Search found 4571 matches

by daveejhitchins
Sat Dec 29, 2018 7:36 am
Forum: off-topic
Topic: What is the average age on here??
Replies: 246
Views: 23663

Re: What is the average age on here??

Talywain wrote:
Fri Dec 28, 2018 7:57 pm
I also remember a lecture where we were told that there would never be IC’s with more than 40 pins as you would never be able to test them!
Sooooo dangerous - The old adage: Never say Never!

Dave H :D
by daveejhitchins
Sat Dec 29, 2018 7:32 am
Forum: hardware
Topic: BeebSID
Replies: 971
Views: 96367

Re: BeebSID

I can confirm it _can_ be done. I've finally done something with my AP5! =D> Here you go: https://youtu.be/CclLIeZl9pgA Absolutely brilliant =D> =D> If there's a genuine amount of interest I can spend a few hours making a nicer player/menu. If not I can bundle up my stuff and stick it on GitHub for...
by daveejhitchins
Fri Dec 28, 2018 6:46 am
Forum: introduce yourself
Topic: Hello from Cheltenham
Replies: 8
Views: 223

Re: Hello from Cheltenham

Welcome to the Forum, Joka80 . . . Enjoy . . .

Dave H :D
by daveejhitchins
Fri Dec 28, 2018 6:45 am
Forum: introduce yourself
Topic: Hello from Atlanta, GA
Replies: 8
Views: 176

Re: Hello from Atlanta, GA

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

Dave H :D
by daveejhitchins
Mon Dec 24, 2018 9:10 am
Forum: hardware
Topic: New Design For Electron Disc Interface AP3/4/Peg - Now Progressing (23-12-2018)
Replies: 21
Views: 1553

Re: New Design For Electron Disc Interface AP3/4/Peg - Now Progressing (23-12-2018)

Magnitude comparators are good for address decoding where you only want a limited address range with 1 or 2 output enables. The beauty of using a comparator, is you can define the state of the address lines you want compared. For example: 74x85 .... 4-bit magnitude comparator ........... 16 pin, 74...
by daveejhitchins
Sun Dec 23, 2018 6:14 pm
Forum: introduce yourself
Topic: Hello from South Wales
Replies: 10
Views: 222

Re: Hello from South Wales

Welcome to the Forum, Talywain . . . Enjoy . . .

You must have some interesting stories from your school computer engineer days?

Dave H :D
by daveejhitchins
Sun Dec 23, 2018 5:17 pm
Forum: introduce yourself
Topic: Hello from Poland
Replies: 6
Views: 129

Re: Hello form Poland

Welcome the the Forum, Roman . . . Enjoy . . .
nekroskop wrote:
Sun Dec 23, 2018 4:21 pm

I have got a BBC Micro B issue 7. I fixed PSU, made a RGB cable and connected gotek to my BBC.
It's works perfectly.
=D>

Dave H :D
by daveejhitchins
Sun Dec 23, 2018 3:59 pm
Forum: hardware
Topic: New Design For Electron Disc Interface AP3/4/Peg - Now Progressing (23-12-2018)
Replies: 21
Views: 1553

Re: New Design For Electron Disc Interface AP3/4/Peg - Now Progressing (23-12-2018)

Well, nearly 8 years later (!!??), I've started to make some progress :wink: The Idea: 1) A switchable (link selectable) choice of E00 DFS - ACP's or Slogger's 2) ADFS E00, using the same RAM chip as DFS ** 3) All memory decoding within a 22V10 PLD, to save space 4) Space saving 28pin 0.3" 6264 SRAM...
by daveejhitchins
Sun Dec 23, 2018 6:46 am
Forum: introduce yourself
Topic: Hi from New Zealand
Replies: 11
Views: 233

Re: Hi from New Zealand

Welcome to the Forum, acsi . . . Enjoy . . . Love to help with your hard drive issue, unfortunately I've not seen one of the Solidisk interfaces. We do have a option for a solid-state hard drive, though. We can add a BeebSCSI to the 1MHz port on the AP5. This gives you an unimaginable amount of stor...
by daveejhitchins
Sat Dec 22, 2018 11:10 pm
Forum: hardware
Topic: P.R.E.S. AP5 - Original and Re-Design
Replies: 289
Views: 24021

Re: P.R.E.S. AP5 - Original and Re-Design

All of the first batch of AP5 now gone. And I'm already getting requests, from eBay, for more. So, second batch being considered.

One problem . . . Not enough cases for a second batch - may have to consider a 3D printed case! Thoughts?

Dave H :D
by daveejhitchins
Sat Dec 22, 2018 7:30 am
Forum: introduce yourself
Topic: Hello you
Replies: 7
Views: 182

Re: Hello you

Welcome back to the Forum, Gigerpunk . . . Enjoy . . .

Dave H :D
by daveejhitchins
Thu Dec 20, 2018 9:01 pm
Forum: hardware
Topic: Strange Pegasus DFS fault
Replies: 39
Views: 847

Re: Strange Pegasus DFS fault

jms2 wrote:
Thu Dec 20, 2018 7:58 am
As I've got Dave's paypal info and he's got my address, I'll go down that route. But thanks for the offer Colin.
Posted it this morning, John . . .

Dave H :D
by daveejhitchins
Wed Dec 19, 2018 7:50 pm
Forum: hardware
Topic: Strange Pegasus DFS fault
Replies: 39
Views: 847

Re: Strange Pegasus DFS fault

jms2 wrote:
Wed Dec 19, 2018 3:47 pm
Anyone got a 6264 for sale?
I have a few 6264s, however, 62256s work just as well! PM me if you'd still like one.

Dave H :D
by daveejhitchins
Sat Dec 15, 2018 11:00 pm
Forum: hardware
Topic: Electron keyboard strangeness
Replies: 3
Views: 151

Re: Electron keyboard strangeness

CMcDougall wrote:
Sat Dec 15, 2018 10:58 pm
Naa, just un plug /insert cable ribbon 20x , gets rid of old contamination, sorted 8)
And maybe use some switch cleaner on the pins!

Dave H :D
by daveejhitchins
Fri Dec 14, 2018 7:35 am
Forum: hardware
Topic: White stuff on pin connectors and jumpers
Replies: 12
Views: 361

Re: White stuff on pin connectors and jumpers

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 daveejhitchins
Wed Dec 12, 2018 3:40 pm
Forum: off-topic
Topic: LOLPRICE
Replies: 2842
Views: 240534

Re: LOLPRICE

Well Goodness Me . . . It MUST be Christmas :shock:
ElkPlus1&3.png
Edit: I wonder what a tested and working one would fetch?

Dave H :?
by daveejhitchins
Tue Dec 11, 2018 8:29 am
Forum: hardware
Topic: Strange Pegasus DFS fault
Replies: 39
Views: 847

Re: Strange Pegasus DFS fault

John . . . PM sent.

Dave H :D
by daveejhitchins
Sat Dec 08, 2018 1:15 pm
Forum: hardware
Topic: Strange Pegasus DFS fault
Replies: 39
Views: 847

Re: Strange Pegasus DFS fault

It's interesting, and possibly a clue, that these problems only started after I unplugged the board from the Plus 1 (and took out the DFS rom). Prior to that, it had been intact and in-situ for quite a while. This must have disturbed something I imagine. That's a similar problem to the one I've jus...
by daveejhitchins
Sat Dec 08, 2018 7:56 am
Forum: hardware
Topic: Loss of output on Electron RGB Port
Replies: 24
Views: 492

Re: Loss of output on Electron RGB Port

GREAT NEWS! I found a weird voltage drop in my C-sync signal coming out of chip 14 so I replaced that and now the old Elk works again! I think replacing IC 19 was also a necessary step as suggested above. So I just want to thank everyone here who read the thread and an extra special thanks to every...
by daveejhitchins
Sat Dec 08, 2018 7:53 am
Forum: hardware
Topic: Strange Pegasus DFS fault
Replies: 39
Views: 847

Re: Strange Pegasus DFS fault

Just to throw a spanner in the works, at this point: I've been building the rest of the Pegasus PCB stock. Plus I have some later issue PCBs that look as if they were production or development repairs - the thing that stands out with both sets of PCBs, not counting the layout and shorts for the one ...
by daveejhitchins
Fri Dec 07, 2018 5:18 pm
Forum: general
Topic: Today I received.....
Replies: 4958
Views: 355779

Re: Today I received.....

Chris . . . If you want to lose a pack or two (?) I use them! I could collect at ABUG. Let me know if, and what price.

Dave H :D
by daveejhitchins
Fri Dec 07, 2018 5:15 pm
Forum: hardware
Topic: Strange Pegasus DFS fault
Replies: 39
Views: 847

Re: Strange Pegasus DFS fault

If anyone needs a printed copy of the Slogger DFS User Guide for the Pegasus Interface (?) I now have them. Reformatted from the download that kicking around.

I also have the SEDFS ROM and can supply copies with a genuine Slogger label or just the lebel, if required.

Dave H :D
by daveejhitchins
Fri Dec 07, 2018 5:09 pm
Forum: hardware
Topic: VL2304PS-QC - ANNA
Replies: 24
Views: 807

Re: VL2304PS-QC - ANNA

Thanks to PaulV (thank's Paul) I now have the PLD for the original Anna MEMC - and it wasn't locked :D

Here the .jed file. If someone has the time to convert this to a .pld file??
MEMC ANNA PLD.jed.zip
(580 Bytes) Downloaded 12 times

Dave H :D
by daveejhitchins
Fri Dec 07, 2018 5:00 pm
Forum: hardware
Topic: Restoration of Three Cumana Electron Disc Interfaces
Replies: 10
Views: 676

Re: Restoration of Three Cumana Electron Disc Interfaces

Looks like I have this working now, after 2 more links! - Including with the Slogger SEDFS.

IMG_3052.jpg
IMG_3051.jpg
IMG_3050.jpg

Dave H :D
by daveejhitchins
Fri Dec 07, 2018 9:10 am
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 18 to 20 January 2019 (Hampshire) BOOKING THREAD
Replies: 97
Views: 3768

Re: ABUG SOUTH 18 to 20 January 2019 (Hampshire) BOOKING THREAD

My neighbour ( :shock: ) has persuaded me that I need to attend this meeting - she says I don't have enough time left in life to waste :lol: So if you could book me in, please. Hotel already booked. I'll be there Friday afternoon and I'll be leaving on the Sunday afternoon. Dave H :D Edit: I'm looki...
by daveejhitchins
Thu Dec 06, 2018 5:38 pm
Forum: introduce yourself
Topic: Greeting
Replies: 12
Views: 590

Re: Greeting

Welcome to the Forum, Symo . . . Enjoy . . . and keep up the conversions =D>

Dave H :D
by daveejhitchins
Thu Dec 06, 2018 4:52 pm
Forum: hardware
Topic: Restoration of Three Cumana Electron Disc Interfaces
Replies: 10
Views: 676

Re: Restoration of Three Cumana Electron Disc Interfaces

Well . . . Yes and no :? I have the board to the point where I can get the Cumana ROM text up on the start screen. And I've also had the interface access both drives 1 & 2. But every time I've plugged it in - removed it- plugged it in again it fails. So far I've four links and probably have more! Bu...
by daveejhitchins
Tue Dec 04, 2018 7:51 am
Forum: software: other
Topic: FORMAT Issue on the Electron
Replies: 32
Views: 682

Re: FORMAT Issue on the Electron

Prime wrote:
Tue Dec 04, 2018 7:33 am
What was the reason for switching from LS->HCT? I have a tube of LS245s as the Atom Colour needs them, so may tray them in the AP6, as I still have the top off the Plus 1.
Availability, at the right price . . . at the time I needed them.

Dave H :D
by daveejhitchins
Tue Dec 04, 2018 7:10 am
Forum: software: other
Topic: FORMAT Issue on the Electron
Replies: 32
Views: 682

Re: FORMAT Issue on the Electron

Success! - The Pegasus rom does something naughty which results in "Bad command". - The AMX Support rom does something else naughty which results "Bad name". There is no hardware fault, only firmware. If I *UNPLUG both roms, everything is OK. And... with 32k RAM in the AP6, may reported memory is c...