Search found 318 matches

by dv8
Wed Jul 29, 2020 11:06 pm
Forum: miscellaneous new bbc and electron games
Topic: New RPG for BBC model B
Replies: 22
Views: 501

Re: New RPG for BBC model B

I suspect that, even if the game appears to run on a Master, it won't run properly unless the layout of the Master's low memory map is compatible with a BBC B. As an example, the game uses the top 12 bytes of the 16 byte colour mapping table to store monster positions in combat, relying on the fact...
by dv8
Wed Jul 29, 2020 3:13 pm
Forum: miscellaneous new bbc and electron games
Topic: New RPG for BBC model B
Replies: 22
Views: 501

Re: New RPG for BBC model B

The game can be coerced into running on a Master (albeit with some graphical corruption) by loading it with these commands: ?&860=13 PAGE=&1900 CHAIN":2.DL1" The ?&860=13 command is a work-around for a bug at line 20800 that causes the disc title error: =LEFT$($&851,?&850) should be: ?(&851+?&850)=1...
by dv8
Mon Jul 27, 2020 8:07 pm
Forum: archive submissions
Topic: AMX Mouse Software
Replies: 56
Views: 4835

Re: AMX Mouse Software

Yrrah2 wrote:
Mon Jul 27, 2020 11:10 am
But when I started the XAM ssd disc it asks for the system disc.
Which one is that?
The system disc is the XAM disc, but it's failing a check on the disc title.

If you re-title the disc with 4 characters before the AMX XAM it works, e.g.

*TITLE "----AMX XAM"
by dv8
Thu Jul 16, 2020 8:15 pm
Forum: 8-bit acorn software: classic games
Topic: Who's ready for... guess that game! ;D
Replies: 113
Views: 7253

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

Winner, winner, chicken roast Duck! dinner =D>

Well done. I was starting to think nobody would get this one.
by dv8
Thu Jul 16, 2020 9:43 am
Forum: 8-bit acorn software: classic games
Topic: Who's ready for... guess that game! ;D
Replies: 113
Views: 7253

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

Hmm, this must be more difficult than I thought it was.
So let's try a graphic clue:

guess_game.png
guess_game.png (227 Bytes) Viewed 350 times
by dv8
Wed Jul 15, 2020 9:08 am
Forum: 8-bit acorn software: classic games
Topic: Who's ready for... guess that game! ;D
Replies: 113
Views: 7253

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

The final sound effect clue:

ENVELOPE 4,3,0,0,60,0,0,255,127,0,0,0,126,126
SOUND 3,4,0,-1

Play in jsBeeb
by dv8
Tue Jul 14, 2020 9:52 am
Forum: 8-bit acorn software: classic games
Topic: Who's ready for... guess that game! ;D
Replies: 113
Views: 7253

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

The next clue:

ENVELOPE 3,1,0,0,122,0,0,255,127,0,0,0,126,126
SOUND 2,3,0,-1

Play in jsBeeb

Press Escape to stop the sound.
by dv8
Mon Jul 13, 2020 9:07 am
Forum: 8-bit acorn software: classic games
Topic: Who's ready for... guess that game! ;D
Replies: 113
Views: 7253

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

Here's another clue:

ENVELOPE 1,129,1,255,255,11,50,104,127,0,0,255,126,0
SOUND 1,1,156,12

Play in jsBeeb
by dv8
Sun Jul 12, 2020 3:54 pm
Forum: programming
Topic: About BBC Basic 4
Replies: 110
Views: 3105

Re: About BBC Basic 4

In VDU 5 mode the background colour will be drawn for a delete character, VDU 127: 10 MODE 4 20 VDU 5 30 GCOL0,0:GCOL0,129 40 MOVE 100,100 50 VDU 9,9,9,9,127,127,127,127 60 PRINT "TEST" 70 VDU 4 This can be improved by changing MOVE to point to the right of the text: 40 MOVE 228,100 50 VDU 127,127,1...
by dv8
Sun Jul 12, 2020 9:31 am
Forum: 8-bit acorn software: classic games
Topic: Who's ready for... guess that game! ;D
Replies: 113
Views: 7253

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

Jet Boat is the correct answer. =D>
I must be making these too easy!

Okay then, another audio one:

Which game is this ear-piercingly shrill sound effect from?

ENVELOPE 2,2,253,0,0,7,0,0,127,0,0,0,110,0
SOUND 2,2,250,-1

Play in jsBeeb

Press Escape to stop the pain!
by dv8
Sat Jul 11, 2020 12:12 pm
Forum: 8-bit acorn software: classic games
Topic: Who's ready for... guess that game! ;D
Replies: 113
Views: 7253

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

It's time for another round of Guess That Game!
Let's start with this one...

guess_game.png
guess_game.png (392 Bytes) Viewed 735 times
by dv8
Thu Jul 09, 2020 11:23 pm
Forum: general
Topic: Ideas please for BBC Micro splash screen
Replies: 55
Views: 3068

Re: Ideas please for BBC Micro splash screen

I am looking to create a menu system for my Econet; the Acorn teletext image would be great as part of my loader. Could anyone point me into the graphics character strings for the acorn image shown in this thread? The following listing will generate the acorn graphic. Each □ in the listing represen...
by dv8
Thu Jul 09, 2020 4:25 pm
Forum: scanning of books, magazines, ads and letters
Topic: Advanced User Guide (Remastered)
Replies: 26
Views: 3740

Re: Advanced User Guide (Remastered)

If you have the masters in non-PDF format, would there be a chance you could export them for kindle/ebook? If not, I haven't tried the Amazon conversion yet, not trying to upgrade my ancient Kindle. Unfortunately, it's not possible to export these guides in ebook formats. It could be worth trying t...
by dv8
Thu Jul 09, 2020 3:27 pm
Forum: programming
Topic: About BBC Basic 4
Replies: 110
Views: 3105

Re: About BBC Basic 4

drfloyd wrote:
Thu Jul 09, 2020 3:09 pm
the programm do not detect when I press the cursor keys
At the start of your program put:

*FX4,1

to make the arrow keys return codes 136-139.

Also, it would be easier to use GET instead of GET$:

REPEAT : A=GET : UNTIL A>=136 AND A<=139
by dv8
Wed Jul 08, 2020 8:55 am
Forum: programming
Topic: About BBC Basic 4
Replies: 110
Views: 3105

Re: About BBC Basic 4

drfloyd wrote:
Wed Jul 08, 2020 8:43 am
i have tried to draw circles with PLOT, without succes (lost in translation on the doc), is it possible ?
To draw a circle outline:

MOVE x,y : PLOT 145,r,0

To draw a filled circle:

MOVE x,y : PLOT 153,r,0

where x,y is the centre of the circle and r is the radius.
by dv8
Mon Jul 06, 2020 9:58 am
Forum: 8-bit acorn hardware
Topic: BBC Master and Watford DDFS
Replies: 8
Views: 252

Re: BBC Master and Watford DDFS

I have ADT ROM in my BBC master and in my multi OS ROM I have DFS. I want to use Watford DDFS. So I *SRLOAD Watford DDFS, do *ROMS and there it is. You also need to do a Ctrl+Break after loading the ROM to initialise it. So I do *HELP ADT and it show *UNPLUG, but when I type *UNPLUG DFS, I get bad ...
by dv8
Mon Jun 29, 2020 12:21 pm
Forum: software & utilities for the pc, mac or unix
Topic: MMBExplorer released!
Replies: 25
Views: 1361

Re: MMBExplorer released!

Minor point. Running on a Windows 10 x64 system, some of the disk images are not showing the correct directories: That's interesting. Which language settings are you using on Windows? It looks to me like it's translating regular ASCII characters to a different code table. It's printing high-ASCII c...
by dv8
Fri Jun 12, 2020 7:26 pm
Forum: 8-bit acorn software: other
Topic: Co-processor Menu
Replies: 9
Views: 727

Re: Co-processor Menu

Here's the first release, if anyone can help with the reboot issue I'm calling JMP (&FFFC) on the host, but it only seems to work with no co-processor active. You need to reset both the parasite and the host. The following code will reset the parasite and then do a fake power-on reset of the host: ...
by dv8
Wed Jun 10, 2020 8:35 pm
Forum: programming
Topic: Events and interrupts from ROM
Replies: 19
Views: 745

Re: Events and interrupts from ROM

I've not quite worked out how the MOS does it which seems to work by repeated table look ups and then the interchannel detune which will be fun to work out! I'm not sure how helpful this will be but a while back I wrote a Python script to calculate the generated sound frequencies. It may be a usefu...
by dv8
Sun Jun 07, 2020 4:01 pm
Forum: scanning of books, magazines, ads and letters
Topic: BBC Micro User Guide [Remastered PDF]
Replies: 15
Views: 3239

Re: BBC Micro User Guide [Remastered PDF]

Updated versions of both user guides have been added to the top post . BBC B User Guide - Changes since revision 3 (August 2019) p181 (183) : renumbered octaves so the five complete octaves are numbered 1-5 p181 (183) : extended note names into treble stave p187 (189) H parameter : only amplitude an...
by dv8
Sun Jun 07, 2020 12:26 pm
Forum: scanning of books, magazines, ads and letters
Topic: Advanced User Guide (Remastered)
Replies: 26
Views: 3740

Re: Advanced User Guide (Remastered)

tom_seddon wrote:
Sun Jun 07, 2020 12:49 am
It's not exactly a huge problem, but the table in section 19.1.7 has a column marked "Bjt5" rather than "Bit5".
Thanks, this will be fixed in the next release.

All corrections are welcome, no matter how small, including OCR errors like this.
by dv8
Sun Jun 07, 2020 12:03 pm
Forum: programming
Topic: Events and interrupts from ROM
Replies: 19
Views: 745

Re: Events and interrupts from ROM

An alternative to extended vectors would be to allocate a page of workspace in response to service call 2 and install a stub routine in that memory. The stub will page in your ROM, call the service routine, page the original ROM back in and then jump to the original vector address. Because it's loca...
by dv8
Fri May 29, 2020 3:35 pm
Forum: scanning of books, magazines, ads and letters
Topic: Acorn Graphics Extension ROM (GXR) User Guide [Remastered PDF]
Replies: 26
Views: 3362

Re: Acorn Graphics Extension ROM (GXR) User Guide [Remastered PDF]

I've uploaded a new zip file (containing ROMs and disc images) to the top post . (The PDFs have not been updated). Changes: added both Model B and B+ versions of the GXR. disc images now also include these ROM files. sprite programs split off onto their own disc image. sprite disc image includes Mas...
by dv8
Sun May 24, 2020 3:27 pm
Forum: programming
Topic: Shadow RAM question
Replies: 11
Views: 466

Re: Shadow RAM question

When in a shadow mode (133 in my case), how do you write to screen memory? I know I can draw to screen with BASIC graphics commands and whatnot, but I'm trying to draw sprites. I can't find a good guide or reference on using shadow memory. Shadow RAM can be mapped into the &3000-&7FFF address space...
by dv8
Sun May 24, 2020 2:24 pm
Forum: programming
Topic: Disable vertical scrolling
Replies: 3
Views: 201

Re: Disable vertical scrolling

On the Master this can be done with: VDU 23,16,1,255| The only system legal way to do it on a standard Beeb is to use VDU 5 to print the bottom-right character at the graphics cursor. e.g. in MODE 1 or 4: VDU 5:MOVE 1248,31:VDU character ,4 If you don't mind being a bit naughty the following poke wi...
by dv8
Wed May 20, 2020 4:18 pm
Forum: the complete BBC games archive
Topic: Bug in The Golden Figurine
Replies: 40
Views: 2071

Re: Bug in The Golden Figurine

I presume that the *FX211, 0 (which also appears in the tape loader, immediately prior to the *FX212,3) is the reason that it's sound channel zero that gets filled up and hence it's the SOUND0 statement that eventually causes the game to hang? Exactly. The loader calls *FX211,0 (channel 0), *FX212,...
by dv8
Wed May 20, 2020 12:34 pm
Forum: the complete BBC games archive
Topic: Bug in The Golden Figurine
Replies: 40
Views: 2071

Re: Bug in The Golden Figurine

I think I know the cause of the bug that makes some versions of the game crash in BeebEm near the skull/wall: if you change a *FX command in the loader program from *FX212,3 to *FX212,216 then everything works! Why does this fix seem to work? I really don't know... The lower 3 bits of the *FX212 va...
by dv8
Mon May 11, 2020 4:17 pm
Forum: 8-bit acorn hardware
Topic: Master 128 ROM Mapping
Replies: 5
Views: 379

Re: Master 128 ROM Mapping

It can be done relatively easily by replicating what the cartridges do using a pair of 74LS139 (or 74HCT139) to generate the appropriate CS / OE / WE signals for each 32K socket. If you only want to use ROMs (and therefore don't need write access) it can probably be simplified with a single logic ch...
by dv8
Fri Apr 24, 2020 2:31 pm
Forum: 8-bit acorn hardware
Topic: BBC Master with Gotek disc light comes on and doesn't list
Replies: 5
Views: 370

Re: BBC Master with Gotek disc light comes on and doesn't list

Just bought a Gotek drive for the BBC Master, and plugged it in and switched on no problem, the issue is when i try to list the contents of the drive the light just comes on and stays on and just hangs there waiting for something?, any ideas?. The Gotek may be configured as drive 1. Try entering th...
by dv8
Fri Apr 17, 2020 2:29 pm
Forum: software & utilities for the pc, mac or unix
Topic: XFER unable to send SSD images - fixed
Replies: 11
Views: 1692

Re: XFER unable to send SSD images - fixed

I've found that having the Acornsoft Graphics Extension ROM plugged in stops XFER 5.1 from running correctly. The reason is that with the GXR's resources loaded into RAM, there is not enough available RAM for XFER to run. The GXR can be disabled (and the workspace reclaimed) by issuing the command ...

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