Search found 4262 matches

by daveejhitchins
Sun Aug 19, 2018 7:31 am
Forum: software & utilities for the pc, mac or unix
Topic: BBCSDL - Functional Differences from Other BBC BASIC implementations?
Replies: 46
Views: 510

Re: BBCSDL - Functional Differences from Other BBC BASIC implementations ?

Actually it's time for me to retire from Stardot, not you. You have a perfectly legitimate reason to be here, but I don't. The forum is clearly stated as being "for users of Acorn computers and emulators" and I am neither. I have been a lurker for a long time, but my enforced departure from the BBC...
by daveejhitchins
Sat Aug 18, 2018 9:19 pm
Forum: hardware
Topic: Microcitec Cub 452 (Lack of) Display Issue
Replies: 8
Views: 180

Re: Microcitec Cub 452 (Lack of) Display Issue

dhoggan wrote:
Sat Aug 18, 2018 11:28 am
Thanks for the info and sounds like he might be a good place to start. Do you have an email address for him? I’m hoping he would be happy for me to ship it - assuming that he’d be interested.
Let me give him a ring on Monday . . . I'll report back here.

Dave H :D
by daveejhitchins
Sat Aug 18, 2018 8:57 pm
Forum: hardware
Topic: I2C 4 U
Replies: 201
Views: 13265

Re: I2C 4 U

There's always the One Wire technology as used by Dallas/Maxim . . .

Dave H :D
by daveejhitchins
Sat Aug 18, 2018 6:26 pm
Forum: general
Topic: celebrate with music!
Replies: 10
Views: 593

Re: celebrate with music!

aerworuld wrote:
Sat Aug 18, 2018 5:25 pm
happyB.zip
=D>

Dave H :D
by daveejhitchins
Sat Aug 18, 2018 9:10 am
Forum: hardware
Topic: I2C 4 U
Replies: 201
Views: 13265

Re: I2C 4 U

Martin . . . Not sure if you follow EEVBlog (?) but noticed this project : during a mailbag vid may be useful?

Dave H :D
by daveejhitchins
Sat Aug 18, 2018 6:57 am
Forum: hardware
Topic: Microcitec Cub 452 (Lack of) Display Issue
Replies: 8
Views: 180

Re: Microcitec Cub 452 (Lack of) Display Issue

I guess the question then is: repairable by someone of average competence (me!) or by a specialist? You need to find one of the remaining TV repair shops that's run by an old guy who has the experience of CRT sets (very rare these days!). I'm fortunate, here in Newton Aycliffe, as we have just such...
by daveejhitchins
Fri Aug 17, 2018 5:21 pm
Forum: introduce yourself
Topic: Hello from a novice veteran
Replies: 13
Views: 206

Re: Hello from a novice veteran

Welcome to the Forum, David . . . Enjoy . . .

Hope you've replaced the battery in your A3010?

Dave H :D
by daveejhitchins
Fri Aug 17, 2018 5:18 pm
Forum: hardware
Topic: BBC Micro B Repair Problems
Replies: 67
Views: 768

Re: BBC Micro B Repair Problems

lambdamikel wrote:
Fri Aug 17, 2018 5:01 pm
One more question - how difficult is it to get the speech chip and ROM? Are they being sold somewhere? If anybody has one to sell, please contact me.
Talk to Mark at RetroClinic - he has substitutes.

Dave H :D
by daveejhitchins
Fri Aug 17, 2018 5:12 pm
Forum: introduce yourself
Topic: Hello from the South Wales - Where beebs were made
Replies: 18
Views: 257

Re: Hello from the South Wales - Where beebs were made

Welcome the the Forum, Stuart . . . Enjoy . . . And more stories, please =D>

Dave H :D
by daveejhitchins
Thu Aug 16, 2018 6:49 am
Forum: software: classic games
Topic: Mega Games Cartridge for the Electron MGC
Replies: 455
Views: 43381

Re: Mega Games Cartridge for the Electron MGC

Dethmunk wrote:
Thu Aug 16, 2018 5:56 am
Hey there. Are there still MGC's left to buy? I'd be interested in one. :D
PM sent . . .

Dave H :D
by daveejhitchins
Wed Aug 15, 2018 7:13 pm
Forum: hardware
Topic: Converting ABR to EEPROM (28C256) for the Master
Replies: 19
Views: 490

Re: Converting ABR to EEPROM (28C256) for the Master

Could you repeat but load a different image into each slot so that the two slots aren’t the same. Include the second Elk confirmation before moving to a Master. Yup! Tried that - I've actually been trying different 'ideas' for the last two days - and repeating the same tests over and over. As time ...
by daveejhitchins
Wed Aug 15, 2018 6:50 pm
Forum: hardware
Topic: Converting ABR to EEPROM (28C256) for the Master
Replies: 19
Views: 490

Re: Converting ABR to EEPROM (28C256) for the Master

What makes you sure that both images have been loaded on the Elk in the first place? Your video shows the program asking to load the ABR and then showing slots 2 & 3 with the ABR utils but do you actually check off-video that each has the image physically loaded? I’m guessing that one of the two sl...
by daveejhitchins
Wed Aug 15, 2018 5:26 pm
Forum: hardware
Topic: Converting ABR to EEPROM (28C256) for the Master
Replies: 19
Views: 490

Re: Converting ABR to EEPROM (28C256) for the Master

More testing has revealed a possible faulty Master. Need to do some more testing tomorrow morning. For the first hour or so of use I'm getting some strange results (see images and attached videos). Then it starts to behave. So I've been fighting these faults and no faults trying to get an EEPROM bas...
by daveejhitchins
Tue Aug 14, 2018 9:12 pm
Forum: off-topic
Topic: Juice 5000mA Power bank - Aldi
Replies: 4
Views: 213

Re: Juice 5000mA Power bank - Aldi

Prime wrote:
Tue Aug 14, 2018 9:48 am
Did you mean Argos?
Brain typo . . . :lol:

Dave H :D
by daveejhitchins
Tue Aug 14, 2018 8:19 am
Forum: off-topic
Topic: Juice 5000mA Power bank - Aldi
Replies: 4
Views: 213

Juice 5000mA Power bank - Aldi

Just to let people know: Aldi have a special-buy of a Juice brand 5000mA power bank for sale, from last Sunday, for £12.95 - half the price they are in Argus . . .
IMG_2815.jpg
Dave H :D
by daveejhitchins
Tue Aug 14, 2018 6:38 am
Forum: hardware
Topic: Converting ABR to EEPROM (28C256) for the Master
Replies: 19
Views: 490

Re: Converting ABR to EEPROM (28C256) for the Master

MartinB wrote:
Mon Aug 13, 2018 8:36 pm
On your last ‘issue’, I shall await further info because I haven’t a clue what you’re on about.... :lol:
I feel a few videos are needed - just in case my imagination has gone astray . . . :shock:

Dave H :D
by daveejhitchins
Mon Aug 13, 2018 7:38 pm
Forum: hardware
Topic: Converting ABR to EEPROM (28C256) for the Master
Replies: 19
Views: 490

Re: Converting ABR to EEPROM (28C256) for the Master

Hi, Martin or is that the invisible man :wink: I've been using your EEPROM utilities a lot, over the last few days, during the testing of the ABR with a 28C256 fitted, not all the features but enough. The following are not criticisms but observations: If I follow your instructions to the letter - th...
by daveejhitchins
Mon Aug 13, 2018 7:28 am
Forum: hardware
Topic: A5000 hard drive and mouse not working :/
Replies: 12
Views: 239

Re: A5000 hard drive and mouse not working :/

You've a problem with IC58 (leg missing or not soldered) and IC55 that still has blue corrosion on the socket pins. You need to treat the whole area with white vinegar, using a small brush (an old toothbrush works well!). Remove any socketed components first . . . Leave the vinegar on for about 10mi...
by daveejhitchins
Sun Aug 12, 2018 9:26 pm
Forum: hardware
Topic: Converting ABR and ATI for EEPROM (28C256)
Replies: 56
Views: 3530

Re: Converting ABR and ATI for EEPROM (28C256)

Elminster wrote:
Sun Aug 12, 2018 9:22 pm
I most have something that programs PAL somewhere, is there a link to the instructions on programming it or just the code?
I'll add the JED file for a GAL16V8

Dave H :D
by daveejhitchins
Sun Aug 12, 2018 8:13 pm
Forum: hardware
Topic: Converting ABR and ATI for EEPROM (28C256)
Replies: 56
Views: 3530

Re: Converting ABR and ATI for EEPROM (28C256)

I've now fixed the PLD so this mod will now work for an ABR fitted into a Master.

Note: The PLD will need to be updated first, see this post for details. If you don't have programming facilities for PLDs, either return the PLD or ABR to me and I'll reprogram it for you.

Dave H :D
by daveejhitchins
Sun Aug 12, 2018 6:03 pm
Forum: introduce yourself
Topic: Hello from Palo Alto
Replies: 13
Views: 284

Re: Hello from Palo Alto

Welcome to the Forum, lambdamikel . . . Enjoy . . .

Dave H :D
by daveejhitchins
Sun Aug 12, 2018 6:01 pm
Forum: hardware
Topic: Converting ABR to EEPROM (28C256) for the Master
Replies: 19
Views: 490

Re: Converting ABR to EEPROM (28C256) for the Master

Sounds like the exact process needed for my B modules... including persuading Martin to add support [-o< That would be similar to my AP7 ap7a.jpg ap7b.jpg An ABR for an IC socket - Shown here in an Electron AP6 but you could change the links and it was supplied with leads to fit into a Beeb. A bit ...
by daveejhitchins
Sun Aug 12, 2018 5:27 pm
Forum: hardware
Topic: Converting ABR to EEPROM (28C256) for the Master
Replies: 19
Views: 490

Re: Converting ABR to EEPROM (28C256) for the Master

For completeness, here are the Electron nCS, nOE and R/nW signals for a write and read cycle: abr_elk1.jpg abr_elk2.jpg abr_elk3.jpg And here is the PLD code: Name ABR-Issue3 ; PartNo 16L8 ; Date 12/08/2018 ; Revision 03 ; Designer D.E.J. Hitchins ; Company Retro Hardware ; Assembly Advanced Battery...
by daveejhitchins
Sun Aug 12, 2018 5:17 pm
Forum: hardware
Topic: Converting ABR to EEPROM (28C256) for the Master
Replies: 19
Views: 490

Re: Converting ABR to EEPROM (28C256) for the Master

Having the software controlled LOCK and UNLOCK means you don't need a physical write-protect switch - bonus :mrgreen: Does this chip return inverse/toggling bytes for a short while after an attempted write even if locked like the Greenliant chips do? That's a problem I had with the chips I used & D...
by daveejhitchins
Sun Aug 12, 2018 1:41 pm
Forum: hardware
Topic: Converting ABR to EEPROM (28C256) for the Master
Replies: 19
Views: 490

Re: Converting ABR to EEPROM (28C256) for the Master

Update . . . Instigated the nCS controlled write sequence which seems to have fixed the problem. As in the first post: Top trace down = T2, nCS, Noe and R/nW abr21.jpg abr22.jpg abr23.jpg Testing on the Master, with MartinB's utilities, has gone well. The only thing you have to remember is to use th...
by daveejhitchins
Sat Aug 11, 2018 3:36 pm
Forum: hardware
Topic: Converting ABR to EEPROM (28C256) for the Master
Replies: 19
Views: 490

Re: Converting ABR to EEPROM (28C256) for the Master

I’m on hols Dave as you know but quickly, I didn’t ever get my eeprom stuff working in a Master internal socket but everything was fine in a cartridge. That’s probably no help whatsoever but just thought I’d mention it...😜 Thanks, Martin . . . I think Steve must have, as I'm sure one or more of his...
by daveejhitchins
Sat Aug 11, 2018 2:07 pm
Forum: off-topic
Topic: Flooring the loft
Replies: 8
Views: 242

Re: Flooring the loft

When I converted my garage to workshop I used the standard loft boarding for the loft floor, Workshop ceiling and walls - with insulation between. I've not any problems with the loft flooring - lots of 'stuff' stored on it 8)

Dave H :D
by daveejhitchins
Sat Aug 11, 2018 1:48 pm
Forum: hardware
Topic: Converting ABR to EEPROM (28C256) for the Master
Replies: 19
Views: 490

Converting ABR to EEPROM (28C256) for the Master

This thread was for the Electron - which turned out to be easy e.g. just removing the battery and replacing the SRAM with the 28C256 Flash/EEPROM worked. The ABR for the Master seems to be causing me problems :? First I tried exactly what I did for the Electron - Master wouldn't even start-up. Hmmm...
by daveejhitchins
Sat Aug 11, 2018 9:51 am
Forum: hardware
Topic: MDFS Key Losted
Replies: 5
Views: 181

Re: MDFS Key Losted

philb wrote:
Sat Aug 11, 2018 8:41 am
Awesome, thanks. No rush, I'll be on holiday in darkest Yorkshire for the next couple of weeks anyway.
Darn . . . No Christmas card for you then [-X

Dave H :lol:
by daveejhitchins
Sat Aug 11, 2018 7:59 am
Forum: introduce yourself
Topic: Hi from a former Atom owner
Replies: 9
Views: 147

Re: Hi from a former Atom owner

Welcome to the Forum, Tris . . . Enjoy . . .

Dave H :D