Search found 94 matches

by Kevin Edwards
Tue Jul 17, 2018 10:08 pm
Forum: development tools
Topic: Beebasm requests
Replies: 9
Views: 174

Re: Beebasm requests

Thanks Rich for the code changes. I shall plug them in. I may have a go at implementing the A% to Z% variables, but my time is in short supply at present. Cheers, tricky for details about your build process. Looks like something i will investigate once i've got the current project in a buildable sta...
by Kevin Edwards
Tue Jul 17, 2018 12:28 pm
Forum: development tools
Topic: Beebasm requests
Replies: 9
Views: 174

Re: Beebasm requests

COPYBLOCK, sounds interesting! Can't find it in the docs, but noticed it in the version history.
Not that i'd ever use it for any hackery :lol:
by Kevin Edwards
Tue Jul 17, 2018 12:15 pm
Forum: development tools
Topic: Beebasm requests
Replies: 9
Views: 174

Re: Beebasm requests

Hi Rich, Thanks for the quick response. I can see why re-definable 'normal' variables would be problematic! If support for A% to Z% could be added then that would be so cool. I also use B% below to keep track of the start of the code block in each source file so i can see how large each block of obj...
by Kevin Edwards
Tue Jul 17, 2018 12:02 pm
Forum: projects
Topic: Elite BeebAsm Source
Replies: 16
Views: 542

Re: Elite BeebAsm Source

Awesome work, Kieran!

I remember looking through the original code years ago and it made my eyes bleed! Not because I didn't follow the code, but because of the (lack of) formatting and the short labels etc.

Must re-visit it and have a play.

Cheers,
Kevin.
by Kevin Edwards
Tue Jul 17, 2018 11:46 am
Forum: development tools
Topic: Beebasm requests
Replies: 9
Views: 174

Beebasm requests

Hi, I'm not sure if this is the right place for Beebasm requests, hopefully it is. Basically, i'm moving some old BBCBasic style 6502 assembly source code over to beebasm and found that it would be really useful if there were some re-definable variables that i could make use of - A% to Z% would be i...
by Kevin Edwards
Wed Jul 11, 2018 12:09 pm
Forum: software: new games
Topic: Galaforce 3 Teaser
Replies: 9
Views: 399

Galaforce 3 Teaser

It's been 30 years since Galaforce 2 was completed. Here's something I've been tinkering with. An updated version of Galaforce 2 for 2018. Galaforce_3_Teaser_grab.jpg Video can be found here https://youtu.be/wg_UPyQM6eA More Beeb related Stuff on Twitter https://twitter.com/KevEdwardsRetro .
by Kevin Edwards
Mon Jun 25, 2018 9:42 pm
Forum: adventures
Topic: Search for the Lost Orb
Replies: 14
Views: 803

Re: Search for the Lost Orb

Yes, Andy co-wrote the AUG. IIRC The authors were all at Cambridge, but at different colleges when they wrote the AUG. This adventure was several years later i believe when Andy worked for Acorn as a contractor around 1986/7. Sadly, I lost touch with him shortly afterwards so can't ask him if he kno...
by Kevin Edwards
Sun Jun 24, 2018 11:34 am
Forum: adventures
Topic: Search for the Lost Orb
Replies: 14
Views: 803

Re: Search for the Lost Orb

Hi guys, I've done a bit more digging and have remembered a bit more about the disk. I knew a lot of people who developed Beeb games and a Cambridge connection is quite possible - Acorn / Acornsoft? I travelled to Cambridge and London quite a bit during 1985-87 so i'm guessing I picked it up during ...
by Kevin Edwards
Mon Jun 18, 2018 11:48 am
Forum: adventures
Topic: Search for the Lost Orb
Replies: 14
Views: 803

Re: Search for the Lost Orb

Hi Lee,

It's for the Beeb AFAICT.

Here's the disk image. Can't tell you any more about it i'm afraid.

CH."B.SEARCH"

Hope it's of interest to someone!

Cheers,
Kevin.
by Kevin Edwards
Mon Jun 18, 2018 11:07 am
Forum: adventures
Topic: Search for the Lost Orb
Replies: 14
Views: 803

Search for the Lost Orb

Hi,

Whilst sorting through a load of disks I found a disk based adventure called 'Search for the Lost Orb'

Has anyone heard of it before? I've no idea who did it or where it came from...
lostorb1.jpg
lostorb2.jpg
by Kevin Edwards
Wed May 30, 2018 4:11 pm
Forum: emulators
Topic: Emulator setup to make all ROM area writes use bank 15 SWR
Replies: 23
Views: 480

Re: Emulator setup to make all ROM area writes use bank 15 SWR

You can see a list of the work he has done here. http://www.mobygames.com/developer/sheet/view/developerId,4639/ The first commercial game he did audio for was Atomic Protector on the BBC Micro. He then did Music and SFX for the following Beeb games:- Crazee Rider, Galaforce Galaforce 2 Wizadore, St...
by Kevin Edwards
Wed May 30, 2018 4:00 pm
Forum: emulators
Topic: Emulator setup to make all ROM area writes use bank 15 SWR
Replies: 23
Views: 480

Re: Emulator setup to make all ROM area writes use bank 15 SWR

Yes, Paul Proctor, Chris Roberts, Martin Galway and myself all went to the same high school and we wrote software for the Beeb in a ( friendly ) competitive manner!
by Kevin Edwards
Wed May 30, 2018 3:46 pm
Forum: emulators
Topic: Emulator setup to make all ROM area writes use bank 15 SWR
Replies: 23
Views: 480

Re: Emulator setup to make all ROM area writes use bank 15 SWR

Alien 8 I have spotted 2 calls directly into OS1.20 1.) JSR &CCB3 - The back end of the CLS code, clearing from &6B00 to &7FFFF. 2.) JSR &E9B6 - Wait for VSYNC ( &240 chainging value ) All to save memory. The quick CLS code saves a lot of memory and wouldn't be easy to patch in. We do have multiple ...
by Kevin Edwards
Wed May 30, 2018 2:56 pm
Forum: emulators
Topic: Emulator setup to make all ROM area writes use bank 15 SWR
Replies: 23
Views: 480

Re: Emulator setup to make all ROM area writes use bank 15 SWR

That raises a good point. Are the various copies of Alien 8, Knight Lore etc. compatible with a Master 128 ( with MOS, not OS1.2 )- has somone patched them up? I have the source now and could probably sort them out. The Electron decoder was basically the same without 6522 code. You couldn't modify t...
by Kevin Edwards
Wed May 30, 2018 2:03 pm
Forum: emulators
Topic: Emulator setup to make all ROM area writes use bank 15 SWR
Replies: 23
Views: 480

Re: Emulator setup to make all ROM area writes use bank 15 SWR

Based on feedback I got from publishers and hackers, the protection was very effective at slowing down the rate of piracy - you can never stop it! My aim was to make transfering the games from tape to disk as difficult as possible. It certainly did work and I know countless people who gave up trying...
by Kevin Edwards
Wed May 30, 2018 1:13 pm
Forum: emulators
Topic: Emulator setup to make all ROM area writes use bank 15 SWR
Replies: 23
Views: 480

Re: Emulator setup to make all ROM area writes use bank 15 SWR

Hi Rich, I stopped using the continuous stream because of tape loading errors and feedback. Your average user was use to rewinding the tape if they got an error and continuing and I didn't support that at the time. It was easier to go back to 'familiar' acorn tape data format. I could have spent mor...
by Kevin Edwards
Tue May 29, 2018 8:37 pm
Forum: emulators
Topic: Emulator setup to make all ROM area writes use bank 15 SWR
Replies: 23
Views: 480

Re: Emulator setup to make all ROM area writes use bank 15 SWR

The encoding phase took less than 30 minutes IIRC. 255 iterations of the encoder. Then hit break and save out the data. I changed the Video memory start address to show the memory being encoded so that I knew when it had completed. Repeat for each decoder - Exile and Nightshade had lots of them!
by Kevin Edwards
Tue May 29, 2018 6:50 pm
Forum: emulators
Topic: Emulator setup to make all ROM area writes use bank 15 SWR
Replies: 23
Views: 480

Re: Emulator setup to make all ROM area writes use bank 15 SWR

Yay! It lives.

Solution was to set Bank 15 to RAM and remove ALL other RAM banks - great advice dv8.

Bank 14 was set to Basic II.

Thanks everyone!
Kevin.

Alien8_Start.jpg
Alien8_Run1.jpg
Alien8_Run2.jpg
by Kevin Edwards
Tue May 29, 2018 5:55 pm
Forum: emulators
Topic: Emulator setup to make all ROM area writes use bank 15 SWR
Replies: 23
Views: 480

Re: Emulator setup to make all ROM area writes use bank 15 SWR

Thanks everyone for the suggestions and information I shall try re-wiring the RAM bank mappings so that there is only one bank ( 4 ) and hack the build code to select bank 4 when it saves out the object code. Fingers crossed! All the best, Kevin. PS. Rich, sadly I threw out 95% of the decoder/encode...
by Kevin Edwards
Tue May 29, 2018 4:44 pm
Forum: emulators
Topic: Emulator setup to make all ROM area writes use bank 15 SWR
Replies: 23
Views: 480

Re: Emulator setup to make all ROM area writes use bank 15 SWR

Hi Rich, Yes, I think it was an early SideWise ROM/RAM card with an 8K Static RAM chip installed - but that's what i believe is installed in my friends machine. All writes, irrespective of ROMSEL went to this RAM. What I need is a ROMSEL( RAMSELl? ) override in the emulator. :D It's a rather messy b...
by Kevin Edwards
Tue May 29, 2018 4:19 pm
Forum: emulators
Topic: Emulator setup to make all ROM area writes use bank 15 SWR
Replies: 23
Views: 480

Emulator setup to make all ROM area writes use bank 15 SWR

Hi, I'm trying to get some old source code to compile under emulation. However, it has certain requirements that i can't quite configure in B-Em or BeebEm. The code is split across multiple files and these are assembled one at a time using a simple overlaying system. O% is set to &8000 at the start ...
by Kevin Edwards
Tue Jan 23, 2018 1:34 pm
Forum: past events & exhibitions
Topic: ABug NORTH User Group meeting | 19-21 JAN 2018 | MANCHESTER *BOOKING INFO*
Replies: 143
Views: 10665

Re: ABug NORTH User Group meeting | 19-21 JAN 2018 | MANCHESTER *BOOKING INFO*

Hi, I'd also like to thank Dave M and this team for another excellent event and to all the members who took the time to haul themselves over to *sunny* Manchester to take part. It was great to meet many of you and match faces to names. Sadly, I had a limited amount of time to visit on Saturday, but ...
by Kevin Edwards
Mon Jan 22, 2018 11:09 am
Forum: archive requests
Topic: Personal Computer News. Missing Games.
Replies: 31
Views: 1995

Re: Personal Computer News. Missing Games.

I just found the description for Road Hog and it kindly confirms that i lived in Didsbury, Manchester. Now 100% sure it was me!

Thanks again for the detective work everyone. Especially Dave_E for his original work!
PCN_RoadHogDescription.PNG
by Kevin Edwards
Sun Jan 21, 2018 9:27 pm
Forum: projects
Topic: New game - tube type thingy
Replies: 49
Views: 3440

Re: New game - tube type thingy

Hi Sarah. I'd say faster frame rate would be best. Most gamers care more about FPS than resolution / detail, but not everyone! How easy would it be to allow the user to select their preference, either in the front end menu, or ideally, 'on-the-fly''? Also, if it is possible to change 'on-the-fly' yo...
by Kevin Edwards
Wed Jan 17, 2018 12:37 pm
Forum: software: other
Topic: ASBAS Assembly Orientated BASIC
Replies: 5
Views: 519

Re: ASBAS Assembly Orientated BASIC

Sure, but the issue is to do with BBC BASIC keyword tokens. All of the token IDs in HI-BBC BASIC ( $80-$FF ) are used so they had to piggy-back existing tokens with new commands and functionality. As you are unlikely to use SIN, COS, TAN etc, when writinglarge scale assembly code, these were the obv...
by Kevin Edwards
Wed Jan 17, 2018 12:05 pm
Forum: software: other
Topic: Accessing ROMs from the 6502 second processor
Replies: 15
Views: 1174

Re: Accessing ROMs from the 6502 second processor

It's a shame OSWORD 5 didn't include the option to specify a ROM number then that would have been a complete and clean way to read IO memory using an approved API. OSRDRM was the legal way to select and read the contents of sideways ROMs when running in non-tube mode. Useful for 'ripping' ROM images...
by Kevin Edwards
Wed Jan 17, 2018 10:57 am
Forum: software: other
Topic: ASBAS Assembly Orientated BASIC
Replies: 5
Views: 519

Re: ASBAS Assembly Orientated BASIC

I'm not sure who the original author is, but they obviously had a very good understanding of the Basic interpreter and knew their way around the ROM routines.
by Kevin Edwards
Wed Jan 17, 2018 10:17 am
Forum: software: other
Topic: ASBAS Assembly Orientated BASIC
Replies: 5
Views: 519

ASBAS Assembly Orientated BASIC

Hi, Whilst going through my archived discs i found one called ASBAS. I haven't seen any mention of it in the forums and wondered if anyone has ever used it or is interested in it? Basically, it's a hacked version of HIBASIC (cmos) that has been modified to include extensions useful for assembly lang...
by Kevin Edwards
Wed Jan 17, 2018 9:44 am
Forum: software: other
Topic: Accessing ROMs from the 6502 second processor
Replies: 15
Views: 1174

Re: Accessing ROMs from the 6502 second processor

It's a bit odd that OSRDRM wasn't implemented 'across the tube' as it was designed to be the 'clean' way to access IO processor ( and ROM ) memory in the first place.

I'm sure there's a good explanation why.
by Kevin Edwards
Wed Jan 17, 2018 9:18 am
Forum: archive requests
Topic: Personal Computer News. Missing Games.
Replies: 31
Views: 1995

Re: Personal Computer News. Missing Games.

Many thanks for the image and website update guys!

Yes, it does look like some quick and dirty MODE 7 game i knocked up in BASIC many moons ago when i was about 17.

Another one for my 'softogrophy' list.

Cheers.