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Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…
... could go for even faster routine at the expense of size ... bytes.
[CODE]
delay xor a ; 4
or ... -
How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…
... performing the sprite clear/redraw routine and change it again AFTER ... HALT to wait for a TV vertical retrace, get the interrupt routine ... than a generic CALL scr_down_line routine etc. Move sprites can be ... able to skip the undraw routine and eliminate flicker -
Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…
... could go for even faster routine at the expense of size ... bytes.
[CODE]
delay xor a ; 4
or ... -
Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... {
scroll_message();
#asm
halt
#endasm
} while (!in_Inkey ... where exactly to put the halt statement and how to get ... a little on sending the routine signals like starting and stopping ... -
Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... exactly to put the halt statement and how to ... at address 0xd4d4 (interrupt service routine entry)
wpoke(0xd1d2, ... () is running in the interrupt routine
[/code]
routine scroll_isr().
... -
Preferred way of determining Y co-ord in assembly?I know of 2 ways of calculating the y-cord of a pixel row for the speccy in assembly. One is to calculate the address by ways of shifting and masking…
Apologies in the delay in posting my routine but after seeing the ... br /> [/code]
The routine plot finds the y-coord ... wrong it appears because the routine fails after crossing the top ... the meantime here is the routine anyway.
BTW, ... -
68000 programming.Anyone here know anything about this? My question is: how does the programmer know how long hisinstructions are? Do determine the operands to branch …
... which starts at 1000. This routine does this:
[code]< ... 0000
0004 7402 hlt ;halt processor.
0005
... #9,D0
TRAP #15 Halt Simulator
END START ... of a mistake in the routine for handling indirect addressing. Can ... -
Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
... avoided by starting the analysis routine like this:
[CODE ... 1 and 2), so the routine to print the entire board ... don't think the extra delay beween player input, and board ... pieces on it, and the delay has increased).
[QUOTE ... -
Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
... don't think the extra delay beween player input, and board ... pieces on it, and the delay has increased).[/QUOTE]
This version uses the same routine to show the updated board ... each move, and then this routine is called again (one last ... -
The direct bus or indirect one... that is the questionThe Ethernet project continues...and I'm in a quandry. So I've managed to implement enough socket library for the W5100 that socket, bind, listen, a…
... a 5 to 10 nanosecond delay which shouldn't hurt anything ... DivIDE traps the interrupt service routine and I'm just set ... -
New oneliners for 2008[INDENT][INDENT][INDENT]Here's my attempt at a first-person-perspective 3d game in one line of BASIC. It's called 'wormhole', and you've got to get t…
... line with my previous PRINT routine. Still I somehow have buttons ... is also used for the delay between turns. I just realised ... delay. That is simple to fix.
(3) My original routine ... -
Dangerous Z80 Assembly CommandHave been reading Toni Bakers' "Mastering MC On Ya Speccy" book and came across the list of Z80 commands in the dictionary section. Page 102 "[b]IM…
... in the foreground, using the HALT instruction, like this month's ... works:-
The chip music routine when run in the foreground ... /> Any simple IM 2 interrupt routine I write myself (like manipulating ... to BASIC succesfully if the routine has been run without ... -
CSSCGC 2008 has now officially begunFor coming last in the 2007 crap game compo, I have the honour and privilege of hosting CSSCGC 2008! I have now put up the CSSCGC 2008 website at …
... eliminated the delay by replacing this with a machine code routine that ... same thing. The m/c routine plots a hundred random stars ... -
Quick q. on MC vs. BASIC (boring question)No matter how long or tedious the programming/testing may be ... Is Machine Code [B]ALWAYS[/B] faster than BASIC?
... .org/wiki/Quicksort]quicksort[/url] routine, but I wrote a [url ... doesn't provide a sort routine at all so I can ... add as much NOPs, HALTs, delay loops or any other useless ... -
Disappearing/appearing effectI remember doing a small routine in BASIC which could be used to cover the attributes section randomly, until all 704 characters were filled with the…
... higher memory.
This routine requires 1536 bytes for the ... drawback is the 14 second delay while the arrays are being ... -
MB02+ software and system developmentsThe following text was (before last modification) first published here: [url]http://www.sintech-shop.com/forum/board.php?boardid=20[/url] As discuss…
... port.
ei
halt ;wait for interrupt (for correct ...
atfer return this routine:
- set flag NZ ... -
JSW... how does the game "finish" in assembly?It seems the ZX and C64 versions of Jet Set Willy suffer from the same "unfinishable" problem. Thankfully the ZX version has been patched with pokes …
... ]
Sorry for the delay! I've failed rather miserably ... X and Y coordinates = whatever) routine that changes the toilet sprites ... -
Start Tape, Press any key...Hi, I'd like be able to save (program or data or code) using the save "whatever" command, but I want it to start recording immediately, rather than …
... (called by the SAVE routine at $0971) points by ... at $15AF. The input routine points to $10A8 and ... the output routine points to $09F4.
routine - not the output routine as mentioned ... edit 3 about the delay between the header and ... -
How do you make AY sound?Are there tools? Or is it all done in assembler? Any tutorials around for people who like things explained in simple terms? Ta!
... tapefiles and call the player routine once every interrupt to play ... the required machine code (using HALT) that you could you use ... to use an IM2 interrupt routine eventually so that you can ... -
RZX Player interface - Possible?If I have a Mass Storage interface and some media (CF, SD) with a couple RZX files, what would I need to play them on a real Spectrum? If the RZX fil…
... combination when (if) the interrupt routine is run so that the ... doesn't do its interrupt routine. Then when the RZX recording ... the data following the interrupt routine for the current frame and ... the instruction count is to delay when the z80 begins executing ... -
'orange' on a spectrumalways wondered why spectrums could never seem to achieve the colour orange? wasn't one of the default colours, and don't remember seeing anything th…
... out of whack on this routine I briefly wrote - but it ... /> ; wait until next frame
halt
; Restore bit 3 ... /> ; wait until next frame
halt
; Check for 'q ... -
'orange' on a spectrumalways wondered why spectrums could never seem to achieve the colour orange? wasn't one of the default colours, and don't remember seeing anything th…
... .
(There is a delay of two seconds between pressing ... my slow decimal to binary routine - this routine is illustrative, but could ... -
VIC 20 emulation on the SpectrumI'm sure most people are aware of the my attempt at bringing the full Commodore experience to Sinclair users with the "Twenty Commodes" program. It e…
... 'd have to adjust the delay loop.
My high ... EQU $FFE4
; init routine
ORG 5120
VIC 20 emulation on the SpectrumI'm sure most people are aware of the my attempt at bringing the full Commodore experience to Sinclair users with the "Twenty Commodes" program. It e…
... nybbles. :D
Shorter delay loop when worm is turning ... EQU $FFE4
; init routine
ORG 5120
In-game music takes CPU time?If a 128k wants to have music played in-game using the AY sound chip, does that consume a lot of CPU time? What I am after is if the reason why man…
... of my games using a HALT at the end of each ... handled inside the interrupt service routine or simply part of a ... speed is controlled by a HALT instruction is academic.ZX Spectrum (16K) sound/beepHi all, I think I'm in right place now, I've tried to find an answer how to generate two channel sound using ZX Spectrum 16K. Only think I've found …
... a given note. In the routine in Spectrum's ROM, ... br /> SUB C ; Subtract delay from 16.
LD B ... br /> SUB C ; Subtract delay from 16.
LD B ... br /> SUB C ; Subtract delay from 16.
LD B ...CSSCGC 2008 has now officially begunFor coming last in the 2007 crap game compo, I have the honour and privilege of hosting CSSCGC 2008! I have now put up the CSSCGC 2008 website at …
... ]I might steal your input routine.[/QUOTE]
Yes, please ... />
There is a longer delay between notes on the righthand ...Keyboard routinesI'll ask here first - since this must be a long-ago solved problem, and hopefully I can avoid re-inventing the wheel... I need a keyboard routine th…
... now realised that the ROM routine is actually quite good. Unfortunately ... to get a good keyboard routine. There is no other way ... one with a simple CPU delay, but the results aren't ...
