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Hello to the group

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kgilmore
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Joined: Mon Sep 01, 2025 10:36 am

Hello to the group

Post by kgilmore »

Long time reader, first time poster. I was an Atari user (1040FM, then 520STe upgraded to 4 MB, then a Falcon) but drifted away and am now a dedicated Mac user. Still have the Falcon but while it boots up it doesn’t recognise floppy and hard drive so there’s a bit of work there to get it up and running and upgraded to make it useable.

In passing, given that I thought Atari made a mistake in not releasing the Mega ST with a 68020 and sockets for 68851 and 68881 and a fully 32 bit internal bus, I wonder if anyone has ever tried to design an alternative Mega ST along those lines more as a proof of concept as to what could have been? I have tried looking on eBay for 68851s but they’re almost impossible to find.
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mrbombermillzy
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Re: Hello to the group

Post by mrbombermillzy »

Welcome @kgilmore :)

You never know. Someone may have thought of this already.

I think AlanH was designing a 68020 board for the Mega ST. Not sure it had math co-pro as well though.
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HigashiJun
Posts: 2137
Joined: Fri Jun 19, 2020 7:21 am
Location: Tokyo

Re: Hello to the group

Post by HigashiJun »

kgilmore wrote: Sun Sep 14, 2025 5:50 am I have tried looking on eBay for 68851s but they’re almost impossible to find.
I know a shop here in Tokyo where they still have a stock of 39 units of XC68851RC16A.

They cost less than £15 each, postal fees not included.
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rubber_jonnie
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Re: Hello to the group

Post by rubber_jonnie »

:welcomewave:
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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HigashiJun
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Location: Tokyo

Re: Hello to the group

Post by HigashiJun »

And of course, welcome to this great forum !
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DoG
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Joined: Sat Apr 07, 2018 12:26 pm

Re: Hello to the group

Post by DoG »

mrbombermillzy wrote: Sun Sep 14, 2025 7:33 am I think AlanH was designing a 68020 board for the Mega ST. Not sure it had math co-pro as well though.
I wonder if that became the MonSTerbo? It has a 68020. It got socket for FPU as well. But it's for the STe.
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mrbombermillzy
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Re: Hello to the group

Post by mrbombermillzy »

DoG wrote: Sun Sep 14, 2025 12:13 pm
mrbombermillzy wrote: Sun Sep 14, 2025 7:33 am I think AlanH was designing a 68020 board for the Mega ST. Not sure it had math co-pro as well though.
I wonder if that became the MonSTerbo? It has a 68020. It got socket for FPU as well. But it's for the STe.
He was actually intending to make the MonSTerbo for the Mega ST too, but now it seems he is being pulled in all directions with different plans, so this has probably dropped down the 'to do' list. :(

IIRC there was going to be an accelerated Megabus or something along those lines.
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