Here’s the little Game Gear prior to repair. As you can see from the above it has very quiet sound and no video, overall not bad condition on the inside of the unit. I hope to replace the capacitors inside … Continue reading
Great news, the co-processor for the 486SLC CPU has arrived and is recognised perfectly. It is an ULSI Advanced Math Coprocessor SX/SLC rated at 33MHz. Code US83S87. Also detected as an ULSI ULSI 84×87
I’ve been able to run MEMTEST … Continue reading
The new motherboard went in and POST passed OK, hard drives were recognised perfectly. Sadly this indicates that the 386 board that was originally in the machine has an issue with the hard drive controller on the motherboard. It will … Continue reading
Picked this up on eBay from the UK and have given it a bit of a clean out. It has become my favourite Mega Drive controller now. The insides are equal to another Mega Drive controller I cleaned out yesterday … Continue reading
Here’s how to replicate the fault:
– Run the Saturn for an hour or more so it becomes nice and toasty. I found that the music player was more than sufficient to do this.
– Next disassemble the Saturn apart … Continue reading
An Amstrad Mega PC overview. A Sega Mega Drive ISA card is installed. Arrived in not-so-good condition with corrosion from the NiCad battery.… Continue reading
Or more specifically co-processors for the Amstrad Mega PC or Amstrad Mega Plus PC.
387SX co-processors pair up with either the 386SX or the 486SLC. You cannot install a DX type co-processor with an SX chip. I ended up with … Continue reading
Just a quick demo to show the Mega Drive and 386SX PC sections are functioning as well as can be expected for their age.
Above is a video of the Amstrad Mega PC with the original monitor connected.… Continue reading
Browsing the internet I came across an Amstrad PC7486SLC motherboard. I couldn’t help but notice the striking similarity with the Amstrad Mega PC motherboard. And with all my issues with hard drive controllers on the Mega PC, I figured it … Continue reading
Such a wonderful shade of blue. Unfortunate that it has eaten the tracks on the motherboard. That’s the power of NiCad battery acid though.
Cleaned it up as best as it could be cleaned with some isopropyl alcohol then mapped … Continue reading