Search found 2764 matches

by Prime
Sun Sep 22, 2019 10:38 am
Forum: upcoming and recent events & exhibitions
Topic: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019.
Replies: 231
Views: 7670

Re: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019.

Yes, that's an unique board..... but I always wondered what the differences between the several issues were besides the keyboard ..... It looks very familiar with an issue4 or 5 board. Didn't some of the earlier issues not have the jumpers to bypass the regulators? Could ask Charlie to check his is...
by Prime
Thu Sep 19, 2019 8:33 am
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 681
Views: 57721

Re: ICE T65/Z80/6809

Although I have the 1Mhz FPGA and ISE as backup. In ISE you can freely mix VHDL and Verilog in the same project. Infact in ISE you can use Schematic, Verilog & VHDL in the same project if you want, saw that done with an Apple II project I was looking at a while back. Though I've not ever done it my...
by Prime
Tue Sep 17, 2019 9:42 pm
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 681
Views: 57721

Re: ICE T65/Z80/6809

I've pushed this change back to github: https://github.com/hoglet67/AtomBusMon/commit/9c6960cc Hi Dave, Can confirm this is MUCH more usable, boots fine on the Dragon 64 (it didn't boot at all before), and is also for the first time working with a DragonMMC card plugged in. Now this should make it ...
by Prime
Tue Sep 17, 2019 7:32 pm
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 681
Views: 57721

Re: ICE T65/Z80/6809

Hi Phill, Did you ever figure out what was barfing the 6809E target? I've spend some more time on this and I think I understand the problem now on the Dragon 32. It seems the E clock is a bit ropey as seen by the FPGA: I The falling E clock edge bounces around for a while, and about 70ns it's just ...
by Prime
Mon Sep 16, 2019 9:30 am
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 681
Views: 57721

Re: ICE T65/Z80/6809

Hi Dave,

Did you ever figure out what was barfing the 6809E target?

Cheers.

Phill.
by Prime
Mon Sep 16, 2019 9:27 am
Forum: acorn atom and system
Topic: Atom mini-tape drive...
Replies: 7
Views: 227

Re: Atom mini-tape drive...

roland wrote:
Thu Sep 12, 2019 9:06 am
Hi Phill,

The MDCR is directly connected to the Atom's VIA. See: http://www.acornatom.nl/atom_nieuws/198 ... 852053.gif
Ahh yes that makes sense, I always forget that the VIA's I/O lines also go to the bus connector.

Cheers.

Phill.
by Prime
Mon Sep 16, 2019 8:39 am
Forum: upcoming and recent events & exhibitions
Topic: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019.
Replies: 231
Views: 7670

Re: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019.

Ah yes,

Lesley will be around for this one, she'll be going off doing her own thing during the day, so won't need 'table space' :) But will be joining us for the meal on Friday evening....

Cheers.

Phill.
by Prime
Mon Sep 16, 2019 8:37 am
Forum: upcoming and recent events & exhibitions
Topic: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019.
Replies: 231
Views: 7670

Re: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019.

You wouldn’t happen to have any of the devices that plug onto Atom motherboards to provide video output? You had a quick look at my two Atoms a few ABUGs back and I made a mental note at the time that I needed to get hold of some! You mean connectors for the composite out (PL4), if so yeah could pr...
by Prime
Sun Sep 15, 2019 9:14 pm
Forum: upcoming and recent events & exhibitions
Topic: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019.
Replies: 231
Views: 7670

Re: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019.

With less than a week to go, anything anyone wants me to bring beyond :

Normal soldering equipment & tools.
Eprom / AVR / PIC / Xilinx programmers.
Shuttle PC for reading floppies.
Dragon + PSU (for looking at sbadger's Dragon).
Normal assortment of Beeb / Atom stuff.

Cheers.

Phill.
by Prime
Thu Sep 12, 2019 8:30 am
Forum: acorn atom and system
Topic: Atom mini-tape drive...
Replies: 7
Views: 227

Re: Atom mini-tape drive...

Hi Phill, like Colin & Roland said I have a working MDCR player connected to one of my Atoms... :D https://www.youtube.com/watch?v=ocl1SbwkfLY Ahh that's the one I remembered seeing. Looks like the interface card on the Atom is built into the Drive unit (in the same way as AtomDOS and the floppy). ...
by Prime
Wed Sep 11, 2019 9:59 pm
Forum: acorn atom and system
Topic: Atom mini-tape drive...
Replies: 7
Views: 227

Atom mini-tape drive...

Hi all,

Do I remember one of the Atom users on here posting a video of an Atom connected to a mini-tape drive, big square black fronted thing. I think the same unit was used sold on other machines as the IKON tape drive.

Cheers.

Phill.
by Prime
Tue Aug 27, 2019 9:54 pm
Forum: acorn atom and system
Topic: Acorn Atom's Value ?
Replies: 9
Views: 444

Re: Acorn Atom's Value ?

roland wrote:
Tue Aug 27, 2019 12:37 pm
(that's another law in nature: the survival of the fittest).
But most people don't interpret that correctly in the evolutionary case at least "fittest" means best adapted which may not be "bigest/strongest/fastest" etc

Cheers.

Phill.
by Prime
Mon Aug 26, 2019 9:50 pm
Forum: hardware
Topic: Femto Flash Floppy
Replies: 28
Views: 1041

Re: Femto Flash Floppy

Be interesting to know how the data is passed back and fourth to the STM side, does it do something like set track and sector to $FF and then pass a fake sector over with a pre-determined format..... If there's already a protocol for doing this used by other systems, then Acorn systems should try an...
by Prime
Sun Aug 25, 2019 9:40 am
Forum: stardot.org.uk
Topic: Notifications....
Replies: 6
Views: 628

Re: Notifications....

Right inbox at 11% full but message still on hold.....

Don't worry I fixed it.

Cheers.

Phill.
by Prime
Sun Aug 25, 2019 8:29 am
Forum: stardot.org.uk
Topic: Notifications....
Replies: 6
Views: 628

Re: Notifications....

Right cleared out inbox.

Cheers guys.

Phill.
by Prime
Sat Aug 24, 2019 10:05 pm
Forum: stardot.org.uk
Topic: Notifications....
Replies: 6
Views: 628

Notifications....

Hi all, Had a notification of a PM in my email, clicked on link, and it took me to a page for the PM that said.... "Information You are not authorised to read private messages that are on hold." Well in that case why the notification, if I can't read the PM yet perhaps the forum should not be notify...
by Prime
Fri Aug 23, 2019 2:53 pm
Forum: hardware
Topic: Femto Flash Floppy
Replies: 28
Views: 1041

Re: Femto Flash Floppy

Phill, thanks for that info. I had considered that but read somewhere someone had a problem doing that. But if it worked out OK for you then I'll do just that. Don't see any level problems the 3V CPU driving 5v LS ? Yep seemed to work OK for me in the System's drive chain....actually the way I desi...
by Prime
Fri Aug 23, 2019 8:42 am
Forum: hardware
Topic: Femto Flash Floppy
Replies: 28
Views: 1041

Re: Femto Flash Floppy

Jason, Dunno if you have thought of this, but for the FF addon board id did for the System card I used a 74LS07 open collector chip, that way you don't need the FETS and their components, might make it easier to build, and give you a little more room if you can get LS07s in surface mont versions. Le...
by Prime
Thu Aug 22, 2019 10:55 pm
Forum: upcoming and recent events & exhibitions
Topic: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019.
Replies: 231
Views: 7670

Re: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019

Please put me down also as a "no kitter" fri-sun I'm not even sure I need any table space ... are "no kitters" not, essentially, "punters" :D Well sort of**, we generally get access to the museum 'after hours',asically until either we or (museum) Jason wants to go home, which normal museum visitors...
by Prime
Wed Aug 21, 2019 10:06 pm
Forum: off-topic
Topic: Dr. Who Complete Guide
Replies: 5
Views: 244

Re: Dr. Who Complete Guide

Dunno if it's just me but with the black boarder on top, right and bottom sides of that scan it almost looks like it may have been taken from a hardback book printing. Doesn't look like Dr Who monthly, having said that I stopped getting it in the late 80s so may have changed by 1991. Cheers. Phill.
by Prime
Wed Aug 21, 2019 9:59 pm
Forum: off-topic
Topic: Capacitor getting warm.
Replies: 5
Views: 257

Re: Capacitor getting warm.

Hi all, Cap is a 16V, which is what it was replacing so assumed that would be OK, waveform on it is a solid -4.8V - -4.9V (with a 5V input). If I remove the cap pin 5 is toggling, but that's kind of what you'd expect. Only thing being driven by that cap is the other 7660, it also goes to a jumper pa...
by Prime
Wed Aug 21, 2019 9:40 am
Forum: off-topic
Topic: Capacitor getting warm.
Replies: 5
Views: 257

Capacitor getting warm.

Hi all, Sorry I seem to be asking more general electronics questions than Acorn related ones lately....... I've tracked down the LCD problem in the Huskys and it is indeed warn out capacitors (well actually in one case incorrectly polarized caps as the silk screen on the PCB was wrong!). The caps ar...
by Prime
Tue Aug 20, 2019 12:49 pm
Forum: software: classic games
Topic: Remember the Econet game Cave? Want to play it RIGHT NOW?
Replies: 13
Views: 536

Re: Remember the Econet game Cave? Want to play it RIGHT NOW?

Windows doesn't install telnet by default, hasn't done since about Windows 7. You can re-add it fairly easily. I normally use netcat for the sort of thing telnet would be useful for. Terminal emulation was the bit I was missing. It doesn't? Was on this Windows 10 install......mind that is the "educ...
by Prime
Tue Aug 20, 2019 9:51 am
Forum: software: classic games
Topic: Remember the Econet game Cave? Want to play it RIGHT NOW?
Replies: 13
Views: 536

Re: Remember the Econet game Cave? Want to play it RIGHT NOW?

Neat idea. I haven't got a suitable telnet client installed, got any recommendations (I'm on Windows) I believe most versions of Windows still have a command line telnet client you can use from a CMD window. Likewise for Linux and Macos. Though this doesn't really have any terminal emulation, it's ...
by Prime
Sat Aug 17, 2019 4:59 pm
Forum: off-topic
Topic: Cheap Xilinx Platform Cable
Replies: 7
Views: 316

Re: Cheap Xilinx Platform Cable

I have two clone programmers, both of which work fine under Windows 7/64 (and both worked uner XP). One I got ages ago from Kanda : https://www.kanda.com and was at the time about £100, which was still less than half of what an official Xilinx one was. They currently seem to be doing (judging by the...
by Prime
Fri Aug 16, 2019 2:07 pm
Forum: upcoming and recent events & exhibitions
Topic: Cambridge Sept 2019 archiving thread
Replies: 39
Views: 1118

Re: Acorn World and ABUG meetup, Cambridge 20-22nd September 2019

I can bring my scanner I live just around the corner, if need be. Also the museum does software preservation, I believe. If they are rare I'm sure Jason Fitzpatrick from the museum would be interested. They have the equipment upstairs, I believe. You'll have to ask CCfCH though. Read in one thread ...
by Prime
Fri Aug 09, 2019 8:51 pm
Forum: other vintage computer hardware, software and games
Topic: Fading LCDs.....
Replies: 4
Views: 265

Re: Fading LCDs.....

Some LCD displays need a negative reference voltage for the contrast control circuit. It's worthwhile checking this. If a DC/DC converter is used, it could be a failed capacitor. As these are battery powered handheld machines**, yep if they need a -ve voltage there will be a DC/DC converter there :...
by Prime
Fri Aug 09, 2019 12:06 pm
Forum: other vintage computer hardware, software and games
Topic: Fading LCDs.....
Replies: 4
Views: 265

Re: Fading LCDs.....

danielj wrote:
Fri Aug 09, 2019 10:32 am
Feels a bit capacitory to me? Just a quick google after that suggests that capacitors are the issue in old watches with failing LCDs...
Indeed that's what I thought....maybe time to invest in an LCR meter that will measure ESR.

Cheers.

Phill.