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General Stuff(tm)

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rubber_jonnie
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Re: General Stuff(tm)

Post by rubber_jonnie »

stephen_usher wrote: Sun Mar 20, 2022 7:08 pm The BBC was way out of our price bracket too, at £399. I started the same way as you.
I think it was for many people, none of my friends had either an Apple ][ (The other school computer round our way) or a BBC, it was a mix of ZX's, a TRS-80 (Only one friend had that and that wasn't cheap IIRC), Dragons, VIC-20s and some C64s.

Most, like me, had 48k Speccys. Later I had Atari 8 bit machines as their prices plummeted.
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...
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stephen_usher
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Re: General Stuff(tm)

Post by stephen_usher »

The last of the surface mount capacitors and the 68882 have arrived for the Mac LCII, so I can start on the recapping tonight.

I'll first have to desolder the power connector and one of the audio connectors as they're too close to use hot air and not melt them. I'll not desolder the SIMM slot though. I'll just have to use plenty of Kapton tape to protect it.

P.S. Oh, it's not the 68882 arrived, it's a 4MB SIMM. No matter.
P.P.S. The 68882 also arrived, but I didn't notice the jiffy bag in the pigeonhole.
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
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stephen_usher
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Re: General Stuff(tm)

Post by stephen_usher »

Well, the 4MB SIMM doesn't work. Eight chimes.
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
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rubber_jonnie
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Re: General Stuff(tm)

Post by rubber_jonnie »

stephen_usher wrote: Mon Mar 21, 2022 6:11 pm Well, the 4MB SIMM doesn't work. Eight chimes.
Rubbish!
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...
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stephen_usher
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Re: General Stuff(tm)

Post by stephen_usher »

Yeah. Unfortunately I've nothing else I can test it in.

Anyway, things have conspired tonight to mean that I don't have time to start on the recapping. Probably tomorrow now.
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
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rubber_jonnie
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Re: General Stuff(tm)

Post by rubber_jonnie »

stephen_usher wrote: Mon Mar 21, 2022 9:23 pm
Anyway, things have conspired tonight to mean that I don't have time to start on the recapping. Probably tomorrow now.
I know that feeling for sure.
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...
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stephen_usher
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Re: General Stuff(tm)

Post by stephen_usher »

Off-topic but only sort of as it's DCC controlled...

Something arrived which I pre-ordered a year ago...

IMG_2642.jpg
IMG_2642.jpg (200.57 KiB) Viewed 1848 times
IMG_2645.jpg
IMG_2645.jpg (132.71 KiB) Viewed 1848 times

It's a pity that due to planning issues I have nowhere to run it yet.

I used to see the original doing trials up and down the Midland Mainline in the mid-70s.
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
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stephen_usher
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Posts: 7498
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Re: General Stuff(tm)

Post by stephen_usher »

Back to the old computers...

This evening I re-capped the Mac LCII.

Although all but a couple of the capacitors showed no signs of leakage all of them had actually leaked slightly underneath. Thankfully the solder resist on the LCII seems bulletproof, or at least capacitor juice-proof as a quick wipe with an IPA soaked cotton bud got rid of everything. Well, other than on one pad which needed a small amount of work.

I also fitted a PLCC-68 socket for the FPU, and I fitted that as well.

IMG_2646.jpg
IMG_2646.jpg (92.71 KiB) Viewed 1830 times

I tentatively turned the power on and... Bong! Happy Mac. :-)

So I put it all together, fitted the battery and set it up properly. Then ran Speedometer to make sure it could see the FPU...

IMG_2647.jpg
IMG_2647.jpg (66.71 KiB) Viewed 1830 times

Success!
Anyway, here are the benchmarks relative to a Color Classic, which is the most similar machine to this.

IMG_2648.jpg
IMG_2648.jpg (99.28 KiB) Viewed 1830 times
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
User avatar
rubber_jonnie
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Posts: 15180
Joined: Thu Aug 17, 2017 7:40 pm
Location: Essex
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Re: General Stuff(tm)

Post by rubber_jonnie »

stephen_usher wrote: Tue Mar 22, 2022 1:26 pm Off-topic but only sort of as it's DCC controlled...

Something arrived which I pre-ordered a year ago...


IMG_2642.jpg
IMG_2645.jpg


It's a pity that due to planning issues I have nowhere to run it yet.

I used to see the original doing trials up and down the Midland Mainline in the mid-70s.
Wasn't this the infamous tilting train that was eventually cancelled?
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
rubber_jonnie
Site Admin
Site Admin
Posts: 15180
Joined: Thu Aug 17, 2017 7:40 pm
Location: Essex
Contact:

Re: General Stuff(tm)

Post by rubber_jonnie »

stephen_usher wrote: Tue Mar 22, 2022 9:48 pm Back to the old computers...

This evening I re-capped the Mac LCII.

Although all but a couple of the capacitors showed no signs of leakage all of them had actually leaked slightly underneath. Thankfully the solder resist on the LCII seems bulletproof, or at least capacitor juice-proof as a quick wipe with an IPA soaked cotton bud got rid of everything. Well, other than on one pad which needed a small amount of work.

I also fitted a PLCC-68 socket for the FPU, and I fitted that as well.
IMG_2646.jpg

I tentatively turned the power on and... Bong! Happy Mac. :-)

So I put it all together, fitted the battery and set it up properly. Then ran Speedometer to make sure it could see the FPU...
IMG_2647.jpg
Success!
Anyway, here are the benchmarks relative to a Color Classic, which is the most similar machine to this.
IMG_2648.jpg
Very nice, plus the picture on it is super crisp on that display :)

Did you replace the Maxell bomb? I hate those damn batteries, they seem to have molecular acid for blood that eats through everything!! (That's my film reference for the evening :) )
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...
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