Search found 152 matches

by stevendt
Thu Jan 23, 2014 9:58 pm
Forum: for sale / freebies
Topic: 5.25" SS Floppy Drive for BBC - free to good home
Replies: 2
Views: 554

Re: 5.25" SS Floppy Drive for BBC - free to good home

SOLD ! :-)

OK, will let you know about the package tomorrow,

regards
Dave
by stevendt
Wed Jan 22, 2014 4:36 pm
Forum: for sale / freebies
Topic: 5.25" SS Floppy Drive for BBC - free to good home
Replies: 2
Views: 554

5.25" SS Floppy Drive for BBC - free to good home

Hi, I don't know whether anyone will be interested, but . . . . . I have a Mitsumi D501 5.25" FDD that needs a new home. I was given it when I was trying to get replacement drives for my Memotech FDX, but being single sided, I never actually tried it, but as far as I know, it works. It is a bare dri...
by stevendt
Tue Oct 29, 2013 11:33 am
Forum: off-topic
Topic: LOLPRICE
Replies: 2996
Views: 333633

Re: LOLPRICE

I know it's not a Beeb, but here is a great opportunity to pick up a "Very rare vintage Memotech ZX81 + keyboard + 2 Memopaks 32k + buffer" http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=261316897239&ssPageName=ADME:B:SS:GB:3160#ht_46wt_1399 Note that it's particularly rare as it is in BLACK !...
by stevendt
Thu Oct 17, 2013 1:37 pm
Forum: 8-bit acorn hardware
Topic: LCD TVs and monitors for use with BBCs
Replies: 193
Views: 78774

Re: LCD TVs and monitors for use with BBCs

Hi Mark, difficult to tell, I can't toggle the primary colours directly at the moment, but changing the screen colour does change the shade of grey. I'll knock up a test program to control the colours and test each in turn - from what I've seen, I expect that they will all produce a different shade ...
by stevendt
Thu Oct 17, 2013 11:56 am
Forum: 8-bit acorn hardware
Topic: LCD TVs and monitors for use with BBCs
Replies: 193
Views: 78774

Re: LCD TVs and monitors for use with BBCs

danielj wrote:Try the pots first, then check that you've got the connector wired properly :)

d.
surely check that you've got the connector wired properly first, then try the pots?

:-)
by stevendt
Thu Oct 17, 2013 10:52 am
Forum: 8-bit acorn hardware
Topic: LCD TVs and monitors for use with BBCs
Replies: 193
Views: 78774

Re: LCD TVs and monitors for use with BBCs

Greyscale displayed on VGA monitor Although not to a BBC, I am taking an RGB signal through a HD9800/GBS8200 to a VGA monitor. On one system (using a CGA like TTL RGB signal), it works fine on another, using ~15Khz analogue RGB, I just get greyscale on the VGA monitor. Am I right in thinking that if...
by stevendt
Sat Sep 14, 2013 12:44 am
Forum: off-topic
Topic: Calling all Power Supply Experts :-)
Replies: 6
Views: 1087

Re: Calling all Power Supply Experts :-)

Mark,

yes, I had the same when my FDX popped a cap, complete with smoke and smell

- in the dining room !
by stevendt
Thu Sep 12, 2013 11:32 pm
Forum: off-topic
Topic: Calling all Power Supply Experts :-)
Replies: 6
Views: 1087

Re: Calling all Power Supply Experts :-)

Nice Video . . .

Well, at least you're confident, I'd have turned the power off way before the "pop" !

You did jump though :-)

regards
Dave
by stevendt
Tue Sep 10, 2013 2:54 pm
Forum: for sale / freebies
Topic: The computer course magazine. 1984. 9 volumes.
Replies: 7
Views: 1393

Re: The computer course magazine. 1984. 9 volumes.

These part-works have already been scanned. If anyone else is interested in them, just in case you were not aware, they are available in the World of Spectrum Archive ftp://worldofspectrum.org/pub/spectrum/magazines/TheHomeComputerCourse/ ftp://worldofspectrum.org/pub/spectrum/magazines/TheHomeCompu...
by stevendt
Tue Sep 10, 2013 2:38 pm
Forum: off-topic
Topic: Calling all Power Supply Experts :-)
Replies: 6
Views: 1087

Calling all Power Supply Experts :-)

Hi I posted a message a while ago (below) asking for suggested replacements for a vintage PSU, I have one that I think will work, but I would like to get the original fixed if at all possible. I have not been able to get anywhere with it, and as far as I can see from searching the web, there does no...
by stevendt
Tue Jul 23, 2013 10:12 pm
Forum: general
Topic: RGB SCreen Capture - how to?
Replies: 14
Views: 1632

Re: RGB SCreen Capture - how to?

Hi Mark,

thanks for the info - I like that idea of cutting a VGA lead in half - then I can make a lead for my FDX (the primary purpose) and one for my Beeb as well.

I have 220R resistors, just need to pick up some heatshrink, 9 way D (for the FDX) and 6-pin din (for the BBC),

regards
Dave
by stevendt
Tue Jul 23, 2013 8:45 pm
Forum: general
Topic: RGB SCreen Capture - how to?
Replies: 14
Views: 1632

Re: RGB SCreen Capture - how to?

Well, I'm hoping it works, as I've just bought the one on ebay :-)

Mark & Mark, I've had a look through the thread mentioned above. It looks like I might need resistors in the cable to convert TTL RGB to 0-1V, is that right?

regards
Dave
by stevendt
Mon Jul 22, 2013 8:15 pm
Forum: off-topic
Topic: AC-DC PSU Suggestions?
Replies: 0
Views: 487

AC-DC PSU Suggestions?

Hi, I have just picked up some very old Memotech Videowall hardware. Unfortunately, the PSU in the main "box" (the digital frame store controller) is dead - the internal fuse is OK but there are no DC outputs. The PSU (Astec SA130-3400) is obsolete and I can't find one available on the web. One poss...
by stevendt
Fri Jul 19, 2013 12:33 am
Forum: general
Topic: RGB SCreen Capture - how to?
Replies: 14
Views: 1632

Re: RGB SCreen Capture - how to?

Thanks Mark,

I'll read through the threads in more detail tomorrow,

regards
Dave
by stevendt
Thu Jul 18, 2013 11:46 pm
Forum: general
Topic: RGB SCreen Capture - how to?
Replies: 14
Views: 1632

Re: RGB SCreen Capture - how to?

Hi Mark,

that's interesting - and different to what the manual says. How do you connect TTL RGB to the DVS-204?

regards
Dave
by stevendt
Thu Jul 18, 2013 12:05 pm
Forum: general
Topic: RGB SCreen Capture - how to?
Replies: 14
Views: 1632

Re: RGB SCreen Capture - how to?

Hi Mark,

The DVS-204 seems to be able to scale composite, component and S-video signals, but only pass through (not scale) RGsB or RGBS?

Regards
Dave
by stevendt
Wed Jul 17, 2013 1:01 am
Forum: general
Topic: RGB SCreen Capture - how to?
Replies: 14
Views: 1632

Re: RGB SCreen Capture - how to?

Hi Mark,

Thanks a lot for the suggestion, I'll see how the auction goes, it looks like a neat widget. We're you using them to capture VGA, or TTL RGB/CGA?

Paul, I have a one of those "GBS thinges", but don't think it would give me the quality that I want.

Regards
Dave
by stevendt
Tue Jul 16, 2013 9:25 am
Forum: general
Topic: RGB SCreen Capture - how to?
Replies: 14
Views: 1632

Re: RGB SCreen Capture - how to?

Hi there BeebMaster, thanks a lot for the reply - yes, you are on the right lines, what I want to do is to capture single frames. I was hoping to find some sort of USB (ideally) or PCI card (acceptable) that would allow me to take snapshots/single frames directly on a PC. I had not thought about usi...
by stevendt
Sun Jul 14, 2013 6:19 pm
Forum: general
Topic: RGB SCreen Capture - how to?
Replies: 14
Views: 1632

RGB SCreen Capture - how to?

Has anybody got a screen capture solution for RGB video output, i.e., CGA like, such as from the BBC etc.?

I'm not talking about capturing after conversion to VGA, I am looking for something that could capture screen output direct from the computer?

regards
Dave
by stevendt
Sun May 12, 2013 6:11 pm
Forum: wanted
Topic: Wanted, Broken Memotech MTX Computer
Replies: 2
Views: 550

Re: Wanted, Broken Memotech MTX Computer

Hi Jon, thanks for the reply, you can see a picture of the markings about half way down this page http://www.primrosebank.net/computers/mtx/mtxcollection.htm It is on S/N 18997. Click on the image to see a full size (large!) photo. I don't want to use any "chemical strippers" that might damage the M...
by stevendt
Sun May 12, 2013 2:14 pm
Forum: wanted
Topic: Wanted, Broken Memotech MTX Computer
Replies: 2
Views: 550

Wanted, Broken Memotech MTX Computer

Hi, Bit of a long shot, but anyway ....... I'm looking for a broken Memotech MTX computer, in any state of (dis)repair, just a reasonably presentable keyboard, the keyboard does not need to work, nor does the computer itself. I have a working MTX that came from a college a few years ago. The keyboar...
by stevendt
Thu Apr 25, 2013 11:16 pm
Forum: 8-bit acorn hardware
Topic: EPROM Programers in use / recommended?
Replies: 9
Views: 1313

Re: EPROM Programers in use / recommended?

Hi Phil, I think I followed most of that :-) I have a cheap programmer (TOP853) that can read 27256s, so this could be an option, thanks a lot - off to look for some software that might be able to do the conversion, regards Davebbbbbbbb Has anyone gt a recommendation for a (cheap) "programmer" that ...
by stevendt
Thu Apr 25, 2013 11:44 am
Forum: 8-bit acorn hardware
Topic: EPROM Programers in use / recommended?
Replies: 9
Views: 1313

Re: EPROM Programers in use / recommended?

Has anyone gt a recommendation for a (cheap) "programmer" that can read ancient PALs (assuming that the security fuse is intact), particularly, a 14L4? The ability to blow a new one (or GAL) would be nice, but not essential, the important thing is being able to read the fuse map / logic. Any suggest...
by stevendt
Wed Apr 17, 2013 3:06 pm
Forum: wanted
Topic: WTB: Memotech MTX500 PSU
Replies: 5
Views: 957

Re: WTB: Memotech MTX500 PSU

Sorry to disappoint you, but without the computer, the PSUs are as rare as the proverbial rocking horse s**t! The PSU seemed pretty prone to failure, your best hope at the moment would be to "roll your own", the PSU is in fact just a multi-tapped transformer 22.5, 18V and 9VA (all AC). 1024MAK has c...
by stevendt
Wed Mar 20, 2013 10:05 pm
Forum: 8-bit acorn hardware
Topic: NEC FD-1057 Drive Jumper Settings
Replies: 19
Views: 3086

Re: NEC FD-1057 Drive Jumper Settings

Hi, that's an interesting point. Maybe I am on completely the wrong track - no pun intended :-) As you say, I have seen quite a few Beeb 40/80T drives that have a switch to change between the number of tracks. It's been such a long time since I worked with 5.25" floppies on a PC, but when the 1.2MB ...
by stevendt
Wed Mar 20, 2013 12:45 am
Forum: 8-bit acorn hardware
Topic: NEC FD-1057 Drive Jumper Settings
Replies: 19
Views: 3086

Re: NEC FD-1057 Drive Jumper Settings

Hi Mark,

thanks for the tip, looking at the photo I took, I can't see any traces, but I guess they could be on the underside of the board too.

I will take the PCB off and have a look tomorrow,

regards
Dave
by stevendt
Tue Mar 19, 2013 10:10 pm
Forum: 8-bit acorn hardware
Topic: NEC FD-1057 Drive Jumper Settings
Replies: 19
Views: 3086

Re: NEC FD-1057 Drive Jumper Settings

Hi again, the drive does not have any more jumpers than those shown in the photo. It looks very much like the drive is fixed at 1.2MD - the DEN and HDE solder pads marked on the board are where I'd guess the jumpers should go. Without knowing whether the drive firmware supports those jumpers, there'...
by stevendt
Mon Mar 18, 2013 1:35 am
Forum: 8-bit acorn hardware
Topic: NEC FD-1057 Drive Jumper Settings
Replies: 19
Views: 3086

Re: NEC FD-1057 Drive Jumper Settings

Hi again, thanks for the warning, I had already discovered that though :D In fact, it is why I had removed the light metal plate which covered the circuit board (and carriage, heads etc.). The drive is "as new", it has hardly had any use, when I got it, it still had the original cardboard head prote...
by stevendt
Sat Mar 16, 2013 11:40 pm
Forum: 8-bit acorn hardware
Topic: NEC FD-1057 Drive Jumper Settings
Replies: 19
Views: 3086

Re: NEC FD-1057 Drive Jumper Settings

Hi,

thanks a lot for the reply - I don't **think** that there are more jumpers to the right, but I will check tomorrow - in bed now :-)

I could not get your Google link to work? It looks like an interesting page if I could get to it

regards
Dave
by stevendt
Sat Mar 16, 2013 9:29 pm
Forum: 8-bit acorn hardware
Topic: NEC FD-1057 Drive Jumper Settings
Replies: 19
Views: 3086

Re: NEC FD-1057 Drive Jumper Settings

Hi,

tomorrow's plan is to try it on a PC.

I am not very confident that I can change it to 40T though, there are pads where it looks like jumpers would be fitted under a metal cover over the pcb as shown in this photo

regards
Dave
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