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It's long overdue - Cosmac Elf II build

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HigashiJun
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Re: It's long overdue - Cosmac Elf II build

Post by HigashiJun »

rubber_jonnie wrote: Sun Apr 05, 2026 11:15 am The MK14 was never intended to have a case AFAIK, but it does have feet 😁
Still better than nothing...
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rubber_jonnie
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Re: It's long overdue - Cosmac Elf II build

Post by rubber_jonnie »

HigashiJun wrote: Sun Apr 05, 2026 11:29 am
rubber_jonnie wrote: Sun Apr 05, 2026 11:15 am The MK14 was never intended to have a case AFAIK, but it does have feet 😁
Still better than nothing...
The C1MPF (OSI 600D+OSI 610) also has feet :)

I'll figure something out I'm 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
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Re: It's long overdue - Cosmac Elf II build

Post by rubber_jonnie »

Well the PCBs for the improved LED display and the CDP1861 replacement have been shipped and should be here in a week :)

Annoyingly none of the stuff I ordered before easter has arrived, so everything is on hold Cosmac wise, though my Atom colour board did arrive on Saturday so I'll have a look through the BoM for that and see what parts I have for it in my spares drawers.
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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Re: It's long overdue - Cosmac Elf II build

Post by rubber_jonnie »

More stuff arrived today:

IMG20260408194331.jpg
IMG20260408194331.jpg (247.14 KiB) Viewed 1297 times

Namely the enhanced LED board and the CDP1861 replacement, both here 5 days earlier than shipping predicted :)
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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Re: It's long overdue - Cosmac Elf II build

Post by stephen_usher »

Yay! :-)
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: It's long overdue - Cosmac Elf II build

Post by rubber_jonnie »

OK, so everything is ordered for the CDP1861 replacement, though I have had to go to AliExpress for some parts as the prices for shipping for small items from the likes of Digi-Key, Farnell, RS and the like are really excessive.

I still need some parts for the add on large display, but I had six gorgeous TIL311 displays arrive today:

IMG20260409113606.jpg
IMG20260409113606.jpg (236.99 KiB) Viewed 1280 times

Which should look great when all hooked up.
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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Re: It's long overdue - Cosmac Elf II build

Post by rubber_jonnie »

The whole thing looks very nice :)

IMG20260409124736.jpg
IMG20260409124736.jpg (276.18 KiB) Viewed 1274 times

You get a 4 digit memory location display and a 2 digit memory contents display.
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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Re: It's long overdue - Cosmac Elf II build

Post by rubber_jonnie »

Well I've been finding it difficult to get hold of 16 pin dip resistor packs at 120R, so I made my own:

IMG20260410131821.jpg
IMG20260410131821.jpg (197.02 KiB) Viewed 1260 times

Just got to build the 2nd and I can see if we get anything on the original 2 digit display.
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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Re: It's long overdue - Cosmac Elf II build

Post by rubber_jonnie »

And the display runs :)

IMG20260410133929.jpg
IMG20260410133929.jpg (289.55 KiB) Viewed 1259 times

:girldance:

I also get 00 sometimes, but I am still waiting on one of the ICs that control the keyboard so can't go any further just now.

The resistor banks are just there to control LED brightness it seems.
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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Re: It's long overdue - Cosmac Elf II build

Post by stephen_usher »

Yay!!!
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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