Search found 2101 matches

by Coeus
Fri Apr 16, 2021 9:46 pm
Forum: 8-bit acorn software: other
Topic: "Edit" Source Code
Replies: 19
Views: 713

Re: "Edit" Source Code

The Edit source code (source.txt) almost assembles with ADE+ - there is one error which looks like an undefined symbol: >U 84EF:A907' 1212 LDA #crFlag ; A=cr flag bit Earlier there is: 0010= 10 crFlags EQU %0010000 so it looks like it is relying on the ADE behaviour of only considering the first six...
by Coeus
Fri Apr 16, 2021 9:39 pm
Forum: 8-bit acorn software: other
Topic: Watford Electronics DDFS-1.54T write protect oddity
Replies: 3
Views: 63

Re: Watford Electronics DDFS-1.54T write protect oddity

That's interesting. In B-Em, the version of WDDFS supplied for use with Watford daughter board is 1.53. I though, though maybe mistaken, that 1.54T was for use with the Acorn 1770, i.e. I think, at some point, Watford made their own 1770 compatible with the Acorn one. There is a thread on here discu...
by Coeus
Fri Apr 16, 2021 7:46 pm
Forum: 8-bit acorn emulators
Topic: B-Em and VDFS
Replies: 9
Views: 195

Re: B-Em and VDFS

Screendumps as discussed by PM:
ss1.png
ss3.png
ss2.png
by Coeus
Fri Apr 16, 2021 7:09 pm
Forum: 8-bit acorn software: other
Topic: "Edit" Source Code
Replies: 19
Views: 713

Re: "Edit" Source Code

I'm not sure how widely this editor was known/available outside Acorn. It's a command-driven screen editor (in the style of 'vi' but completely different keystrokes - years of using E is why I still use vi for editing text nowadays!). It also had a text markup with 'dot codes', but completely diffe...
by Coeus
Fri Apr 16, 2021 6:28 pm
Forum: 8-bit acorn software: other
Topic: "Edit" Source Code
Replies: 19
Views: 713

Re: "Edit" Source Code

I've just found a disassembly and added patch done at SJ Research - files are dated July 1989, but looks like that was the date it was copied to an archive This will be a version as used on the BBC micro in sideways RAM rather than the Master. Now that is interesting. I wasn't aware of this editor ...
by Coeus
Thu Apr 15, 2021 6:01 pm
Forum: 8-bit acorn hardware
Topic: Econet widget
Replies: 4
Views: 170

Re: Econet widget

This is really exciting. I can see the PLD and microcontroller but there are some other interesting features on that board. One is what appears to be a micro SD card slot. What is that for? Will this include fileserver firmware to serve files from the SD card? Or is it just for loading firmware? And...
by Coeus
Thu Apr 15, 2021 3:00 pm
Forum: introduce yourself
Topic: Calculating Accurately between two dates
Replies: 25
Views: 410

Re: Calculating Accurately between two dates

Have a look in Beebug magazine. http://8bs.com/beebugmags.htm Last night I was browsing the Beebug magazines on that site and it is fascinating, especially the early ones when the BBC micro was just starting to be delivered. We've heard from Richard Russell from the BBC perspective and from guys wo...
by Coeus
Wed Apr 14, 2021 6:35 pm
Forum: introduce yourself
Topic: Calculating Accurately between two dates
Replies: 25
Views: 410

Re: Calculating Accurately between two dates

First convert Gregorian dates D1 and D2 ( DD/MM/YYYY) into 2 Julian numbers ,J1,J2 then subtract and obtain the difference between them gives the total number N days between D1 and D2 Then Multiple the No of days N x 84600 ( No of seconds in a day) Then using this seconds figure we can calculate as...
by Coeus
Wed Apr 14, 2021 6:22 pm
Forum: introduce yourself
Topic: Calculating Accurately between two dates
Replies: 25
Views: 410

Re: Calculating Accurately between two dates

Ok, so here is a program I came up with: 10 REPEAT 20 PROCindate("Earlier") 30 EY%=Y%:EM%=M%:ED%=D% 40 PROCindate("Later") 50 LY%=Y%:LM%=M%:LD%=D% 60 PROCdiffdate 70 PRINTY%;" years,";M%;" months, ";D%;" days." 80 UNTILFALSE 90 END 100 DEFPROCindate(...
by Coeus
Wed Apr 14, 2021 4:36 pm
Forum: introduce yourself
Topic: Calculating Accurately between two dates
Replies: 25
Views: 410

Re: Calculating Accurately between two dates

Wondering if there is an Algorithm or mathematical formula ... :roll: I am not sure what you're looking for is well-defined. For example, what is the difference between 15th Feb. 2020 and 15th Feb 2021? If you presented the answer in days, most people would say the correct answer is 366 because 202...
by Coeus
Wed Apr 14, 2021 12:07 am
Forum: 8-bit acorn software: other
Topic: ADE / ADE Plus Help
Replies: 12
Views: 1752

Re: ADE / ADE Plus Help

So, after doing a filename search of my PC, I found the following which contains the SSD with the example/companion programs:
by Coeus
Tue Apr 13, 2021 11:43 pm
Forum: 8-bit acorn software: other
Topic: ADE / ADE Plus Help
Replies: 12
Views: 1752

Re: ADE / ADE Plus Help

Did you reach any conclusions about these two assemblers. There has been the more recent thread: https://stardot.org.uk/forums/viewtopic.php?f=2&t=22234 The SSD above posted by stevei2791 does contain a pair of ROMS that do seem to work together. The file ADEplus contains what is described in th...
by Coeus
Mon Apr 12, 2021 5:56 pm
Forum: 8-bit acorn emulators
Topic: B-Em and VDFS
Replies: 9
Views: 195

Re: B-Em and VDFS

markusher wrote:
Mon Apr 12, 2021 5:08 pm
Further testing reveals something interesting. It appears not to be parsing the directory name correctly on a *DIR command.
e.g.
*DIR $.FILESERVER.X
changes only to $.Fileserver
That doesn't happen to me. What OS are you running on and do you know which version of B-Em?
by Coeus
Mon Apr 12, 2021 4:06 pm
Forum: 8-bit acorn emulators
Topic: B-Em and VDFS
Replies: 9
Views: 195

Re: B-Em and VDFS

I have create a branch that does update the length as I mentioned above: https://github.com/stardot/b-em/tree/sf/fourteen If that turns out not to be the issue then maybe the next step is for me to replicate the setup, i.e. get hold of Turbo BASIC but I'd also need the files your BASIC program is pr...
by Coeus
Mon Apr 12, 2021 3:07 pm
Forum: 8-bit acorn emulators
Topic: B-Em and VDFS
Replies: 9
Views: 195

Re: B-Em and VDFS

This is quite puzzling. There is nowhere in VDFS where a limit of 14 is applied. Each component of a filename may be up to ten characters and a path, including all directories, can be up to 256. The other slightly odd thing is that it seems to be hanging somewhere in the BASIC interpreter not in VDF...
by Coeus
Mon Apr 12, 2021 12:37 pm
Forum: 8-bit acorn emulators
Topic: B-Em and VDFS
Replies: 9
Views: 195

Re: B-Em and VDFS

That looks like a bug. I'll investigate.
by Coeus
Mon Apr 12, 2021 1:36 am
Forum: off-topic
Topic: Vaccination Tales
Replies: 35
Views: 1170

Re: Vaccination Tales

...No problems during the day other than a raging thirst, I almost cleared out the fridge making cups of tea. After I got back home by about 8pm I was feeling drowsy, so went to bed... Now that`s really interesting. I have been debating with myself whether to post my experience but I trust this gro...
by Coeus
Sat Apr 10, 2021 6:58 pm
Forum: 8-bit acorn emulators
Topic: Key scanning ($FE4F)
Replies: 6
Views: 212

Re: Key scanning ($FE4F)

Got it, thanks! I had it in mind that the scanning did the entire keyboard in one go rather than a column at a time. It seems to be emulating correctly now so I must be on the right lines at least now. Here's the comment from B-Em's keyboard emulation module: /* * The BBC micro keyboard is a fairly...
by Coeus
Thu Apr 08, 2021 2:33 pm
Forum: 8-bit acorn software: other
Topic: Various Terminal Emulators
Replies: 5
Views: 274

Re: Various Terminal Emulators

you may have seen my post on "Today I Received..." about a large selection of ROMS i was given... That certainly looks like an interesting find. ...There are a couple labelled Kermit... I don't know if you have a particularly interesting version of Kermit but the BBC Micro Kermit is open ...
by Coeus
Wed Apr 07, 2021 7:29 pm
Forum: 8-bit acorn hardware
Topic: What to build for a modern Econet interface
Replies: 26
Views: 659

Re: What to build for a modern Econet interface

I'm not sure if we were understanding each other over 2 vs 4-way handshake. AUN is doing only 2-way. You obviously have to support 4-way on the inside of the emulator. I am suggesting that things other than AUN (which we can't change), such as emulators, do a 4-way handshake of UDP packets, with op...
by Coeus
Wed Apr 07, 2021 2:39 pm
Forum: wanted
Topic: BBC B Case (top part)
Replies: 0
Views: 63

BBC B Case (top part)

You may have seen that my current BBC B is in a Solidisk metal case. BITD this seemed to make sense as it meant the disk drives were integral and looked neater than having them in a separate box. These days, though, I rarely use the discs as I have a Turbo MMC and the metal case is very heavy. Unfor...
by Coeus
Wed Apr 07, 2021 2:32 pm
Forum: 8-bit acorn hardware
Topic: What to build for a modern Econet interface
Replies: 26
Views: 659

Re: What to build for a modern Econet interface

Andew, have you seen my post on what BeebEm does? [*]Emulators could have a further configuration for the IP address (and maybe port) for a bridge process; all non-net0 traffic would be sent there How would the bridge know where to send the packet it received. If it retained the Econet addresses, as...
by Coeus
Wed Apr 07, 2021 1:42 pm
Forum: 8-bit acorn hardware
Topic: What to build for a modern Econet interface
Replies: 26
Views: 659

Re: What to build for a modern Econet interface

Not sure what the plan is on B-Em, or how the Risc emulators handle things. For B-Em, there is an experimental branch with a port of what BeebEm does. Currently the BeebEm emulator uses the one IP address and different ports to listen on, although it can be configured to use multiple IP addresses. ...
by Coeus
Tue Apr 06, 2021 4:38 pm
Forum: 8-bit acorn hardware
Topic: OS ROM.
Replies: 19
Views: 1027

Re: OS ROM.

If the board has not been modified, then the IC51 OS ROM socket is wired exactly as shown in the schematic. With IC51 pin 1 connected to the CPU A15 line and, IC51 pin 27 connected to the CPU A14 line. I am surprised, then, that some EPROMs would not work. I did, back in the day, swap my OS ROM wit...
by Coeus
Tue Apr 06, 2021 1:31 am
Forum: introduce yourself
Topic: Recently revived a BBC Model B
Replies: 6
Views: 222

Re: Recently revived a BBC Model B

https://twitter.com/paulcerrington/status/1379162771997200393 Welcome to the forum and congratulations on getting your machine going again. I was looking at one of those pictures, thinking when did MMFS start using lower case, then I noticed the BBC Computer was affected too. Then it dawned on me t...
by Coeus
Tue Apr 06, 2021 1:16 am
Forum: 8-bit acorn hardware
Topic: What to build for a modern Econet interface
Replies: 26
Views: 659

Re: What to build for a modern Econet interface

Hopefully I'll have the first boards back from assembly at the end of this week so fingers crossed there. That was in the other thread. I didn't realise you had got that far with it. What features does this have, for example DIN vs. RJ45, one socket or more, built-in clock or not etc. How does it c...
by Coeus
Tue Apr 06, 2021 1:06 am
Forum: 8-bit acorn hardware
Topic: Plipbox ethernet
Replies: 11
Views: 282

Re: Plipbox ethernet

I can add to the tally of machines I have with ISA slots:
  • A 750Mhz Athlon-based machine with one ISA slot.
  • A Pentium MMX-based machine with 32Mb RAM and 2 ISA slots
  • A Celeron 333Mhz Machine with 256Mb RAM and 2 ISA slots
by Coeus
Tue Apr 06, 2021 12:32 am
Forum: 8-bit acorn hardware
Topic: Plipbox ethernet
Replies: 11
Views: 282

Re: Plipbox ethernet

However, more demanding is that you need an SJ PC Econet card (OK, you could maybe twist my arm), and a PC to put it in with ISA slots, which probably stops you running a very modern OS anyhow. You've got me wondering now what old junk I have. I think I have an old 80386-based machine somewhere so ...
by Coeus
Mon Apr 05, 2021 10:11 pm
Forum: for sale / freebies
Topic: BeebMaster BBC B Econet Kit
Replies: 78
Views: 9755

Re: BeebMaster BBC B Econet Kit

BeebMaster wrote:
Mon Apr 05, 2021 9:11 pm
So it seems to suggest that IC87 should be fitted and the link disregarded, which in your case would have to be removed. In that case I can send you a 16-pin DIL socket.
Brilliant, thanks. If I had the 16 pin DIL socket I would just go ahead without bothering you but I don't have any.
by Coeus
Mon Apr 05, 2021 9:56 pm
Forum: 8-bit acorn hardware
Topic: What to build for a modern Econet interface
Replies: 26
Views: 659

Re: What to build for a modern Econet interface

There's also various bridging scenarios. Properly bridging Econet and AUN has long been wanted, and remains valuable now. Bridging islands of Econet with ethernet links in between was something I always wanted to do, but the need for that has probably passed - unless perhaps for islands of Econet b...

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