Search found 287 matches

by dv8
Mon Apr 06, 2020 6:52 pm
Forum: community projects
Topic: New Advanced User Guide (NAUG) [Remastered PDF]
Replies: 28
Views: 2210

Re: New Advanced User Guide (Remastered)

daveejhitchins wrote:
Mon Apr 06, 2020 5:20 pm
Not to worry, just a thought as recently I've been having a devils job to find out some information I needed - spread across several books and JGH's MDFS.NET.
Out of interest, what sort of information were you trying to find?
by dv8
Mon Apr 06, 2020 6:28 pm
Forum: programming
Topic: How are GOTO line numbers in BASIC programs stored in memory?
Replies: 3
Views: 156

Re: How are GOTO line numbers in BASIC programs stored in memory?

Line numbers are tokenised into a 4 byte value starting with the token &8D.

The process is described in detail in the BASIC ROM User Guide section 2.3.2 (page 39).
by dv8
Mon Apr 06, 2020 2:58 pm
Forum: community projects
Topic: New Advanced User Guide (NAUG) [Remastered PDF]
Replies: 28
Views: 2210

Re: New Advanced User Guide (Remastered)

Just uploaded another update to the PDF with more corrections. Download link is in the opening post Changes since revision 3 (November 2019) p31 (39) mnemonic summary : added effect comment to TRB and TSB p94 (102) TRB : added effect comment M = M AND NOT A p95 (103) TSB : added effect comment M = M...
by dv8
Thu Apr 02, 2020 9:31 pm
Forum: community projects
Topic: New Advanced User Guide (NAUG) [Remastered PDF]
Replies: 28
Views: 2210

Re: New Advanced User Guide (Remastered)

Excellent work, a superb remastering. I found one minor issue: Top of page 186 - "&366 Teletext output cursor character (&FF - default)" I think the default value is actually &7F (as set at &CB2E in the OS 1.2 ROM) Thanks. You're right, the default value is &7F (although &FF would still represent t...
by dv8
Wed Mar 18, 2020 10:30 am
Forum: programming
Topic: zero page addresses help please
Replies: 14
Views: 612

Re: zero page addresses help please

These kind of crashes are usually caused by unbalanced stack operations. Without seeing the whole subroutine, my best guess is that you are prematurely returning out of it somewhere with an RTS or JMP while the registers are still on the stack. Or perhaps there was a branch to the final RTS that wou...
by dv8
Tue Mar 17, 2020 10:10 pm
Forum: programming
Topic: zero page addresses help please
Replies: 14
Views: 612

Re: zero page addresses help please

Since your game is in assembly it's effectively taking over from the current language so the workspace from &00 through &8F is available to you. Just make sure you don't RTS out of the game. Avoid using &90-&9F, you may not be using Econet but someone running your game might be. If you still need mo...
by dv8
Tue Mar 17, 2020 4:40 pm
Forum: software: other
Topic: Beeb.MMB - Locked Discs
Replies: 6
Views: 213

Re: Beeb.MMB - Locked Discs

The DUTILS commands are all documented on the MMFS github here:

https://github.com/hoglet67/MMFS/wiki/Command-Reference
by dv8
Tue Mar 17, 2020 3:25 pm
Forum: software: other
Topic: Beeb.MMB - Locked Discs
Replies: 6
Views: 213

Re: Beeb.MMB - Locked Discs

For MMFS:

*DIN <disc>
*DOP U

For other filing systems (SuperMMC/TurboMMC/SmartSPI):

*DUNLOCK <disc>
by dv8
Mon Mar 16, 2020 8:16 pm
Forum: community projects
Topic: Advanced User Guide (Remastered)
Replies: 21
Views: 1952

Re: Advanced User Guide (Remastered)

I just found a couple of errors: Page 400, paragraph 3: "reading" should have a capital R Page 308, line 270: LDX &16 should be LDX #16 (to read the lightpen register) Thanks for the corrections. I've gone through all the listings again and fixed this along with several other problems. An updated S...
by dv8
Fri Mar 13, 2020 9:34 am
Forum: software: classic games
Topic: Who's ready for... guess that game! ;D
Replies: 82
Views: 4047

Re: Who's ready for... guess that game! ;D

chrisn wrote:
Fri Mar 13, 2020 8:54 am
Is it Demolator...?
Yes, we have a winner! =D>

And with that we've reached the end of the games left over from last time.

Should I carry on doing these challenges, or does someone else want to have a go?
by dv8
Fri Mar 13, 2020 7:20 am
Forum: software: classic games
Topic: Who's ready for... guess that game! ;D
Replies: 82
Views: 4047

Re: Who's ready for... guess that game! ;D

No guesses? Okay then, here's another clue:

guess-game.png
guess-game.png (247 Bytes) Viewed 477 times
by dv8
Thu Mar 12, 2020 8:53 am
Forum: software: classic games
Topic: Who's ready for... guess that game! ;D
Replies: 82
Views: 4047

Re: Who's ready for... guess that game! ;D

It's not Citadel.

Another clue:

guess-game.png
guess-game.png (250 Bytes) Viewed 528 times
by dv8
Wed Mar 11, 2020 9:42 am
Forum: software: classic games
Topic: Who's ready for... guess that game! ;D
Replies: 82
Views: 4047

Re: Who's ready for... guess that game! ;D

Wow, I wasn't expecting anyone to get it from the first image!

Mr. Freeze is correct, well done =D>

Right then, this is the last one, and is (probably) the hardest:

guess-game.png
guess-game.png (293 Bytes) Viewed 577 times
by dv8
Wed Mar 11, 2020 9:36 am
Forum: community projects
Topic: Enigma Disc Imager User Guide (Remastered PDF)
Replies: 3
Views: 230

Re: Enigma Disc Imager User Guide (Remastered PDF)

I was able to find some text from a later edition of this manual and have updated the PDF accordingly.

Download link is in the first post.
by dv8
Tue Mar 10, 2020 2:05 pm
Forum: software: classic games
Topic: Who's ready for... guess that game! ;D
Replies: 82
Views: 4047

Re: Who's ready for... guess that game! ;D

It was indeed Uncle Claude =D>

This next one is probably a bit trickier:

guess-game.png
guess-game.png (225 Bytes) Viewed 625 times
by dv8
Mon Mar 09, 2020 7:52 pm
Forum: hardware
Topic: What ports are you using (and how)?
Replies: 18
Views: 593

Re: What ports are you using (and how)?

Different things in various machines. Internal Tube — all Masters have an internal Pi Zero copro. External Tube — a single Pi 3B shared between machines. 1MHz Bus — an internal DataCentre in one Master, an external IDE CF drive shared between the others. User Port — can be any of: cheapo SD card rea...
by dv8
Mon Mar 09, 2020 7:22 pm
Forum: software: classic games
Topic: Who's ready for... guess that game! ;D
Replies: 82
Views: 4047

Re: Who's ready for... guess that game! ;D

No, it's not Bubble Bobble.

Here's another clue:

guess_game.png
guess_game.png (973 Bytes) Viewed 706 times
by dv8
Sun Mar 08, 2020 10:42 am
Forum: software: classic games
Topic: Who's ready for... guess that game! ;D
Replies: 82
Views: 4047

Re: Who's ready for... guess that game! ;D

Yes, it was Rubble Trouble =D>

I thought it would take longer for someone to get it!

Let's raise the bar a bit then, which game is this from:

guess_game.png
guess_game.png (244 Bytes) Viewed 257 times
by dv8
Sun Mar 08, 2020 10:30 am
Forum: other vintage computer hardware, software and games
Topic: Economatics Smartbox SB-04
Replies: 79
Views: 1518

Re: Economatics Smartbox SB-04

I have had a go at disassembling the ROM just now, but I have struggled to extract very much valid code from it so far. There is a little bit, but it seems to have a lot of undefined instructions mixed up in it. It's probably using the extra instructions supported by the 65C02. Try adding 'cpu 65c0...
by dv8
Sat Mar 07, 2020 2:43 pm
Forum: software: classic games
Topic: Who's ready for... guess that game! ;D
Replies: 82
Views: 4047

Re: Who's ready for... guess that game! ;D

Okay, the last one was obviously way too easy so here's something a little more challenging. Name the game: 10 ENVELOPE1,1,0,0,0,0,0,0,126,-4,0,-1,126,100 20 ENVELOPE2,1,0,0,0,0,0,0,60,10,0,-60,60,120 30 SOUND &201,1,61,16 : SOUND &202,2,45,16 : SOUND &203,2,33,16 40 SOUND &201,1,61,16 : SOUND &202,...
by dv8
Fri Mar 06, 2020 4:51 pm
Forum: software: classic games
Topic: Who's ready for... guess that game! ;D
Replies: 82
Views: 4047

Re: Who's ready for... guess that game! ;D

Correct, it was Frak! =D> As a prize here are the other tunes from the game. Make these changes to the listing in the previous post ... End of game: 80 DATA 68,69,82,80,84,89,80,70,65,60,68,60,81,64,69,55,231 For the in-game tunes add these lines: 15 RESTORE 75 GOTO 15 then, Tune 1: 80 DATA 33,33,41...
by dv8
Fri Mar 06, 2020 3:16 pm
Forum: software: classic games
Topic: Who's ready for... guess that game! ;D
Replies: 82
Views: 4047

Re: Who's ready for... guess that game! ;D

Thought I'd try resurrecting this thread after finding a few games left over from last time. For starters, here's a really easy one. Which game is this tune from? 10 ENVELOPE 1,1,0,0,0,1,1,1,126,-10,-2,-4,126,60 20 REPEAT 30 READ N% 40 P%=N% AND &7C 50 D%=((N% AND 3)+1)*2 60 SOUND 1,1,P%,D% 70 UNTIL...
by dv8
Thu Mar 05, 2020 8:01 pm
Forum: community projects
Topic: Enigma Disc Imager User Guide (Remastered PDF)
Replies: 3
Views: 230

Enigma Disc Imager User Guide (Remastered PDF)

Attached is a remastered PDF of the user guide for Enigma Disc Imager by Altra Roms. The included zip file contains versions 1.07 and 1.09 of the Enigma ROM. Both versions have been patched so they can be run from a sideways RAM bank. The PDF only covers version 1.07. As far as I can tell, version 1...
by dv8
Sat Feb 29, 2020 9:15 pm
Forum: software: other
Topic: PLAY command — An alternative to SOUND for creating music and sfx
Replies: 9
Views: 1036

Re: PLAY command — An alternative to SOUND for creating music and sfx

Updated to version 1.03 Download links are in the opening post . This release contains lots of new commands, some extra demo tunes and updated documentation with several additional tutorial sections. The main new feature is that SOUND data can now be captured from PLAY sequences and played back inde...
by dv8
Sat Feb 29, 2020 12:37 pm
Forum: hardware
Topic: Finally getting an Electron
Replies: 18
Views: 601

Re: Finally getting an Electron

I will need a modern mass storage solution of some sort - e.g. an SD card reader. I will also need a co-processor and ideally some way to run ROMs - either by cartridge or sideways RAM etc. A Plus 1 with an AP5 will cover all your requirements in a single cartridge (user port for SD card reader, Tu...
by dv8
Thu Feb 27, 2020 9:40 am
Forum: community projects
Topic: Computer Concepts Graphics ROM User Guide (Remastered PDF)
Replies: 4
Views: 429

Re: Computer Concepts Graphics ROM User Guide (Remastered PDF)

that is very good scanning. Thanks! Out of interest which is the best graphics ROM for the BBC? I think there are three altogether? (and a number of cassette based packages) Out of the two graphics ROMs Acorn GXR is by far the more polished product and has the advantage of being built in to the Mas...
by dv8
Thu Feb 27, 2020 8:53 am
Forum: general
Topic: Today I received.....
Replies: 5714
Views: 492644

Re: Today I received.....

Leew wrote:
Wed Feb 26, 2020 5:09 pm
Don't have the faintest idea how to program in Lisp and there isn't a manual, instead it says go out and buy the BBC manual for Lisp on the box :-( No doubt I will find it on the web somewhere but it's always nice to have the original paper books.
A PDF of the LISP manual is available here
by dv8
Wed Jan 29, 2020 9:41 am
Forum: community projects
Topic: Computer Concepts Graphics ROM User Guide (Remastered PDF)
Replies: 4
Views: 429

Computer Concepts Graphics ROM User Guide (Remastered PDF)

Attached is a remastered PDF of the Computer Concepts Graphics ROM user guide. The zip file contains version 2.09 of the Graphics ROM. The SSD disc image contains the listings from the manual and a copy of the ROM. Computer_Concepts_Graphics_ROM.pdf Computer_Concepts_Graphics_ROM.ssd Computer_Concep...
by dv8
Mon Jan 27, 2020 10:00 am
Forum: community projects
Topic: Acorn Graphics Extension ROM (GXR) User Guide
Replies: 22
Views: 2066

Re: Acorn Graphics Extension ROM (GXR) User Guide

Also, the graphics extension ROMs default to disabled or enabled depending on if the ROM slot they are in is odd or even. Try swapping the GXR ROM with the one adjacent to it. That's true for the Acorn GXR. For the CC Graphics ROM, versions 1.xx are enabled by default, versions 2.xx are disabled. T...
by dv8
Mon Jan 27, 2020 12:10 am
Forum: community projects
Topic: Acorn Graphics Extension ROM (GXR) User Guide
Replies: 22
Views: 2066

Re: Acorn Graphics Extension ROM (GXR) User Guide

elkrepair wrote:
Sun Jan 26, 2020 11:49 pm
I can't find a manual for it though. Does anyone know of a link please?
I couldn't find one either so I've scanned my copy of it and am currently putting together a remastered PDF.