Search found 1837 matches

by steve3000
Mon Jun 18, 2018 10:47 pm
Forum: hardware
Topic: Atomwide A5000 8MB
Replies: 8
Views: 269

Re: Atomwide A5000 8MB

As above, the upgrade needed the original A5000 pcb to be modified. I once owned an original A5000 that had been modified to take a simtech 4-8mb upgrade, the pcb modifications were probably similar to what the Atomwide board needs: the obvious socket fitted for the MEMC, then the two large axial ca...
by steve3000
Sun Jun 17, 2018 12:21 pm
Forum: hardware
Topic: Atomwide A5000 8MB
Replies: 8
Views: 269

Re: Atomwide A5000 8MB

I have one identical to that in my A5000 :) It's provides an additional 2mb to the A5000, bringing it up to 4mb, the extra tracking would provide a further 4mb and dual MEMC sockets - and would plug into the MEMC socket on the A5000's pcb. From my own investigations a few years back, I was confident...
by steve3000
Sun Jun 17, 2018 7:22 am
Forum: hardware
Topic: Disc drive led: what drives it?
Replies: 9
Views: 251

Re: Disc drive led: what drives it?

Well done on identifying IC42, I've had to replace this on a battery damaged A5000 in the past too. Other two ICs I've had problems with are the buffers for the IDE HDD data lines, so keep an eye on these if you HDD doesn't function in future. For the HDD LED, there's a track which runs across the w...
by steve3000
Sat Jun 09, 2018 6:20 pm
Forum: hardware
Topic: Early BBC Micro's (ICL)
Replies: 9
Views: 522

Re: Early BBC Micro's (ICL)

Here's my issue 2 model A, Cleartone manufactured, serial 100403 and all chips socketted which is very nice :) It's in great condition, so I don't want to modify (other than easily reversible) but it is rather limited without any ports...! I'm currently working up a reliable and reversible fitment ...
by steve3000
Sat Jun 09, 2018 7:39 am
Forum: general
Topic: How far gone must a BBC be to be unfixable?
Replies: 23
Views: 775

Re: How far gone must a BBC be to be unfixable?

All depends on time/effort you are willing to put into repairs and if you are treating it as a hobby/learning exercise. With Commodore people, it seems to be when the board tracks have utterly perished. That's probably my personal limit as well. I'm game for repairing a small number of traces, but i...
by steve3000
Sat Jun 09, 2018 7:28 am
Forum: hardware
Topic: IDE interfaces - hardware details
Replies: 29
Views: 984

Re: IDE interfaces - hardware details

This is brilliant, many thanks for sharing your work Ian!
by steve3000
Sat Jun 09, 2018 7:23 am
Forum: hardware
Topic: Formatting SD/CF cards for use on RISC OS 3.1
Replies: 62
Views: 17999

Re: Formatting SD/CF cards for use on RISC OS 3.1

Also I suspect this thread will be very useful to others who are wanting to backup old HDDs onto SD cards, but it has strayed off topic from the original title "Formatting SD/CF cards for use on RISC OS 3.1" - so I wonder if one of the forum mods could maybe move the backing up HDD topics into a thr...
by steve3000
Sat Jun 09, 2018 7:17 am
Forum: hardware
Topic: Formatting SD/CF cards for use on RISC OS 3.1
Replies: 62
Views: 17999

Re: Formatting SD/CF cards for use on RISC OS 3.1

Well done, what an excellent result to have safely backed up your HDD! =D> I tried running every single application from my hard drive on my Pi and only one program ran, and then crashed :( Pi is definitely not a solution for running programs, at least in my case. Almost everything complained about ...
by steve3000
Thu Jun 07, 2018 6:19 pm
Forum: hardware
Topic: Early BBC Micro's (ICL)
Replies: 9
Views: 522

Re: Early BBC Micro's (ICL)

Here's my issue 2 model A, Cleartone manufactured, serial 100403 and all chips socketted which is very nice :) It's in great condition, so I don't want to modify (other than easily reversible) but it is rather limited without any ports...! I'm currently working up a reliable and reversible fitment o...
by steve3000
Tue Jun 05, 2018 10:31 pm
Forum: hardware
Topic: US BBC micro restoration - help (and PSU) needed
Replies: 23
Views: 959

Re: US BBC micro restoration - help needed

I'm assuming the circuit itself is pretty similar, if not identical, given that it runs normal Beeb software...(at least I'm hoping it will, when it is working!?). I know for a fact the ROMSEL circuitry is different to a regular beeb as I found when repairing my German Beeb (same as a US Beeb). I w...
by steve3000
Fri Jun 01, 2018 10:49 pm
Forum: for sale / freebies
Topic: Having a clear out
Replies: 46
Views: 1235

Re: Having a clear out

Oh, I'd be interested in the C64 if still available?

Will PM you.
by steve3000
Fri Jun 01, 2018 7:50 am
Forum: stardot.org.uk
Topic: https certificates?
Replies: 86
Views: 4255

Re: https certificates?

Interesting, just noticed the green padlock myself. Most pages seem to have it, but a few such as Page 154 of "Today I recieved" don't have the padlock, although page 153 does...
by steve3000
Wed May 30, 2018 5:42 pm
Forum: general
Topic: Master spray job
Replies: 9
Views: 254

Re: Master spray job

tn_DSCF3753.JPG
Disc Drive
tn_DSCF3755.JPG
Label gap up close
tn_DSCF3757.JPG
Process
tn_DSCF3763.JPG
Result
by steve3000
Wed May 30, 2018 5:04 pm
Forum: general
Topic: Master spray job
Replies: 9
Views: 254

Re: Master spray job

I picked up a couple of empty Master 128 cases last year. Both are very yellowed. One of them has obviously had something with a straight edge put on top such that half the case is yellow and the other cream. I suspect that such a two-tone case will not respond well to RetroBrite treatment, even mu...
by steve3000
Wed May 30, 2018 4:48 pm
Forum: programming
Topic: 12-second Mandelbrot rendering on the BBC Master!
Replies: 107
Views: 2653

Re: 12-second Mandelbrot rendering on the BBC Master!

I've just tried the latest version and it is truly amazing work! I remember waiting with eager anticipation for 20+ minutes for one of these to draw back in the day. One recommendation - can you clear the keyboard buffer at the end of a frame? The current version (well the one at the top of the thre...
by steve3000
Wed May 30, 2018 10:00 am
Forum: hardware
Topic: US BBC micro restoration - help (and PSU) needed
Replies: 23
Views: 959

Re: US BBC micro restoration - help needed

Also, does anyone know of any fault-finding information for the US Beeb? The PCB layout is completely different, along with the IC numbering and link numbers, and very few chips are socketed - similar to issue 7 beebs. So if there's a list somewhere of US Beeb IC numbers or link numbers, that would ...
by steve3000
Wed May 30, 2018 6:28 am
Forum: hardware
Topic: US BBC micro restoration - help (and PSU) needed
Replies: 23
Views: 959

Re: US BBC micro restoration - help (and PSU) needed

Might it have had its ULA swapped at some time? Does it even have/need the invention mod? Good question. Fitted a ULA to get it running. No idea if it has or needs the mod - pcb is a different layout which might make it difficult to tell, and dates from 1983, if that helps? What do I need to look f...
by steve3000
Tue May 29, 2018 9:09 pm
Forum: hardware
Topic: US BBC micro restoration - help (and PSU) needed
Replies: 23
Views: 959

Re: US BBC micro restoration - help (and PSU) needed

So first thing I did, was to switch on without a monitor connected, as I didn't have one nearby at the time... And Brrrrrr-BEEEP! :D :D :D It works! =D> ...or at least it worked ...briefly...! Plugging a monitor in revealed the following: 20180529_100817.jpg Not bad I guess for the first time powere...
by steve3000
Tue May 29, 2018 8:57 pm
Forum: hardware
Topic: US BBC micro restoration - help (and PSU) needed
Replies: 23
Views: 959

Re: US BBC micro restoration - help (and PSU) needed

After fitting the American Beeb PSU, and a quick loan from my working issue 7 beeb - we have all the missing ICs and a source of power :D I couldn't find a really clear picture of an American Beeb online (at least not one where I could easily read the IC numbers!), so hopefully this will fill the ga...
by steve3000
Tue May 29, 2018 8:53 pm
Forum: hardware
Topic: US BBC micro restoration - help (and PSU) needed
Replies: 23
Views: 959

Re: US BBC micro restoration - help (and PSU) needed

As you can see from the photo at the top of the thread, the insides of this US Beeb were a little nasty, having been used as a mouse-toilet for several years! I cleaned the PCB up back in 2016, with a nice soak in hot soapy water and a good scrub, but forgot to post the result, so here it is: 201805...
by steve3000
Tue May 29, 2018 8:47 pm
Forum: hardware
Topic: US BBC micro restoration - help (and PSU) needed
Replies: 23
Views: 959

Re: US BBC micro restoration - help (and PSU) needed

Well fast-forward almost two years, and I now have one of these: viewtopic.php?f=41&t=5594&p=203516#p203516

...so time to resurrect this resurrection thread :)

First a comparison between the American Beeb PSU (left) and the UK Beeb PSU (right):
20180522_231441.jpg
by steve3000
Sun May 27, 2018 12:02 am
Forum: software: other
Topic: Border tracing Mandelbrot generator for the Beeb
Replies: 78
Views: 5785

Re: Border tracing Mandelbrot generator for the Beeb

MANDEL was included in ARM BASIC 1.00 (assembled 14th April 1986) It was not included in the next version I can find: ARM BASIC 1.02 (25th September 1987). Just out of interest, I powered up my Arthur 0.3 A310 today and had a look for the MANDEL keyword in it's ARM BASIC v1.00, but it's not present...
by steve3000
Sun May 20, 2018 2:08 pm
Forum: general
Topic: Today I received.....
Replies: 4658
Views: 312739

Re: Today I received.....

Thanks to Retroclinic, yesterday I received this rather unusual beast:
tn_20180520_145225.jpg
So hopefully I can finally fix this.
by steve3000
Sat May 19, 2018 6:56 pm
Forum: hardware
Topic: Vectorlight's A3010 IDE mod : step by step guide
Replies: 71
Views: 6080

Re: Vectorlight's A3010 IDE mod : step by step guide

This was the last IDE board I've got, hope everyone out there with one of them managed to get it working :?: Great to see you've got it into your expanded Adelaide A3010, what a machine that must be! Interesting to see also because you have a very low lying Adelaide board, mine is on much higher le...
by steve3000
Thu May 17, 2018 5:52 am
Forum: hardware
Topic: SD cards which don't work with MMFS/SmartSPI/etc.
Replies: 13
Views: 339

Re: SD cards which don't work with MMFS/SmartSPI/etc.

Have you checked that the 128mb cards are real and not those fake capacity ones that lurk on places like Ebay and Alibaba? Great thought, and useful tools thanks, but i don't think anyone is trying to fake a 128mb ( not gb) card. If anything this would be a larger capacity card cut down to 128mb as...
by steve3000
Wed May 16, 2018 10:38 pm
Forum: hardware
Topic: SD cards which don't work with MMFS/SmartSPI/etc.
Replies: 13
Views: 339

Re: SD cards which don't work with MMFS/SmartSPI/etc.

hoglet wrote:There is a debug build of MMFS that (U/MMFSDBG.rom) that logs the SPI commands sent to the card, and the responses.
Thanks Dave - just tried this, and upon issuing *CARD, I get about 40 rows of "FF400000000095:FF" before it returns the "Card?" error...

Guess that means no SPI?
by steve3000
Wed May 16, 2018 7:19 pm
Forum: hardware
Topic: SD cards which don't work with MMFS/SmartSPI/etc.
Replies: 13
Views: 339

Re: SD cards which don't work with MMFS/SmartSPI/etc.

DutchAcorn wrote:Did you use the SD card formatter to format them? Modern versions of windows are known to have issues with formatting SD cards?
Yep, that's what I used...

Not sure how to get more information off the card though, is there a tool to extract information?
by steve3000
Wed May 16, 2018 5:48 pm
Forum: hardware
Topic: SD cards which don't work with MMFS/SmartSPI/etc.
Replies: 13
Views: 339

Re: SD cards which don't work with MMFS/SmartSPI/etc.

Thanks duikkie, very useful summary.
duikkie wrote:which cards , brand and other marks ?
I only have what is in the photo, no brand or other marks.

So this would be SD only then, no SPI, that's a shame. :(

Hopefully not the start of a new trend in SD only cards...
by steve3000
Wed May 16, 2018 4:43 pm
Forum: hardware
Topic: SD cards which don't work with MMFS/SmartSPI/etc.
Replies: 13
Views: 339

SD cards which don't work with MMFS/SmartSPI/etc.

Is it normal to find that some SD cards don't work with any of the MMFS/SmartSPI/etc. ROMs using a 99p user port interface on the beeb? I recently got a couple of brand new, but very low capacity, SD cards (128mb) bundled with parts for another project. I was going to stick them in the back of my sp...
by steve3000
Sun May 13, 2018 9:00 pm
Forum: software: other
Topic: SN76489 best sample playback?
Replies: 44
Views: 1213

Re: SN76489 best sample playback?

My issue 3 beeb has a SN76489AN, however my issue 2 beeb has a SN76489N. I'm very surprised and confused by this info as everything I've read suggests that the SN76489 max clock is 500Khz, (whereas SN76489A is 4Mhz max) so unless the issue 2 MB has a /8 compensation for the 4Mhz sysem clock, it see...