Search found 64 matches

by mark71
Thu Jul 09, 2020 12:25 pm
Forum: 8-bit acorn hardware
Topic: Acorn Electron problem flashing picture and lines
Replies: 26
Views: 1272

Re: Acorm Electron problem flashing picture and lines

traindriver69 wrote:
Thu Jul 09, 2020 10:18 am
Hi
problem is I get the same through the video connection with a phono lead.
Have you tried a RGB to Scart lead?
by mark71
Thu Jun 18, 2020 7:45 pm
Forum: 32-bit acorn hardware
Topic: Replacing A5000 CMOS chip
Replies: 6
Views: 780

Re: Replacing A5000 CMOS chip

Hi All

Working on a veroboard RTC CMOS replacement, based off of the website on retro-kit.co.uk, I have a question as want to replace the diode from the +5v D15 on the Circuit diagrams any recommendations for a non SMC equivalent?, IN4148?

Mark
by mark71
Thu Jun 04, 2020 9:32 pm
Forum: past all-day virtual ABugs
Topic: All-day 'Virtual' Acorn session #4, Saturday 6th June 2020, 9am - 10pm - NOW FULL
Replies: 119
Views: 8755

Re: All-day 'Virtual' Acorn session #4, Saturday 6th June 2020, 9am - 10pm

Hi All

If there are any spaces left, put me down for all of the day, I’ll be in and out depending on my two children.

Mark
by mark71
Tue Jun 02, 2020 5:47 am
Forum: 32-bit acorn hardware
Topic: RiscPC/Archimedes Monitor recommendations?
Replies: 8
Views: 935

Re: RiscPC/Archimedes Monitor recommendations?

danielj wrote:
Sun May 24, 2020 10:22 am
BenQ BL912 or BL702 both have VGA connectors and also can display the 15kHz modes without needing an adaptor.

d.

Thanks for the tip, bought a BL702A from Amazon for 94.99, works a treat on the A420/1 and the RiscPC, 1280x1024 for the the latter really nice picture too.

Mark
by mark71
Sun May 24, 2020 9:47 pm
Forum: 8-bit acorn hardware
Topic: Dead Elk, any ideas?.
Replies: 44
Views: 2509

Re: Dead Elk, any ideas?.

:^o Hi I get the same screen as the one that you've posted, but it's only when I put my Slogger Pegasus into my Plus 1. I was wondering what issue pcb you have in yours, an Issue A by any chance? All Issue 4 PCB. I did try a good working ULA in it and no joy, thinking it could be the 6502 in both c...
by mark71
Sun May 24, 2020 10:07 am
Forum: 8-bit acorn hardware
Topic: Dead Elk, any ideas?.
Replies: 44
Views: 2509

Re: Dead Elk, any ideas?.

Hi All On further investigation with a different monitor/tv am getting the above pink colour distortion, also when switching off am now hearing the cassette motor relay click, so guessing that as others concluded the ULA is dead. IMG_6010.jpg Also with another Elk just aquired via ebay a similar thi...
by mark71
Sun May 24, 2020 9:55 am
Forum: 32-bit acorn hardware
Topic: RiscPC/Archimedes Monitor recommendations?
Replies: 8
Views: 935

RiscPC/Archimedes Monitor recommendations?

Hi All A quick question but most likely a complex answer, what are your recommendations for sourcing a LCD replacement montiors that will work with RiscPC's?, having a AFK18 monitor that still works but am looking for something a bit more modern and not so bulky to use on my venerable 32bit Acorn ki...
by mark71
Mon May 04, 2020 9:19 pm
Forum: 8-bit acorn hardware
Topic: Dead Elk, any ideas?.
Replies: 44
Views: 2509

Re: Dead Elk, any ideas?.

did it get struck with lighting?? or did you pull anything out the Plus1 two cart slots while it was using them, or drop it off the side of a table??? had lots of elks in different states / faults, always got some screen garbage , then fixed them. have you tried both RGB & AV out to TV :? Well ...
by mark71
Sun May 03, 2020 7:28 pm
Forum: 8-bit acorn hardware
Topic: Dead Elk, any ideas?.
Replies: 44
Views: 2509

Re: Dead Elk, any ideas?.

Assuming that you have disconnected the Plus 1, is the +5V power actually getting to any of the chips? E.g. pin 8 of the 6502. What voltage do you get on pin 40 of the 6502? Apart from a multimeter, do you have any other test gear, if yes, what? Mark Pin 8 5volts, pin 40 0volts I do have a scope, n...
by mark71
Sun May 03, 2020 7:14 pm
Forum: 8-bit acorn hardware
Topic: Dead Elk, any ideas?.
Replies: 44
Views: 2509

Re: Dead Elk, any ideas?.

Let's start with basics: Disconnect everything from the Electron - except the power-in plug. I know you've done some of this already, however, let's have the results written down . . . Measure the Voltage at these points (everything ON the Electron Main PCB): (sorry if the is an egg-sucking lesson!...
by mark71
Sun May 03, 2020 12:22 pm
Forum: 8-bit acorn hardware
Topic: Dead Elk, any ideas?.
Replies: 44
Views: 2509

Re: Dead Elk, any ideas?.

Assuming that you have disconnected the Plus 1, is the +5V power actually getting to any of the chips? E.g. pin 8 of the 6502. What voltage do you get on pin 40 of the 6502? Apart from a multimeter, do you have any other test gear, if yes, what? Mark Pin 8 5volts, pin 40 0volts I do have a scope, n...
by mark71
Sat May 02, 2020 8:23 pm
Forum: 8-bit acorn hardware
Topic: Dead Elk, any ideas?.
Replies: 44
Views: 2509

Re: Dead Elk, any ideas?.

Well, the first place to start is my previous question :D - is it completely dead, or is something displayed (white bars, red/yellow pattern)? Does the cassette relay click when you turn it on? d. Sorry :roll: , completely dead, no display, no beep, no click of relay, no Led. Power coming from supp...
by mark71
Sat May 02, 2020 8:14 pm
Forum: 8-bit acorn hardware
Topic: Dead Elk, any ideas?.
Replies: 44
Views: 2509

Re: Dead Elk, any ideas?.

Check the ULA socket for broken pins. It may not look obvious initially. I had a similar issue, which is discussed in this post. Well had another go today, popped the ULA and checked, looks ok to me no broken pins and no life. What’s the best thing to probe for to check for life?, what does it chec...
by mark71
Fri May 01, 2020 8:04 pm
Forum: 8-bit acorn hardware
Topic: b+ and Gotek problems
Replies: 7
Views: 543

Re: b+ and Gotek problems

May seem a daft question, did you push the knob in after selecting a disk?, as it needs to mount the drive. I had the the same issue, works if you push in the button....

Mark
by mark71
Sun Apr 26, 2020 8:44 pm
Forum: 8-bit acorn hardware
Topic: Dead Elk, any ideas?.
Replies: 44
Views: 2509

Dead Elk, any ideas?.

Hi All After getting the Gotek drive to work, using a Elk with Plus 1 and Slogger DFS interface the said Elk after using it wouldn't boot up, no light, no reassuring beeep. I have opened the old girl up, checked the PSU, power coming out +5/-5 and AC, took out the ULA and reseated it, still no joy. ...
by mark71
Sat Apr 25, 2020 9:48 pm
Forum: 8-bit acorn hardware
Topic: BBC Master with Gotek disc light comes on and doesn't list
Replies: 5
Views: 541

Re: BBC Master with Gotek disc light comes on and doesn't list

Hi All Thanks for all the advice, figured out why it didn't work in the end, operator error, didn't read the manual properly, once a disk is selected, one needs to press it in to mount it, then one can list it's content, doh. What i did do was to test it first on a electron with a slogger 400 dfs di...
by mark71
Fri Apr 24, 2020 10:18 am
Forum: 8-bit acorn hardware
Topic: BBC Master with Gotek disc light comes on and doesn't list
Replies: 5
Views: 541

BBC Master with Gotek disc light comes on and doesn't list

Hi All Just bought a Gotek drive for the BBC Master, and plugged it in and switched on no problem, the issue is when i try to list the contents of the drive the light just comes on and stays on and just hangs there waiting for something?, any ideas?. DFS 2.24 and ADFS at 1.5, stock BBC Master, re-ca...
by mark71
Sun Apr 12, 2020 8:14 pm
Forum: 8-bit acorn hardware
Topic: Fixing BBC Master non functioning Keys
Replies: 2
Views: 289

Fixing BBC Master non functioning Keys

Hi All Not sure if anyone has mentioned about the BBC Master Keys, but from today's repairs would like to impart my experience. As part of the collection of Acorn kit, i have a BBC Master bought off ebay over 10years ago, fixed the CMOS Battery, and the usual caps as they went pop and smoke. Once th...
by mark71
Thu Apr 09, 2020 9:54 pm
Forum: 8-bit acorn software: other
Topic: Educational Games for 3-5year olds, any Recommendations?
Replies: 7
Views: 817

Re: Educational Games for 3-5year olds, any Recommendations?

That is a 'feature'. :wink: The search algorithm looks for a match on the first age and then checks for any programs that are from the first age to less than or equal to the last age. A search for an age that is less than the start age will not produce any results. A search for a start age that is ...
by mark71
Wed Apr 08, 2020 9:56 pm
Forum: 8-bit acorn hardware
Topic: Acorn Electron online? Any such hardware.
Replies: 160
Views: 11893

Re: Acorn Electron online? Any such hardware.

You're asking this question a little bit too soon, so now I have to reveal my secret project..... I am working on an interface for the Atom to use an ESP8255 wifi module to communicate with the Internet. It's nothing new and some people here have also worked or played with it. My base set up will b...
by mark71
Wed Apr 08, 2020 9:42 pm
Forum: 32-bit acorn hardware
Topic: Replacing A5000 CMOS chip
Replies: 6
Views: 780

Re: Replacing A5000 CMOS chip

You could buy the podule based replacement - http://www.cjemicros.co.uk/micros/individual/newprodpages/prodinfo.php?prodcode=CJE-RTCPOD If you don't want to build it yourself. It's an option i've considered, but as have not much to loose, and enjoy a challenge in solving problems and a bit more tim...
by mark71
Tue Apr 07, 2020 9:33 pm
Forum: 32-bit acorn hardware
Topic: Replacing A5000 CMOS chip
Replies: 6
Views: 780

Replacing A5000 CMOS chip

Hi All After cleaning up the A5000 mother board from the battery leak damage, in which the CMOS Chip fell off in the process.... I have a question about replacing it and seeing if it will boot to the desktop. I did try firing up the old girl without the chip and got the Red screen then a blank scree...
by mark71
Tue Apr 07, 2020 1:15 pm
Forum: 32-bit acorn hardware
Topic: Reserrecting my old A420/1
Replies: 7
Views: 793

Re: Reserrecting my old A420/1

What helped with me is switch it on after a moment switch it off and do that a couple of times. You can be lucky that the ST506 comes back to life. Hi Tim I tried that, but it is dead as a door nail, but all my floppies seem to be ok so, once the drive is replaced with a modern solid state device w...
by mark71
Mon Apr 06, 2020 9:14 pm
Forum: 32-bit acorn hardware
Topic: Reserrecting my old A420/1
Replies: 7
Views: 793

Re: Reserrecting my old A420/1

What helped with me is switch it on after a moment switch it off and do that a couple of times. You can be lucky that the ST506 comes back to life. Hi Tim I tried that, but it is dead as a door nail, but all my floppies seem to be ok so, once the drive is replaced with a modern solid state device w...
by mark71
Sun Apr 05, 2020 10:54 am
Forum: 8-bit acorn software: other
Topic: Educational Games for 3-5year olds, any Recommendations?
Replies: 7
Views: 817

Re: Educational Games for 3-5year olds, any Recommendations?

Hah! With one question you have highlighted a gap in the searching algorithms for my archive! :( I'll see if I can fix that today. In the meantime you could try some of these; Micro Primer Mr T`s Alphabet Games Mr T`s Measuring Games Mr T`s Money Box Mr T Tells the Time Mr T`s Shape Games First Ste...
by mark71
Sun Apr 05, 2020 8:03 am
Forum: 32-bit acorn hardware
Topic: Reserrecting my old A420/1
Replies: 7
Views: 793

Re: Reserrecting my old A420/1

Final problem is the harddrive, after over 10years of not working and old age the ST-506 when clicking on the icon in 3.11 it hangs then gives a disc error, RiscOS 2.0 it just froze the machine. So it think this is beyond all hope of life, will give it a good soak test and see if it comes back to l...
by mark71
Sun Apr 05, 2020 7:59 am
Forum: 8-bit acorn software: other
Topic: Educational Games for 3-5year olds, any Recommendations?
Replies: 7
Views: 817

Educational Games for 3-5year olds, any Recommendations?

Hi All

Anyone got some good recommendations for 8bit learning games numbers/letters and other suitable for 3-5year olds?, start getting my two children ready to use computers for there future as IT hackers :D . Eldest likes Hopper on the Elk.

Mark
by mark71
Sun Apr 05, 2020 7:44 am
Forum: 32-bit acorn hardware
Topic: Reserrecting my old A420/1
Replies: 7
Views: 793

Re: Reserrecting my old A420/1

Hi Ian

Sounds like a plan, PM with a contact method, would like the formatted 512mb option :D .

Mark
by mark71
Sat Apr 04, 2020 9:43 pm
Forum: 8-bit acorn hardware
Topic: My Beeb inspection
Replies: 20
Views: 1201

Re: My Beeb inspection

Hi Camsoft2000

One thing has as the PSU been re-capped?. If not it will go pop at some point..... Happened to me with the Master, put the beeb back together after a complete re-cap kit from RetroClinic, worked a treat.

Mark.
by mark71
Sat Apr 04, 2020 9:25 pm
Forum: 32-bit acorn hardware
Topic: Reserrecting my old A420/1
Replies: 7
Views: 793

Reserrecting my old A420/1

Hi All Just thought i'd pass on some notes for others in the future, i have been spending my free time on lock down, going through my retro collection and see what works and doesn't and repairing them to get working. Today was reserecting the A420/1 and putting the Beeb back together after a complet...

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