Search found 218 matches

by jregel
Tue Oct 20, 2020 9:29 pm
Forum: off-topic
Topic: Super PSG SN76489 emulator
Replies: 3
Views: 181

Super PSG SN76489 emulator

Has anyone seen this software that emulates a SN76489 sound chip in a sequencer? https://www.alyjameslab.com/alyjameslabsuperpsg.html The results are really impressive (there's a selection of tracks at the above link). Is the BBC is capable of doing this, or is the chip being used in a different way...
by jregel
Sat Sep 26, 2020 7:53 pm
Forum: 8-bit acorn software: classic games
Topic: Acorn - A World in Pixels - new book
Replies: 18
Views: 1151

Re: Acorn - A World in Pixels - new book

Looks interesting and I've seen similar books for other platforms, so it's nice to get something Acorn related for a change. Pre-ordered.
by jregel
Sun Sep 06, 2020 12:40 pm
Forum: archive submissions
Topic: Bladedancer
Replies: 20
Views: 1631

Re: Bladedancer

Hey all, As promised, here's something I've written about my side of helping to rescue Bladedancer: http://www.dirtyfeed.org/2020/09/rescuing-bladedancer/ No technical insights here, more of a personal tale. Hopefully it fills in some gaps for those who are interested. I enjoyed reading that. Thanks.
by jregel
Fri Sep 04, 2020 1:35 pm
Forum: 8-bit acorn hardware
Topic: Questions for Jon Thackray about the BBC Micro O.S. Rom
Replies: 29
Views: 1271

Re: Questions for Jon Thackray about the BBC Micro O.S. Rom

BBC BASIC is credited as being invented by Sophie Wilson, but the MOS doesn't appear to have a single person attributed to it. How many people were involved in writing the MOS, and did this change/increase for the Master series? The idea of making OS calls hardware independent and work in a Tube-com...
by jregel
Sat Aug 22, 2020 11:01 pm
Forum: programming
Topic: A new BBC Micro MOS Reassembly
Replies: 32
Views: 1714

Re: A new BBC Micro MOS Reassembly

Really interesting to look through this.

I will be spending quite a bit of time going over it!

Thanks very much for sharing all this hard work.

Any plans to do the Master MOS..? :-)
by jregel
Wed Aug 12, 2020 10:35 am
Forum: other vintage hardware, software and languages
Topic: ZX Spectrum next... Anybody backing ?
Replies: 194
Views: 26768

Re: ZX Spectrum next... Anybody backing ?

dominicbeesley wrote:
Wed Aug 12, 2020 10:14 am
I got one...i even managed an early bird one.

Not sure what I'll do with it yet

D
Add the Blitter board to the BeebFPGA port...? :-)
by jregel
Tue Aug 11, 2020 9:41 pm
Forum: other vintage hardware, software and languages
Topic: ZX Spectrum next... Anybody backing ?
Replies: 194
Views: 26768

Re: ZX Spectrum next... Anybody backing ?

I backed it too. While it's cost more than I was originally expecting, there's a lot less risk than the first Kickstarter as the team and product are both proven.

One of the main reasons I've backed it is the BeebFPGA port. That made it a must-have purchase.
by jregel
Sun Jul 26, 2020 11:07 am
Forum: 8-bit acorn hardware
Topic: Master vs Master Compact
Replies: 18
Views: 916

Re: Master vs Master Compact

Is the Basic the same as the one in the Master? Are all the VDU calls the same? I don't think so - I believe the Compact has an improved version of BASIC 4 as I remember reading that Acorn speeded up some aspects. I thought the improved BASIC was included in MOS 3.50 and that this version picked up...
by jregel
Sat Jul 25, 2020 7:09 pm
Forum: programming
Topic: Beebspriter
Replies: 7
Views: 814

Re: Beebspriter

AJW wrote:
Sat Jul 25, 2020 1:23 pm
Also - VDU 23,27 - are your using an Acornsoft sprite ROM?
Yes (or more specifically, the SPRITER ROM image from the Welcome Disc on my Master).
by jregel
Sat Jul 25, 2020 12:27 pm
Forum: programming
Topic: Beebspriter
Replies: 7
Views: 814

Re: Beebspriter

I exported the sprite in Row-major format with transparent pixels as colour 0 set and excluding the header file generation. I then *LOADED the data to screen memory and it displayed okay. Then it was simply a case of using two MOVE commands (bottom left of sprite and top right of sprite) and then VD...
by jregel
Thu Jul 23, 2020 8:38 pm
Forum: new projects in development: games
Topic: Turn-based strategy game
Replies: 4
Views: 401

Re: Turn-based strategy game

Looks really nice. The use of colour is great and gives a good illusion of green and brown (to my eyes, anyway!).
by jregel
Mon Jul 13, 2020 9:52 pm
Forum: archive submissions
Topic: TAOS
Replies: 4
Views: 372

Re: TAOS

I remember reading about this back in the day.

There's some interesting commentary from someone who worked for Tao:

https://news.ycombinator.com/item?id=9806607
by jregel
Sun Jul 12, 2020 10:33 pm
Forum: past all-day virtual ABugs
Topic: All-day 'Virtual' Acorn session #5, Saturday 4th July 2020, 9am - 10pm
Replies: 70
Views: 4512

Re: All-day 'Virtual' Acorn session #5, Saturday 4th July 2020, 9am - 10pm

Really enjoyed Paul Fellows' talk and to see how things progressed from the GXR ROM to Arthur to RISCOS.

Amazing how so few people managed to build Arthur in so short a time. And it's interesting to see how the Archimedes really is a "next-gen" Beeb in lots of ways.
by jregel
Sun Jul 12, 2020 1:51 pm
Forum: archive submissions
Topic: Elite SNG-45 (2nd proc edition), SSD and images of materials
Replies: 8
Views: 667

Re: Elite SNG-45 (2nd proc edition), SSD and images of materials

What is different about this version vs the other 2nd processor versions available?
by jregel
Sun Jul 05, 2020 11:18 am
Forum: programming
Topic: About BBC Basic 4
Replies: 110
Views: 4811

Re: About BBC Basic 4

New question : Is it possible to hide the code of Basic 4 basic program ? My game is an adventure game and I don't want to give clue/solution into the code (as it will be a big challenge to finish it) I'd suggest that the abilities of some in this forum are such that any attempts to hide your code ...
by jregel
Wed Jul 01, 2020 9:46 am
Forum: programming
Topic: About BBC Basic 4
Replies: 110
Views: 4811

Re: About BBC Basic 4

I'd recommend the BASIC Editor ROM that Tom Seddon has updated and extended: https://github.com/tom-seddon/basic_editor The manual for the original release is here: https://github.com/tom-seddon/basic_editor/blob/master/docs/BASIC_Editor_Manual.pdf Tom has changed/improved some of the keyboard comma...
by jregel
Wed Jul 01, 2020 9:23 am
Forum: 8-bit acorn hardware
Topic: Pi-based Co-Pro on the cheap - 100MHz 6502 for £10? (now 290MHz)
Replies: 1268
Views: 166009

Re: Pi-based Co-Pro on the cheap - 100MHz 6502 for £10? (now 274MHz)

Could the pre-loader be used to load ARM BASIC if an ARM co-pro is selected? If I understand the intent here, I think this would be a very useful feature. Although I guess it's not too difficult to load up ARM BASIC from the CLI, having it automatically start would make it more accessible and easie...
by jregel
Tue Jun 30, 2020 11:03 pm
Forum: new ideas wishlist & general chat
Topic: Frontier Elite 2
Replies: 54
Views: 2777

Re: Frontier Elite 2

Wow!

I never thought I'd see Frontier Elite 2 running on a BBC! The Pi/VideoNULA combination is opening up so many possibilities! Fantastic work.
by jregel
Mon Jun 22, 2020 10:59 am
Forum: programming
Topic: Maximising memory for BASIC program
Replies: 23
Views: 1670

Re: Maximising memory for BASIC program

PRINT ~HIMEM - (!2AND&FFFF) Eek, that's highly non-portable. The legal way to do it is: DIM P% -1 : PRINT ~ HIMEM-P% Please could you explain what's happening here? As I read it, you're creating a byte array that is 0 bytes long? Would this be added to the end of stored variables, so removing HIMEM...
by jregel
Fri Jun 19, 2020 10:12 pm
Forum: programming
Topic: Sprite Masking
Replies: 26
Views: 1888

Re: Sprite Masking

Thanks Andrew, that was really helpful and it makes sense.

I've done a bit of playing with the approach you suggested and it's working!

You say that's how you did it for Planet Nubium Two. What did you do for the first game?
by jregel
Fri Jun 19, 2020 8:02 pm
Forum: programming
Topic: Sprite Masking
Replies: 26
Views: 1888

Sprite Masking

I've spent the afternoon (off work!) trying to get my head around sprite masks and would appreciate some guidance. So I'm wanting to plot a sprite onto a background, but I don't want an ugly box around sprite, so the answer is to use a mask, right? The parts of the sprite I don't want to display are...
by jregel
Thu Jun 18, 2020 8:44 pm
Forum: 8-bit acorn hardware
Topic: Beeb FPGA port to Spectrum Next
Replies: 108
Views: 11572

Re: Beeb FPGA port to Spectrum Next

To return to the earlier discussion about turbo CPU modes, what's possible is largely driven by the external SRAM, and how fast you are able to drive it. Currently BeebFPGA generates 8 external SRAM memory cycles every microsecond: - 2 for the 2MHz main CPU - 2 for the Video processor - 4 for the I...
by jregel
Thu Jun 18, 2020 10:54 am
Forum: 8-bit acorn hardware
Topic: A blitter for the beeb?
Replies: 132
Views: 17493

Re: A blitter for the beeb?

Thanks both for the interest. jregel, everything runs at 8MHz at present though I might look at pushing that to 16 to allow uncontended access between the cpu and chipset. At present there is (an over-complicated) arbitration and bus switching arrangement which I keep meaning to simplify. The "bus"...
by jregel
Wed Jun 17, 2020 1:12 pm
Forum: 8-bit acorn hardware
Topic: A blitter for the beeb?
Replies: 132
Views: 17493

Re: A blitter for the beeb?

Hi Really enjoyed watching the ABUG presentation on the Blitter board. A few additional questions came to mind as a result: You mentioned that the soft CPU can run up to 8Mhz. What clock speed does the rest of the Blitter board/FPGA run at (the DMA co-processor, Blitter, Sound, and Aeris)? In a prev...
by jregel
Tue Jun 16, 2020 9:04 am
Forum: new projects in development: games
Topic: RPG project
Replies: 103
Views: 6493

Re: RPG project

Naomasa298 wrote:
Mon Jun 15, 2020 6:08 pm
The cast is complete!

Untitled.png

Guest starring Harry Potter, Gandalf, Inigo Montoya and Ivan Drago (and also two characters from a NES game, which shall remain anonymous :) ).
This looks really good. I'm following this thread and project with interest.
by jregel
Tue Jun 02, 2020 8:22 pm
Forum: programming
Topic: VDU-stream 'sprites'
Replies: 16
Views: 1173

Re: VDU-stream 'sprites'

As noted in another thread, a nice feature of Acorn's VDU-stream approach to graphics is that you can store multiple graphics commands in a string variable and PRINT the whole lot in one go. By ensuring all the graphics commands use only relative coordinates you can plot the resulting 'object' wher...
by jregel
Mon Jun 01, 2020 10:12 pm
Forum: programming
Topic: "Legally" writing to the screen
Replies: 17
Views: 1152

Re: "Legally" writing to the screen

It would be helpful to understand why using a 'legal' method to write to the screen is important. The reasons I can think of are: Portability between Acorn platforms, so same the program runs on Elk, Beeb, Master, Archimedes possibly even BBC BASIC for Windows? Program is being written in BASIC and...
by jregel
Sat May 30, 2020 12:03 pm
Forum: programming
Topic: "Legally" writing to the screen
Replies: 17
Views: 1152

Re: "Legally" writing to the screen

Thanks for all the suggestions. Agree that VDU5 will be a bit slow for what I was looking for. Although I mentioned sprites (and this is a use case I’m interested in), I was also thinking in terms of displaying pictures, whereby the source data is in the correct screen format and just needs a way to...

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