Search found 1632 matches

by cmorley
Mon Jan 24, 2022 10:12 am
Forum: 8-bit acorn hardware
Topic: Issue installing DFS
Replies: 1
Views: 82

Re: Issue installing Retroclinic DFS

Mark offers excellent support. I'd recommend you email him.
by cmorley
Sun Jan 23, 2022 4:00 pm
Forum: programming
Topic: Write some BeebASM output to text file
Replies: 7
Views: 156

Re: Write some BeebASM output to text file

I redirect to a file for one thing I've done as 0xCODE says.

To strip the & (and replace them with 0x or something) then you could use SED.

Then script it so the build & strip are automated.
by cmorley
Sat Jan 22, 2022 4:38 pm
Forum: 8-bit acorn software: other
Topic: Using Superior Software's Speech
Replies: 29
Views: 451

Re: Using Superior Software's Speech

You have typed 0% instead of O% (zero instead of letter O).
by cmorley
Sat Jan 22, 2022 8:16 am
Forum: 8-bit acorn hardware
Topic: Digital to analogue Converter
Replies: 9
Views: 249

Re: Digital to analogue Converter

tricky wrote:
Sat Jan 22, 2022 8:06 am
resistor ladder + decoupling (?) capacitor.
Series cap for DC blocking I'd say. Very simple DAC design.
by cmorley
Fri Jan 21, 2022 7:23 pm
Forum: 8-bit acorn hardware
Topic: BBC B+ 64K
Replies: 73
Views: 1239

Re: BBC B+ 64K

Bad video ULA?
by cmorley
Fri Jan 21, 2022 9:53 am
Forum: 8-bit acorn software: other
Topic: Using Superior Software's Speech
Replies: 29
Views: 451

Re: Using Superior Software's Speech

You have another alternative to BASIC you could use. The BBC has a script function in the filesystems - most commonly used for making discs etc autoboot with !BOOT. You can write any script (within reason) and the commands are fed pretty much as if they had been typed. *BUILD script lets you write t...
by cmorley
Wed Jan 19, 2022 10:43 am
Forum: 8-bit acorn hardware
Topic: ADFS E00 for all . . . . ! . . . ?
Replies: 26
Views: 868

Re: ADFS E00 for all . . . . ! . . . ?

Unfortunately the Sync pin (7) on the Electron is not connected to anything. So my original idea of having the software do the RAM bank switching will have to be implemented! Although it may prove to be more efficient to use the method indicated above? Sync is unconnected on a model B too. OS RAM n...
by cmorley
Mon Jan 17, 2022 5:45 pm
Forum: 8-bit acorn hardware
Topic: ADFS E00 for all . . . . ! . . . ?
Replies: 26
Views: 868

Re: ADFS E00 for all . . . . ! . . . ?

Dave, just to confirm the 1.3 has the SCSI code? it looks like it does from a quick scan via the link^^ Apart from the various address e.g. MMFS, WD177x etc. Is there anything serious stopping an Electron conversion? 1.30 is the model B SCSI ADFS. I use it with my 1MHz bus SCSI emulator & BeebS...
by cmorley
Mon Jan 17, 2022 4:21 pm
Forum: 8-bit acorn hardware
Topic: Can I still use an cassette player when I have a turbo mmc installed
Replies: 2
Views: 139

Re: Can I still use an cassette player when I have a turbo mmc installed

You can switch to the tape file system from the command line. You can (usually) lower PAGE too to get more available memory.

e.g.
*TAPE
PAGE=&E00
CHAIN""
by cmorley
Mon Jan 17, 2022 1:31 pm
Forum: 8-bit acorn hardware
Topic: ADFS E00 for all . . . . ! . . . ?
Replies: 26
Views: 868

Re: ADFS E00 for all . . . . ! . . . ?

I did look at Hoglet's ADFS 130 disassembly/source but it isn't fully documented. I found a few places where it looked like indirect addressing via ZP pointers with those pointers being set by magic constants & stopped. I don't think it would be very hard to fix up, I just stopped. One way to ge...
by cmorley
Mon Jan 17, 2022 9:17 am
Forum: 8-bit acorn hardware
Topic: ADFS E00 for all . . . . ! . . . ?
Replies: 26
Views: 868

Re: ADFS E00 for all . . . . ! . . . ?

There is an E00 ADFS for the model B "ADFS131" (IIRC) which runs from SWRAM. Whoever did cut some stuff out to fit it in e.g. DESTROY keyword is missing.. not sure if the floppy stuff is missing too. I was tempted to but never got round to doing an ADFS version for the OS RAM. Implement th...
by cmorley
Sun Jan 16, 2022 4:47 pm
Forum: 8-bit acorn software: other
Topic: BooBip RTool 1.05 released
Replies: 14
Views: 1963

BooBip RTool 1.05 released

JGH kindly sent me some bug fixes.

There is nothing critical in the new release just cosmetics. ROM list improved if ROM title contains non-printable characters (e.g. AMPLE).
by cmorley
Sun Jan 16, 2022 12:21 pm
Forum: 8-bit acorn software: other
Topic: Using Superior Software's Speech
Replies: 29
Views: 451

Re: Installed Superior Software's Speech.ssd and have broken my bbc

On that note does any one know how to run speech “which is machine code” then run a basic program straight after it, because soon as soon as I use speech I have no idea how to then run a basic prog? Do you mean you just get constant "Bad Program" errors? Any program which uses the languag...
by cmorley
Sun Jan 16, 2022 11:53 am
Forum: 8-bit acorn hardware
Topic: Installed Superior Software's Speech.ssd and have broken my bbc
Replies: 24
Views: 763

Re: Installed Superior Software's Speech.ssd and have broken my bbc

vanekp wrote:
Sun Jan 16, 2022 10:36 am
still don't see how the speech ROM/software caused it to die in the 1st place.
Coincidence. It is just what was running when the RAM failed.
by cmorley
Fri Jan 14, 2022 8:28 pm
Forum: general
Topic: What do you use your Beeb for
Replies: 14
Views: 541

Re: What do you use your Beeb for

Tinkering and building hardware expansions. \:D/

The Master, Master Compact and Electron I mostly use for gather dust :-
by cmorley
Wed Jan 12, 2022 1:33 pm
Forum: 8-bit acorn hardware
Topic: Installed Superior Software's Speech.ssd and have broken my bbc
Replies: 24
Views: 763

Re: Installed Superior Software's Speech.ssd and have broken my bbc

Should be one (or more) of the eight CAS0 RAM chips then. IC61 - IC68. They look like they might be socketed on your computer. Try removing and replacing them all first in case you simply have a bad connection.
by cmorley
Wed Jan 12, 2022 7:33 am
Forum: 8-bit acorn hardware
Topic: Installed Superior Software's Speech.ssd and have broken my bbc
Replies: 24
Views: 763

Re: Installed Superior Software's Speech.ssd and have broken my bbc

That looks like blocks from mode 7. That means the computer is booting far enough to set up the video mode then crashing. Could be a bad connection to memory or a memory fault. Try pushing down on all the memory chips or removing and refitting them. Swap the jumper S25 postion and see if it will boo...
by cmorley
Tue Jan 11, 2022 11:32 pm
Forum: 8-bit acorn hardware
Topic: Installed Superior Software's Speech.ssd and have broken my bbc
Replies: 24
Views: 763

Re: Installed Superior Software's Speech.ssd and have broken my bbc

Post a photo of the "blocks on the screen". If it boots far enough to set up the video timing then odds on you have a faulty RAM chip. Try pressing down or reseating all your RAM chips first.
by cmorley
Thu Dec 30, 2021 11:26 am
Forum: 8-bit acorn hardware
Topic: Non-erasing EPROM
Replies: 16
Views: 667

Re: Non-erasing EPROM

Glue doesn't make much difference in my experience... might take longer but I think the UV light scatters around quite well. If it is broken bits (and not broken internal addressing) and your target image has the same bits that need to be programmed low then you can "get away with it" as t...
by cmorley
Thu Dec 30, 2021 8:47 am
Forum: 8-bit acorn hardware
Topic: Non-erasing EPROM
Replies: 16
Views: 667

Re: Non-erasing EPROM

It sounds faulty.

I have seen stuck bits which won't erase. Also clearly faulty rows/columns within the chip which read back a sequence of n dead, n working, n dead etc. Also dead address lines and dead data lines.

Silicon heaven time.
by cmorley
Wed Dec 29, 2021 10:01 am
Forum: off-topic
Topic: LOLPRICE
Replies: 3310
Views: 490788

Re: LOLPRICE

Boydie wrote:
Wed Dec 29, 2021 9:50 am
Looking at the photos
If you feed the main photo into Google image search you get the BBC micro Wikipedia page back - seller has used the stock picture.

https://en.wikipedia.org/wiki/BBC_Micro ... stored.jpg
by cmorley
Tue Dec 28, 2021 9:55 pm
Forum: 8-bit acorn hardware
Topic: A blitter for the beeb?
Replies: 245
Views: 32623

Re: A blitter for the beeb?

I've done a simple state machine at power on to copy UFM to block RAM (congfigured as dual port) on the 10M02 to emulate ROM. The state machine outputs a not ready which is used to extend reset if necessary. Worked well & only 20-30 lines of verilog to do the whole lot.
by cmorley
Tue Dec 28, 2021 9:23 pm
Forum: off-topic
Topic: LOLPRICE
Replies: 3310
Views: 490788

Re: LOLPRICE

A £700 model B! Ohh... and lolprice £30 P&P is extra :lol:
by cmorley
Wed Dec 22, 2021 12:02 pm
Forum: 8-bit acorn hardware
Topic: X2 17.7345 polarised?
Replies: 5
Views: 191

Re: X2 17.7345 polarised?

No. Either way round is fine, they are symmetrical.
by cmorley
Wed Dec 22, 2021 9:42 am
Forum: 8-bit acorn hardware
Topic: A blitter for the beeb?
Replies: 245
Views: 32623

Re: A blitter for the beeb?

hoglet wrote:
Wed Dec 22, 2021 9:34 am
Maybe 2022 will be the year that I have a go myself with BGA packages?
I thought that about 2021 and even bought an IR pre-heater... then everything became out of stock at Mouser! #-o
by cmorley
Fri Dec 17, 2021 12:15 pm
Forum: off-topic
Topic: Modern game frustrations
Replies: 6
Views: 542

Re: Modern game frustrations

It wasn't expensive. £16 in the Steam sale for Metro 2033, Metro: Last Light & Metro Exodus. I have no problem with the price... it's the facepalm of downloading 79GB only to discover that won't even load. Then another 65GB to discover that doesn't support Crossfire! :/ My machine will run SOTR ...
by cmorley
Thu Dec 16, 2021 5:05 pm
Forum: off-topic
Topic: Modern game frustrations
Replies: 6
Views: 542

Modern game frustrations

Anyone else get that feeling... when you download 79GB of game (Metro Exodus Enhanced) and fire it up only to be greeted with a message about missing requirements... google those requirements and realise the game requires a graphics card which supports ray tracing. :/ So uninstall that and set Steam...
by cmorley
Tue Dec 14, 2021 6:53 pm
Forum: off-topic
Topic: Identifying SMD component on a MacBook mainboard
Replies: 8
Views: 324

Re: Identifying SMD component on a MacBook mainboard

My first guess would have been a Tantalum cap. If it is a Vishay part then the brief search I did, I can't find a lower case j voltage code in any of the series datasheets I looked at...
by cmorley
Sat Dec 11, 2021 5:10 pm
Forum: 32-bit acorn hardware
Topic: A3000 bad CMOS?
Replies: 2
Views: 345

Re: A3000 bad CMOS?

CMOS chip replaced and the machine is back up and running again. All fully working again after a DEL+POWER reset. I also fitted a CR2032 battery holder and a schottky diode while the PCB was out. The replacement chips all looked remarked so recylcled pulls and not new old stock but that's fine becau...

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