Search found 165 matches

by Bat
Thu Jul 12, 2018 11:30 am
Forum: for sale / freebies
Topic: Ferguson 14D1 portable TV
Replies: 0
Views: 179

Ferguson 14D1 portable TV

Hi, Up for sale is my portable TV, I've owned it from new. Good working order, picture fine, nice colour balance, plenty of brightness in reserve. Only has an aerial (RF) socket on the rear. Original loop aerial intact for proper retro look :lol: 8 channel push button analogue manual tuner. £25. Col...
by Bat
Sun May 27, 2018 7:22 pm
Forum: hardware
Topic: RPC with faulty keyboard interface
Replies: 23
Views: 893

Re: RPC with faulty keyboard interface

Hi,
Have you checked the internal battery?
If it's good try leaving it disconnected for an hour then try again.
Apologies if you've already tried this.
Cheers :)
by Bat
Fri May 25, 2018 10:12 pm
Forum: hardware
Topic: Torch Z80 Problems
Replies: 35
Views: 989

Re: Torch Z80 Problems

Hi,
Anyone got any further input on this please?
I'm running out of stuff to test, not to mention knowledge to test it with! :lol:
Cheers :)
by Bat
Tue May 22, 2018 9:19 pm
Forum: hardware
Topic: Torch Z80 Problems
Replies: 35
Views: 989

Re: Torch Z80 Problems

Hi,
Beeb working fine with the 6522 from the Torch board inserted into IC3 socket, good news but bad news :)
At least that's something else tested!
Cheers,
Gavin :)
by Bat
Sat May 19, 2018 7:44 pm
Forum: hardware
Topic: Torch Z80 Problems
Replies: 35
Views: 989

Re: Torch Z80 Problems

Any addresses that are below 0F hex and / or which refer to a/the 8255 (82C55) are Z80 I/O port addresses. You are looking for the base address of the 6522 VIA in the Tube address range. Mark Hi, I typed in the co-pro test from this post http://stardot.org.uk/forums/viewtopic.php?f=3&t=15087 Would ...
by Bat
Sat May 19, 2018 1:39 pm
Forum: hardware
Topic: A9 Home and new to RISC OS
Replies: 25
Views: 1179

Re: A9 Home and new to RISC OS

Hi guys, Thanks for the replies :) I've tried the patch and was going to post how amazing it was to have it working. :) However, once I re-boot it won't regonise what has already worked! I've tried 3 different USB sticks, it's regonsied each one and I've been able to view the contents but once I've ...
by Bat
Thu May 17, 2018 1:58 pm
Forum: hardware
Topic: Torch Z80 Problems
Replies: 35
Views: 989

Re: Torch Z80 Problems

Hi,
Is there a chance it could be my beeb at this point or is it definitely the Z80?
Cheers,
Gavin :)
by Bat
Wed May 16, 2018 10:25 pm
Forum: hardware
Topic: Torch Z80 Problems
Replies: 35
Views: 989

Re: Torch Z80 Problems

HI,
Schematic here...
http://mdfs.net/Info/Comp/Torch/z80card.gif
Cheers :)
by Bat
Wed May 16, 2018 9:53 pm
Forum: hardware
Topic: Torch Z80 Problems
Replies: 35
Views: 989

Re: Torch Z80 Problems

Hi, I've copied this from JGH's website, but it doesn't mean much to me :( I/O Map: &00 - Port A Data I/O, page ROM in &01 - Port B Data I/O, page ROM in &02 - Port C Data I/O, page ROM in &03 - READ(82c55): Control WRITE: Control, page ROM in &04 - Port A Data I/O, page ROM out &05 - Port B Data I/...
by Bat
Wed May 16, 2018 9:22 pm
Forum: hardware
Topic: Torch Z80 Problems
Replies: 35
Views: 989

Re: Torch Z80 Problems

Hi,
Z80, 6522 and 8255 and the ROM are the only socketed chips on this board.
Cheers :)
by Bat
Wed May 16, 2018 9:18 pm
Forum: hardware
Topic: Torch Z80 Problems
Replies: 35
Views: 989

Re: Torch Z80 Problems

Hi,
Would pin 23 BUSAK be responsible for telling the Beeb it's all ok?
Cheers,
Gavin :)
by Bat
Wed May 16, 2018 8:43 pm
Forum: hardware
Topic: Torch Z80 Problems
Replies: 35
Views: 989

Re: Torch Z80 Problems

Hi, I've just tried replacing the 6522 as suggested. I pulled one from a beeb IC3 socket on a machine that has a RAM fault. This chip in the Z80 board made no difference. Mark, from what you had posted my limited knowledge bought me to the conculsion that it seemed to be working but for some reason ...
by Bat
Wed May 16, 2018 7:08 pm
Forum: hardware
Topic: Torch Z80 Problems
Replies: 35
Views: 989

Re: Torch Z80 Problems

Hi,
A0 to A15 activity present
D0 to D7 activity present
Pin 6 seriously intense wavey line activity!
This is after *MCP as I fitted the torch ROM one socket from the right so I can boot to basic.
Cheers :)
by Bat
Wed May 16, 2018 6:54 pm
Forum: hardware
Topic: Torch Z80 Problems
Replies: 35
Views: 989

Re: Torch Z80 Problems

Hi, Look at me, it almost looks like I know what I'm doing! :shock: :lol: IMG_20180516_194121.jpg Anyway.... Pin number..... Status 26. Goes high 16. Goes high 17. Goes high 18. Goes high 19. Wavey line :lol: 21. Wavey line 22. Goes high until *MCP then wavey line 24. Goes high 25. Goes high 26. Goe...
by Bat
Wed May 16, 2018 5:01 pm
Forum: hardware
Topic: Torch Z80 Problems
Replies: 35
Views: 989

Re: Torch Z80 Problems

Hi,
Thanks for sorting the post out and the useful picture :D
I'll plug the scope in after tea and have a go, the scope will have more of an idea than me, but then maybe it'll teach me to stop messing about with ancient computers! :roll: :lol:
Cheers :)
by Bat
Wed May 16, 2018 12:21 pm
Forum: hardware
Topic: Torch Z80 Problems
Replies: 35
Views: 989

Re: BBC + Torch Z80 Help

Hi, Guys the start of this thread is someone else, not me! :arrow: Moderators note: Thread has been split, see the first post. Mark I purchased my Z80 with the ROMs and the guy assures me it all works fine. I have obtained some system discs but haven't tried them as the drive does nothing. From a RO...
by Bat
Wed May 16, 2018 10:51 am
Forum: hardware
Topic: Torch Z80 Problems
Replies: 35
Views: 989

Re: BBC + Torch Z80 Help

Hi,
Would IPA and a cotton bud be suitable for cleaning?
Cheers :)
by Bat
Wed May 16, 2018 9:08 am
Forum: hardware
Topic: Torch Z80 Problems
Replies: 35
Views: 989

Re: BBC + Torch Z80 Help

Thanks :)
I'll take a look and work through that list...
Cheers :)
by Bat
Wed May 16, 2018 8:22 am
Forum: off-topic
Topic: Scanning manuals.
Replies: 3
Views: 356

Re: Scanning manuals.

by Bat
Wed May 16, 2018 7:19 am
Forum: hardware
Topic: Torch Z80 Problems
Replies: 35
Views: 989

Re: BBC + Torch Z80 Help

Hi,
I've also got a Raspberry pi 3 that's running Rune Audio at the moment. It can be repurposed if it could be of use for diagnosis?
Cheers,
Gavin :)
by Bat
Mon May 14, 2018 9:53 pm
Forum: hardware
Topic: Torch Z80 Problems
Replies: 35
Views: 989

Re: BBC + Torch Z80 Help

Hi,
I mostly just get the no Z80 message. Sometimes it scrolls all down he screen other it does 3 or 4 then stops..
Cheers :)
by Bat
Mon May 14, 2018 9:50 pm
Forum: hardware
Topic: Torch Z80 Problems
Replies: 35
Views: 989

Re: BBC + Torch Z80 Help

Sillyscope yes, but more of a novice with that than a beeb though! :)
by Bat
Mon May 14, 2018 7:29 pm
Forum: hardware
Topic: Torch Z80 Problems
Replies: 35
Views: 989

Torch Z80 Problems

Hi, Dragging this back from the past as I've got pretty much the same issue and there's no solution on this one! The screen shot with a few squares on it, I can get a full screen of them. I've got an 8721 fdd controller and a torch V1.21 ABL ROM, the Z80 board has a CCCP V1.02 ROM. I've had arrive t...
by Bat
Mon May 14, 2018 9:41 am
Forum: hardware
Topic: Cheap web-modem for the beeb/master (and arc if ya like!)
Replies: 117
Views: 4450

Re: Cheap web-modem for the beeb/master (and arc if ya like!)

Hi,
Parts ordered :)
I want to try out the Telstar thingymabob as I've never used anything like that before.
Cheers,
Gavin :)
by Bat
Sun May 13, 2018 2:02 pm
Forum: hardware
Topic: sideways Ram
Replies: 8
Views: 349

Re: sideways Ram

Hi,
Is it an eeprom?
It's a cross between ROM and RAM. It keeps it's memory for years without a battery and you can erase it in place.
You can't use it as ram for copy buffers and the like.
Cheers,
Gavin :)
by Bat
Sat May 12, 2018 8:57 am
Forum: hardware
Topic: Cheap web-modem for the beeb/master (and arc if ya like!)
Replies: 117
Views: 4450

Re: Cheap web-modem for the beeb/master (and arc if ya like!)

Hi,
I take it you'll need Econet fitted to the beeb?
Would it work with upurs instead?
Cheers,
Gavin :)
by Bat
Fri May 11, 2018 8:42 pm
Forum: hardware
Topic: Eclipse PowerPad Driver Issues
Replies: 7
Views: 379

Re: Eclipse PowerPad Driver Issues

Hi,
Glad you got it sorted. I'm astounded the only thing I know about RISC OS was actually useful :lol:
Cheers,
Gavin :)
by Bat
Fri May 11, 2018 6:41 am
Forum: off-topic
Topic: Need some electronics advice...
Replies: 20
Views: 1178

Re: Need some electronics advice...

I now have so many diodes I can rectify the world. (Hmm, maybe all of them together will rectify that Brexit idiocy?). Unfortunately I don't think there's anything that can sort that out short of sending May to a remote part of Siberia. :lol: It costs me money every time she opens her mouth! I too ...
by Bat
Thu May 10, 2018 11:06 pm
Forum: hardware
Topic: Eclipse PowerPad Driver Issues
Replies: 7
Views: 379

Re: Eclipse PowerPad Driver Issues

Hi,
I had problems with zipped stuff.
I was unzipping it first and then n transferring it to my RISC machine. Apparently you can only unzip on the actual RISC machine.
Sorry that's the extent of my knowledge!
Cheers :)