Search found 6716 matches

by hoglet
Thu Jul 18, 2013 9:46 pm
Forum: off-topic
Topic: Mounting ADFS Images in Ubuntu/Linux
Replies: 31
Views: 4870

Re: Mounting ADFS Images in Ubuntu/Linux

BeebMaster wrote:Is it possible to get a list of the specifications of the filing system types supported by mount?


Try:
cat /proc/filesystems

Dave
by hoglet
Thu Jul 18, 2013 8:17 pm
Forum: off-topic
Topic: Mounting ADFS Images in Ubuntu/Linux
Replies: 31
Views: 4870

Re: Mounting ADFS Images in Ubuntu/Linux

I think we need something that creates [512 null bytes] + [entire disc image file] + [512 more null bytes] according to that link posted earlier, but I don't think that dd command does that, does it? I don't think the above is the problem, but the following will created a padded version of your dis...
by hoglet
Wed Jul 17, 2013 11:05 pm
Forum: off-topic
Topic: Mounting ADFS Images in Ubuntu/Linux
Replies: 31
Views: 4870

Re: Mounting ADFS Images in Ubuntu/Linux

Might be worth validating the disk image with Jon Welch's ADFS Explorer - I think that can read hard disk images.

Dave
by hoglet
Wed Jul 17, 2013 10:14 pm
Forum: off-topic
Topic: Mounting ADFS Images in Ubuntu/Linux
Replies: 31
Views: 4870

Re: Mounting ADFS Images in Ubuntu/Linux

Also, after you have done a mount and it fails, try typing dmesg and post the last 10 or so lines.

Dave
by hoglet
Wed Jul 17, 2013 10:12 pm
Forum: off-topic
Topic: Mounting ADFS Images in Ubuntu/Linux
Replies: 31
Views: 4870

Re: Mounting ADFS Images in Ubuntu/Linux

Hmmm that mount command should have worked. There's some useful info here: http://www.myelin.co.nz/post/2008/9/1/ Was the command you used to do the backup effectively: dd if=/dev/hdc of=Kingston1-17-2-13Conv.dat Or was it more complex? I'm not sure if the ordering of the mount options is significan...
by hoglet
Wed Jul 17, 2013 7:03 am
Forum: general
Topic: Beebfax 1982 - An Ode to Ceefax and 1982
Replies: 39
Views: 4921

Re: Beebfax 1982 - An Ode to Ceefax and 1982

Just came across the teletext museum:
http://teletext.mb21.co.uk/

Dave
by hoglet
Wed Jul 17, 2013 6:57 am
Forum: general
Topic: Beebfax 1982 - An Ode to Ceefax and 1982
Replies: 39
Views: 4921

Re: Beebfax 1982 - An Ode to Ceefax and 1982

BeebMaster, You know, it might be possible to re-organise these pages automatically, if there is any consistency to the layout. I'd be tempted to have a go at doing all the processing in Linux, which will be infinitely faster and much easier. - Make an raw image of the ADFS drive containing the page...
by hoglet
Mon Jul 15, 2013 8:58 pm
Forum: hardware
Topic: Electron RS423 Serial Interface project
Replies: 26
Views: 3355

Re: Electron RS423 Serial Interface project

On that whole UART schematic, where's the conversion of phi1 to phi2 and there's no de-glitch for npgFC? (...or is that cleverly done in the PAL and is in my programmable logic blind-spot :wink: ?) Hmm, my inexperience with the Electron is starting to show :lol: Just been reading some of your EUP t...
by hoglet
Sun Jul 14, 2013 10:02 pm
Forum: hardware
Topic: Electron RS423 Serial Interface project
Replies: 26
Views: 3355

Re: Electron RS423 Serial Interface project

I've lost the plot a bit on this one (some say in a much wider sense but that's another story) , what's the circuit context we're talking about here? (...and I can see Alan D looking in who definitely falls into the guru category so feel free to chip in :wink:) Dave Hitchins's post here: http://www...
by hoglet
Sun Jul 14, 2013 9:48 pm
Forum: hardware
Topic: Electron RS423 Serial Interface project
Replies: 26
Views: 3355

Re: Electron RS423 Serial Interface project

Here's what I would try as the PAL Equations.... I'm using signal naming from Acorn AN14 Plus One schematics (from Phill) are here We should get MartinB and Phill to check these over, especially the RAM/ROM signals. # NOE is Cartridge Pin A2 # NRST is Cartridge Pin A3 # CSRW is Cartridge Pin A4 # PH...
by hoglet
Sun Jul 14, 2013 12:43 pm
Forum: off-topic
Topic: a Multi User Dungeon needs some TLC!
Replies: 93
Views: 7204

Re: a Multi User Dungeon needs some TLC!

A lot of those character sequences are ANSI/VT100 control codes.

See: http://www.termsys.demon.co.uk/vtansi.htm

For example, [34m means "set display attribute foreground color to blue"

Do you have a terminal program that emulates a VT100 terminal?

Dave
by hoglet
Sun Jul 14, 2013 11:24 am
Forum: hardware
Topic: Electron RS423 Serial Interface project
Replies: 26
Views: 3355

Re: Electron RS423 Serial Interface project

aerworuld wrote:I like the idea of reproducing the Andyk board, i have zero technical ability but i would be happy to fund one of our techy brothers to do so, as long as it isnt too expensive!!

Wasn't Phill asking for suggestions for what to re-engineer next? :lol:

Dave
by hoglet
Sun Jul 14, 2013 11:22 am
Forum: hardware
Topic: Electron RS423 Serial Interface project
Replies: 26
Views: 3355

Re: Electron RS423 Serial Interface project

This application note confirms the address of the UART should be FC60:
http://acorn.chriswhy.co.uk/docs/Acorn/AN/015.pdf

Dave
by hoglet
Sun Jul 14, 2013 11:12 am
Forum: hardware
Topic: Electron RS423 Serial Interface project
Replies: 26
Views: 3355

Re: Electron RS423 Serial Interface project

Sort of answering my own question... http://mdfs.net/Archive/BBCMicro/2006/04/09/083424.htm Apparently the driver software for the SCN2681 is already included in the the Electron Plus 1 ROM. Confirmed also by this thread: http://games.groups.yahoo.com/group/electrem/message/236 Here's the data sheet...
by hoglet
Sun Jul 14, 2013 9:02 am
Forum: hardware
Topic: Electron RS423 Serial Interface project
Replies: 26
Views: 3355

Re: Electron RS423 Serial Interface project

I have a couple of questions... assuming we could replicate the hardware of one of the Electron RS423 Cartridges, - Did each of the vendors of the Electron RS423 cartridges develop their own software? - Would the software have been embedded in the cartridge, or distributed separately? - Does the ori...
by hoglet
Sat Jul 13, 2013 7:52 pm
Forum: wanted
Topic: A5000 2MB Ram and/or 10base2 Ethernet Podule
Replies: 4
Views: 577

Re: A5000 2MB Ram and/or 10base2 Ethernet Podule

AndyMc1280 wrote:I've got an A5000 4mb card you are welcome to. Sits in the memory slot, you set the jumers on the motherboard for 2/4MB I think and it switches off the onboard ram. I'll have to dig it out. I'm not at my flat right now and won't be back until monday, so bear with me.

PM Sent :D

Dave
by hoglet
Sat Jul 13, 2013 11:43 am
Forum: wanted
Topic: A5000 2MB Ram and/or 10base2 Ethernet Podule
Replies: 4
Views: 577

A5000 2MB Ram and/or 10base2 Ethernet Podule

Hi all,

Anyone got a 2MB RAM update suitable for an A5000 that they want to shift?

Or an Ethernet Podule? - I'm willing to consider a 10base2 only one, because I've got one of these:
J3128A-2.jpg
(15.46 KiB) Downloaded 229 times

Thanks,

Dave
by hoglet
Fri Jul 12, 2013 5:57 am
Forum: hardware
Topic: A3010 Adelaide PCB troubleshooting
Replies: 163
Views: 8492

Re: A3010 Adelaide PCB troubleshooting

All I can say is thank the lord it's an Adelaide board and not an ARM250 as that would eventually lead to the end of the machine. Time to break out the rework station and the PLCC nozzles methinks... Hmm, I'm going to get some freezer spray this weekend for my poorly A4000. Unfortunately, it is an ...
by hoglet
Tue Jul 09, 2013 9:34 pm
Forum: hardware
Topic: Partially Working A4000 - Help!!
Replies: 59
Views: 4843

Re: Partially Working A4000 - Help!!

Replaced the 74HCT14 and so my Reset key on the keyboard is now working again. Unfortunately, this pup is getting sicker and sicker. :cry: It will only run for a few seconds now, before starting to spontaneously throw exceptions, then crash. I think it's quite possible this is a dry joint or a crack...
by hoglet
Tue Jul 09, 2013 7:15 am
Forum: hardware
Topic: Partially Working A4000 - Help!!
Replies: 59
Views: 4843

Re: Partially Working A4000 - Help!!

I have a spare A5000 you can have for postage costs. It has battery damage and needs the CMOS replacing, I did all the repairs but it wasn't holding a charge so it's in a semi repaired state at the minute. It really needs the new CMOS mounting on a daughter board with a new circuit. Drop me an emai...
by hoglet
Mon Jul 08, 2013 6:05 pm
Forum: hardware
Topic: Partially Working A4000 - Help!!
Replies: 59
Views: 4843

Re: Partially Working A4000 - Help!!

I've not had my A4000 open for a while - is IC8 located anywhere near the CMOS battery? ...although usually battery damage shows up with POST error at start up, but potentially if the damage was only slight, then maybe it's not being picked up... Actually no, it's in the opposite corner. Definitely...
by hoglet
Mon Jul 08, 2013 7:40 am
Forum: hardware
Topic: Partially Working A4000 - Help!!
Replies: 59
Views: 4843

Re: Partially Working A4000 - Help!!

OK, I'm beginning to think this A4000 is jinxed. This morning the reset key has stopped working. I've just traced it through, and one gate on IC8 (a 74HCT14) has stopped working, with it's output stuck at 0v (reset inactive) regardless of it's input. The other gates (e.g. keyboard control and data) ...
by hoglet
Sun Jul 07, 2013 9:30 pm
Forum: hardware
Topic: Partially Working A4000 - Help!!
Replies: 59
Views: 4843

Re: Partially Working A4000 - Help!!

I'm not sure if it's the heat, or if something is degrading, because through the course of today it's become more unreliable, with more frequent crashes.

At the moment I can't get as far as being able to run my CLS test program. :(

I'll try again tomorrow morning when it's cooler.

Dave
by hoglet
Sun Jul 07, 2013 12:53 pm
Forum: hardware
Topic: Partially Working A4000 - Help!!
Replies: 59
Views: 4843

Re: Partially Working A4000 - Help!!

My Killer CLS program still fails, even with interrupts disabled: 10 SYS"OS_IntOff" 20 FOR I%=0 TO 1000 30 CLS 40 NEXT 50 SYS"OS_IntOn" From this, it's really starting to look like there something amiss with executing the CLS code from OS ROM. This is definitely one of the weirde...
by hoglet
Sun Jul 07, 2013 11:58 am
Forum: hardware
Topic: Partially Working A4000 - Help!!
Replies: 59
Views: 4843

Re: Partially Working A4000 - Help!!

I've had a go at duplicating the code that is executed when you do a CLS IMG_0217.JPG Here's my version, with the same inner loop. 10 DIM code% 1000 20 FOR loop%=0 TO 2 STEP 2 30 P%=code% 40[ 50 OPT loop% 60 MOV R10,R0 70 MOV R11,R1 80 MOV R0,#0 90.write0 100 MOV R8,R10 110 MOV R9,R11 120 MOV R1,R0 ...
by hoglet
Sun Jul 07, 2013 11:44 am
Forum: hardware
Topic: Partially Working A4000 - Help!!
Replies: 59
Views: 4843

Re: Partially Working A4000 - Help!!

Hi Daniel, Have a look at the main board, has someone wired in an additional crystal just below the ARM250? (I have this working happily on my A3020 *but* with a 50MHz crystal I got some shimmers/odd behaviour. a 48MHz crystal was fine for me). Good thought, but unfortunately the space for the secon...
by hoglet
Sun Jul 07, 2013 10:15 am
Forum: hardware
Topic: Partially Working A4000 - Help!!
Replies: 59
Views: 4843

Re: Partially Working A4000 - Help!!

Hi Steve, Default = 4155 450ns = 2764 325ns = 4261 200ns = 6139 I just ran this on my A4000 system and got: Default = 4885 450ns = 3585 325ns = 4882 200ns = 7093 That's a significant enough difference that it make me wonder if my system is somehow being over clocked. Edit: Confirmed on the Scope tha...
by hoglet
Sun Jul 07, 2013 10:00 am
Forum: hardware
Topic: Partially Working A4000 - Help!!
Replies: 59
Views: 4843

Re: Partially Working A4000 - Help!!

If you have the 2x27c800 and want a set programmed I am more than happy to do that for you. Thank you kind sir. Let's see if it comes to this. By the way, what programmer to you have? You really need to reset the cmos properly my friend. I have a gut feeling your problems may then go away... I can ...
by hoglet
Sun Jul 07, 2013 7:42 am
Forum: hardware
Topic: Partially Working A4000 - Help!!
Replies: 59
Views: 4843

Re: Partially Working A4000 - Help!!

Just wondering how easy it would be to get a replacement set of ROMs to try. Looks like they might be compatible with the: M27C800-10F1 [Quarndon] Here's the data sheet: M27C800.zip Are these known to work? Only problem them is programming them...I don't think my DataMan 40Pro will handle these. Dave
by hoglet
Sun Jul 07, 2013 5:27 am
Forum: hardware
Topic: Partially Working A4000 - Help!!
Replies: 59
Views: 4843

Re: Partially Working A4000 - Help!!

Another update... It eventually crashed in mode 3, but it took ~1.5 million iterations of CLS. Tried increasing the ROM access time to 450ns, but that made no difference. If the ROM based CLS is causing a crash or errors, maybe you should try a simple machine code program running from RAM to clear t...

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