards, are available on the internet, but...

This is a pretty old thread, but the chip itself looks interesting. I can't promise a deadline or whether it will be completed, but I just started with cell identification.

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You may have seen this CPU module with a PAL in games like Wonderboy or Sega Ninja. As some of the Sega System 1 games were encrypted and bootleggers made CPUs to decrypt them. Unfortunately, two of the components used in these modules are hard to find now, and they are (quite) large. I...

Hi. I'm looking for DEAD Sega CPU modules below: FD1089A: $5-15 FD1089B: $5-15 MC8123: $5-15 Want to purchase a module whose battery is dead or no longer functioning.

Outrun - PM sent

The phrase including "real machine" I mentioned is not a Nemesis/Konami GT board. It's a bubble system PCB. Here's a table of hardware differences between 3 PCBs Bubble System Revised ROM version of Bubble System Nemesis Konami GT 72 scanline counter(necessary hardware) O O X bubble...

Did you mean loading the bubble version or the revised ROM image on a Nemesis/RF2 board? Straightforwardly, it's impossible. I can't write much about hardware and program here. The first bubble versions run game program after loading the bootloader and some system routines used by 68000. They...

1. It's not related to the project you mentioned, but I was inspired by it. 2. There are four games released on the bubble platform. They are TwinBee, Gradius, RF2, and Galactic Warriors, and are all 2 megabit versions. Attack Rush is mistakenly known to have been released on that system...

My two-year project is coming to an end. It is a multi loader for Konami's bubble game that can emulate eight ROM images. Bubble memory's protocol itself is easy, but the production was delayed because I was programming diagnostics for the board. The resources are open, but it needs to be...

My bubble memory emulator project was completed successfully. It reads data from an onboard SPI flash and sends data to the controller in bubble memory protocol. Core modules consume ~450 LEs of an Altera Cyclone IV. I think this is quite light. Since the data structure of a bubble memory is at...

There was a request from people who has a dead Twin Cobra PCB within the Korean arcade community. Their common problem was a GXC-0x DSP that had been previously died. A custom numbered DSP is actually a TMS320C10, and its firmware can be executed externally by activating its microprocessor...

City Bomber uses a same VRAM board as the Bubble System. I'd like to make an FPGA replacement for six custom ASIC chips on there. It is difficult to hang logic analyzer probes on a Bubble System VRAM board because that is flipped.

OK... I've got a Bubble System motherboard from France. I know why the Japanese raise the market price even though it's already a ridiculous price, but the Bubble System PCB itself is very common. Someday the price will go down. However I'm still looking for a non-working Bubble System PCB and...