Search found 6 matches

by tricky
Sat Sep 14, 2019 11:10 am
Forum: Amstrad CPC Assembly Programming
Topic: Video: Setting the CPC screen with CRTC registers - Learn Z80 Lesson P39
Replies: 2
Views: 9609

Re: Video: Setting the CPC screen with CRTC registers - Learn Z80 Lesson P39

Nice intro to vertical rupture, I use it in most of my games on the BBC, so sorry for being slightly of off topic. For Astro Blaster, I use it in a standard way to get a split screen with scrolling play area and a separate status area. The other thing I use it for is displaying vertical arcade games...
by tricky
Sat Sep 07, 2019 8:29 am
Forum: BBC Micro Assembly Programming
Topic: Lesson P17 - Palette definitions on the BBC
Replies: 1
Views: 11541

Re: Lesson P17 - Palette definitions on the BBC

The beeb has had many palette extenders over the years (1st in 1982), but the most recent is the Video NuLA (New ULA), allows a palette of r4g4b4 and two modes of mapping the beebs 16 colours (actually 8 + 8 fixed flashing combinations - why!!!) to what you see. The first mode allows you to remap th...
by tricky
Sat Aug 31, 2019 8:21 pm
Forum: PDP-11 Assembly Programming
Topic: PDP-11
Replies: 24
Views: 26459

Re: PDP-11

You can run a PDP-11 processor as a co-pro on a beeb and it might be supported by one of the emulators.
Keep an eye out for JGH on the stardot forums, he seems to know quite a bit about PDP-11s.
by tricky
Sat Aug 31, 2019 8:06 pm
Forum: Show and Tell
Topic: A port of TimePilot for Atari XL/XE
Replies: 2
Views: 7127

Re: A port of TimePilot for Atari XL/XE

I was looking at this a while ago, great work.
by tricky
Sun Aug 18, 2019 11:12 am
Forum: Introductions
Topic: Hello from a beeb coder
Replies: 5
Views: 7142

Hello from a beeb coder

Hi, I've been programming the beeb since I got one in early '82. I love golden age arcade games and porting them to the beeb to show what could have been done if there was a big enough commercial audience to make it worth while. Some of my games/ports are here on bbcmicro.co.uk I am currently workin...
by tricky
Sun Aug 18, 2019 10:58 am
Forum: Show and Tell
Topic: Bushido Bomb
Replies: 6
Views: 9023

Re: Bushido Bomb

Great game, how much 6502/NES experience did you have and how long did it take to get that working on a NES?

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