Search found 623 matches

by geraldholdsworth
Fri May 22, 2020 5:17 pm
Forum: general
Topic: Defects on ADFS floppies
Replies: 4
Views: 205

Re: Defects on ADFS floppies

Could the defects even be part of some fancy copy protection? ("Attempt to read sector x; if it succeeds, then this isn't a legit copy" -- I've heard of stuff like this being done on Amiga games or similar.) EGO: Repton 4 on the Archimedes (and later on, the new version of Archimedes Repton 3) had ...
by geraldholdsworth
Wed May 13, 2020 12:49 pm
Forum: 8-bit acorn hardware
Topic: Scalers / line doublers which are BBC friendly
Replies: 7
Views: 383

Re: Scalers / line doublers which are BBC friendly

I've found that a Kramer VP-428 works well, and outputs a HDMI signal. However, it does require a VGA signal, so I use a GBS8200 which is relatively inexpensive and works well. If you need the HDMI output, you might be able to find a Kramer unit on auction sites pretty cheap, but if you don't need a...
by geraldholdsworth
Mon May 11, 2020 11:52 am
Forum: general
Topic: Convert RISC OS Font to True Type Font
Replies: 3
Views: 181

Re: Convert RISC OS Font to True Type Font

Dr Fonty worked like a charm, in RISC OS 5 too. However, it would only export to Postscript font file, but the online convertors took this and produced a TTF and WOFF (and WOFF2) file for me ( This one is pretty good). The application for going back the other way was just for future reference. Many ...
by geraldholdsworth
Sun May 10, 2020 9:55 pm
Forum: general
Topic: Convert RISC OS Font to True Type Font
Replies: 3
Views: 181

Re: Convert RISC OS Font to True Type Font

Thank you - I'll give them a whirl.
by geraldholdsworth
Sun May 10, 2020 1:05 pm
Forum: general
Topic: Convert RISC OS Font to True Type Font
Replies: 3
Views: 181

Convert RISC OS Font to True Type Font

Is there a converter to convert a RISC OS font to a True Type Font, and back again?
by geraldholdsworth
Sun May 10, 2020 1:02 pm
Forum: general
Topic: master.ttf
Replies: 20
Views: 1839

Re: master.ttf

Good work. I've converted them all to WOFF and WOFF2 (attached) for use in a browser, if one would so wish to do so.
by geraldholdsworth
Fri May 08, 2020 10:33 pm
Forum: for sale / freebies
Topic: BBC Master ANFS Chip
Replies: 4
Views: 244

Re: BBC Master ANFS Chip

Well I have a Master and an (original) internal and (original) external 6502 co-pro. However, I'm not sure how the ANFS chip would help me, but it would be nice to put it together with the co-pro.

Cheers,

Gerald.
by geraldholdsworth
Wed May 06, 2020 1:30 pm
Forum: archive submissions
Topic: Step by Step Programming Series
Replies: 13
Views: 475

Re: Step by Step Programming Series

My original version doesn't work on my Windows BeebEm either...unsurprisingly. Haven't investigated much further than that (aside from playing with OSRDCH). The source code for the menu is (please excuse my rather rusty assembly knowledge): MODE135 maxlength%=28 datasize%=0 datapkt%=1+maxlength%+1+7...
by geraldholdsworth
Wed May 06, 2020 12:08 pm
Forum: archive submissions
Topic: Step by Step Programming Series
Replies: 13
Views: 475

Re: Step by Step Programming Series

iamaran wrote:
Wed May 06, 2020 10:03 am
The menu works in B-em 2.2 but not BeebEm 4.14 (both for Windows).
Hmmm...interesting. I used BeebEm 4.0a on a Mac to write it. I shall need to investigate...
by geraldholdsworth
Wed May 06, 2020 9:42 am
Forum: archive submissions
Topic: Step by Step Programming Series
Replies: 13
Views: 475

Re: Step by Step Programming Series

No it wasn't typed from the book. I originally wrote it in BASIC and had a !BOOT to EXECute it, but then ran out of catalogue so had to convert it to machine code. It uses OSRDCH to get the character (A-O or SPACE) which then CHAINs the appropriate file. If it's easier, maybe revet back to the BASIC...
by geraldholdsworth
Tue May 05, 2020 9:09 pm
Forum: archive submissions
Topic: Step by Step Programming Series
Replies: 13
Views: 475

Re: Step by Step Programming Series

Is there anywhere to down load the book itself I couldn't find them online, so I presume not. I have been contemplating scanning them in but was dubious because I thought that they were bigger than A4...but, I popped a pad of A4 writing pad on top (just by accident) and they should easily fit my sc...
by geraldholdsworth
Sat May 02, 2020 5:13 pm
Forum: archive submissions
Topic: Step by Step Programming Series
Replies: 13
Views: 475

Re: Step by Step Programming Series

It's a double sided DFS image. Anything that can open an ssd should be able to open a dsd, like BeebEm for example.
by geraldholdsworth
Sat May 02, 2020 9:11 am
Forum: general
Topic: I wonder what this contains?
Replies: 18
Views: 750

Re: I wonder what this contains?

Yep - Superior Interactive had a chat with the seller and requested he removed it.
by geraldholdsworth
Fri May 01, 2020 10:19 pm
Forum: archive submissions
Topic: Step by Step Programming Series
Replies: 13
Views: 475

Step by Step Programming Series

Hi all,

I've painstakingly (OK, not so much) typed in all the listings from the BBC Micro Book One of the Step by Step Programming series by Ian Graham, published by Dorling Kindersley.

Now to work on the Book Two listings.
by geraldholdsworth
Thu Apr 30, 2020 9:02 pm
Forum: programming
Topic: Stack question
Replies: 7
Views: 267

Re: Stack question

For completeness, as I did mention about reading the stack directly: 10FORi=&70TO&7F:?i=0:NEXT 20FORo%=0TO2STEP2 30P%=&5000 40[OPTo% 50TSX 60STX&70 70JSRfn 80.return RTS 90.fn 100TSX 110STX&71 120LDA&101,X 130STA&72 140LDA&102,X 150STA&73 160RTS 170] 180NEXT 190CALL&5000 200sp1=?&70 210sp2=?&71 220r...
by geraldholdsworth
Thu Apr 30, 2020 8:14 pm
Forum: programming
Topic: Stack question
Replies: 7
Views: 267

Re: Stack question

sweh wrote:
Thu Apr 30, 2020 6:46 pm
The DEY at line 480 is wrong and shouldn't be there. You're returning a byte too early and re-running some of the code.
Perfect - thank you.
by geraldholdsworth
Thu Apr 30, 2020 8:12 pm
Forum: programming
Topic: Stack question
Replies: 7
Views: 267

Re: Stack question

How far did you look? Not that far - obviously used the wrong search term. First place I looked was actually your website, then Stardot, then the books I have. I forgot about your 6502 programming tips. But I worked it out and got it the same, almost, as yours - all part of the fun, and learning. T...
by geraldholdsworth
Thu Apr 30, 2020 6:43 pm
Forum: programming
Topic: Stack question
Replies: 7
Views: 267

Re: Stack question

Did you know you made it master only (well 65c02 PLY)? Yes I did - IIRC, I first learnt assembly once I'd bought a Master Compact, BITD, and not on my Acorn Electron which I'd had for a few years previous. Hence the modes above 128 (for shadow modes) and the extra mnemonics. Not sure why I didn't u...
by geraldholdsworth
Thu Apr 30, 2020 5:58 pm
Forum: programming
Topic: Stack question
Replies: 7
Views: 267

Stack question

I've been continuing playing with assembler, and this time I wondered about a printing routine. I've seen the like of: JSRprint:EQUS"Some string":EQUB13 but I can't find the routine in question. So I decided to write my own, which I did and it works. However, I then decided that I might need another...
by geraldholdsworth
Wed Apr 29, 2020 12:56 pm
Forum: general
Topic: I wonder what this contains?
Replies: 18
Views: 750

Re: I wonder what this contains?

Naomasa298 wrote:
Wed Apr 29, 2020 11:27 am
I wonder if it contains any Superior Software games. Someone ring Steve Hanson!
Done.

Looks like it has Citadel included.
by geraldholdsworth
Wed Apr 29, 2020 9:55 am
Forum: programming
Topic: Playing with OSWORD &A
Replies: 13
Views: 366

Re: Playing with OSWORD &A

I have noticed that I have indeed used a couple of 65C02 mnemonics - PHY and PLY. If you do this on the BBC or Electron you'll need to use TYA:PHA and PLA:TAY. You'll also need to move the TYA:PHA to the other side of the STA buffer at the start of the loop.
by geraldholdsworth
Wed Apr 29, 2020 9:46 am
Forum: programming
Topic: Playing with OSWORD &A
Replies: 13
Views: 366

Re: Playing with OSWORD &A

SimonSideburns wrote:
Tue Apr 28, 2020 9:58 pm
I recall a font routine that could display a multitude of different styles: bold, thin, italics, underlined, inverse, rotated 90° in either direction, double width, and any combinations thereof.
Presumably this would require a redirection of OSWRCH to the font routine?
by geraldholdsworth
Wed Apr 29, 2020 8:51 am
Forum: general
Topic: I wonder what this contains?
Replies: 18
Views: 750

Re: I wonder what this contains?

It may be distributed freely online, but that doesn't mean that what is available freely online should be available freely online. There are still some authors and companies of this software that are still protecting their intellectual property.
by geraldholdsworth
Tue Apr 28, 2020 4:54 pm
Forum: programming
Topic: Playing with OSWORD &A
Replies: 13
Views: 366

Re: Playing with OSWORD &A

Cheers - hadn't thought of doing it that way. I've been trying to combine all the routines into a single bit of code and my head is now hurting trying to reduce replication and code size. I'll have a play with this method and see if that works better for me. So far, I've got: 10MODE135 20DIMcode&143...
by geraldholdsworth
Tue Apr 28, 2020 12:00 pm
Forum: programming
Topic: Playing with OSWORD &A
Replies: 13
Views: 366

Re: Playing with OSWORD &A

I've been playing some more (spurred on by the Futuristic font)... Bold font: 10MODE135 20DIMcode%&79 30FORo%=0TO2STEP2 40P%=code% 50[OPTo% 60 LDY#0 70.loop 80 LDA string%,Y 90 CMP#13 100 BEQexit 110 STA buffer% 120 PHY 130 LDA#&A 140 LDX#buffer% MOD256 150 LDY#buffer% DIV256 160 JSR&FFF1 170 LDA#23...
by geraldholdsworth
Tue Apr 28, 2020 11:58 am
Forum: programming
Topic: Playing with OSWORD &A
Replies: 13
Views: 366

Re: Playing with OSWORD &A

In Jeltron, I used a similar technique for italics and shifting and anding the top and shifting and oring the bottom to give a "futuristic" font. Like this? 10MODE135 20DIMcode%&83 30FORo%=0TO2STEP2 40P%=code% 50[OPTo% 60 LDY#0 70.loop 80 LDA string%,Y 90 CMP#13 100 BEQexit 110 STA buffer% 120 PHY ...
by geraldholdsworth
Mon Apr 27, 2020 2:14 pm
Forum: programming
Topic: Playing with OSWORD &A
Replies: 13
Views: 366

Playing with OSWORD &A

So I decided to go back to 8 bit programming, which I do every so often, and have a play with OSWORD &A (read character definition). At first I wrote, in BASIC, a program to turn a string upside down and position it centrally on the screen. It was kinda slow, so I knocked up this, in assembler: 10MO...
by geraldholdsworth
Sun Apr 26, 2020 9:33 pm
Forum: programming
Topic: Halving mode screen memory
Replies: 5
Views: 295

Re: Halving mode screen memory

Then there is always this.
by geraldholdsworth
Sun Apr 26, 2020 9:22 am
Forum: 32-bit acorn software: other
Topic: RO600Hook folder
Replies: 2
Views: 248

Re: RO600Hook folder

Here's mine.
Should have an ISO of the CD too, somewhere.
by geraldholdsworth
Fri Apr 24, 2020 5:53 pm
Forum: 8-bit acorn software: other
Topic: Step by Step Programming on the BBC/Electron
Replies: 1
Views: 209

Re: Step by Step Programming on the BBC/Electron

Well, it appears that I only have Book Two of the Electron version, but I'm sure the listings will be the same. Most are the same for Book Two, except for the games. So I'll start typing these in later. In hindsight, I should've posted this in either Programming or Software Archive...oh well, no mat...

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