stardot.org.uk

Hmmmm! Wonder where that went? . . . Did I use your 'other' eMail address in error? I'll check now - small pause - Darn, can't find hide nor hair of it - plays theme tune from some spooky film - OK I'll send it again (well, I'll try!

Dave H

MartinB wrote: ↑

Fri Jul 13, 2018 9:15 pm

Did you do anything with the naughty one yet Dave? Is it still heading my way?

Did you receive the dodgy video? I was waiting in case there were any further tests I could do before sending!

Dave H

New MGC's are now ready . . .

Dave H

hicks wrote: ↑

Thu Jul 12, 2018 3:18 pm

When you have a board sorted even if there's no FPGA code working on it yet, let me know. I'm quite interested in doing a port myself too as a fun project.

Will do . . .

Here's an image of all I currently have and a DXF of the same: Dave H

May be worth getting some freezer spray and seeing which IC is causing the problem - it sounds as if it is an overheating issue . . . Dave H :D I have some deep freeze (and deep heat) for spraying on injuries. Or some spray for freezing pipes. is there a particualar brand anyone recommends? Hmmmm! ...

As a matter of interest Do the cables you supply connect to user port 2 Idc or the pin header? I'm supplying the USB to Serial leads, the one recommended by MartinB, along with a 9 pin 'D' to 7 pin connector for the header pins - I epoxy a 4 and 3 way together and 'mark' pin 1. IMG_2632.jpg Dave H :D

May be worth getting some freezer spray and seeing which IC is causing the problem - it sounds as if it is an overheating issue . . .

Dave H

I could send you the DXF of the 'spreader' interface PCB, if that would help? Couldn't harm to look :) I'll dig it out . . . Current design replaces the ULA socket with standard turned-pin sockets. Do you have a link to the socket you're using for that? Similar to these. Whilst I think on, are you ...

For anyone else listening-in: I can supply the correct AP5-to-USB cables - just contact me . . .

Dave H

Elminster wrote: ↑

Thu Jul 05, 2018 3:09 pm

Is there any slogger plus 2 bareboards still hanging about, and would they work with an AP5. I would imagine a 'cut' down version of that that only had the extra cartiridges slot would be useful.

Not sure, none here . . .

Dave H

Not the MRB, pulled it this evening, was a pain as don’t know where I put the MOS, stole it from another Electron, and as they are both issue 4’s I took its ULA as well. (For my overheating issue, not put that in yet in case removing MRB fixes that). That's good, at least we're down to a basic mach...

Just posting this from a PM i've just sent:

"It may not be needed (the MRB, for the mouse to work), however, I'm seeing a Power-On anomaly when I'm using BeebSCSI 'sometimes' with a MRB fitted. Maybe worth a try (removing the MRB)?"

Dave H

OK, just caught up . . . Due to me not having most of what is needed, I think the best plan here is to look at the problem at Cambridge. I'll have at least one elk system - Hmmm! Better bring a spare - so we can change things out to eliminate the obvious. DaveB (hoglet) carried out extensive testing...

1024MAK wrote: ↑

Wed Jul 04, 2018 1:44 pm

No selection of partly corroded and covered in who knows what ½ pence coins?

Being a Yorkshireman I'm proud to still have a fluff covered farthing in my pocket

Dave H

My AP5 never worked, but I never told Dave (shhh). Well darn-you Duncan :lol: You should have let me know . . . I do test every interface before shipping - OK . . . I don't test the I 2 C or UPURS interfaces, but, as Martin points out they're just passive to the User Ports which are tested. I could...

Just thought of some thing else. Will the original MOS go back after MRB removed? Assume not. Was on my todo list to build a Prine MRB ROM image that incorporated the *TAPE changes for gosdc. Not a feature everyone will want but be good if that image was available to use. Oh! You didn't really need...

I'm interested in one (price allowing). I assume you'll include a JTag header to program/update? I'd be interested in making a version of my ULA for it. That was one of the plans I had before I started the FPGA core but building the HW for it and fitting the socket was a bit of a sticking point tha...

One other thought, it’s pretty hard to get hold of a Plus 1 and disk controller (Pegasus AP3/4 etc) on eBay, so having a modern alternative I would think would be attractive to a number of people. There are some Pegasus interfaces left . . . I'll see about getting them sorted out. I've also the AP3...

Although I still had an unanswered question about the MRB assupmtion. i.e. If you have one do you unplug that and put the 6502 back in? And it doesn't explicitly say (or I dont think it did) but the spec seems for the 'Ultimate ULA' seem to improve upon the standard MRB anyway. Yes, you'd need to r...

marcusjambler wrote: ↑

Mon Jul 02, 2018 7:59 am

Registering my interest for an upgraded Electron
I would have to send the electron for the ULA socket replacing etc

Only 49 left . . . Hurry, everyone

Dave H

What needs to be removed? Just the ULA and/or ULA socket? Or 6502, MOS ROM etc? Currently just the ULA socket, however, that may change! Is there any way to make use of the existing ULA socket to avoid desoldering that? I'd be interested in one of the boards as I'd be interested in converting my UL...

The sun's been out all day, Martin! Mrs H took me out to an open garden day - somewhere the other side of Barnard Castle :? I did catch the message this morning and I'm planning a short video to show the problems. Tomorrow . . . . If not, then Tuesday, as Mrs H is away for a few days :D Dave H :D Ed...

One of the big problems, for some potential users, is the removal of the ULA socket without damaging any of the tracks. I had planned to build a good sized batch of maybe 50 and offer a fitting service for those that can't. I'd be very wary of anyone having-a-go and then blaming the problem on the p...

Welcome to the Forum, scruss . . . Enjoy . . .

Dave H

After threatening to do this for a long, long time - I've finally programmed a MGC remotely using the UPURS interface on the AP5 - Was it a doddle? No, and yes! The 'no' bit was due to not finding “Ports (COM &LPT)”, when installing the FTDI drivers, on either of my Windows machines - one Tower, run...

An Electron ULA replacement is certainly technically possible, but I think the cost would work out at ~£50-£60 which make it unattractive, given working Electrons can be had for about half this. So it's been stalled for over a year now. My 'tardiness' can't have helped either :oops: Re the cost: Is...

Dave would you mind if i post you my boards and you program my two gals and test them, i can rule out the issue 4 board being the problem if it works then, happy to pay labour and time costs thanks. Has anyone got their old pal they can send me to replace my lost one otherwise this board is useless...

Slo wrote: ↑

Fri Jun 29, 2018 2:59 am

Dave will that be with a GAL in it or PAL? How much?

The would be a GAL.

Just the GAL £1.05 + P&P

I'd want to build and test first - let me know. Or, just let me know what you need . . .
Original Slogger board £10.00
6502 £1.30
GAL £1.05
Set of pins £2.20
Build and test FOC
P&P - TBA

Dave H

Here are the threads I remember from discussing these sorts of things before, might be worth a quick peruse, rather than me duplicate: Good reads, however, I was thinking more of a replacement BASIC ROM (32k or more with PLD switching) that would contain an integrated, expanded and backwards compat...

Re the Electron ULA replacement project - One of it's main project drivers is to SAVE dead Electrons - There's no other way, unless, by some miracle, an old/new source is found [-o< Of course, if you're going to all the trouble to replace the ULA then why not add features? Yes, you get carried away ...