Philips CDI470 32 KB NVRAM Upgrade

Some time ago, I noticed that the service manuals of most Mono II – IV boards have notes about 8 and 32 KB NVRAM types, to be set by jumpers and resistors. I never attempted to do that upgrade because most of my CD-i players feature 32 KB NVRAM or have older mainboards that cannot be upgraded. When I mentioned the possibility in this article, CD-i Fan warned me about the consequences: If device driver and descriptor in the ROM don’t support the extra RAM, then the player might not recognize it and lose the real-time clock – or it won’t work at all.

Why would you want to upgrade the NVRAM anyways?
For example, the save files of The 7th Guest, Lost Eden and Burn:Cycle already take up a lot of space. Add some more games and settings, and you will soon reach the critical limit of 97-98% where the player refuses to start.

CD-i memory full (8 KB)
CD-i memory full (8 KB)
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Philips CDI470 Diagnosis and Repair

For upcoming experiments, I was in need of a working CD-i player with a Mono IV mainboard and 8 KB of NVRAM. I checked my basement and found a broken CDI470/20 that had been sitting there for years. Previous repair attempts had failed and I hadn’t bothered to look at it since.

Upon the first start, it greeted me with the memory full error:

CD-i memory full error
CD-i memory full error
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NEC PC-FX Mouse (FX-MOU) Repair

When taking new screenshots for my old PC-FX articles, I noticed that my PC-FX mouse (FX-MOU) didn’t work properly anymore. It still detected the movement fine, but if failed to register one of the mouse buttons. My spare mouse turned out to suffer from this too.

It’s time for a quick repair. Two screws underneath the label hold the mouse together (marked with yellow circles).

NEC PC-FX Mouse (FX-MOU)
NEC PC-FX Mouse (FX-MOU)
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Serial Terminal on Psion Serie 5mx Pro

This is a follow-up to the Serial Terminal on Atari Portfolio article. The Portfolio with the Serial Interface add-on turned out to be too limited and bulky for being a mobile VT100 terminal, and I actually never used it. For years, I was looking for an even smaller alternative and have finally found it: The Psion Serie 5mx Pro. It is basically a Psion Series 5mx (or Ericsson MC218) for the German market. The operating system (EPOC32 Release 5) of this model is not stored in ROM, but instead it is loaded from the CF card into RAM on the first start. An English version of the operating system file (sys$rom.bin) can be found here.

Psion Serie 5mx Pro and Philips CDI470
Psion Serie 5mx Pro and Philips CDI470
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Pippin Atmark ADB Adapter Dongles

Initially, I was planning to replace the P-ADB connector of my AppleJack controller with an ADB plug (Mini-DIN-4). The remaining P-ADB plug attached to a Mini-DIN-4 socket would then become an ADB adapter dongle.
But why would I destroy the cable of my only controller? According to the documentation, which can be found here and here (in a very low resolution, unfortunately), a “Hosiden HGC0492-01-010 or equivalent” connector is needed. And that connector is impossible to find.

To get started, I created a new schematic based on the available documentation:

Pippin-Apple Desktop Bus pinout
Pippin-Apple Desktop Bus pinout
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Formac ProFormance 3 Plus Fan

This is a quick fix for my Apple Power Macintosh 7500/100. It doesn’t have its own article yet and has only been mentioned a couple of times. This article also isn’t about the Power Macintosh itself, but about the graphics accelerator that the previous owner had built in. The Formac ProFormance 3 Plus was advertised as “The Fastest Graphics Accelerator for your Mac” in 1999. This is the best version of ProFormance 3 with 300 MHz pixel frequency and 32 MB SGRAM (PNGA94-5).

Formac ProFormance 3 Plus 32MB
Formac ProFormance 3 Plus 32MB
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Philips CDI660 Mono IV NVRAM and 60 Hz Modification

The CDI660/00 is one of the last professional CD-i players by Philips. The mainboard, Mono IV, is also used in various consumer players. So far, there are no tutorials for 60 Hz modification. When this topic came up in the community on The world of CD-i, I looked it up in the CDI220/80 service manual (also Mono IV, with plenty of remarks for other player models) and attempted the modification myself. It has been on my to-do list for quite some years now.
First, we need full access to mainboard. Remove the marked screw of the DVC plastic holder.

CDI660 inside
CDI660 inside
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Pippin Atmark Floppy Adapter

A floppy disk drive for to the Pippin Atmark is nothing new. In fact, an expansion dock called Pippin Atmark Floppy Unit was released back in the days. These units are incredibly rare and I was never able to get ahold of one of them. Apart from an Apple floppy disk drive with 20-pin ribbon cable, these units contained no additional hardware but a simple X-PCI adapter board. It didn’t take long until Japanese enthusiasts tried to replicate these adapters. When I recently rediscovered my Pippin Atmark PA-82001-S, I also looked around for additional hardware. I found this article about an adapter board that had been finally replicated two years ago. This board can still be ordered from OSH Park.

Pippin Atmark Floppy Adapter
Pippin Atmark Floppy Adapter
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Capcom CPS2 Digital AV and I/O Interfaces

After finishing the repairs on my CPS2 in April, I had already some more additions in mind:

I had already ordered the digital AV interface kit from VideoGamePerfection.com in the beginning of the year and was only waiting for the I/O interface to get started. Last month, it finally arrived. Also on the picture: a home-made kick harness and a RG174 coaxial cable.

Capcom CPS2 digital AV and I/O interfaces
Capcom CPS2 digital AV and I/O interfaces
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Pippin Atmark PA-82001-S External SCSI and ROM Dump

Earlier this month, I wrote about my Pippin Atmark PA-82001-S Monitoring Unit. Initially, I didn’t plan to do any modifications to this special Pippin model. But then Keith Kaisershot told me that it is possible to feed a long SCSI cable over the metal lips of the case without doing any permanent modification. He also asked me to verify the checksum of the ROM. In this article, I will add external SCSI to my Pippin and also dump the ROM.

Apple/Bandai Pippin Atmark PA-82001-S external SCSI
Apple/Bandai Pippin Atmark PA-82001-S external SCSI
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