Search found 2943 matches

by duikkie
Tue May 21, 2019 2:48 pm
Forum: hardware
Topic: A5000 link setting ?
Replies: 8
Views: 377

A5000 link setting ?

i am trying to get live to a dead A5000 i have downloaded Main PCB links i have a problem with link 10 default is shunt 1-3 and 2-4 , i think the a5000 has 1-2 and 3-4 NON jedec 512k type ?? there are 4 roms with 834000a 51h till 54h is this non jedec 512k type or default jedec 1,2,4 and 8mb roms an...
by duikkie
Fri May 17, 2019 5:37 am
Forum: hardware
Topic: BBC PSU problems
Replies: 21
Views: 583

Re: BBC PSU problems

i think it is a flyback problem , because there is a spike ???
by duikkie
Fri May 17, 2019 5:31 am
Forum: hardware
Topic: BBC PSU problems
Replies: 21
Views: 583

Re: BBC PSU problems

somewhere , some time ago i have posted some pictures making a bbc psu. allso how to diagnost a problem . disconnecting the flyback and the second part of the psu . so you can measure the ac sec side, make sure you disconnect the caps on the second side because the ac can get to 50 volt and the caps...
by duikkie
Thu May 16, 2019 12:31 pm
Forum: hardware
Topic: a5000 not working where to probe
Replies: 2
Views: 314

Re: a5000 not working where to probe

thanks for the links :) it is the board from paul :) so if i have time i will probe it i have NOT a hsync or v/csync on link lk6 rout,gout,bout all not good ( stable white ?) but if ic9 is not getting right signals then chip 9 not working i think where is IOEB chip ? https://stardot.org.uk/forums/vi...
by duikkie
Tue May 14, 2019 5:20 pm
Forum: hardware
Topic: a5000 not working where to probe
Replies: 2
Views: 314

a5000 not working where to probe

i am new :) at a5000 fixing

where to probe ?

is there a list ?

where is IOEB chip ?
by duikkie
Tue Apr 23, 2019 9:10 am
Forum: software: other
Topic: Watford Electronics Diagnostic Disc question
Replies: 7
Views: 425

Re: Watford Electronics Diagnostic Disc question

why not use a formatting program ?
then you see which track is bad :)

a format program normally seek, write E5 to every track on disc
by duikkie
Tue Apr 23, 2019 9:07 am
Forum: software: other
Topic: Watford Electronics Diagnostic Disc question
Replies: 7
Views: 425

Re: Watford Electronics Diagnostic Disc question

if it is a basic program , remove the on error goto line .

if the disc is formatting and writting and reading till track 80
then it can be a program fault . maybe page is wrong ?
by duikkie
Wed Apr 17, 2019 4:46 am
Forum: hardware
Topic: Last Gasp for the 8271
Replies: 12
Views: 634

Re: Last Gasp for the 8271

i like the 8271 chip , nice things to program. and make protected discs :shock: :D
by duikkie
Wed Apr 10, 2019 6:22 pm
Forum: software: other
Topic: Copy tape images on the BBC
Replies: 10
Views: 645

Re: Copy tape images on the BBC

maybe to simple but why not load in the bbc and then use the *tape and *save command to make a copy on your tape ?
by duikkie
Wed Apr 03, 2019 5:27 pm
Forum: hardware
Topic: Elektuur turbo board for the Electron
Replies: 15
Views: 610

Re: Elektuur turbo board for the Electron

die Engelse moeten gewoon nederlands leren :D dat veel handiger
by duikkie
Wed Mar 27, 2019 6:14 am
Forum: hardware
Topic: all you van tell about a5000
Replies: 8
Views: 456

Re: all you van tell about a5000

i did have problems with the link and the zip file. rember we love old computers. my pc is working with windows XP en reader 8. :shock: , i have updated reader to version 11. so now i can reader thinks :) so do make a note which version your pdf or zip file is using [-o< no schematic anywhere like b...
by duikkie
Tue Mar 26, 2019 6:42 pm
Forum: hardware
Topic: all you van tell about a5000
Replies: 8
Views: 456

Re: all you van tell about a5000

no schematic anywhere like by bbc b board ?

the main board the 8583 rtc chip is missing , will a ds1307 do ? chear chip in china :)

so if anyone has scoop picture and testpoints on the board of a5000 please tell !
by duikkie
Mon Mar 25, 2019 10:29 am
Forum: hardware
Topic: all you van tell about a5000
Replies: 8
Views: 456

Re: all you van tell about a5000

are there scoop test points ?

check if 5 volt is on the board ?
clk ?

i think the board is very bad in condition
so i have to start from zero
by duikkie
Mon Mar 25, 2019 8:26 am
Forum: hardware
Topic: all you van tell about a5000
Replies: 8
Views: 456

Re: all you van tell about a5000

maybe i wrote it wrong

i have only the motherboard no even a powersuply

so dianostic and good schematic where to look first with my scoop

what is the min config ?

no picture yet
by duikkie
Sat Mar 23, 2019 4:35 pm
Forum: hardware
Topic: all you van tell about a5000
Replies: 8
Views: 456

all you van tell about a5000

I am New with a5000 and i have a a5000 ver bad so a good schematic and tech Manual Will help links ?
by duikkie
Mon Mar 18, 2019 9:48 am
Forum: off-topic
Topic: Computing pi in a very unusual way
Replies: 10
Views: 520

Re: Computing pi in a very unusual way

what happens with n=1 ? or n=0 ?
by duikkie
Mon Mar 18, 2019 9:44 am
Forum: hardware
Topic: Where to get a none yellowed case - retrobright?
Replies: 8
Views: 307

Re: Where to get a none yellowed case - retrobright?

be careful with h202 !!! in hair products this is 3% in mouth products it is 1% , don't use the real stuff is 30% :shock:

it makes plastic not stronger !! because it breaks down more then the yellow ( sigaret ) stuff
by duikkie
Sat Mar 09, 2019 4:42 am
Forum: hardware
Topic: Turbo MMC Problem
Replies: 17
Views: 616

Re: Turbo MMC Problem

A card ? Errol is mostly a sd card problem . Sd card is not old ! Turbo mcc and rom use old protocol
by duikkie
Wed Feb 27, 2019 7:14 am
Forum: hardware
Topic: SD Card readers
Replies: 10
Views: 538

Re: SD Card readers

i am not good in searching but the smart-spi rom is somewhere in a item on this forum :) hopefully you can read and understand how it works. for MM .. rom there is and other place far far far far way :) I've not looked yet, but do these SD card ROMs have source code hanging about somewhere? Are they...
by duikkie
Tue Feb 26, 2019 7:23 am
Forum: introduce yourself
Topic: Hello from the Netherlands ;-)
Replies: 17
Views: 765

Re: Hello from the Netherlands ;-)

gewoon welkom tussen al die Engelse mensen hier .
en een paar nederlandse gekke :)

welcome between all the english people here
and a few dutch ones.

Use SMART-SPI instead of MM... rom :) for beeb b :lol:
by duikkie
Sat Feb 16, 2019 6:51 am
Forum: hardware
Topic: My new beeb - A to B? But why no analogue?
Replies: 19
Views: 741

Re: My new beeb - A to B? But why no analogue?

Take a picture of thee pcb board in totale The bbc was a learning computer and te analoge port was for. Play ing :)
by duikkie
Sun Feb 03, 2019 11:54 am
Forum: hardware
Topic: Tube port fault?
Replies: 7
Views: 438

Re: Tube port fault?

Use an other sd card. Hello again! No news 'till today. I replaced the near 6522 but with no result. I unplugged all the eproms except from Basic and OS, i placed a NFS(I tried also a DNFS eprom) eprom, but with no avail. I get the same symptom when i just plug the flat cable. What i am trying to do...
by duikkie
Sun Jan 06, 2019 10:00 am
Forum: hardware
Topic: Tube port fault?
Replies: 7
Views: 438

Re: Tube port fault?

The bbc waits for second processor i think
by duikkie
Fri Dec 14, 2018 8:40 am
Forum: hardware
Topic: White stuff on pin connectors and jumpers
Replies: 12
Views: 493

Re: White stuff on pin connectors and jumpers

dust to dust , who wants to live forever :)
daveejhitchins wrote:
Fri Dec 14, 2018 7:35 am
Electron keyboard connectors seem to be prone to the white-dust. I just clean with a dry brush, first, then my best toothbrush and IPA. As to the question: will it return? I'll let you know in another 20 years :wink:

Dave H :D
by duikkie
Thu Dec 13, 2018 10:01 am
Forum: hardware
Topic: White stuff on pin connectors and jumpers
Replies: 12
Views: 493

Re: White stuff on pin connectors and jumpers

i think it is not a plastic additive or softener. to much for it. i am more thinking it is a procduct of electrolyse ( if that is the engish :) , i have to look in my old schoolbooks what it can be between null volt and 5 volt. but it can be a combi if it is only stuff that is there when electric is...
by duikkie
Tue Nov 27, 2018 6:01 pm
Forum: hardware
Topic: BBC B repair help
Replies: 36
Views: 1791

Re: BBC B repair help

try *basic :) , maybe and other rom handles the *b.
by duikkie
Wed Nov 07, 2018 6:31 am
Forum: hardware
Topic: The best SD card reader for the Beeb?
Replies: 19
Views: 829

Re: The best SD card reader for the Beeb?

Do not forget that old dutchman😆 there is a mmb solution fit te tube port that i think not a problemen with pi tube it is called usb smart forum tube with a China usb chip . it was a project wit software Finding it in this forum is difficult i know
by duikkie
Mon Oct 29, 2018 9:13 am
Forum: hardware
Topic: Some noob questions: BBC B+ and MMC
Replies: 7
Views: 496

Re: Some noob questions: BBC B+ and MMC

for bbc + the mm.... the right one works better because of the page the smart-spi will always work :) , but page at &1900 further smart-spi has things that mm.... ? do not have like *dput and *dget mm.. ?? has a few other commands i think smart-spi is the best rom every for bbc :oops: :^o [-X :shock...
by duikkie
Tue Oct 16, 2018 11:52 am
Forum: software: other
Topic: What will stop ADI2 accessing DFS Track 0?
Replies: 17
Views: 796

Re: What will stop ADI2 accessing DFS Track 0?

oke what did you try so far ? try to read track 0 ID markers , with a simple machine code program in the advanced disc book try this with more then 10 sectors , maybe 20 or 50 ? preform a seek 0 , before you read id numbers on track 0 maybe you hear the arm moving ? if not then track 0 is track 0 :)...
by duikkie
Sat Oct 13, 2018 3:27 am
Forum: software: other
Topic: What will stop ADI2 accessing DFS Track 0?
Replies: 17
Views: 796

Re: What will stop ADI2 accessing DFS Track 0?

the intresse thing is what happens if the disk drive controller can not make sense and it is not a error :) , a disc drive controller trys a lot ( the 8271) before it report an error. then comes the dfs mostly programmed for BBC standaard discs format. and is not that good if something is different....