The NEC PC-9821 computers output a very unusual resolution that most western monitors struggle with: 640 x 400 @ 24 kHz. I tried at least half a dozen monitors of all types and ages and none of them was able to display a picture at all (except an “out of range” message). Video scalers like the DVDO iScan VP50 Pro don’t recognize the signal either. Some sources claim that the cheap GBS-8220 converter is able to convert the signal – that is only partially true. You can see a stuttering picture that eventually becomes clear when you start the Windows 98 Desktop, but that doesn’t work in DOS.
The other day I prepared my Atari Jaguar to build a rotary controller for Tempest 2000. I hadn’t used it in a while and accidently picked the wrong power supply – smoke was rising immediately from the console.
The culprit was easily found, chip U38 (MC34163DW):
Continue reading Atari Jaguar Power/Sound Fix and Rotary Controller
Found two more donor carts for use in a Sega Pico flash cart:
The Lion King: Adventures at Pride Rock and Magic Crayons, both “Assembled in Mexico”.
Continue reading Two Donor Carts for Sega Pico Flash
Now that I have an extra backup of my Mega CD save files on the Sega CD Ultra Backup RAM cart I can replace the battery of my the old CD BackUp RAM Cart without worrying about data loss.
It is possible to do an open heart surgery to prevent the memory from being erased and replace the battery while the Mega CD is turned on . I went for that procedure to avoid having to copy all files from one cart to another again.
Continue reading A new battery for the Sega CD BackUp RAM Cart
Two days ago Flavor of flashmasta.com anounced the pre-presale of a new WonderSwan flash cart: The WS Flash Masta.
For all Bandai WonderSwan owners this is exiting news as the flash/development carts for this system are very rare and expensive (e.g. the official WonderWitch or the WonderMagic Color).
To give you an idea what we can expect I’ll show you some carts he has made for the Neo Geo Pocket Color:
First there was the Neo Pocket FlashMasta and the Neo Pocket LinkMasta. I’ve used the Blue Version of the LinkMasta since 2011 and bought a new red 3D printed case for it last year.
Just recently my GD-ROM drive stopped reading Discs. It’s time to try something new: GDEMU
The original document suggested to use Sesame Street: Alphabet Avenue as donor cart and pointed out to use an „Assembled in Mexico“ cartridge. As you can see a regular US cartridge won’t do the trick.
Continue reading Sega Pico Flash Cart Tutorial
To replace the aged Lynx screen with a new LCD screen is no rocket science.
First you need an Atari Lynx II and the LCD screen kit by McWill.
Continue reading Atari Lynx II New LCD Screen, 5V Mod and Connection to Framemeister
Recently I found a CDI 220/00 with Mini MMC mainboard. It’s a heavy and bulky unit that contains lot of PCBs, wires, screws and metal parts. It’s one of the first consumer CD-i players, later models have all components on one single mainboard (Mono).
First you need a cheap donor cartridge with SRAM memory, e.g. World Cup USA ’94, and remove the mask ROM. If the battery cell is empty remove it too:
Continue reading Rent a Hero Translation for Sega Mega Drive