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VSYNC FunctionI have written a VSYNC function, so that I can clear the screen before redraw without flicker on the screen, I do this by peeking at the address 2367…
I am such a fool, all I needed was HALT, Aghhhhhhhhhhh
So many thanks -
VSYNC FunctionI have written a VSYNC function, so that I can clear the screen before redraw without flicker on the screen, I do this by peeking at the address 2367…
... fool, all I needed was HALT, Aghhhhhhhhhhh
So many ... the first instruction after the halt. You'd save time if ... -
I've done it - so can you!I've just paid for Spectaculator. It only took about an hour for the registration code to come through!! This is simply the best emulator that I hav…
... 't crash it to a halt ;).
It works okay on ... -
VSYNC FunctionI have written a VSYNC function, so that I can clear the screen before redraw without flicker on the screen, I do this by peeking at the address 2367…
Interesting, but what if you weren't using BASIC at all and the entire program was in assembly? Would HALT serve the purpose then? -
VSYNC FunctionI have written a VSYNC function, so that I can clear the screen before redraw without flicker on the screen, I do this by peeking at the address 2367…
... program was in assembly? Would HALT serve the purpose then?
halt will be executed around 19 ... this thread (prior to the halt) was reading the frames system ... -
VSYNC FunctionI have written a VSYNC function, so that I can clear the screen before redraw without flicker on the screen, I do this by peeking at the address 2367…
... program was in assembly? Would HALT serve the purpose then?
[/quote]
DI
HALT
Is a sure way ... -
SpecEmu 2.1 betaFinally I think I've cracked all the gory contention details required by those trendy multicolour demos (48K/128K modes only, +3 contention can wait …
... of which is contended, and another is non-contended, entire instruction is ... itself is located in non-contended memory, I can not ... instruction is located in a contended memory, I find that not ... itself is executed from non-contended memory: in my opinion these ... -
SpecEmu 2.1 betaFinally I think I've cracked all the gory contention details required by those trendy multicolour demos (48K/128K modes only, +3 contention can wait …
... itself is executed from non-contended memory: in my opinion these ... /> Actually, port 7ffd is *not* contended, despite previous assertions that it ... looks like an address in contended memory to the ULA... the ... as I/O operations are contended on T2, not T1 ( ... -
MC 101Hello Group Members: Can't spectrum MC be embedded in a BASIC program
... between 16384 and 32767 is contended, meaning the ULA and Z80 ... -
Problem with RealSpectrumWhy am I having difficulty getting certain games to laod in RealSpectrum? The game seems to be loading ok then the screen goes black and nothing hap…
... first "[B]110[/B]% exact contended memory and multicolor emulation!" -
Another Z80 processor questionOK, this time this isn't clearly covered in the FAQ, as far as I can see.... Suppose we have the CB instruction "SET b,r" (b=bit, r=register (differ…
... ultra-precise stuff (floating bus, contended memory), but I want to ... -
Game loop design?Having some thoughts on how to design the game loop and could do with some hints and tips from folks who have done it before! It's all about how to …
... 'proper' code as CALL draw_screen \ HALT \ JR halt_inst \.
The ... proper program
jump to HALT instruction
reenter IM2 vector ... -
Collision DetectionHi everyone, This is my first post on WOS. Like most people here I owned a Spectrum when a teenager. At that time I was quite heavily into programmin…
... the IM2 interrupt (using the HALT command)
Paint the offscreen ... -
A few questions regarding EmuZwinI had posted this in the development forum and then remembered there was an emulators forum, so apologies for the repetition. 1. I have been trying …
... have something to do with contended memory, but don't know ... 's almost certainly due to contended memory. See the CSS FAQ ... -
need help with speed optimization. this procedure draws a sprite with mask from memory onto the screen with x-coordinate in pixels. it doesn't shift sprites in realtime, it just uses …
... for sprite drawing
HALT
CALL DRAWSPR ;Call sprite ... -
Interrupts details questionSuppose I am writing a game and I want to use interrupts to measure time, draw the screen without flicker, maybe to poll keyboard etc. What kinds of …
... might simultaneously access is called 'contended memory' and a detailed description ... the FAQ.
This contended region is not limited to ... -
If there's ONE thing that......frustrated you about the spectrum when you were a kid (not now) what would it have been? 1) The attribute colour problem 2) The sound 3) The size…
What *Should* Have Been the Last Game to Be PublishedHi All, Inspired by the the thread about the last public/official/etc. Spectrum game, in your opinion, what would have been the ultimate (no hint in…
... the Spectrum. Why call a halt, and put a full stop ...Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …
... at #6000, which is in contended memory, and this will have ...Techy Z80 questions****** Question 1 ****** Take the instruction SET b, (HL). This is broken down (in machine cycles) as follows (according to Microprocessor Technolo…
... ? Reconstructing the breakdown from the contended memory timings in the FAQ ...Techy Z80 questions****** Question 1 ****** Take the instruction SET b, (HL). This is broken down (in machine cycles) as follows (according to Microprocessor Technolo…
... the data bus and is contended in a 3,1,1 ...Wanted: Code to wait until Border has been drawnWhen my IM2 interrupt fires, I want to wait until the ULA is past the first line of display before drawing. I know I need to wait about 14300T after…
... can do this either with contended memory (trivial), or by executing ...Can Anyone explain sprites in Jet Pac/Atic Atac etcJet Pac was 16k, and yet the sprites were impressively fast. I notice they had a slight flicker at times, but were notmally pretty flicker free. W…
RZX for Sabre WulfI was just about to send an RZX for Sabre Wulf to the RZX Archive when I noticed they don't accept Ultimate's (and other companies' who haven't given…
... got the whole issue of contended IO timings to deal with ... less researched and emulated than contended memory timings.Cobra - scrollingHi everyone, I have been studying some of the code in Ocean' Cobra game using a debugger, in the hope of improving my own scrolling routines. In cas…
... this way, though; just doing HALT would have the same effect ...
