-
Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …
... /> CALL PrintInitMessage
CALL Delay
LD HL,INITIALSEED ... />
CALL InversionFillRoutine
;Delay for around 5 minutes
; Simplified version of library routine
; This version - no ... -
Atic Atac speed.Dear all, Excuse the noob question, but does anyone know how fast Atic Atac runs at? What I mean is, frames per second, or the amount of pixels the…
... better off using the HALT. I've done loads ... you are better using Halt and interrupty things![/QUOTE ... for the tip, superficially HALT/interrupts does seem easier ... br /> Even though I used HALT in the game I mentioned ... set up an IM2 mode routine - maybe I will ... -
Analogue BeeperThere's been a discussion on foro.speccy.org about multichannel beeper stuff, and since I had the camera out and the scope set up, I set about demons…
... my very, very crude routine that makes the wave ... ld a, (hl) ; get delay value
and a ; ... br /> ld b, a ; delay count
xor a ; ... delay1 djnz .delay1 ; zero level delay
inc hl
... .delay2 djnz .delay2 ; and delay
inc hl ; next ... -
Speech reproduction on the Speccy - 2009 style?Thanks to Chapter 33 of [url="http://www.worldofspectrum.org/infoseekid.cgi?id=2000388"]Super Charge Your Spectrum[/url] by David Webb - "Speech Repr…
... sine wave. The asm routine I used is there.
routine. You need SDL to ... stereo).
The routine could be made more efficient ... in memory as this routine can manage). But I ... to do than refine this routine.
You ... -
Analogue BeeperThere's been a discussion on foro.speccy.org about multichannel beeper stuff, and since I had the camera out and the scope set up, I set about demons…
... correct - the more complex the routine, the smaller amplitude you can ... really simple routine, it can run fast, and the minimum delay is ... vice versa. The longer your routine takes to run, either the ... -
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…
... buffer filled by the interrupt routine).[/QUOTE]
I think ... enters the key repeat start delay and doesn't bother checking ... means to type normally the routine needs to see a key ... -
Detecting Spectrum modelsIs there any sure-fire way a program can detect the model of machine it's running on (48K, +, 128, +2, +2A, +3, clones) even when running in the 48K …
... two versions of my sprite routine - one for drawing on interrupts ... when I'm using the delay loop to copy data to ... -
New game: Nanako Descends to HellJust a bit over two weeks after their first game, The Mojon Twins strikes again with a new game for Spectrum 128k and Amstrad CPC: [url]http://www.m…
... call.
A delay() function (courtesy of Jan Bobrowski ... you better control over delay timing rather than use ... in_Wait() and in_Pause() use delay() as well but accept ... (61440 - 61696)
// Copies generic routine (61937 - 61948)
... -
New utility - Arcade Game DesignerNo income tax, no VAT, no money back, no guarantee... In advance of SEUD's release I thought I'd release AGD to get people in the mood for game maki…
... is much easier. Put a DELAY 2 in one of the ... events. DELAY 1 won't always work as the synchronisation routine will ... -
!!! Trdos Emulation On Zx !!![B]This is software emulator of TRDOS(betadisk). Yet is writed only for interface MB02+, but will ported to more other IDE interfaces with external r…
... is paged, one LED indicating HALT instruction and another LED for ... what page is AY music routine, where is the main code ... -
Reading from the 128 Serial PortDon't shout at me if this is a silly question. I have Googled extensively, and searched the forums, but I can't find anything discussing what seems t…
... , 2 stop bits.
The routine waits for the PC to ... -
Question about ZX Spectrum AY interfacesI got this information from Mike, author of EigthyOne: [QUOTE]128k spectrum 1.7734 MHz Timex 1.764 MHz ZON-X 1.625 MHz Fuller 1.625 MHz QuickSilva 0…
... processor time, so the Z80 routine's execution speed is not ... a 50Hz interrupt with fiddly delay loops).
One thing ... -
The So What's This Buzzsaw All About Then? Thread.Erm. This: [URL="http://www.joefish.co.uk/speccy/Joefish_Buzzsaw_Demo_1.tap"]http://www.joefish.co.uk/speccy/Joefish_Buzzsaw_Demo_1.tap[/URL] Keys…
... , as that tells me the routine is getting ahead of itself ... delays for starting the colour routine. The first three then use ... the same routine that takes (I think) 215 ... sure if tweaking the initial delay will be enough. I may ... -
wavide: WAV player for DivIDEPrompted by an email from zxbruno yesterday, cobbled together much quicker than expected... [url]ftp://ftp.untergrund.net/users/gasman/zx/wavide/[/u…
... a multiple sector read (the routine requests 256 sectors at a ... a few t-states of delay, so I can catch this ... -
Has any programmers recently pushed the spectrum to the limits?Hi there. Ive just discovered this great forum and I was brought up with the speccy 16,48 and then 128k. Im just wanting to know if there are any re…
... /> LD B,L
TSLP3 HALT ; Hang around, modifying the instructions ...
LD BC,021AH
DELAY DEC BC
LD A ... /> OR C
JR NZ,DELAY
nop
nop ... -
New BUZZSAW+ Demo, No.2OK everybody, here's the latest demo of [I]Buzzsaw[/I]. This includes the title screen I wrote in Corfu with control selection, some new sprites and…
... you can rewrite your sprite routine to be more intelligent and ... lot of time on read_keyboard routine (its terrible, if i understand ... see you have a small delay loop there.
all ... -
New BUZZSAW+ Demo, No.2OK everybody, here's the latest demo of [I]Buzzsaw[/I]. This includes the title screen I wrote in Corfu with control selection, some new sprites and…
... can use a bit slower routine for drawing (say 10-11 ... been displayed. That little loop delay is typically less than it ... -
Ahh.. the tape loading era! by ate bit[url]http://www.pouet.net/prod.php?which=53846[/url] It is UNBELIEVABLE!!! Effects while loading, MUSIC while loading (and loading normal speed !!!…
... ". If you replace that simple delay with something more interesting.. well ... the demo! So the music routine has to fit inside 358 ... -
Ahh.. the tape loading era! by ate bit[url]http://www.pouet.net/prod.php?which=53846[/url] It is UNBELIEVABLE!!! Effects while loading, MUSIC while loading (and loading normal speed !!!…
... divide time between the music routine and tape loading. (Well, that ... flicker (normally you'd use HALT to synchronise with the screen ... -
The Goldfinch updates thread([url=http://www.worldofspectrum.org/forums/showthread.php?t=25034]original announcement thread here[/url] - I figured it was worth starting a new to…
... 're absolutely right! Adding a delay loop has fixed it. What ... sufficient time to run this routine and a few other instructions ... -
I just picked up a free Atari 520stJust got a free 520ST, (no cables or leads) and a small box load of games. :? dunno what to do with it, but it was being thrown out, so I grabbed it…
... you do it after a delay instead of on the raster ... of a screen-copying-scrolling routine. It wasn't at 50Hz ... -
I just picked up a free Atari 520stJust got a free 520ST, (no cables or leads) and a small box load of games. :? dunno what to do with it, but it was being thrown out, so I grabbed it…
... you do it after a delay instead of on the raster ... of a screen-copying-scrolling routine. It wasn't at 50Hz ... -
Framerate of Spectrum gamesI was reading a bit about framerates in modern games and it got me wondering about the Speccy. First off I'd hoped to find what framerate my old gam…
... have to add an extra HALT in 'cos 50fps is too ... some 'macho' reason the plot routine is rather fast table based ... in the end adding a HALT instruction was the best solution ... -
Adjusting your code for screen refreshingOk, I'm aware that I should know it already after writing 5 Spectrum games in machine code but interrupts and screen refreshes were always my weaker …
... than 1 frame.
halt maybe messes up your timing ... only does part of the routine every frame and over a ... -
Adjusting your code for screen refreshingOk, I'm aware that I should know it already after writing 5 Spectrum games in machine code but interrupts and screen refreshes were always my weaker …
... end of your main routine immeidately BEFORE the HALT statement so that ... . so that immediately after the HALT you can do a simple ... your precalc time (before the HALT) is sort your sprites into ... -
Adjusting your code for screen refreshingOk, I'm aware that I should know it already after writing 5 Spectrum games in machine code but interrupts and screen refreshes were always my weaker …
... ;allow interrupts (normal = IM1)
HALT ;does make the test!
routine.
-------------------------------------------------------------------
For testing ... screen memory after issueing a HALT
for synchronizing, how ... -
Adjusting your code for screen refreshingOk, I'm aware that I should know it already after writing 5 Spectrum games in machine code but interrupts and screen refreshes were always my weaker …
... set, instead of issuing a HALT. If your precalculations take a ... 50fps ;) then have your interrupt routine decrease a framecounter, setting bit ... build that into your sound routine so you do something useful ... -
Games that could've been goodI've just been playing [url=http://www.worldofspectrum.org/infoseekid.cgi?id=0009311]Blade Warrior[/url] (it's been deniencededed since I got hold of…
... were compressed etc. hence the delay for decompress etc :)[/QUOTE]I ... -quick - a custom quadrilateral-fill routine could be quicker - but it ...
