Search found 3845 matches

by daveejhitchins
Fri Nov 30, 2012 8:37 pm
Forum: software
Topic: A420 disk drive won't read MS-DOS discs
Replies: 13
Views: 1363

Re: A420 disk drive won't read MS-DOS discs

I'd cover that EPROM window sooner rather than later if I were you. Even something as simple as insulation tape will sort that as a temporary thing. Certainly would . . . I've lost a few by not covering them, In fact I found one of my boards left on a windowsill - it was only there a few days but '...
by daveejhitchins
Fri Nov 30, 2012 8:26 pm
Forum: for sale / freebies
Topic: Needed To Repair BBC Memory?!!
Replies: 13
Views: 1032

Re: Needed To Repair BBC Memory?!!

Good idea tho dave! As an aside, if anyone has any ideas for 'SMALL' boards . . . I hate sending panels to be made without using every square mm of usable board. So, if you've an idea - let me know :D You can't tell from the images, above, but that little board is 4 layer with Rogers making up the ...
by daveejhitchins
Fri Nov 30, 2012 5:39 pm
Forum: for sale / freebies
Topic: Needed To Repair BBC Memory?!!
Replies: 13
Views: 1032

Needed To Repair BBC Memory?!!

Having a spare 5 min. and needing to 'fill-up' one of our PCB panels I created this: Inverter PCB.jpg This is an Inverter board that takes the 7404 series of ICs (s, LS, HC, HCT etc.). There's holes for +5V and 0V and Input and Output - all marked, even if the text is on the small side :D So, if any...
by daveejhitchins
Fri Nov 30, 2012 5:11 pm
Forum: introduce yourself
Topic: Hello there! Fairly new BBC user
Replies: 12
Views: 1610

Re: Hello there! Fairly new BBC user

Hi, hope you enjoy the forum . . .

Dave H :D
by daveejhitchins
Wed Nov 28, 2012 11:00 pm
Forum: introduce yourself
Topic: A new user with love for the Beeb!
Replies: 14
Views: 1277

Re: A new user with love for the Beeb!

Hi and welcome, you'll enjoy the forum, I'm sure :D

Dave H :D
by daveejhitchins
Wed Nov 28, 2012 10:44 pm
Forum: emulators
Topic: Bank switched ROM support
Replies: 1
Views: 499

Re: Bank switched ROM support

IanB wrote:I don't know if any other company used this technique


It was also used in the Electron Advanced Basic Editor. I've posted the ROM image in this post: HERE:
I still may find the original 'unprotected' code :?

Dave H :D
by daveejhitchins
Wed Nov 28, 2012 10:39 pm
Forum: hardware
Topic: Electron Second Processor project
Replies: 228
Views: 20959

Re: Electron Second Processor project

You could see a small discrepancy, between the channels, depending on the horizontal timebase setting e.g. if it's on 'chopped' or 'alternative' sweep. This can catch you out occasionally, especially when looking at very small differences! From the D61a user guide: 2012-11-28 10.28.02 pm.png Just a ...
by daveejhitchins
Wed Nov 28, 2012 10:20 pm
Forum: general
Topic: Today I received.....
Replies: 4431
Views: 274876

Re: Today I recieved.....

And today: I Found this: ACP Group2.jpg From Right to Left: John Huddleston, Rob Northern, John's sister (sorry I don't remember her name :( ) and Jane Huddleston. Me behind the camera :D And, of course, I don't remember which exhibition it was :lol: In the front - an Elk with one of our AP4's in pl...
by daveejhitchins
Tue Nov 27, 2012 9:35 pm
Forum: general
Topic: Today I received.....
Replies: 4431
Views: 274876

Re: Today I recieved.....

Today I received 3 items: 1) Electron User Port & Rom/Ram board PCB. =D> Thanks to MartinB for that . . . 2) A HUGE double disc drive (5.25" [40/80] and 3.5") from Mark at RetroClinic - I'd forgotton how big they actually were :lol: Anyway, a BIG thanks to Mark =D> 3) My external DataC...
by daveejhitchins
Tue Nov 27, 2012 9:25 pm
Forum: hardware
Topic: Electron User Port & Rom/Ram board
Replies: 536
Views: 58617

Re: Electron User Port & Rom/Ram board

Ha! Mine arrived too . . .

A BIG thanks Martin =D> =D> =D> =D> =D>

Dave H :D
by daveejhitchins
Sun Nov 25, 2012 8:05 pm
Forum: software: other
Topic: Help Needed with Tape Transfer
Replies: 22
Views: 1846

Re: Help Needed with Tape Transfer

Ah! The 'shed's' actually in the back of the garage, fully insulated with CH boiler to keep me warm :D Unfortunately Mrs H doesn't watch soaps, but she does have her own hobbies, thank goodness :D She has insisted, however, that I provide a communication link . . . I've already got my two bean cans ...
by daveejhitchins
Sat Nov 24, 2012 11:31 pm
Forum: software: other
Topic: Help Needed with Tape Transfer
Replies: 22
Views: 1846

Re: Help Needed with Tape Transfer

Hi all: I bought an RCA1802 Assembler on tape many years ago. I've only just got around to needing it :roll: Does anyone have the capability to transfer the tape to an image I can use from disc? I would be very grateful =D> I would, of course, repay any expenses incurred. If anyone else would be in...
by daveejhitchins
Fri Nov 23, 2012 9:39 pm
Forum: general
Topic: Today I received.....
Replies: 4431
Views: 274876

Re: Today I recieved.....

That Epson printer (which model is that?) takes me back - to 1986 at primary school, where we had an RX-80. It was slow, noisy and couldn't print in NLQ. Even my Centronics GLP could do NLQ (though even more slowly). It's an MX-80 which, I believe,pre-dates NLQ mode. I think I posted a ROM (maybe f...
by daveejhitchins
Fri Nov 23, 2012 8:13 am
Forum: hardware
Topic: Cumana Double disk drive
Replies: 20
Views: 1266

Re: Cumana Double disk drive

Dave H?? http://www.ebay.co.uk/itm/271108397082?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649 :lol: no, not me . . . I might bid, now I know it's there as all my drives are chassis only except for one 3.5" that was (is) used with my Elk. Unless you have some decent ones, Mark? Dave H ...
by daveejhitchins
Thu Nov 22, 2012 11:48 pm
Forum: hardware
Topic: Electron User Port & Rom/Ram board
Replies: 536
Views: 58617

Re: Electron User Port & Rom/Ram board

Martin:

Board ordered :D

And, remember everyone, if you need the 6522 I have plenty at £2.50 inclusive.
by daveejhitchins
Thu Nov 22, 2012 11:33 pm
Forum: hardware
Topic: Cumana Double disk drive
Replies: 20
Views: 1266

Re: Cumana Double disk drive

Well, I'll probably have something to fit, but not with a black front! But here's the killer . . . It'll be next week, at least before I can sort something out, that is, of course if you're interested. I may be able to get images for you early next week. Dave H :D P.s. Tip, put your camera setting t...
by daveejhitchins
Thu Nov 22, 2012 11:11 pm
Forum: hardware
Topic: Cumana Double disk drive
Replies: 20
Views: 1266

Re: Cumana Double disk drive

Lee, If you need a replacement drive I may be able to help. Have you some photos of your current set-up?

Dave H :D
by daveejhitchins
Thu Nov 22, 2012 8:12 am
Forum: hardware
Topic: Electron User Port & Rom/Ram board
Replies: 536
Views: 58617

Re: Electron User Port & Rom/Ram board

leenew wrote:That deserves a =D>
In fact it deserves =D> =D> =D> =D> =D> =D> =D> =D>


I agree, well done Martin . . . =D>

Dave H :D

p.s. So, when are the boards going out :D :D :D
by daveejhitchins
Wed Nov 21, 2012 10:06 pm
Forum: hardware
Topic: Modem
Replies: 12
Views: 1221

Re: Modem

Here's another one I found. Someone is already interested in it. I'll post the outcome later :D

Hi-Tec 1.jpg
Hi-Tec 1.jpg (213.79 KiB) Viewed 323 times
Hi-Tec 2.jpg
Hi-Tec 2.jpg (202.42 KiB) Viewed 323 times


Dave H :D
by daveejhitchins
Tue Nov 20, 2012 10:57 pm
Forum: hardware
Topic: Modem
Replies: 12
Views: 1221

Re: Modem

daveejhitchins wrote:Stuart (aerworuld) has managed to take a easier route and doesn't need the Nightingale Modem any more . . .

So, It's up for grabs for the cost of the postage. Let me know :D

Dave H :D


Sorry everyone - The Nightingale has flown. - Dave H :D
by daveejhitchins
Tue Nov 20, 2012 10:52 pm
Forum: hardware
Topic: Electron User Port & Rom/Ram board
Replies: 536
Views: 58617

Re: Electron User Port & Rom/Ram board

Care to measure yet again :wink: Martin: Didn't measure! Forgot to take a board with me, must stop rushing in the morning :D . However, I counted the connectors (0.1" spacing) and allowed 0.05" at each end. Which seemed reasonable at the time! I've now made a few measurements, as follows:...
by daveejhitchins
Mon Nov 19, 2012 8:12 am
Forum: hardware
Topic: Electron User Port & Rom/Ram board
Replies: 536
Views: 58617

Re: Electron User Port & Rom/Ram board

Hmmmm! I'll be checking my measurements today :lol:

Dave H:D

Edit: Made the measurements: 2.2" - Remember the boards were all Imperial in those days - Metric 55.88 - So you weren't far out with your 55.8 Martin! - DH :D
by daveejhitchins
Sun Nov 18, 2012 9:06 pm
Forum: software: other
Topic: Help Needed with Tape Transfer
Replies: 22
Views: 1846

Re: Help Needed with Tape Transfer

Update. . . OK, a little late :lol: Workshop nearing completion - wiring in and connected, walls in and painted, some shelves up (lots more to find and fit) floor painted, door on ( doesn't fit yet - had a bit of bent wood for the frame #-o ) All my 'kit' is safely stored ready for launch day . . . ...
by daveejhitchins
Sun Nov 18, 2012 2:49 pm
Forum: introduce yourself
Topic: Hello from a new member
Replies: 16
Views: 1383

Re: Hello from a new member

Hi, hope you enjoy the forum . . .

Dave H :D
by daveejhitchins
Tue Nov 13, 2012 12:21 pm
Forum: hardware
Topic: Electron Second Processor project
Replies: 228
Views: 20959

Re: Electron Second Processor project

No problem, let me know when that brick wall's getting close :?

Dave H :D
by daveejhitchins
Mon Nov 12, 2012 10:55 pm
Forum: hardware
Topic: BBC Rom Identification
Replies: 10
Views: 884

Re: BBC Rom Identification

Most of the ACP ROMs have routines to copy and save ROM images :D

Dave H :D
by daveejhitchins
Mon Nov 12, 2012 10:44 pm
Forum: hardware
Topic: Electron Second Processor project
Replies: 228
Views: 20959

Re: Electron Second Processor project

Would a Logic analyser be of use? I could loan you one for a short time (borrowed from work - small box, USB to PC). No trouble at all . . . :D Would need you to post lots and lots of results though :wink: Dave H :D Edit: You can find details of the device Here: It's quite easy to use and you can do...
by daveejhitchins
Mon Nov 12, 2012 10:38 pm
Forum: general
Topic: Today I received.....
Replies: 4431
Views: 274876

Re: Today I recieved.....

Arrived today via DHL :D
Rockwell 6522.jpg
Rockwell 6522.jpg (106.19 KiB) Viewed 795 times

If you need one or more of these look Here: For pricing.

Dave H :D

Edit: Oh! I forgot to add that in the same package were lots of GAL16V8's ready for the ABR and AQMR :D - Dave H :D
by daveejhitchins
Mon Nov 12, 2012 10:35 pm
Forum: hardware
Topic: Electron User Port & Rom/Ram board
Replies: 536
Views: 58617

Re: Electron User Port & Rom/Ram board

Further to an earlier post here. I now have the Rockwell R6522AP's. If anyone needs one, or more, of these, they are available at £2.50 including postage. I have plenty :D Rockwell 6522.jpg Dave H :D @Martin Would you be willing to test one out for me, please? If so pm me with address and I'll get o...
by daveejhitchins
Sun Nov 11, 2012 8:10 am
Forum: introduce yourself
Topic: Good evening
Replies: 11
Views: 1002

Re: Good evening

Welcome to the forum, beware, it's addictive :lol:

Dave H :D