Search found 69 matches

by dfzx
Wed Apr 18, 2018 6:47 am
Forum: Programming
Topic: Crashing a program with DFSZ pokes.
Replies: 13
Views: 135

Re: Crashing a program with DFSZ pokes.

I think I must be missing the purpose of this. What do these magic POKEs do which RANDOMIZE USR 0 doesn't?
by dfzx
Tue Apr 17, 2018 7:59 am
Forum: Programming
Topic: Double buffering on the Spectrum
Replies: 40
Views: 822

Re: Double buffering on the Spectrum

if you put the still stuff like score and logo in the top third of the screen and simply used interrupt mode 2, to use the time the raster takes to traverse the first third of the screen.. to draw the sprites on the bottom two thirds how is that better/worse than... putting the still stuff in the b...
by dfzx
Wed Apr 04, 2018 10:34 am
Forum: Programming
Topic: Algorithm for Jetpac's lasers
Replies: 5
Views: 175

Re: Algorithm for Jetpac's lasers

Nomad wrote:
Wed Apr 04, 2018 10:29 am
My google-fu might not be up to scratch - I can't find a disassembly.
s'ok, I doubt I'd understand it. :)

The graphical sequence looks like the sort of thing that should be expressible in BASIC, but I can't quite get my head around where to start with it.
by dfzx
Wed Apr 04, 2018 9:40 am
Forum: Programming
Topic: Algorithm for Jetpac's lasers
Replies: 5
Views: 175

Algorithm for Jetpac's lasers

I've always liked the effect used to draw the laser firing in Jetpac. I started wondering how it was done, so I slowed the game down in an emulator and tried to work it out. As far as I can tell, it's a line drawn partly as a solid line, partly with long dashes, and partly with smaller dashes. The l...
by dfzx
Mon Apr 02, 2018 2:22 pm
Forum: Announcements
Topic: The Spectrum Show Ep 71 now live
Replies: 8
Views: 258

Re: The Spectrum Show Ep 71 now live

Enjoyable as ever, @PaulJ.

It occurs to me... Do you have an easily consumable/machine-parsable list of the games mentioned in each episode? Transcripts, maybe? Spectrum Show references might make a useful addition to ZXDB.
by dfzx
Sat Mar 31, 2018 6:46 pm
Forum: Emulators
Topic: Fuse 1.5.2 released
Replies: 18
Views: 465

Re: Fuse 1.5.2 released

I think you can still use the old autoload snapshots on a dev workflow: fuse tape_48.szx --tape your_tape.tap Choose the autoload snapshot from an old version or here: https://sourceforge.net/p/fuse-emulator/fuse/ci/fuse-1.4.0/tree/lib/compressed Thanks. That’s too convoluted, though, but I might g...
by dfzx
Sat Mar 10, 2018 4:00 pm
Forum: Emulators
Topic: Fuse 1.5.1 released
Replies: 39
Views: 1093

Re: Fuse 1.5.1 released

I know, but fuse-utils is not part of the distribution. This GLIB is not mentioned in the README, so does anyone have a clue of which library this is, before I dive in ? Fair enough. As I say, I don't do Mac... :) Glib is the GNOME graphics library. Top link of a Google search points me here: http:...
by dfzx
Sat Mar 10, 2018 3:36 pm
Forum: Emulators
Topic: Fuse 1.5.1 released
Replies: 39
Views: 1093

Re: Fuse 1.5.1 released

I tried to download fuse-utils for MAC, but apparently there is no specific download of binaries for MAC. I went to https://sourceforge.net/projects/fuse-emulator/files/fuse-utils/1.4.0/ and press the DOWNLOAD green button, but got fuse-1.5.1.tar.gz Not a very good UI from sourceforge (yeah, it has...
by dfzx
Tue Mar 06, 2018 9:35 am
Forum: Website
Topic: Moderator Action
Replies: 95
Views: 3128

Re: Moderator Action

Hmm. I departed the other place largely because of unjustified (or unjustifiable) censorship, disappearing posts and seemingly-kneejerk bans. I like this place plenty and would hate to see it head down the same path. Transparency is good, and this explanation certainly has merit. However, I admit t...
by dfzx
Tue Mar 06, 2018 9:14 am
Forum: Showcase your work!
Topic: z88dk documentation series, installment 8: interrupts
Replies: 0
Views: 86

z88dk documentation series, installment 8: interrupts

I've added installment 8 to my 'Getting Started with C on the ZX Spectrum using Z88DK' development guide. This one covers mode 2 interrupt handling from 'C': https://github.com/z88dk/z88dk/blob/master/doc/ZXSpectrumZSDCCnewlib_08_Interrupts.md First in the series is here: https://github.com/z88dk/z8...