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stephen_usher
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Re: General Stuff(tm)

Post by stephen_usher »

They're the same thing. The 4 is just a 2 with double sided disk drives.

There's later 2/83 ad 4/83 types with the CPU running at 5MHz rather than 2.5MHz.

I've been doing my homework. :-)
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.
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Re: General Stuff(tm)

Post by rubber_jonnie »

stephen_usher wrote: Sun Feb 11, 2024 10:32 pm They're the same thing. The 4 is just a 2 with double sided disk drives.

There's later 2/83 ad 4/83 types with the CPU running at 5MHz rather than 2.5MHz.

I've been doing my homework. :-)
A Z80 running at 5Mhz is a thing of beauty 😁
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
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stephen_usher
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Re: General Stuff(tm)

Post by stephen_usher »

Especially without the need for wait states due to screen access.

Anyway, this evening I've been getting on with some model railway stuff. I've been working on the first bit of station platform: foam board core with 3D printed walls and coping stones. Eventually the "asphalt" will be simulated using tile grout painted grey.

IMG_3576.jpeg
IMG_3576.jpeg (370.61 KiB) Viewed 1184 times

The coping stones aren't yet stuck down.
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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HigashiJun
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Re: General Stuff(tm)

Post by HigashiJun »

Let us know of your progress.
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stephen_usher
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Re: General Stuff(tm)

Post by stephen_usher »

Of which one? The Kaypro or the model railway? :-)
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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HigashiJun
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Re: General Stuff(tm)

Post by HigashiJun »

The model railway for me.

8-)
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stephen_usher
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Re: General Stuff(tm)

Post by stephen_usher »

Hehe. OK.

This is what it looked like when I'd (almost) finished laying the track last July.

IMG_3376.JPG
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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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PhilC
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Re: General Stuff(tm)

Post by PhilC »

Hi Stephen, Its Z8430AB1 I have, so sorry, can't help you on this occasion.
If it ain't broke, test it to Destruction.
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Re: General Stuff(tm)

Post by stephen_usher »

PhilC wrote: Mon Feb 12, 2024 1:44 pm Hi Stephen, Its Z8430AB1 I have, so sorry, can't help you on this occasion.
No problem. :-)
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 »

More model railway station platform building tonight.

Popped out to B&Q to get some charcoal coloured tile grout, which will become the asphalt, and then stuck the coping stones down.

Designed and printed some central concrete drains. Sprayed a number of them up so I can stick those down tomorrow night. I can then try out the grout.

IMG_3577.jpeg
IMG_3577.jpeg (217.8 KiB) Viewed 1129 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.
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