PhilCs blog / the latest things hes broken(fixed)

Blogs & guides and tales of woo by forum members.
User avatar
JezC
Posts: 2156
Joined: Mon Aug 28, 2017 11:44 pm

Re: PhilCs blog / the latest things hes broken(fixed)

Post by JezC »

@PhilC Do you have a write-up on using the BluesSCSI boards with Ataris or Amigas?

I'm considering options for networking some of my retro machines but need the cart port free for dongles...
User avatar
mrbombermillzy
Posts: 1494
Joined: Sun Jun 03, 2018 7:37 pm

Re: PhilCs blog / the latest things hes broken(fixed)

Post by mrbombermillzy »

I never even knew those Open 128 boards existed @PhilC .

I am doing very well resisting the temptation of getting a C128... well, until we get that 'other' project running properly, anyway! ;)
User avatar
PhilC
Moderator
Moderator
Posts: 6049
Joined: Fri Mar 23, 2018 8:22 pm

Re: PhilCs blog / the latest things hes broken(fixed)

Post by PhilC »

mrbombermillzy wrote: Sun Dec 24, 2023 4:38 pm I never even knew those Open 128 boards existed @PhilC .

I am doing very well resisting the temptation of getting a C128... well, until we get that 'other' project running properly, anyway! ;)
Maybe try one of these boards @mrbombermillzy? I have a couple of C128s that I picked up (non functional) and will transfer it all over to these new boards, as corrosion is a big thing with C128 boards.
If it ain't broke, test it to Destruction.
User avatar
PhilC
Moderator
Moderator
Posts: 6049
Joined: Fri Mar 23, 2018 8:22 pm

Re: PhilCs blog / the latest things hes broken(fixed)

Post by PhilC »

Done a bit more with the Open128 today, mainly to see what parts I need to order to complete it.

I’m fine for resistors and caps, the sockets are all on their way and I have all the logic chips I need to get it finished. Just a few inductors and a whole load of emi filter’s required and they ain’t cheap, so will likely pinch them from a donor board as well.
IMG_2993.jpeg
IMG_2993.jpeg (756.21 KiB) Viewed 3873 times
If it ain't broke, test it to Destruction.
User avatar
PhilC
Moderator
Moderator
Posts: 6049
Joined: Fri Mar 23, 2018 8:22 pm

Re: PhilCs blog / the latest things hes broken(fixed)

Post by PhilC »

Done a little more to the Open128 board that’s now destined for the C128D. The sockets have arrived, some how the Chinese sender mixed up my order, so I now have 200 or so 14 pin sockets, 100 odd 8 pin sockets and 100 16 pin sockets. I’d actually only ordered 100 14 & 16 pin ones but not going to complain.

So whilst I wait for things like a few new logic chips and the suppressor caps for the keyboard and joysticks, I’ve decided I would add a few nice upgrades to the board.

So far it’s got an S-Video and stereo jack board fitted instead of the standard modulator, a modern 8701 clock chip replacement (the Tolb 1.2) and a ram replacement in the shape of a SaRuMan-128. This has meant I’ve not needed to spend the time fitting 16 sockets and decoupling caps just for the ram.

Once it’s all ready to go into the C128D it’s going to have stereo SID board fitted and a C128Lumafix. It’s already had the VDC ram upgrade fitted by fitting two 41464 ram chips instead of the 4416 standard ones.

Hopefully once all this is done it will mean so have a nice reliable C128D going forward (famous last words!)

Anyway , here’s the pics.
IMG_3001.jpeg
IMG_3001.jpeg (600.86 KiB) Viewed 668 times
IMG_3004.jpeg
IMG_3004.jpeg (1005.37 KiB) Viewed 668 times
If it ain't broke, test it to Destruction.
User avatar
rubber_jonnie
Site Admin
Site Admin
Posts: 10867
Joined: Thu Aug 17, 2017 7:40 pm
Location: Essex
Contact:

Re: PhilCs blog / the latest things hes broken(fixed)

Post by rubber_jonnie »

Looking interesting :)
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
User avatar
HigashiJun
Posts: 1286
Joined: Fri Jun 19, 2020 7:21 am
Location: Tokyo

Re: PhilCs blog / the latest things hes broken(fixed)

Post by HigashiJun »

Love that purple !

8-)
User avatar
PhilC
Moderator
Moderator
Posts: 6049
Joined: Fri Mar 23, 2018 8:22 pm

Re: PhilCs blog / the latest things hes broken(fixed)

Post by PhilC »

HigashiJun wrote: Tue Jan 16, 2024 7:38 am Love that purple !

8-)
Yes it’s great that they make PCBs in my favourite colour.
If it ain't broke, test it to Destruction.
User avatar
PhilC
Moderator
Moderator
Posts: 6049
Joined: Fri Mar 23, 2018 8:22 pm

Re: PhilCs blog / the latest things hes broken(fixed)

Post by PhilC »

Having a bit of a sort through some of my unfinished projects and here we have a C64 Breadbin motherboard. I’d recently replaced the ram and the 74LS257s and it now boots but I think maybe it’s got a bit confused colour wise :lol:
image.jpg
image.jpg (412.96 KiB) Viewed 620 times
Right, which bit do I desolder next?
image.jpg
image.jpg (360.31 KiB) Viewed 620 times
If it ain't broke, test it to Destruction.
User avatar
PhilC
Moderator
Moderator
Posts: 6049
Joined: Fri Mar 23, 2018 8:22 pm

Re: PhilCs blog / the latest things hes broken(fixed)

Post by PhilC »

So was it the Character Rom? Nope Was it the PLA? Actually partly, was it the Screen Ram? Nope, Was it U14 previously changed by someone else? Most definately. This was I believe a MOS 7709 (74LS258) 2 to 1 line data selector, so one of the lines wasn't swapping over, giving me garbled text on the screen but otherwise working.

The random colours were thanks to the failing PLA.
If it ain't broke, test it to Destruction.
Post Reply

Return to “MEMBER BLOGS”