Search found 6718 matches

by 1024MAK
Fri Nov 24, 2017 3:26 pm
Forum: other vintage computer hardware, software and games
Topic: ZX Spectrum next... Anybody backing ?
Replies: 39
Views: 1837

Re: ZX Spectrum next... Anybody backing ?

Only two camps :shock: I think you find I'm the third way :lol: I have both original systems and FPGA based systems. I also have my fingers near to a PI, but have not done that much with them so far... But, the Acorn BBC Micro was designed with another (faster, more powerful) processor in mind. The ...
by 1024MAK
Fri Nov 24, 2017 3:17 pm
Forum: other vintage computer hardware, software and games
Topic: Superbrain smorgasbord
Replies: 9
Views: 402

Re: Superbrain smorgasbord

Mark of RetroClinic sells serviced key switches.

Mark
by 1024MAK
Fri Nov 24, 2017 7:36 am
Forum: upcoming and recent events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 139
Views: 4519

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

Ere, stop pulling, or the thread will completely unravel.... :shock:

<shuffles off muttering something under his breath about worlds and spectrums...>

Mark
by 1024MAK
Thu Nov 23, 2017 11:21 am
Forum: general
Topic: Today I received.....
Replies: 4285
Views: 240408

Re: Today I received.....

jonb wrote:A new toy to spend my precious time and money on..

Not much boot space to fit many of the larger 1980's computers and monitors in :shock:

But agree, it's a good looking car 8)

Mark
by 1024MAK
Thu Nov 23, 2017 11:15 am
Forum: off-topic
Topic: Which soldering iron?
Replies: 44
Views: 563

Re: Which soldering iron?

Well, if you want a single 250mW 4.7k resistor, I can send one to you for the cost of a second class stamp.

Mark
by 1024MAK
Thu Nov 23, 2017 11:04 am
Forum: off-topic
Topic: Which soldering iron?
Replies: 44
Views: 563

Re: Which soldering iron?

Ordered a small kit of that :) The resistor is for the little board on here: https://nfggames.com/nfg/x68repair/ This is what I ordered http://www.ebay.co.uk/itm/2W-4-7K-ohm-Chunky-Resistor-5-Yellow-Violet-Red-Gold/122573886694?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649 A resist...
by 1024MAK
Thu Nov 23, 2017 10:58 am
Forum: off-topic
Topic: Which soldering iron?
Replies: 44
Views: 563

Re: Which soldering iron?

Oh, and why does every thread about soldering wander off topic and then occasionally pop back on topic!
by 1024MAK
Thu Nov 23, 2017 10:55 am
Forum: off-topic
Topic: Which soldering iron?
Replies: 44
Views: 563

Re: Which soldering iron?

Rosin vapour condenses back into solid rosin inside your lungs, and doesn't come out. :shock: :shock: :shock: Neither does stone dust particles, and apparently, now carbon fibre dust is thought to be a problem. And it's been recommended for many years now, that you try not to inhale the fumes durin...
by 1024MAK
Thu Nov 23, 2017 10:50 am
Forum: off-topic
Topic: Which soldering iron?
Replies: 44
Views: 563

Re: Which soldering iron?

Ordered a small kit of that :) The resistor is for the little board on here: https://nfggames.com/nfg/x68repair/ This is what I ordered http://www.ebay.co.uk/itm/2W-4-7K-ohm-Chunky-Resistor-5-Yellow-Violet-Red-Gold/122573886694?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649 A resist...
by 1024MAK
Wed Nov 22, 2017 11:25 pm
Forum: off-topic
Topic: Grump grump grump
Replies: 14
Views: 366

Re: Grump grump grump

Stephen, sorry about your father. My father died after a long illness about 18 months ago :( . Dementia destroyed not only my dads brain, but robbed us of a loved family member bit by bit over the past ten years. There is nothing anyone can say that will help you, or the family. Only time and fond m...
by 1024MAK
Wed Nov 22, 2017 8:56 pm
Forum: hardware
Topic: ZX81 emulator
Replies: 29
Views: 706

Re: ZX81 emulator

To be honest I mainly suggested it as an excuse to use the rather poor SpectROM pun but if it was actually possible that would be something! As I mentioned at the ABUG weekend, there was a hardware Spectrum emulator for the Tatung Einstein called the "Speculator"! I think SpectROM is a be...
by 1024MAK
Wed Nov 22, 2017 3:31 pm
Forum: off-topic
Topic: Which soldering iron?
Replies: 44
Views: 563

Re: Which soldering iron?

You probably won't regret buying something like this if you haven't already got one. This one isn't necessarily a recommendation, just the first one that popped up. Nah, that's no fun. You can't beat having to improvise when you don't remember to bring all your tools and accessories, so have to nic...
by 1024MAK
Wed Nov 22, 2017 9:03 am
Forum: off-topic
Topic: Which soldering iron?
Replies: 44
Views: 563

Re: Which soldering iron?

Me on about my soldering irons... http://stardot.org.uk/forums/viewtopic.php?f=11&t=9459#p110119 http://stardot.org.uk/forums/viewtopic.php?f=3&t=3981&start=150#p35495 http://stardot.org.uk/forums/viewtopic.php?f=3&t=5238&p=48375#p48375 http://stardot.org.uk/forums/viewtopic.php?...
by 1024MAK
Wed Nov 22, 2017 8:11 am
Forum: hardware
Topic: ZX81 emulator
Replies: 29
Views: 706

Re: ZX81 emulator

All the gory details of how the ZX81 (and ZX80) display system works are on these web sites: ZXdocs (Martin Korth) Wilf Rigter's ZX Video Tutorial (see notes below) Wilf Rigter's ZX Video Tutorial (mirror) (see notes below) Wilf Rigter's web pages will display incorrect characters and symbols. The d...
by 1024MAK
Tue Nov 21, 2017 10:12 pm
Forum: upcoming and recent events & exhibitions
Topic: ABug Manchester Friday 19th - Sunday 21st January 2018
Replies: 21
Views: 488

Re: ABug Manchester Friday 19th - Sunday 21st January 2018

Please put me down as a maybe (have to negotiate time off). The following weekend (26th -28th January) is better for me, as I have no commitments for this. Also possible are the first two weekends in February. I will be most likely be traveling by train this time, so how close is the venue to Manche...
by 1024MAK
Tue Nov 21, 2017 12:19 am
Forum: hardware
Topic: ZX81 emulator
Replies: 29
Views: 706

Re: ZX81 emulator

=D> =D> =D>

Mark
by 1024MAK
Sun Nov 19, 2017 10:56 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 139
Views: 4519

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

Photos as promised... IMG_5688.JPG IMG_5690.JPG IMG_5691.JPG IMG_5692.JPG IMG_5693.JPG IMG_5694.JPG IMG_5695.JPG IMG_5696.JPG IMG_5697.JPG IMG_5698.JPG IMG_5699.JPG IMG_5700.JPG IMG_5701.JPG IMG_5702.JPG IMG_5703.JPG IMG_5704.JPG IMG_5705.JPG IMG_5706.JPG IMG_5707.JPG IMG_5708.JPG IMG_5709.JPG IMG_5...
by 1024MAK
Sun Nov 19, 2017 9:01 pm
Forum: off-topic
Topic: Repairing Adventures for your BBC micro
Replies: 7
Views: 284

Re: Repairing Adventures for your BBC micro

@pau1ie - absolutely fascinating captain 8)

Thanks for posting =D>

The things you learn about on StarDot! :D :lol:

Warp speed...!

Mark
by 1024MAK
Sun Nov 19, 2017 7:34 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 139
Views: 4519

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

as otherwise it would be me standing in an empty room , asking myself stupid questions. =D> =D> =D> =D> Careful what you wish for Alex, you may find people would pay money for that :shock: (although it may be more like people tossing coppers at you :lol: ). @Robert, you were making progress, learni...
by 1024MAK
Sun Nov 19, 2017 6:43 pm
Forum: hardware
Topic: Mods and ROMS
Replies: 13
Views: 459

Re: Mods and ROMS

rune wrote:Just fallen out of the loft and hit everything on the way down. I'll check when I stop felling sick and sore.

I hope you are all right [-o<

Mark
by 1024MAK
Sun Nov 19, 2017 6:39 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 139
Views: 4519

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

After a 155 mile drive, I'm back home. A smooth drive mostly on motorway and dual carriageway. Agree that it was another excellent event :D So once again, thanks Alex =D> Got two Beeb PSU's serviced, and fixed one of the Beeb's. And started investigating the Euro-Beeb. Started by replacing the Rifa ...
by 1024MAK
Sun Nov 19, 2017 1:00 pm
Forum: hardware
Topic: Mods and ROMS
Replies: 13
Views: 459

Re: Mods and ROMS

A resistor is only needed if the control line has a manual enable/disable switch, for example, a write protect switch connected in the line to the signal /WE to pin 27.

But double check, better still, test with a meter to ensure that it is a 4.7k resistor.

Mark
by 1024MAK
Sun Nov 19, 2017 9:59 am
Forum: hardware
Topic: read / write to JIM
Replies: 28
Views: 614

Re: read / write to JIM

I think that maybe Acorn may not have fully thought the idea through, given how much RAM cost at the time that the Beeb was designed.

Mark
by 1024MAK
Sat Nov 18, 2017 11:20 pm
Forum: hardware
Topic: Electron Joystick interface and 'pokable' ports
Replies: 17
Views: 471

Re: Electron Joystick interface and 'pokable' ports

It would be best if the CPU Phase 0 clock (shown in Acorn documentation as phase 2, but the actual signal on the expansion port has been found to be phase 0, it appears Acorn dropped the ball, as it should have been the phase 2 signal...) is included in the control logic. The reason being, is that t...
by 1024MAK
Sat Nov 18, 2017 2:32 pm
Forum: wanted
Topic: WTB: 5.25" Floppies
Replies: 15
Views: 252

Re: WTB: 5.25" Floppies

What type of disks are they? The last IBM/PC disks were high density and have a different magnetic coating. They are not normally suitable. Also I f a disk has a alien format, the quickest, easiest method is to erase them using a bulk eraser. But as not many people have one, stick them next to a pow...
by 1024MAK
Fri Nov 17, 2017 11:55 pm
Forum: wanted
Topic: WTB: 5.25" Floppies
Replies: 15
Views: 252

Re: WTB: 5.25" Floppies

There is another possible cause of trouble. If the disks were originally used with a 40 track drive, the width of the head on a 40 track drive is wider than the head in an 80 track drive. So the 80 track drive may not be able to override all of the magnetic field made by the 40 track drive... Mark
by 1024MAK
Fri Nov 17, 2017 9:26 am
Forum: for sale / freebies
Topic: Thinking of selling some of my collection...
Replies: 7
Views: 221

Re: Thinking of selling some of my collection...

Note that I have edited my post above...
by 1024MAK
Fri Nov 17, 2017 9:22 am
Forum: for sale / freebies
Topic: Thinking of selling some of my collection...
Replies: 7
Views: 221

Re: Thinking of selling some of my collection...

@Stephen It may help if you let people know whereabouts you are in the world, as some potential buyers may want to collect. While others may need this information in order to get an idea of postage costs... When adding attachments, you can use the "Place inline" button, then you can copy a...
by 1024MAK
Fri Nov 17, 2017 9:11 am
Forum: hardware
Topic: EEPROM - the Holy Grail of Sideways Rom?
Replies: 342
Views: 26311

Re: EEPROM - the Holy Grail of Sideways Rom?

In my case, it's more of a "not discovered the limitations due to being too lazy and or too busy, or distracted by other shiny new items"... So, with Martin's tools, I have never bothered with the softlock, as I use a physical write protect switch. I have also never tried the checksum comm...

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