Part 1 - ruclips.net/video/XBQJHqbnVco/видео.html Part 2 - ruclips.net/video/UyQ8ROnTrg0/видео.html Part 3 - ruclips.net/video/IY1eqRxM48s/видео.html Not sure why some of the title music vanished there when outputting... Always something wrong with my vids lol :o) Here's the link to the video which talks about building the BBC - from a key person who worked at Acorn:- ruclips.net/video/y4WG549i3YY/видео.html
GadgetUK164 - Retro Gaming Repairs & Mods Oh, btw, I still have a Merlin Tonto here which has the different type of speech ROM in it. I wonder if anyone has dumped the ROM yet, as it could then be used by anyone on a Beeb (using that TMS ROM emu project thingy)?
Haha i started watching this video 3 or 4 hours ago & got as far as 40mins, then paused to look up Ad meliorum (not knowing that you were about to explain!) and ended up off on a tangent looking into US Marine slang then on to DIY automotive ECU kits/programming and finally back here! The slogan certainly is apt for Acorn too, from little acorns grow well not so much mighty oaks but mighty ARMs lol
8:48 The solder pins on those switches form part of the contact. You can (gently) pull and twist them out with a pair of pliers, clean them and push them back in. It's not a guarantee they will work when they are re-soldered as there's another part that you can't get to, but it's worth a punt.
Intermittant keyboard switches are common on a beeb that hasn't been used for a number of years. The usual fix is just to tap vigoursly for a minute. If that doesn't work, you can desolder and "unscrew" (pull as much as unscrew) one leg, clean it and replace before repeating with the other leg - don't remove both at once! Great repair to the case. Thanks for the mention, sorry you spent so much time debugging an EPROM that you may not have even tried without my trouble shooting chip!
Thanks =D Don't worry about that problem with the chip - not your fault at all lol! If there's one thing I've found over the years of doing my channel - Whatever I buy 'new', always causes me problems that others don't have. I've had it so many times its incredible lol, but it gives me more video content so I am happy lol. A good example is on the next video - boobip.com chips came with wires to clip on, and wires to join chips together. They look perfect - but there was a problem as you will see! And it's incredibly hard to believe lol.
i loved podd, when i was in junior school one of my 4th year teachers took a hex editor to podd just to find out what he can do, loved it when podd and explode/implode
Oh dear, mentioning pulling things out with thin strands and mentioning the D, I can smell parody #2 lol. It's a shame you can't fit a larger fan horizontally, say a decent large and thin 120mm Papst or Noctua. If it were me, I'd experiment using one of the of the motherboard screw placements to anchor one corner of said fan type and some rubber feet for the other 3 corners, it'd save on noise and create a lot more turbulence. But, it's not me nor my machine. This Beeb has found a great owner, I am sure it's loving the lime light of late! Looking forward to episode minus 2 lol. Cheers for the entertainment Gadge.
I nearly spat out my drink with laughter when the sirens were going off and you said "oh f*ck off" and the caption you wrote had me stitches! "Police coming to get me for my bad videos!" :)
The audio mod should really come from PL16 and fit a switch to kill the internal speaker, the sound quality of PL16 is much better than from the loudspeaker output on PL15. Regarding the temperatures inside the computer, they reach around 75C when the ambient temperature is 30C, it doesn't need cooling, as the higher temperature means faster heat loss. Unlike the Ferranti ULA in the Sinclair Spectrum, the BBC has enough space above to allow the heat to escape. The most common failure is the power supply and the hotter that runs, the shorter its life (electrolytic capacitors leak and dry out) this in turn puts more stress on the components, heating them further. A good mod to do (without needing lots of fans and heatsinks) is to put a fan in the grille of the power supply and run a wire to a spare V2 pad (12V) it will have to be a slimline fan. This would prolong the life of the PSU and reduce the fear of logic chips reaching their danger point of 140C (yeah, we're a long, long way from that level - these aren't nVidia/AMD flipchips that are soldered into another package - XBox360 Red Ring of Death, MacBook Pro 2012 et.c. that die at 105C) Unfortunately, at some point the design was changed to restrict the vents on the underside and the vents on the lid - I guess kids were poking things through the holes and the computer doesn't like that much 😆 It looks like you're having fun with it, maybe try the 1MHz Pi projects like HDD, Teletext, Music 5000 (synth) and there's a good Pi Econet Server project underway that works well (as you've got an Econet interface)
Friday night is becoming a regular "gadget-athon" for me :) .... btw you can do "*." as a quick way to do a catalogue. In fact most things can be shortened so "*disc" is "*d.", "*help" is "*h." etc
I think ST stopped making EPROMs in 2011/12 so any EPROM you buy off ebay with a date code after 2012 has definately been rebadged. You can use paint stripper to reveal the real speed of the EPROM. Most 10F1s are really 12F1s or 15F1s. I bought a bunch of AMD flash chips from ebay and not one of them was manufacted by AMD, they were all Macronix rebadged.
Yeah it's funny in vintage computers where you have absolutely no heat distribution to speak of with things running as hot as they do. That's idiotic those people complaining about adding heat sinks & fans after the fact, no company ever has any concern about the lifespan of hardware beyond the time period they can make money from it, period. O_o??? 33:26 ^_^
Yes, you're right! And I know I've moaned about this a number of times before, but I think its important to get across to people that still don't think temperature is a factor.
I wonder if you could load the PODD image into a hex editor and get all the words he knows? Or that might be classed as cheating! Can see would have been fun back in the day though.
Regarding the heatsink commenters... Commodore never specified heatsinks for their chips because they wouldn't have stretched the budget to include them!! I remember Podd from school as well but I forgot how creepy looking he was... I know as late as 2002 a chemistry teacher at my old school still used to haul out a BBC to show a photosynthesis program, because nothing else had bettered it!
Yes, you're correct with regards to heat sinks! Cost was often a key factor. That was why they ended up just using the RF shield as an extended heat sink, although that made things worse imo. LOL @ teacher using beeb still in 2002 - I can understand that! Lots of educational stuff seems to be lacking modern updates.
Yes, it should have a label or something to protect it! But that wasn't the issue! Originally it had a sticker over it - wasn't working, yet it compared byte for byte identical to the image file. I took it off to reprogram it a second time - same issue =/
The BBC computer was produced in 1981 - primarily for the BBC (British Broadcasting Corporation), and the BBC pushed it to schools as part of an educational project. So many schools, colleges and universities in the UK used them. Acorn also sold them to some businesses and home users too. Most popular in the UK, but some made there way to europe and other parts of the world too.
I was toying with the idea ages ago of a top 10 for every 80's/90's retro console and a write up on each game with tips and guides etc. but I never found the time either, I hit 40 and just want to sit on my arse drink a beer and mess around on here where time permits.
Maybe if I get a mate involved, trouble is they are all lazier than me, maybe just do a top 10 SNES, AMIGA and MEGADRIVE, that would be less time consuming, and a full page on each game, I'll do it in a scrap book first, but don't hold your breath, something more important always gets in the way of any hobby or project I start, which is why I keep my videos short and never have a set date for when one will be posted, I've had a Cannon Fodder GBC vid' on my desk for a while it needs a quick edit, I might get that done over the next 2 days.
You're correct in assuming that your IR thermometer is reading too low. The emissivity coefficient of shiny copper is vastly lower than that of most surfaces. Emissivity coefficient table: www.engineeringtoolbox.com/emissivity-coefficients-d_447.html How to adjust the emissivity coefficient on 'your' IR thermometer (maybe - hope chipset is the same): ruclips.net/video/J1CMrz7LOOI/видео.html
Thanks!!! That's great info! Unfortunately mine doesn't seem to be configurable like that one in the video (despite having same part number). I suspect mine is a clone =/
I just noticed that your 'clone' doesn't actually have the segments present on the display. Since you can't change the emissivity setting of the measuring instrument, change the emissivity of that which is being measured instead. Some black electrical tape on the side of a heatsink should be a big enough target, given a bit of gun waving to find the hot spot.
Thunderf00t shows a good example of the effect of tape under an IR camera (and it's not even a dark coloured tape). ruclips.net/video/wNHcIYyYDhU/видео.html
Podd needs some fibre in his diet... Hahahahahahaha... It was my last year at primary school when the BBC came out. So it was all new, it had a cassette player (no disc drive) and some software that when you entered a barcode from food like crisps etc, it told you calories and salt and nutrition values. That was magic to us.. our teacher Mr Peerman was learning basic as we did. It really was a brave new world.
GadgetUK164 - Retro Gaming Repairs & Mods the disc drive came just before we left, 5 1/4 inch(?) Massive things (to a 10 year old boy anyway) it had the monitor though.. I had one a few years ago, in the loft down my mom's house, she had a new roof, when I went up after a few years, no computer... My own fault. It had been up there for 15 years or more. I had forgotten about it..
Part 1 - ruclips.net/video/XBQJHqbnVco/видео.html
Part 2 - ruclips.net/video/UyQ8ROnTrg0/видео.html
Part 3 - ruclips.net/video/IY1eqRxM48s/видео.html
Not sure why some of the title music vanished there when outputting... Always something wrong with my vids lol :o)
Here's the link to the video which talks about building the BBC - from a key person who worked at Acorn:- ruclips.net/video/y4WG549i3YY/видео.html
GadgetUK164 - Retro Gaming Repairs & Mods
I did spot that earlier, but I'm too overheated to be pedantic about it. lol
GadgetUK164 - Retro Gaming Repairs & Mods
Oh, btw, I still have a Merlin Tonto here which has the different type of speech ROM in it.
I wonder if anyone has dumped the ROM yet, as it could then be used by anyone on a Beeb (using that TMS ROM emu project thingy)?
GadgetUK164 - Retro Gaming Repairs & Mods
(as is typical after replying, I see you are already using a TMS6100 emu board. :p )
Holy moly Batman. Those fans are saving IC life!!! Amazing fix bud. Keep up the good work xxx
You must be pissing your mews off. Your hand 😂
Haha i started watching this video 3 or 4 hours ago & got as far as 40mins, then paused to look up Ad meliorum (not knowing that you were about to explain!) and ended up off on a tangent looking into US Marine slang then on to DIY automotive ECU kits/programming and finally back here! The slogan certainly is apt for Acorn too, from little acorns grow well not so much mighty oaks but mighty ARMs lol
Haha =D
A most enjoyable series thank you so much. Your Ad Meliora tribute at the end was just perfectly said.
Thanks, much appreciated =D
8:48 The solder pins on those switches form part of the contact. You can (gently) pull and twist them out with a pair of pliers, clean them and push them back in. It's not a guarantee they will work when they are re-soldered as there's another part that you can't get to, but it's worth a punt.
Intermittant keyboard switches are common on a beeb that hasn't been used for a number of years. The usual fix is just to tap vigoursly for a minute. If that doesn't work, you can desolder and "unscrew" (pull as much as unscrew) one leg, clean it and replace before repeating with the other leg - don't remove both at once!
Great repair to the case.
Thanks for the mention, sorry you spent so much time debugging an EPROM that you may not have even tried without my trouble shooting chip!
Thanks =D Don't worry about that problem with the chip - not your fault at all lol! If there's one thing I've found over the years of doing my channel - Whatever I buy 'new', always causes me problems that others don't have. I've had it so many times its incredible lol, but it gives me more video content so I am happy lol. A good example is on the next video - boobip.com chips came with wires to clip on, and wires to join chips together. They look perfect - but there was a problem as you will see! And it's incredibly hard to believe lol.
Lovely video! I've enjoyed this little series immensely! Thank you.
Thanks =D
I totally agree when you talk about such so rare but also so hot chips and the reason to put a fan there.
=D Thanks for the Patreon support!!! =D
Bob Ross of the hardware, this realy calms me down :)
=D
i loved podd, when i was in junior school one of my 4th year teachers took a hex editor to podd just to find out what he can do, loved it when podd and explode/implode
=D
Oh dear, mentioning pulling things out with thin strands and mentioning the D, I can smell parody #2 lol.
It's a shame you can't fit a larger fan horizontally, say a decent large and thin 120mm Papst or Noctua. If it were me, I'd experiment using one of the of the motherboard screw placements to anchor one corner of said fan type and some rubber feet for the other 3 corners, it'd save on noise and create a lot more turbulence. But, it's not me nor my machine.
This Beeb has found a great owner, I am sure it's loving the lime light of late! Looking forward to episode minus 2 lol. Cheers for the entertainment Gadge.
Hehe, thanks lol =D Yes, the fan mounting needs improvement for sure. I think a small 3D printed mount that just extends out would solve it.
HCT means High-speed CMOS, with Schmitt trigger inputs (so it squares up the inputs). Not TTL.
Ahha!!! I need to stop being lazy and check out datasheets before guessing what something is lol! Thanks!
I nearly spat out my drink with laughter when the sirens were going off and you said "oh f*ck off" and the caption you wrote had me stitches! "Police coming to get me for my bad videos!" :)
Haha =D What I didn't show is the 3 re-takes before that - each one stopped by numerous police flying past! That time pushed me over the limit lol!
The audio mod should really come from PL16 and fit a switch to kill the internal speaker, the sound quality of PL16 is much better than from the loudspeaker output on PL15.
Regarding the temperatures inside the computer, they reach around 75C when the ambient temperature is 30C, it doesn't need cooling, as the higher temperature means faster heat loss. Unlike the Ferranti ULA in the Sinclair Spectrum, the BBC has enough space above to allow the heat to escape.
The most common failure is the power supply and the hotter that runs, the shorter its life (electrolytic capacitors leak and dry out) this in turn puts more stress on the components, heating them further. A good mod to do (without needing lots of fans and heatsinks) is to put a fan in the grille of the power supply and run a wire to a spare V2 pad (12V) it will have to be a slimline fan. This would prolong the life of the PSU and reduce the fear of logic chips reaching their danger point of 140C (yeah, we're a long, long way from that level - these aren't nVidia/AMD flipchips that are soldered into another package - XBox360 Red Ring of Death, MacBook Pro 2012 et.c. that die at 105C)
Unfortunately, at some point the design was changed to restrict the vents on the underside and the vents on the lid - I guess kids were poking things through the holes and the computer doesn't like that much 😆
It looks like you're having fun with it, maybe try the 1MHz Pi projects like HDD, Teletext, Music 5000 (synth) and there's a good Pi Econet Server project underway that works well (as you've got an Econet interface)
Friday night is becoming a regular "gadget-athon" for me :)
.... btw you can do "*." as a quick way to do a catalogue. In fact most things can be shortened so "*disc" is "*d.", "*help" is "*h." etc
=D Thanks! Yes, I remembered about the dot stuff and tend to use that in lots of places but sometimes forget =D Thanks for the Patreon support btw =D
No problem at all. You're welcome for the support especially as your videos just keep getting better and better :)
Enjoyed these BBC model B videos Chris. Have to say, that's one nice looking BBC model B now mate. I'm super jealous.
Thanks mate =D
Love this series on the Beeb keep up the amazing work 👍
Thanks! Very much appreciated =D
The Ferranti chip on the Spectrum is a classic example of why you need heatsinks or the TED chip on the C16.
Good examples there!!!! The TED dies too often for that reason =/ I dare not imagine how few TEDs there are left out there tbh.
Nice first ARM chip computer. Missed my TI/99/4A computer.
The BBC Model B used a 6502, it was the Archimedes that Acorn produced which was the first ARM computer =D
Great stuff Gadget. A beast of a repair project well done. Makes me want to get back to my Amstrad project, just don't have the time right now :(
Thanks =D Yes, the beeb was quite a lot of work lol. Glad to have got to the end of it lol.
I think them key switches come apart by using some pliers and actually unscrewing the actual pins protruding from bottom.
I think you are correct there =D
I think ST stopped making EPROMs in 2011/12 so any EPROM you buy off ebay with a date code after 2012 has definately been rebadged. You can use paint stripper to reveal the real speed of the EPROM. Most 10F1s are really 12F1s or 15F1s. I bought a bunch of AMD flash chips from ebay and not one of them was manufacted by AMD, they were all Macronix rebadged.
oooh I learnt a new word "fudgery"!! love it! :-)
Haha :o)
Could you test “Fortress Game” this game has a quirk and seems to effect the sync on my RGB monitor
Yeah it's funny in vintage computers where you have absolutely no heat distribution to speak of with things running as hot as they do. That's idiotic those people complaining about adding heat sinks & fans after the fact, no company ever has any concern about the lifespan of hardware beyond the time period they can make money from it, period. O_o??? 33:26 ^_^
Yes, you're right! And I know I've moaned about this a number of times before, but I think its important to get across to people that still don't think temperature is a factor.
Logan Jorgensen - Time to step off your soap box.
I wonder if you could load the PODD image into a hex editor and get all the words he knows? Or that might be classed as cheating! Can see would have been fun back in the day though.
Yes, you can =D Some people did that back in the day to cheat!
You gonna release this the BBC repair on BluRay box set?
Hehe =D I suspect 0 copies would sell lol.
Regarding the heatsink commenters... Commodore never specified heatsinks for their chips because they wouldn't have stretched the budget to include them!!
I remember Podd from school as well but I forgot how creepy looking he was... I know as late as 2002 a chemistry teacher at my old school still used to haul out a BBC to show a photosynthesis program, because nothing else had bettered it!
Yes, you're correct with regards to heat sinks! Cost was often a key factor. That was why they ended up just using the RF shield as an extended heat sink, although that made things worse imo. LOL @ teacher using beeb still in 2002 - I can understand that! Lots of educational stuff seems to be lacking modern updates.
Yay! Watching now. Feet up. Coffee. 22:30 round the gf's 😎👌 perfect mate.
Cheers =D
shouldn't that EPROM have had a cover over the window to protect it after being programmed?
Yes, it should have a label or something to protect it! But that wasn't the issue! Originally it had a sticker over it - wasn't working, yet it compared byte for byte identical to the image file. I took it off to reprogram it a second time - same issue =/
I think the moral of this story is, never try to fix a BBC Model B ever again.. :)
Haha :o) I have learnt a fair bit from this BBC, so I think other repairs in future would be easier!
When did this console come out? and was it only released in Europe? I've never heard of seen anything about this console
The BBC computer was produced in 1981 - primarily for the BBC (British Broadcasting Corporation), and the BBC pushed it to schools as part of an educational project. So many schools, colleges and universities in the UK used them. Acorn also sold them to some businesses and home users too. Most popular in the UK, but some made there way to europe and other parts of the world too.
Foxtrot Oscar PoPo Officer @33:40 haahaaa
:o)
Have you ever thought of making a magazine/book based on console repairs and quick fixes?
I have, but just dont seem to have the time lol! Maybe one day!
I was toying with the idea ages ago of a top 10 for every 80's/90's retro console and a write up on each game with tips and guides etc. but I never found the time either, I hit 40 and just want to sit on my arse drink a beer and mess around on here where time permits.
That's a good idea! Lots of work though lol
Maybe if I get a mate involved, trouble is they are all lazier than me, maybe just do a top 10 SNES, AMIGA and MEGADRIVE, that would be less time consuming, and a full page on each game, I'll do it in a scrap book first, but don't hold your breath, something more important always gets in the way of any hobby or project I start, which is why I keep my videos short and never have a set date for when one will be posted, I've had a Cannon Fodder GBC vid' on my desk for a while it needs a quick edit, I might get that done over the next 2 days.
You're correct in assuming that your IR thermometer is reading too low. The emissivity coefficient of shiny copper is vastly lower than that of most surfaces.
Emissivity coefficient table:
www.engineeringtoolbox.com/emissivity-coefficients-d_447.html
How to adjust the emissivity coefficient on 'your' IR thermometer (maybe - hope chipset is the same):
ruclips.net/video/J1CMrz7LOOI/видео.html
Thanks!!! That's great info! Unfortunately mine doesn't seem to be configurable like that one in the video (despite having same part number). I suspect mine is a clone =/
I just noticed that your 'clone' doesn't actually have the segments present on the display.
Since you can't change the emissivity setting of the measuring instrument, change the emissivity of that which is being measured instead. Some black electrical tape on the side of a heatsink should be a big enough target, given a bit of gun waving to find the hot spot.
Brilliant yet simple solution there!!!
Thunderf00t shows a good example of the effect of tape under an IR camera (and it's not even a dark coloured tape).
ruclips.net/video/wNHcIYyYDhU/видео.html
I wonder why they never made a BBC Model C!
They followed up with the + and Master models
part 7 ? where are part 5 and 6
It's part 4 lol =D I was kidding since I messed up the intro to the previous part, and this series was going on and on - it felt like part 7!
@@GadgetUK164 I am now a patreon supporter of your channel $5 :-)
Podd needs some fibre in his diet... Hahahahahahaha... It was my last year at primary school when the BBC came out. So it was all new, it had a cassette player (no disc drive) and some software that when you entered a barcode from food like crisps etc, it told you calories and salt and nutrition values. That was magic to us.. our teacher Mr Peerman was learning basic as we did. It really was a brave new world.
Haha :o) I think we used to load Podd from tape if I remember correctly. I guess disk drives were expensive back then =/
GadgetUK164 - Retro Gaming Repairs & Mods the disc drive came just before we left, 5 1/4 inch(?) Massive things (to a 10 year old boy anyway) it had the monitor though.. I had one a few years ago, in the loft down my mom's house, she had a new roof, when I went up after a few years, no computer... My own fault. It had been up there for 15 years or more. I had forgotten about it..
Most of the capacitors on eBay are all fakes, even the trusty Panasonic FC's. I now only buy from reputable company’s such as Mouser, Farnell, RS.
Definitely!!! I think 90% of what I buy on eBay is faked.
Fir... oh, nevermind.
=D
Aparently podd needs some fibre in his diet .. pmsl
:o)