Search found 1672 matches

by DutchAcorn
Tue Feb 20, 2018 5:07 pm
Forum: hardware
Topic: Backup from old SCSI HDD
Replies: 7
Views: 211

Re: Backup from old SCSI HDD

Isn’t it possible to daisychain the BeebSCSImini with the existing Winchester and use ADFS Dircopy?
by DutchAcorn
Sat Feb 17, 2018 9:44 am
Forum: software: classic games
Topic: MIA Games on eBay
Replies: 88
Views: 2267

Re: MIA Games on eBay

Contribution sent, thanks Col!
by DutchAcorn
Thu Feb 15, 2018 8:51 pm
Forum: software: classic games
Topic: MIA Games on eBay
Replies: 88
Views: 2267

Re: MIA Games on eBay

And another £5 from me.
by DutchAcorn
Thu Feb 08, 2018 5:27 pm
Forum: hardware
Topic: BBC Master noob
Replies: 48
Views: 1141

Re: BBC Master noob

At first glance the Master seems to work fine. After you have reconnected the cleaned and refilled the battery pack please follow these instructions to get back to the configuration with DFS and Basic you saw earlier: http://stardot.org.uk/forums/viewtopic.php?t=4854#p44150 Next thing to check is if...
by DutchAcorn
Thu Feb 08, 2018 11:48 am
Forum: hardware
Topic: BBC Master noob
Replies: 48
Views: 1141

Re: BBC Master noob

Thanks. Battery pack removed and I get a brrr beep and this! Hopefully normal. 990FB578-3DE4-4C20-94B1-5C1FD787CBE7.jpeg Not what I expected but definitly encouraging! Apparently you did not reset CMOS or the “R” key is malfunctioning. The battery pack may still have had enough juice to retain the ...
by DutchAcorn
Thu Feb 08, 2018 11:12 am
Forum: hardware
Topic: BBC Master noob
Replies: 48
Views: 1141

Re: BBC Master noob

My Master arrived and here is the inside. The batteries have leaked somewhat... D7A1600E-48E5-431D-913F-D618ACEA3D02.jpeg Whats the next move? I have not switched it on yet! Lardo Remove the battery pack, remove batteries from the pack and clean the pack with vinigar. Rinse with water and let it dr...
by DutchAcorn
Wed Jan 31, 2018 6:18 am
Forum: hardware
Topic: 2 Faulty Beebs
Replies: 89
Views: 1559

Re: 2 Faulty Beebs

I fixed a TRS-80 that had suffered from a high voltage spike. It’s a lot of work, tracing the signals through the chips one by one using a logic analyser (did not need a scope). You say you only checked the major chips. It’s fair to assume other chips have also died. Most chips you can still get, so...
by DutchAcorn
Sun Jan 28, 2018 9:49 pm
Forum: general
Topic: Recovering Tapes perished pressure pads
Replies: 12
Views: 279

Re: Recovering Tapes perished pressure pads

Thanks for the advice, Peter! I knew this was an issue with the ZX Microdrive cartridges, but it never occurred to me it could also affect regular audio tapes!
by DutchAcorn
Sun Jan 28, 2018 9:46 pm
Forum: introduce yourself
Topic: Hello...
Replies: 11
Views: 212

Re: Hello...

Welcome to Stardot, Ricardo! Goodluck with your PowerBeeb!
by DutchAcorn
Sun Jan 28, 2018 5:00 pm
Forum: hardware
Topic: BBC Model B and DFS Problem
Replies: 75
Views: 1622

Re: BBC Model B and DFS Problem

I don't have these problems with my MMC as it used *card and not *disc which in it's own also causes incompatibility problems with programs that then want to use *disc... You can't win :) Peter. If you have a 8271 interface, a model B and a 99P interface you could try UltraX DFS (ROM attached). It ...
by DutchAcorn
Sun Jan 28, 2018 8:25 am
Forum: hardware
Topic: BBC Model B and DFS Problem
Replies: 75
Views: 1622

Re: BBC Model B and DFS Problem

With TurboMMC there is separate tooling for transferring images to physical disks, but it needs sideways ram to work. If you have / can make / can get a 99P interface (see here ) there is also the the option of using UltraX , that combines virtual and physical drives in one DFS (this is what I use t...
by DutchAcorn
Sat Jan 27, 2018 7:48 pm
Forum: introduce yourself
Topic: Hello!
Replies: 11
Views: 262

Re: Hello!

Welcome! Lots of stuff to repair :D

Enjoy your Atom!
by DutchAcorn
Sat Jan 27, 2018 7:09 pm
Forum: hardware
Topic: Advanced Quarter Megabyte RAM - Preliminary
Replies: 13
Views: 1449

Re: Advanced Quarter Megabyte RAM - Preliminary

I don’t own an Electron currently, but the Master just shows the loaded ROMs twice, regardless of the ROM bank I use. So it sees both pages populated.
by DutchAcorn
Fri Jan 26, 2018 2:42 pm
Forum: other vintage computer hardware, software and games
Topic: Received a belated Christmas present...
Replies: 15
Views: 754

Re: Received a belated Christmas present...

Best check that A3000 for the battery condition...
by DutchAcorn
Fri Jan 26, 2018 9:11 am
Forum: other vintage computer hardware, software and games
Topic: Received a belated Christmas present...
Replies: 15
Views: 754

Re: Received a belated Christmas present...

It's in the fifth picture.
Edit: actually, that seems to be something else with green and red keys...
by DutchAcorn
Thu Jan 25, 2018 6:11 am
Forum: general
Topic: Today I received.....
Replies: 4433
Views: 275383

Re: Today I received.....

Wow, Wim, that looks like a lot of work fun! :D
Good luck sorting it all out!

About the retro discussion; we already have a (at least one?) thread started: http://stardot.org.uk/forums/viewtopic.php?f=11&t=13064
by DutchAcorn
Tue Jan 23, 2018 10:30 am
Forum: other vintage computer hardware, software and games
Topic: Exidy Sorcerer
Replies: 38
Views: 1557

Re: Exidy Sorcerer

jonb wrote:
exidyboy wrote:
jonb wrote:Interceptor - by "Blair Rideout" (LOL)

Why the LOL ?


It is obviously a made up name. Don't you think?

Actually, this could be him: Linkedin profile
by DutchAcorn
Tue Jan 23, 2018 8:25 am
Forum: other vintage computer hardware, software and games
Topic: Exidy Sorcerer
Replies: 38
Views: 1557

Re: Exidy Sorcerer

For more software to try; Terry Steward has put his collection online.
by DutchAcorn
Mon Jan 22, 2018 9:04 pm
Forum: other vintage computer hardware, software and games
Topic: Exidy Sorcerer II with S-100 Expansion Unit
Replies: 2
Views: 202

Re: Exidy Sorcerer II with S-100 Expansion Unit

The disc drive is not playing along yet. I am also having trouble getting the Basic Pac to work. Two of the original roms are faulty. I have tried to replace them with 2716 EPROMs I got from ebay: 2716.jpg They program and verify fine, but if I try them in the basic pac I get corrupted values: Basic...
by DutchAcorn
Sun Jan 21, 2018 8:21 pm
Forum: hardware
Topic: BBC Circuit diagram
Replies: 10
Views: 429

Re: BBC Circuit diagram

Great scan, thanks for sharing!

This one is my favorate:
BBC B schematics clean.png
by DutchAcorn
Fri Jan 19, 2018 3:40 pm
Forum: hardware
Topic: Problem BBC Model B and Turbo MMC
Replies: 30
Views: 784

Re: Problem BBC Model B and Turbo MMC

No I burned the DFS 0.9 into a 27C64: The BBC makes now a short low beep and than a never ending high beeeeeeeep. The startup message now is: BBC Computer 32K Acorn DFS <flashing cursor> But no keyboard input ist possible. I think, that the DFS 1.2 ROM was bad, but with the DFS 0.9 there still seem...
by DutchAcorn
Fri Jan 19, 2018 8:48 am
Forum: hardware
Topic: Problem BBC Model B and Turbo MMC
Replies: 30
Views: 784

Re: Problem BBC Model B and Turbo MMC

The DFS ROM will not initialise if the disc interface is not (properly) installed. You could check your installation against the instructions in the service manual (page 28).
by DutchAcorn
Wed Jan 17, 2018 3:49 pm
Forum: hardware
Topic: How do Beebs break in transit?
Replies: 11
Views: 533

Re: How do Beebs break in transit?

... I've not looked very deeply so far, but I have: ⋅ Re-seated all socketed chips ⋅ Tried the User VIA in the System VIA socket ⋅ Pulled the 8271 and 6854 ⋅ Looked for trouble in the link settings ⋅ Set S25 south ⋅ Unset the keyboard link...
by DutchAcorn
Fri Jan 12, 2018 3:23 pm
Forum: off-topic
Topic: Internet of Strings
Replies: 8
Views: 362

Re: Internet of Strings

This reminds me of the RFC 1149 standard. More useful for longer distances. I suspect bandwith should be able to scale but latency may be an issue for some applications.
by DutchAcorn
Wed Jan 03, 2018 9:21 pm
Forum: hardware
Topic: Think I'm loosing my (beeb) memory
Replies: 22
Views: 602

Re: Think I'm loosing my (beeb) memory

That's good to hear!! =D>
by DutchAcorn
Mon Jan 01, 2018 9:35 pm
Forum: hardware
Topic: Think I'm loosing my (beeb) memory
Replies: 22
Views: 602

Re: Think I'm loosing my (beeb) memory

The $ is represented by a hex value of &24, whereas a space is &20 (in ASCII and Teletext). From that I'd guess that your faulty chip is bit 2 (2^2=4) of CAS1 stuck on. That should be IC55, if I've read the circuit diagram correctly. Can you find any other faulty characters as you type? If ...
by DutchAcorn
Mon Jan 01, 2018 8:26 pm
Forum: hardware
Topic: Think I'm loosing my (beeb) memory
Replies: 22
Views: 602

Re: Think I'm loosing my (beeb) memory

Yea, bit 1 specifically. So in terms of memory chips IC54 is suspect. But it can also be caused by other parts of the memory circuit (see this recent thread).

You can try the simple memory check program suggested in the same thread.
by DutchAcorn
Mon Jan 01, 2018 7:59 pm
Forum: hardware
Topic: Think I'm loosing my (beeb) memory
Replies: 22
Views: 602

Re: Think I'm loosing my (beeb) memory

What corruption do you see in mode 7?
by DutchAcorn
Mon Jan 01, 2018 7:54 pm
Forum: other vintage computer hardware, software and games
Topic: Exidy Sorcerer II with S-100 Expansion Unit
Replies: 2
Views: 202

Re: Exidy Sorcerer II with S-100 Expansion Unit

...About the floppy drive: I am looking for the address to call from the monitor to access the drive. I'm sure I saw it somewhere but I can't find it now... Found it: its D900. :D So the disk system is fired up by issuing the command "GO D900" from the monitor. The few disks I tried so fa...
by DutchAcorn
Mon Jan 01, 2018 11:03 am
Forum: introduce yourself
Topic: Hello!
Replies: 10
Views: 393

Re: Hello!

Welcome to Stardot Matt! Good luck with the sideways ram board. :D