Search found 438 matches

by rmbrowngr
Wed Apr 03, 2019 10:22 am
Forum: 8-bit acorn software: other
Topic: Code editors for Elk and b+
Replies: 10
Views: 1032

Re: Code editors for Elk and b+

I found several references to an advance basic editor ROMs for both the Elk and Beeb. Where can I find these and which version for Elk and B+? Richard . . . I'll send you the ROM images for the Electron ABE (Advanced BASIC Editor) and the User Guide. You'll need to put them in adjacent sideways ban...
by rmbrowngr
Wed Apr 03, 2019 6:13 am
Forum: 8-bit acorn software: other
Topic: Code editors for Elk and b+
Replies: 10
Views: 1032

Code editors for Elk and b+

I found several references to an advance basic editor ROMs for both the Elk and Beeb. Where can I find these and which version for Elk and B+?

For assembly I find references to starmon and exmon. No idea which is good or bad.
by rmbrowngr
Mon Apr 01, 2019 2:46 pm
Forum: 8-bit acorn hardware
Topic: Today I found 3 Acorn computers in my loft!
Replies: 15
Views: 1649

Re: Today I found 3 Acorn computers in my loft!

You can call off the boys now, Dave :mrgreen: I'm going to work on the Electron first. Thanks to this forum I know recapping is not necessary. What is a good alternative power supply? I'm not sure I still have the original one. Didn't see it last night. I found these guys helpful to get a power sup...
by rmbrowngr
Thu Mar 28, 2019 6:18 pm
Forum: 8-bit acorn software: classic adventure games
Topic: Absolute best adventures?
Replies: 19
Views: 3027

Re: Absolute best adventures?

BTW, I vote for Twin Kingdom Valley and The Lost Crystal http://www.acornelectron.co.uk/eug/sols/epic/The_Lost_Crystal_000.html I remember a nice little adventure from Electron User, but I can’t remember what’s it called. I always wanted the Hobbit on the Electron, but I think it was never released ...
by rmbrowngr
Thu Mar 28, 2019 6:11 pm
Forum: 8-bit acorn software: classic adventure games
Topic: Absolute best adventures?
Replies: 19
Views: 3027

Re: Absolute best adventures?

Broad assumption here but it shouldn't be too hard to port to the Electron? I read on this forum that jgharston converted many text adventures to the Atom even. I might be willing to try to port some to the Electron myself. The issue is going to be memory, as the Electron doesn't have Mode 7. Most ...
by rmbrowngr
Mon Mar 25, 2019 7:17 pm
Forum: 8-bit acorn hardware
Topic: BBC B+ 64k EEPROMs and SW RAM
Replies: 22
Views: 2346

Re: BBC B+ 64k EEPROMs and SW RAM

If I dream a bit, maybe a nice comprehensive solution could be a board that plugs into the lower set of sockets, has one set of fly leads and provides SW RAM and ROM (EEPROM), a bit like the AP6 for the Electron.

Or go the whole hog with a board to include OS, Basic, DFS 2.26 and ADFS 1.3.
by rmbrowngr
Mon Mar 25, 2019 12:02 pm
Forum: 8-bit acorn hardware
Topic: BBC B+ 64k EEPROMs and SW RAM
Replies: 22
Views: 2346

Re: BBC B+ 64k EEPROMs and SW RAM

I’ve ordered multios for the B+. If this text is correct below you can get SW RAM if configured correctly. OS 2.00 - The OS from the 64K or 128K BBC Micro B+ DFS 2.26 SRAM 1.05 VIEW A3.0 The Basic Editor 1.32 Advanced Disk Toolkit 2.00 - An extended set of commands for using disks, and for manipulat...
by rmbrowngr
Mon Mar 25, 2019 11:53 am
Forum: 8-bit acorn hardware
Topic: BBC B+ 64k EEPROMs and SW RAM
Replies: 22
Views: 2346

Re: BBC B+ 64k EEPROMs and SW RAM

I’ve also found this topic viewtopic.php?t=9148
by rmbrowngr
Sun Mar 24, 2019 8:43 pm
Forum: 8-bit acorn hardware
Topic: BBC B+ 64k EEPROMs and SW RAM
Replies: 22
Views: 2346

Re: BBC B+ 64k EEPROMs and SW RAM

danielj wrote:
Sun Mar 24, 2019 8:24 am
eprom/eeprom - any of the 32x8 ones (e.g. 28C256) should be OK, but if you want to write in situ you'll have to pick up the write signal from the same place as you do with the sram.
Do you mean this?
Connect the pin 27 ezihook to a source of a write strobe (e.g. pin 24 of the 7002)
by rmbrowngr
Sun Mar 24, 2019 2:03 pm
Forum: 8-bit acorn hardware
Topic: BBC B+ 64k EEPROMs and SW RAM
Replies: 22
Views: 2346

Re: BBC B+ 64k EEPROMs and SW RAM

I’ve found these instructions as well. https://martin-jones.com/2015/01/18/sid ... o-model-b/ It looks easier, but I don’t know the advantages or disadvantages of these approaches.
by rmbrowngr
Sun Mar 24, 2019 8:16 am
Forum: 8-bit acorn hardware
Topic: BBC B+ 64k EEPROMs and SW RAM
Replies: 22
Views: 2346

BBC B+ 64k EEPROMs and SW RAM

Which EEPROM’s are compatible for BBC B+ 64k?

I’ve also read a number of solutions on on adding SW RAM including soldering a number of RAM chips together. For sure I understand some fly leads are needed. How would I add 32\64k SW RAM? What’s the definitive answer?
by rmbrowngr
Fri Mar 22, 2019 1:00 pm
Forum: 8-bit acorn hardware
Topic: BBC B+ 64K upgrades and expansions
Replies: 17
Views: 1696

Re: BBC B+ 64K upgrades and expansions

I've just posted Adding an audio jack to a master which is basically the same as when I add them to the beeb, except I hot glue them into the air vent and the adaptor is slightly different. IIRC I connect the audio channels to the SCART pins with 10K resistors, but they were suggested in a thread o...
by rmbrowngr
Fri Mar 22, 2019 11:40 am
Forum: 8-bit acorn hardware
Topic: B+ & Electron MRB Shadow RAM- What’s different?
Replies: 6
Views: 840

Re: B+ & Electron MRB Shadow RAM- What’s different?

I've been asking myself the same question. What I have come up with so far is this: - The B+ has an addressable latch called the ACCCON register. (Its in the same place as a similar latch on the Master, but has far less functionality. Basically it is just a 1-bit flag). This allows the shadow ram t...
by rmbrowngr
Fri Mar 22, 2019 11:31 am
Forum: other vintage hardware, software and languages
Topic: '80s computer geeks' pictures.....
Replies: 19
Views: 1563

Re: '80s computer geeks' pictures.....

flaxcottage wrote:
Fri Mar 22, 2019 9:51 am
I seem to remember that the Spectrum was supported a lot by Scottish schools though and the 380Z seemed to be prevalent around Oxfordshire.
My high school was in the far east (Lowestoft). Not a affluent area. Maybe Suffolk Country Council\Waveney District Council had made a deal.
by rmbrowngr
Thu Mar 21, 2019 4:12 pm
Forum: 8-bit acorn hardware
Topic: Best SD card disk drive for the beeb
Replies: 9
Views: 1206

Re: Best SD card disk drive for the beeb

You're missing the most flexible, compatible and one of the cheapest (if you DIY) - the gotek with flashfloppy firmware. https://github.com/keirf/FlashFloppy/wiki ADFS does stay at E00 on the master, but frankly it's not much cop for playing games as pretty much everything is designed to run from D...
by rmbrowngr
Thu Mar 21, 2019 4:01 pm
Forum: 8-bit acorn hardware
Topic: Best SD card disk drive for the beeb
Replies: 9
Views: 1206

Re: Best SD card disk drive for the beeb

If you want hard disk storage on a SD card then BeebSCSI is great https://www.domesday86.com/?page_id=689 . The only downside is the use of ADFS (file system) with higher PAGE (you lose some memory). And I would recommend the use of ADFS Explorer https://www.g7jjf.com/adfs_explorer.htm for managing ...
by rmbrowngr
Wed Mar 20, 2019 8:28 pm
Forum: 8-bit acorn software: classic games
Topic: Looking for a very old game
Replies: 8
Views: 926

Re: Looking for a very old game

Certainly does sound like Escape from moonbase alpha.
by rmbrowngr
Wed Mar 20, 2019 8:18 pm
Forum: general
Topic: Maybe Electron User was issuing “fake” news.
Replies: 4
Views: 749

Maybe Electron User was issuing “fake” news.

Had a good laugh at the article at the top of the page. http://www.acornelectron.co.uk/mags/eu/ ... /s-p05.jpg :lol:

And what was the proposed new Electron?
by rmbrowngr
Wed Mar 20, 2019 7:35 pm
Forum: 8-bit acorn hardware
Topic: B+ & Electron MRB Shadow RAM- What’s different?
Replies: 6
Views: 840

B+ & Electron MRB Shadow RAM- What’s different?

I came across an issue in a Basic program I was working on when using shadow RAM on the Electron with MRB. https://stardot.org.uk/forums/viewtopic.php?f=54&t=16735 Out of curiosity I ran the same code on a B+ with shadow RAM and it worked without issue. Does anyone know the difference in impleme...
by rmbrowngr
Wed Mar 20, 2019 1:00 pm
Forum: programming
Topic: Double Height Charaters issue with Electron Master Ram Board
Replies: 21
Views: 1699

Re: Double Height Charaters issue with Electron Master Ram Board

Or an alternatively is to load the program higher up in memory and use the memory between page and the start of the User BASIC's program area.
by rmbrowngr
Wed Mar 20, 2019 12:47 pm
Forum: programming
Topic: Double Height Charaters issue with Electron Master Ram Board
Replies: 21
Views: 1699

Re: Double Height Charaters issue with Electron Master Ram Board

You're completely right:- To summarise, with shadow RAM activated any software whcih directly accesses screen RAM (&3000-&7FFF) does not work but all other legally written software does. http://www.acornelectron.co.uk/mags/aab/revs/slogger/r-mrb.html My original code memory was being allocat...
by rmbrowngr
Tue Mar 19, 2019 8:29 pm
Forum: programming
Topic: Double Height Charaters issue with Electron Master Ram Board
Replies: 21
Views: 1699

Re: Double Height Charaters issue with Electron Master Ram Board

I have figured it out - the situation is not as bad as I first thought actually. I think you have discovered an obscure corner case here. The reason why the OSWORD data gets written to the screen is because it comes from the OS, which has special privileges. If you can keep any OSWORD control block...
by rmbrowngr
Tue Mar 19, 2019 8:23 pm
Forum: programming
Topic: Double Height Charaters issue with Electron Master Ram Board
Replies: 21
Views: 1699

Re: Double Height Charaters issue with Electron Master Ram Board

The Electron User review of the MRB confirms that BASIC can't make use of the extra memory. So that tallies with what we are seeing. You’re probably right : BASIC can't make use of this extra memory, except indirectly. Access is by a new Operating System Call which allows you to read or write to it...
by rmbrowngr
Tue Mar 19, 2019 1:31 pm
Forum: programming
Topic: Double Height Charaters issue with Electron Master Ram Board
Replies: 21
Views: 1699

Re: Double Height Charaters issue with Electron Master Ram Board

What actual failure do you see? I can test this myself as I have an MRB in one of my Electrons, but it would take a while to get it fired up. As the MRB has its own operating system, I am wondering whether you have discovered an obscure bug in it. Here's a program I made (just now) to demostrate th...
by rmbrowngr
Tue Mar 19, 2019 11:58 am
Forum: programming
Topic: Double Height Charaters issue with Electron Master Ram Board
Replies: 21
Views: 1699

Re: Double Height Charaters issue with Electron Master Ram Board

One possibility - I note that the original routine used character codes 128 and 129, but the other one uses 254 and 255. I'm not sure whether in shadow mode the character set is exploded (thus allowing you to redefine characters all the way down to 128). I can't figure out why this would be a probl...
by rmbrowngr
Tue Mar 19, 2019 11:55 am
Forum: programming
Topic: Double Height Charaters issue with Electron Master Ram Board
Replies: 21
Views: 1699

Re: Double Height Charaters issue with Electron Master Ram Board

I did some tests this morning with the original code (DIM ptn% 8) in BeebEM configured as a B+ with shadow RAM turned on and it worked perfectly. The same code works on the Electron with second processor and BeebEM B with second processor. I've moved the DIM statement to the beginning of the program...
by rmbrowngr
Mon Mar 18, 2019 6:00 pm
Forum: programming
Topic: Double Height Charaters issue with Electron Master Ram Board
Replies: 21
Views: 1699

Re: Double Height Charaters issue with Electron Master Ram Board

That said, I can't see a reason why the first version of the code doesn't work on the MRB. As far as I can see, it looks 100% legal (which is why it does work on a second processor). If I only have the double height characters procedure and some test code to drive it, then yes it does work with MRB...
by rmbrowngr
Mon Mar 18, 2019 3:45 pm
Forum: programming
Topic: Double Height Charaters issue with Electron Master Ram Board
Replies: 21
Views: 1699

Re: Double Height Charaters issue with Electron Master Ram Board

Isn’t that only repeatedly using the eight locations of &70 to &78? Yes. The code repeately uses location &70 to &78. According to the memory map it falls in the area reserved for the system. The previous code reserved memory by DIM ptn 8 (nine memory locations). This broken when I ...
by rmbrowngr
Mon Mar 18, 2019 2:18 pm
Forum: general
Topic: Beginner's Guide to Interfacing the BBC Microcomputer
Replies: 1
Views: 514

Beginner's Guide to Interfacing the BBC Microcomputer

I saw this interesting book https://books.google.gr/books?id=hjJdDw ... &q&f=false. I quite like to get hold of this book (or similar) electronically. It's got some fun stuff to play with. Can anyone suggest something? :-k

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