Search found 42 matches

by dv8
Fri Sep 15, 2017 3:19 pm
Forum: community projects
Topic: Books: BBC BASIC & Introducing BBC BASIC
Replies: 6
Views: 164

Re: Books: BBC BASIC & Introducing BBC BASIC

Well done and, please, keep up the good work Thanks! Several other books are already in production and will be posted soon :-) You must have an abundance of patience It's not as bad as I probably made it sound! Usually I just work on them a bit at a time while watching TV or listening to podcasts. ...
by dv8
Fri Sep 15, 2017 2:54 pm
Forum: community projects
Topic: Book: Assembly Language Programming for the BBC Micro
Replies: 10
Views: 338

Re: Book: Assembly Language Programming for the BBC Micro

Thanks all for the kind words. It's good to know the effort is appreciated :-) Nice job with some old school tools (I use psp for all my image editing, have done since its release!) PSP has been my go to image editor for ages too. Sometimes these older lightweight tools can be more productive than t...
by dv8
Thu Sep 14, 2017 12:09 am
Forum: community projects
Topic: Books: BBC BASIC & Introducing BBC BASIC
Replies: 6
Views: 164

Re: Books: BBC BASIC & Introducing BBC BASIC

lurkio wrote:Which OCR program did you use?

Nuance OmniPage.

The whole sordid story of how these books are created is in the Assembly Language Programming book thread.
by dv8
Wed Sep 13, 2017 11:56 pm
Forum: community projects
Topic: Book: Assembly Language Programming for the BBC Micro
Replies: 10
Views: 338

Re: Book: Assembly Language Programming for the BBC Micro

Just wondering what you use to get these results? It's a variety of (mostly commercial) software, plus a fair amount of effort :-) Effectively, the book has been recreated in a DTP application. Regarding your scanning project, to turn the images into text you will need some form of OCR software. Wa...
by dv8
Wed Sep 13, 2017 12:02 pm
Forum: community projects
Topic: Books: BBC BASIC & Introducing BBC BASIC
Replies: 6
Views: 164

Re: Books: BBC BASIC & Introducing BBC BASIC

Thanks!

Yes, I scanned them in. Then they were put through OCR and re-created in a DTP package.
by dv8
Wed Sep 13, 2017 10:02 am
Forum: community projects
Topic: Book: Assembly Language Programming for the BBC Micro
Replies: 10
Views: 338

Book: Assembly Language Programming for the BBC Micro

Here is a scanned, OCRed and fully re-typeset copy of Assembly Language Programming for the BBC Microcomputer (2nd ed.) by Ian Birnbaum. Also included are SSD images containing all the listings in the book, answers to the exercises, and bonus utility programs that were originally supplied on an acco...
by dv8
Wed Sep 13, 2017 9:47 am
Forum: community projects
Topic: Books: BBC BASIC & Introducing BBC BASIC
Replies: 6
Views: 164

Books: BBC BASIC & Introducing BBC BASIC

Attached are two programming books: BBC BASIC and Introducing BBC BASIC , both by R.B. Coats. 'Introducing' is pretty much a cut-down version of the larger book. It does, however, have some extra content in the chapters on graphics, sound and procedures. It also includes an additional set of questio...
by dv8
Sun Aug 27, 2017 2:13 pm
Forum: archive requests
Topic: Missing Adventure games
Replies: 82
Views: 4398

Re: Missing Adventure games

Here is another missing adventure, located by iamaran in the "Computer & Video Games Book Of Adventure" from Melbourne House. Could someone have a go at OCRing it... [-o< Here you go, OCRed and fixed. ...and, if anyone is interested, the solution: ( TAKE ROPE, PULL PAPER, GO DOOR, TAK...
by dv8
Sat Nov 05, 2016 3:44 pm
Forum: archive requests
Topic: Missing Adventure games
Replies: 82
Views: 4398

Re: Missing Adventure games

Here is Escape from Input Magazine.
by dv8
Sat Apr 30, 2016 2:32 pm
Forum: hardware
Topic: Converting ABR and ATI for EEPROM (28C256)
Replies: 53
Views: 2530

Re: Converting ABR and ATI for EEPROM (28C256)

CMcDougall wrote:Bad news, machine/s now just crash on break & power up...

That happens when the EEPROM isn't write protected.
Is there a switch or jumper setting on the board to disable writes?
by dv8
Sat Apr 30, 2016 8:13 am
Forum: hardware
Topic: Converting ABR and ATI for EEPROM (28C256)
Replies: 53
Views: 2530

Re: Converting ABR and ATI for EEPROM (28C256)

Colin,

The command to unlock the EEPROM should be

EEP32 UNLOCK 23
by dv8
Sun Nov 15, 2015 11:33 am
Forum: hardware
Topic: EEPROM - the Holy Grail of Sideways Rom?
Replies: 312
Views: 23209

Re: EEPROM - the Holy Grail of Sideways Rom?

However, I then tried to put FORTH on one of the other EEPROMs (ROM B) and now the BBC always boots straight into FORTH (which I don't know how to use yet) and I can't seem to get it to return to BASIC. To stop this from happening, make sure that the BASIC ROM is in a socket to the right of the FOR...
by dv8
Tue Nov 10, 2015 3:51 pm
Forum: archive submissions
Topic: 30th Anniversary BBC and Electron Collection
Replies: 348
Views: 24992

Re: 30th Anniversary BBC and Electron Collection

Michael Brown wrote:is there a command to turn off all the unnecessary chips in a datacentre BBC?

*DTRAP disables all ROMs except BASIC and RamFS.
by dv8
Mon Nov 09, 2015 9:53 pm
Forum: hardware
Topic: EEPROM - the Holy Grail of Sideways Rom?
Replies: 312
Views: 23209

Re: EEPROM - the Holy Grail of Sideways Rom?

I didn't realise you were answering Mat's specific thoughts, it sounded like you were offering eproms as a general alternative to eeproms which does defeat the purpose of the thread somewhat :P Heh, yeah, I can see how it looks that way :lol: . Could have done with quoting the original question #-o...
by dv8
Mon Nov 09, 2015 8:38 pm
Forum: hardware
Topic: EEPROM - the Holy Grail of Sideways Rom?
Replies: 312
Views: 23209

Re: EEPROM - the Holy Grail of Sideways Rom?

Lol, unless I'm missing something, the whole point of my eeprom exercise was about enabling flexible, in-situ, non-volatile device programming that doesn't need a bespoke programmer... No? :shock: :-k :wink: All true, of course, and I'm a fan of using flash ROMs myself too. My point was that if Mat...
by dv8
Mon Nov 09, 2015 5:47 pm
Forum: hardware
Topic: EEPROM - the Holy Grail of Sideways Rom?
Replies: 312
Views: 23209

Re: EEPROM - the Holy Grail of Sideways Rom?

If you don't need to reprogram in situ, consider using a standard EPROM instead. A 27128 (16K), 27256 (32K) or 27512 (64K) will just drop in without needing any modifications. If you really need the ROM to be electrically erasable, a couple of good alternatives are the AT29C256 or W27C512. Again, th...
by dv8
Mon Nov 09, 2015 2:37 pm
Forum: software: other
Topic: DFS ROM source code
Replies: 19
Views: 2061

Re: DFS ROM source code

MMFS seems to be working okay in its current state.

I tried it with the STH games menu and didn't see any problems.

If anyone else wants to give it a go, I've attached the ROM images here. There are separate versions for Model B, Master and SWRAM.

Paul.
by dv8
Thu Nov 05, 2015 12:30 am
Forum: archive submissions
Topic: 30th Anniversary BBC and Electron Collection
Replies: 348
Views: 24992

Re: 30th Anniversary BBC and Electron Collection

There was a newer release of Sparse Invaders than the one on disc 103. It fixed a lot of problems with the original version, including the dodgy sound.

Since the Retro Software site is still down, I've uploaded a copy here.

—Paul.
by dv8
Thu Mar 31, 2011 8:30 pm
Forum: hardware
Topic: Turbo MMC wont load games from the menu system
Replies: 4
Views: 1080

Re: Turbo MMC wont load games from the menu system

Try removing the Speech! ROM.
I had this same problem with the MMC menu and that fixed it.
by dv8
Sat Jan 08, 2011 11:46 pm
Forum: software: other
Topic: Tape turbo-loader
Replies: 7
Views: 949

Re: Tape turbo-loader

Rich, Just tried this on my beeb and it's working perfectly. As Martin discovered, there is a problem with the UEF files though. They seem to be missing the usual inter-block carrier tone at the start. It just launches straight into the first data block. The files work in BeebEm but a real beeb igno...
by dv8
Sat Jan 08, 2011 12:54 pm
Forum: software: other
Topic: Glitchy sprite printing routine
Replies: 2
Views: 505

Re: Glitchy sprite printing routine

In the third line from the bottom, 24 is added to the sprite pointer at &72 but &73 isn't updated if that addition overflows. Adding this extra bit of code will fix it: LDA &72:ADC #24:STA &72:BCC P%+4:INC &73 BCC P%+4 is a quick way to skip over the INC instruction without havin...
by dv8
Thu Jan 06, 2011 12:24 pm
Forum: software: classic games
Topic: Hyper Viper (was: Let's hear it for our ...)
Replies: 29
Views: 3290

Re: Let's hear it for our great leader Arcadian

The music sounds like it's using an amplitude envelope to decay the volume of the notes which isn't supported on the Electron. This will be what's making all the notes blend in to one another. I had a similar issue with the Treasure Island tune. The solution is to add a short duration of silence bet...
by dv8
Mon Jul 05, 2010 12:52 pm
Forum: hardware
Topic: RGB SCART : MODE 7 'flickers', others don't?
Replies: 7
Views: 791

Re: RGB SCART : MODE 7 'flickers', others don't?

VDU 23,0,8,&90;0;0;0,23,0,9,9;0;0;0

turns interlace off and sets the character height to 9 lines.

VDU 23,0,10,&69;0;0;0

to get a flashing underscore style cursor in this mode.
by dv8
Wed Jun 30, 2010 10:24 am
Forum: coordination of magazine scanning projects
Topic: Input magazine
Replies: 11
Views: 4503

Re: Input magazine

The full set of PDFs are now available here
by dv8
Sun Jun 20, 2010 9:58 am
Forum: coordination of magazine scanning projects
Topic: Input magazine
Replies: 11
Views: 4503

Re: Input magazine

Thanks Matt, It's good to know the effort is appreciated :) I agreee the Alt+Tab thing is a pain. Did you know that the PDFs have an OCR text layer? It's not perfect, but it's a good starting point. What I usually do with listings is copy+paste them from the PDF into a text editor, make any correcti...
by dv8
Thu Jun 17, 2010 10:48 am
Forum: coordination of magazine scanning projects
Topic: Input magazine
Replies: 11
Views: 4503

Re: Input magazine

A quick update: The magazine scans were completed a few months ago. I recently got enough spare time to go though the scans, tidying them up and putting together PDF editions. The first two volumes (issues 1 thru 26) are now available as 200 DPI PDFs from Bombjack (one of the best Commodore document...
by dv8
Sun Jan 03, 2010 3:18 pm
Forum: hardware
Topic: BeebSID
Replies: 916
Views: 73326

Re: BeebSID

Just seen this pair of SIDs on eBay http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=290387537570 Start price £15 each. A bit steep, but around the current going rate (unless you can snag a cheapo busted C64 with a good SID). The high start price may put people off bidding so it could be wor...
by dv8
Sun Jan 03, 2010 12:18 pm
Forum: hardware
Topic: BeebSID
Replies: 916
Views: 73326

Re: BeebSID

TED is an all-in-one video, sound, i/o, memory management chip. It's graphics are pretty good but it's sound sucks, just a basic 2 channel square-wave tone generator. And it's prone to failure... a lot! So yeah, not that much different from the Electron's ULA :lol: Edit: oops! didn't see that Tom ha...
by dv8
Sun Jan 03, 2010 11:55 am
Forum: hardware
Topic: BeebSID
Replies: 916
Views: 73326

Re: BeebSID

This guy sometimes has 6581 SIDs in stock (not at the moment though): http://www.arcadecomponents.com/cpusupport.html How about this as a plug-in compatible SID replacement? http://www.swinkels.tvtom.pl/swinsid/ Also, does a Plus/4 have a SID? I've got one of those laying around somewhere I could ca...
by dv8
Sat Dec 19, 2009 11:26 pm
Forum: coordination of magazine scanning projects
Topic: Input magazine
Replies: 11
Views: 4503

Re: Input magazine

I'm definitely going to do disk images of the Beeb and Commodore listings. These will be done first because they are the machines I'm most familiar with. Hopefully I'll be able to do disks/tapes for the Speccy and Dragon too. It will be a good way of learning more about those machines. At the very l...

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