ST KB in Mega ST case

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rubber_jonnie
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Re: ST KB in Mega ST case

Post by rubber_jonnie » Sat Oct 24, 2020 4:01 pm

atari030 wrote:
Sat Oct 24, 2020 1:45 pm
Ah, I see. I seem to recall all this when I towered my Falcon. I have an ST keyboard in a free keys case hooked to that. I have also used the MegaSTE KB with that, but, the mylar on all four of my MegaSTE/TT keyboards has gone to crap so I need to repair them. The reset line I have hooked to the PC tower case reset switch. I'd forgotten about that. Its handy having the turbo switch for the CT2 as well.

I'll see what I can rig tomorrow. Maybe a cable for the Falcon. I found your last discussion on KB's. I will have a crack at setting up my spare freekeys for the MegaST too. It might be of some help to you. From what I can see, the ST keyboard should be a drop in replacement.
Be interested to hear how you get on.
Collector of old Atari things:
800XL + Ultimate 1MB, 2x 1010 cassette, 1050 + Happy mod, 65XE (128k +APE Warp) & XC12, SIO2SD, 2600jr, 7800 and Lynx II
Atari 520ST (1Meg), 1040STF long button floppy, 2x 1040 STFMs + Gotek, 2x 4160STE with 32Mhz booster, ROM switcher, Mega ST1, Mega ST4, not to mention various bare ST boards for testing including a PAK 68/2 :)
Plus the rest..
Amiga stuff, Mac stuff, Sinclair stuff etc...
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atari030
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Re: ST KB in Mega ST case

Post by atari030 » Sun Oct 25, 2020 2:15 am

I pulled the PCB out of the freekeys and checked it out. There is a diode, cap and resistor. The resistor is 32k, cap is 2u2 63v.

So it looks like resistor 32k to 5v from TX, cap TX data to ground. Diode is across TX to 5v. Reset is grounded.

atari030
Posts: 164
Joined: Mon Feb 12, 2018 12:43 pm

Re: ST KB in Mega ST case

Post by atari030 » Sun Oct 25, 2020 2:25 am

I found this too, it looks like my idea will work.

https://atariage.com/forums/topic/18317 ... h-mega-st/

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