My partners beloved Commodore 64 switched on and managed to load games via a multicart but I couldn’t get any sound output.
After a short Internet search, I found many articles suggesting the SID chip would probably be faulty. This chip is the sound synthesizer for the C64. The diagnostic cart test showed some errors and when it got to the sound test, again there was no sound output.
The case opens after removing three screws along the bottom of the case.
This is the faulty SID chip on the motherboard.
This is the new 6581 SID chip that I ordered from Etsy for just under £38.
The diagnostic cart still shows errors but the sound now works.
This is the multicart with a selection of games to play.
Looking at the list of games on the multicart:
Playing Astroblitz from the multicart:
This is another retro console i’m testing from my collection. Its a bit rough but still works. It has a missile command games ROM fitted. The Microvitec Cub monitor still works well but the Cumana disk drive doesn’t seem to want to read disks at the moment. It shows Fault 18 at 0/0 when trying to read a 5.25″ disk.
In the video below, you can see me testing the Missing Command game really badly. Think I need a joystick. Using the cursor keys is fiddly.
This is another project. I purchased this kit from Ebay and it dates around 1986 and would be used with an original BBC Microcomputer to interface it with Lego motors and sensors. The kits are fairly easy to get hold of and Ebay still sells sensors and motors but the kit has no software and/or instructions.
I have a BBC Micro but need to get hold of the software. There are some Lego fan sites with at least one selling the software but for £400+.
I spoke with Lego who cant help me and have just emailed someone at the Centre for Computing History who apparently have a complete kit in storage box 130. I’m hoping they can help me with copies/code examples/instructions etc as it would be nice to get this old kit working again.
Once working with the BBC, I would also like to see if its possible to get it working with something more modern like a raspberry Pi.
Lets see what their response is……
15th September – No email response from the Centre for Computing History but today we attended their annual Retro Computer Festival and chatted with some of the volunteers. One chap managed to locate the software disc I need and is going to copy it and se me a copy in the post. Lets see if it arrives?
About three weeks ago I bought a log flume from a seller on Ebay. It was definitely an impulse buy. The auction was due to end one evening and I put in a cheeky bid expecting it to be declined and woke up the next day to find I was the new owner of a used log flume for £120.
When I told my colleague at work he also temporarily lost his sanity and bought a roller coaster car from the same seller based in Margate. These things really don’t come up for sale very often and we both felt we could create some crazy projects around VR using these.
After some difficult communication with the seller, we finally departed Slough on Sunday at 8.00am to drive the 100+ miles to Margate to collect both items.
It was a cold day with snow on the ground but we made good time and arrived around 10.30am in my colleagues van. The seller was still on holiday in the U.S but his colleagues were on hand to show us the items. It immediately became clear these were very large and very heavy requiring 4 or more people to lift and there were two of us. After an hour and half of lifting, winches, ratchet straps and to be honest Chris’s lifting ability more than mine, we managed to get the rollercoaster in the back of the van and turned our attention to the log flume. It was quickly obvious the log flume was too big and heavy to fit in the van with the rollercoaster. I remembered the seller was also offering some smaller log flumes for the same value and after a quick discussion it was agreed we would take one of these instead and again loaded in the van after some time and effort.
By this point it was early afternoon. Chris’s van has no heating and after loading these items we were cold and thirsty. We were told of an indoor market called the Old Kent Market where we could get some refreshments and walked around the corner to see what they had to offer. Its a fantastic little indoor market with lots of character offering food and beverages and some small indoor market stalls. We had a lovely coffee and warmed up then visited a couple of the antique shops nearby before making the 2 hour journey home in the fresh snow.
The last picture shows my log flume hidden in our server room at work after loading into the lift and taking it up to the first floor.
We had an early morning start, driving down to Eastleigh near Southampton. We left at 7.00am and arrived about 8.30am to collect an Ebay purchase.
Last weekend, I took a punt on buying a Dragon 32 computer with accessories. The listing said it had not been tested but was working when put away in the loft. I managed to buy it for £21 but the seller would only allow collection. Normally I would shy away from these but the price was good and so I decided to take a chance as I don’t have one of these in my collection.
6 X C15 cassette tapes, Mined-out, Dragon Selection 2, Cave Fighter, Examples from manual, Personal Finance, Keys of the Wizard, Leggit cassette games, Meteroids cartridge game, Home Computer Weekly No 43 Jan 3-9, 1984 Magazine, Computer & Video Games January 1984 Magazine, Dragon User December 1983 Magazine, Dragon World No 3 April 1984, Dragon User November 1983 Magazine, Dragon User January 1984 Magazine, Dragon 32 computer, Joysticks.