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Re: General Stuff(tm)
Posted: 14 Jan 2024 17:52
by rubber_jonnie
stephen_usher wrote: 14 Jan 2024 17:02
A combination of myself (finding out that the Computer One OPD floppy interface blindly writes a string held in the ROM to the boot sector) along with Jobdone (from the QL Forum & Discord, who found the correct BPB parameters and hex edited the ROM) have got the One Per Desk now formatting floppies that the ST and MSDOS can reliably read and write to.
This should facilitate the use of more able machines to create content for the OPD to use/run.
Here's a text file copied onto an OPD formatted floppy and then imported into the Quill word processor.
IMG_3536.jpeg
And the ST reading the OPD formatted floppy.
IMG_3535.jpeg
Good progress, though I've not done a number of things I planned to today. But I did manage to fit new "rubber" feet on the Mega ST after scraping out the hardened remains of the originals.
Good work sir :)
Re: General Stuff(tm)
Posted: 15 Jan 2024 04:44
by HigashiJun
Looks good !
Re: General Stuff(tm)
Posted: 15 Jan 2024 21:02
by stephen_usher
@rubber_jonnie oops, I seem to have accidentally made a working OPD floppy interface for you. ;-)
IMG_3537.jpeg
I'll get it in the post in the next few days.
Re: General Stuff(tm)
Posted: 15 Jan 2024 22:07
by stephen_usher
Fixed the right shift key on the OPD using one of the Atari domes that rubber_jonnie sent.
Impossible to get it into the groove where the original dome sat so had to open out the groove and use epoxy resin to stick the dome into the correct location. Works fine anyway.
Re: General Stuff(tm)
Posted: 15 Jan 2024 23:35
by rubber_jonnie
stephen_usher wrote: 15 Jan 2024 21:02
@rubber_jonnie oops, I seem to have accidentally made a working OPD floppy interface for you. ;-)
IMG_3537.jpeg
I'll get it in the post in the next few days.
That is very kind of you sir!!
You must let me know what I owe you.
Re: General Stuff(tm)
Posted: 16 Jan 2024 08:09
by stephen_usher
Don't worry about it, the PCB would be scrap otherwise and other than a few TTL chips, a cheap EEPROM and a connector I got the rest for free from Paul Vernon's cache of stuff. (I even found four VL1772 chips in there.)
Re: General Stuff(tm)
Posted: 16 Jan 2024 09:05
by rubber_jonnie
stephen_usher wrote: 16 Jan 2024 08:09
Don't worry about it, the PCB would be scrap otherwise and other than a few TTL chips, a cheap EEPROM and a connector I got the rest for free from Paul Vernon's cache of stuff. (I even found four VL1772 chips in there.)
As long as you're sure :)
Thank you.
Re: General Stuff(tm)
Posted: 16 Jan 2024 21:24
by stephen_usher
Recently my Panasonic BluRay/Freesat box has not been able to pick up satellite channels.
My first thought was, "It's a capacitor."
Tonight I opened it up and... it's a capacitor. One very domed 330uF 6.7V capacitor with an orange blob on the top (knocked off before the photo). After extracting and testing it, the tester can't even see it's there, which means that it has no capacitance at all.
IMG_3538.jpeg
IMG_3540.jpeg
I fitted a replacement (50V) one and the box works perfectly.
Panasonic didn't even fit their own make of capacitor, instead using Elna ones which are the bane of Sony and Apple power supplies.
Re: General Stuff(tm)
Posted: 16 Jan 2024 21:45
by rubber_jonnie
Damn capacitors!
Re: General Stuff(tm)
Posted: 16 Jan 2024 21:49
by PhilC
I had a whole bunch of 10uf caps on that C64 motherboard that were short circuit. One would fail, then the next and so on until I’d got fed up and replaced them all.