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Hmmm ... I wrote a small loop using the SBC6120 monitor which continuously issues the 6410 IOT (as suggested by Dave earlier) and the LOAD_DAR_H...

Well, you can always do your own handler. Not at all certain which would be more difficult. Since you have a running system on emulated RX01 it...

I thought it was neato when messing with batch files. I always liked making my own batch files for doing this and that.

Both serial ports are in the processor chassis in the PDP-12, and not in the Omnibus expansion chassis.

Civ2 runs fine on a 486 too. I think I have the DOS version of Civ.

Those prices are not nearly as bad as I thought, but there is the concern about if they really have them...and of course, used...but you must have...

Yeah, normally there's a cord running in there with the ones i've found photos of online. I kinda hinted at that in OP but didn't really word it...

>>> Not much would work otherwise anyway. Just thought I would mention it though... I had to try very, very hard to put IOT2 in 'the wrong way'...

Ok I understand. Here is the SENDC code from the CJL version I have.SENDC, .-. /TRANSMIT A CHARACTER ROUTINE. ...

Hello hjalfi, Not really sure what you're doing, but I've got an Amstrad PCW here with a 40t 5.25" drive attached as B:. This works fine with...

Ok, you convinced me! I'll get one of those once I get a little free cash

Now, can I do this and replace the AWARD BIOS with an IBM BIOS? Not that it actually matters, but I'm kinda sad that I can't run IBM PC-DOS on my...

@Michael - I'd love to get a copy of your LTSpice model. Please post a link or email to me directly. Thanks.

I think you are out of bandwidth! I would try feeding it into MMTTY. This will show you the mark/space frequencies and decode it if its 300 baud or...

The system in the video is a AN/UYK-19 1602B that was built in the early nineties by Loral under license. I have an older 1602 that’s from the late...

Thanks Dave, I have the files from both RBC archive and the originals from Bob's site. They match. Both ICs are in the correct orientation. Not...

Doug, The design as it stands does not support a Data Break interface. I suppose I could add this but could I also emulate the RK05 with a...

ok thanks for your help. I'll keep you posted. Regards,

Thank you. I also much prefer though-hole assembly. The laptop is a D630 - it has been going strong for years now and is my go to machine because of...

Since it clearly states a problem with the cache and the cache is part of the CPU, I don't think anything else could cause this.

The security setup in bios should be: System Password: Not Set System Lock: Disable Keyboard Lock: Disable Setup Lock: Disable

After re-seating the cpu once again it seems to boot every time but to the same post error as originally. I'll hunt down a CPU. Don't see any other...

You are aware that the IOT2 PAL is installed on the board ‘backwards’ (i.e. the opposite way round to all of the other ICs with the same...

I think you would have to be careful with the material, especially not run it for too long if it was paper based. For example, polishing metal,...

pin 1 and 8 indeed has +5v. but 5 has no signal. 6 is always high regardless of key pressed 2 & 3 both always high regardless of key pressed ...

There was a commercial disk cleaner that actually used paper? The ones I have seen use some kind of stiff smooth white fiber cloth. The...