Search found 3026 matches

by retroclinic
Mon May 07, 2018 10:55 pm
Forum: hardware
Topic: Case screws available anywhere?
Replies: 15
Views: 2144

Re: Case screws available anywhere?

Hi, yes I've got case screws, but the Beeb ones aren't identical, in that they're not black and have a standard screw head. They fit perfect though and are the same thread pitch! The Master ones I have are identical to the originals.

Thanks, Mark.
by retroclinic
Fri Dec 29, 2017 7:41 pm
Forum: hardware
Topic: Compatible DRAMS for BBC B
Replies: 14
Views: 1976

Re: Compatible DRAMS for BBC B

I've got DRAM in stock for all BBC Micro types, and others, including 4816 and 4164.

Thanks, Mark.
by retroclinic
Fri Dec 08, 2017 9:34 am
Forum: hardware
Topic: Problem Beeb MotherBoard
Replies: 68
Views: 2279

Re: Problem Beeb MotherBoard

I've read through the thread, but can't really follow where you are. You don't need a keyboard connected at all to get it to boot, just remove the System VIA - infact, to get an initial boot, remove both VIAs, 7002, Serial ULA, 6850 if socketed (worth removing it anyway if boot problems as they can ...
by retroclinic
Sun Sep 24, 2017 2:41 pm
Forum: past events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 139
Views: 10669

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

Hi.

Confirming I'll come on the Sunday, but I'll probably be with no kit - unless anyone wants anything in particular.

Thanks, Mark.
by retroclinic
Tue Aug 01, 2017 10:02 am
Forum: software: other
Topic: Datacentre Copy ADFS Disc to USB Question
Replies: 42
Views: 5468

Re: Datacentre Copy ADFS Disc to USB Question

Basic programs on JGHs site are usually just BBC Tokenised BASIC, so drag it to the USB Stick, rename it 7 characters with no file extension, then just LOAD it from drive 5 on the DataCentre in BASIC.

Thanks, Mark.
by retroclinic
Wed Jul 26, 2017 3:57 pm
Forum: software: other
Topic: Datacentre Copy ADFS Disc to USB Question
Replies: 42
Views: 5468

Re: Datacentre Copy ADFS Disc to USB Question

,,,,,,The USB "drive" in the DataCentre is only visible to *CAT, *EXPORT and *IMPORT, it doesn't work as a filing system Erm..yes it does, in part.... so you can't save/load to it. Yes you can. It supports the OS calls that allow SAVE and LOAD, both as BASIC and *SAVE *LOAD etc. The only thing it d...
by retroclinic
Wed Jun 28, 2017 4:33 pm
Forum: software: new games
Topic: A new conversion for the BBC Micro
Replies: 18
Views: 3201

Re: A new conversion for the BBC Micro

Looks good, I'll try it a bit later. This looks like Fervour on the Arc?
by retroclinic
Sun Mar 12, 2017 6:25 pm
Forum: wanted
Topic: Master 128 Power supplies
Replies: 0
Views: 415

Master 128 Power supplies

Hi Folks.

I'm looking for one or two (or 10!) Master 128 Power supplies, if anyone has any going spare? They don't need to work, or be recapped etc., just as they are will be fine, as long as they're not too rusty?

Let me know if you have any.

Thanks, Mark.
by retroclinic
Sun Mar 12, 2017 6:23 pm
Forum: wanted
Topic: bbc master case ideally damaged
Replies: 2
Views: 742

Re: bbc master case ideally damaged

Hi. Yes, I've got Master cases if you want them. Cosmetically challenged, but not damaged or with etched in security marks, just yellowed somewhat and some have painted or written on markings.

Thanks.
by retroclinic
Wed Mar 01, 2017 9:06 pm
Forum: hardware
Topic: Using OS 1.2 etc on a BBC Master ?
Replies: 33
Views: 6668

Re: Using OS 1.2 etc on a BBC Master ?

Any joy on the patched ADFS 1.32 for the Master - the one where the floppies work as well as the IDE in Model B mode?

Thanks.
by retroclinic
Wed Mar 23, 2016 4:05 pm
Forum: for sale / freebies
Topic: BBC Micro Male AUX Power connectors
Replies: 0
Views: 612

BBC Micro Male AUX Power connectors

Hi Folks.

I've now got stock of the male power connectors to fit the socket under the Beeb and Master. They are for sale singly on fleabay:

http://www.ebay.co.uk/itm/262348907853

Or if you want multiple quantities, I can do a better price.

Thanks, Mark.
by retroclinic
Wed Oct 14, 2015 6:40 pm
Forum: for sale / freebies
Topic: Model B+128K Boxed Immactulate
Replies: 2
Views: 1003

Model B+128K Boxed Immactulate

Hi Folks. I've just listed my one and only immaculate BBC Model B+128 boxed, fully working, refurbished, no yellowing or damage to the case. Caps replaced etc. Proper collectors one this with matching serial numbers on the box. Not cheap, but these don't come up that often. http://www.ebay.co.uk/itm...
by retroclinic
Wed Jul 01, 2015 4:20 pm
Forum: software: other
Topic: Using the beebs TMS5220 Speech chip without a ROM
Replies: 25
Views: 2664

Re: Using the beebs TMS5220 Speech chip without a ROM

Doesn't the Computer Concepts Speech ROM (not to be confused with the Superior software SPEECH! one) talk directly to the 5220? Does it need a 6100 in there as well?

Mark.
by retroclinic
Wed Jun 03, 2015 10:04 am
Forum: hardware
Topic: How to eject a Canon MDD221
Replies: 4
Views: 793

Re: How to eject a Canon MDD221

In the area highlighted is a solenoid, and on the actuator is a small rubber bush that is meant to smooth it's operation. This bush perishes over time. For those drives, I've just simply removed the solenoid completely as it just serves to load the heads onto the drive, something which later drives ...
by retroclinic
Thu May 14, 2015 9:06 am
Forum: hardware
Topic: bbc b psu problem
Replies: 8
Views: 903

Re: bbc b psu problem

There are two 100uF caps to replace if the -5v is out of spec. Don't have the diagram infront of me, but they're the only two of that value on the output side. Use low ESR for the least noise on the sound line. You can get them at Maplins, CPC, etc, or I've got them if you need to be sure of getting...
by retroclinic
Tue Apr 21, 2015 10:43 pm
Forum: software: other
Topic: US Beeb (UNB09) Welcome disk
Replies: 5
Views: 905

Re: US Beeb (UNB09) Welcome disk

It looks like an original, yes. Label certainly doesn't look like a repro, and is inline with the B+ Utility disk.
IMG_0480.JPG
Mark.
by retroclinic
Tue Apr 21, 2015 9:42 pm
Forum: software: other
Topic: US Beeb (UNB09) Welcome disk
Replies: 5
Views: 905

US Beeb (UNB09) Welcome disk

Hi Folks. I've come across a Welcome disk that is different, and I think it's the original one for the US Beebs. I say that because some of the programs seem to run in screen modes that only use 3/4 of the screen, as if they were NTSC modes? Also, the title screen says "Acorn Computer", similar to t...
by retroclinic
Wed Apr 08, 2015 7:16 pm
Forum: for sale / freebies
Topic: Worth Taking a Look At
Replies: 2612
Views: 215762

Re: Worth Taking a Look At

Some Masters that need some tlc http://m.ebay.co.uk/itm/361263031627 "some"? :lol: Definitely FUBAR, at least the first one! Same seller has the lot of 9 for £499, probably going to be similar condition inside if they've come from the same place, all rusted. Just a bit better cosmetically on the ou...
by retroclinic
Wed Apr 01, 2015 8:42 pm
Forum: off-topic
Topic: LOLPRICE
Replies: 2790
Views: 220871

Re: LOLPRICE

Alright, how much for this Amiga A1200 with internal CF card HDD and 68030 accelerator card? Dont tell me. I gave my A1200 with 50mhz 68050 and 32MB Ram (or something like that) in a tower case to a friend for free about 15 years ago. If I might out now it is worth loads I will cry. it's probably w...
by retroclinic
Sun Mar 29, 2015 11:03 am
Forum: hardware
Topic: Non-working BBC B+ 64K [fixed!]
Replies: 30
Views: 2976

Re: Non-working BBC B+ 64K

Tried replacing the System VIA? It controls both the keyboard and the sound, and a dead one gives those symptoms. Mark. Thanks for the suggestion Mark! The symptoms are indeed exactly the same when I remove the system VIA from my BBC B. I replaced the system VIA (IC20) using a known working 6522 fr...
by retroclinic
Sat Mar 28, 2015 10:52 am
Forum: hardware
Topic: Non-working BBC B+ 64K [fixed!]
Replies: 30
Views: 2976

Re: Non-working BBC B+ 64K

Tried replacing the System VIA? It controls both the keyboard and the sound, and a dead one gives those symptoms.

Mark.
by retroclinic
Sun Mar 01, 2015 10:29 pm
Forum: hardware
Topic: BBC Micro repair service needed - Essex
Replies: 16
Views: 1620

Re: BBC Micro repair service needed - Essex

Thanks for the +1 chaps.

Mark.
by retroclinic
Sun Mar 01, 2015 10:05 pm
Forum: hardware
Topic: Z80 co-pro, and datacentre?
Replies: 99
Views: 8736

Re: Z80 co-pro, and datacentre?

When I checksum the ROM image I saved from the physical chip that came with my DC, I get the same result as you: 9795. But when I checksum the RamFS ROM image that can be found on the CD-ROM that comes with the DC, I get EBC9. That's ok. The image on the CD doesn't include the extra 1K or so of emp...
by retroclinic
Sun Mar 01, 2015 9:54 pm
Forum: hardware
Topic: Z80 co-pro, and datacentre?
Replies: 99
Views: 8736

Re: Z80 co-pro, and datacentre?

Hi.

Only one official release version of RamFS, and that's 1.00! If anyone's done a patch, then they should have updated the version number.

Regards, Mark.
by retroclinic
Sat Feb 28, 2015 7:54 pm
Forum: hardware
Topic: Z80 co-pro, and datacentre?
Replies: 99
Views: 8736

Re: Z80 co-pro, and datacentre?

Hi Folks. Mine's identical except that its handwritten "Ver" is "E", which I presume stands for "External", which is what mine is. I just unscrewed the case to have a look at the board. Not necessarily related to this thread but I have found that an External Datacentre and ADFS 1.33 on a BBC Model B...
by retroclinic
Fri Jan 30, 2015 1:07 pm
Forum: hardware
Topic: Repair tip for old A305 A310 A440 etc floppy drive
Replies: 12
Views: 2097

Re: Repair tip for old A305 A310 A440 etc floppy drive

Looks good, fine with me!
by retroclinic
Fri Jan 16, 2015 7:44 pm
Forum: hardware
Topic: Beeb Astec PSU - Q4 identification?
Replies: 3
Views: 787

Re: Beeb Astec PSU - Q4 identification?

It's TO-92.

I'm pretty sure it's an LM431 or TL431, just need to find out which one, as there are different types for different voltages, and also programmable ones.

Mark.
by retroclinic
Fri Jan 16, 2015 6:51 pm
Forum: hardware
Topic: Beeb Astec PSU - Q4 identification?
Replies: 3
Views: 787

Beeb Astec PSU - Q4 identification?

Hi Folks. After having my first Beeb PSU that had seriously exploded itself, with 3 dead transistors, 4 open circuit resistors as well as blown caps, I'm just going through the schems of the Beeb PSU to try and get spares of most of the semis. I've got to Q4, and it's marked 431C, but doesn't appear...
by retroclinic
Sat Dec 06, 2014 2:02 pm
Forum: hardware
Topic: FPGA programmer
Replies: 16
Views: 2374

Re: FPGA programmer

I know you've tracked up your boards already, but you could also add this to the co-pro itself, with a USB/B socket on the board.

Mark.
by retroclinic
Fri Dec 05, 2014 3:52 pm
Forum: off-topic
Topic: LOL DESCRIPTION
Replies: 606
Views: 60852

Re: LOL DESCRIPTION

http://www.ebay.co.uk/itm/191428637729

Sure is R@RE in that state. :roll:

Lee, I don't think even you could bring this case up to anything else apart from landfill.

Mark.