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A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…
... the time of the next interrupt.
If you want ... own stack-safe tile-drawing routine. But you may end up ... -
A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…
... executed by the engine initialization routine.
Although there's ... frame).
//
// If an interrupt occurs while certain routines are ... at an incorrect location
// (routine NIRVANA_sprite).
//
// HALT can ... -
Small demo to show my sprite engine for ZX Spectrum 48KThis demo shows 13 sprites moving at 50fps totally flicker free: 12 enemies bouncing in edges and the main character, controllable with OPSA (note S …
... engine is a very fast routine that prints pre-shifted sprites ... little more tricky for traditional interrupt-driven engines. All you need ... from the beginning of an interrupt. -
IX register - using/problemsAre there any rules on using the IX register? Are there any restrictions on the memory locations that it can access? Yes, I know it's slower than us…
... 257 bytes plus whatever your Interrupt Service Routine itself takes. -
IX register - using/problemsAre there any rules on using the IX register? Are there any restrictions on the memory locations that it can access? Yes, I know it's slower than us…
... 257 bytes plus whatever your Interrupt Service Routine itself takes.[/QUOTE]
IX register - using/problemsAre there any rules on using the IX register? Are there any restrictions on the memory locations that it can access? Yes, I know it's slower than us…
... 257 bytes plus whatever your Interrupt Service Routine itself takes.[/QUOTE]
A "generic" loader for +3(e)I've made this loader for 128k games in +3DOS. [CODE]dos_open equ 262 dos_close equ 265 dos_abandon equ 268 dos_read equ 274 dos_write equ 277 dos_s…
... given length (to put that routine inside BASIC). I'm doing ... exactly the same size. The routine works by creating a 1 ... use IY, but the maskable interrupt does, so I would draw ... on page 222. The maskable interrupt uses IY to update FRAMES ...Getting aquainted with the IF1bisToday, fifteen days after dispatch, the IF1bis arrived at my door. In perfect order. No customs, no TVA and no handling fee involved. The arrival of …
... existing key scan routine that runs every Interrupt, is extended ... decreased by 1 every Interrupt. When the counter ... /> ORG dump1 ;destiny for this routine
;-----------------------------
...Pseudo-3D map renderingHave been mulling this over for a while, until that isometric thread prompted me to ask. I'm not sure if this is officially classed as 2D, 2.5D, or 3…
... 's it! Alter the draw routine and only draw chars where ... and not synchronising to the interrupt?
(Sorry might be ...****ing Awesome Spectrum Engine (FASE)This is a new engine (sprites, tiles, map) for all ZX Spectrum machines. The engine set ups a runtime enviroment that leave between 24K and 30K byt…
... decrunch routine
feff-ff00 always ffff for im 2 interrupt
routine
fff4-fffb short interrupt code
fffc ... jp to frame routine
fff4-fffb short interrupt code
fffc ...Game loopJust working on my first ever Spectrum game, and am struggling to work out what the game-loop should look like. I've got interrupts enabled (mode 2)…
... the very first 'clear_sprites' routine actually draws them on the ... screen, and then the draw_sprites routine clears them off (unless ... /> draw_sprites
halt ; wait for interrupt to occur
clear_sprites
A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…
... : Computer will crash if an interrupt occurs during execution!"
as ... must be at least one routine for printing with enabled interruptsA new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…
... : Computer will crash if an interrupt occurs during execution!"
as ... must be at least one routine for printing with enabled interrupts ... images move around. If an interrupt happened while executing them, players ...Why are multicolour engines only able to be made now?Now I'm no programmer, but, how come multicolour engines are only being created/designed now? I know there were Rainbow Graphics used in games in the…
... the moment the Speccy's interrupt function triggers, you have effectively ... screen.
The colour routine has to synch itself to ... exactly, so that the colour routine that follows it always starts ... case you may switch the routine off after the top 2 ...How to print logo onto screen at chosen coordinates?Hi, I've just got back into zx spectrum games after all these years and after seeing some of the great games on here I would like to start learning p…
... etc, nice and simpler routine for a beginner :-)
Where it ...How to print logo onto screen at chosen coordinates?Hi, I've just got back into zx spectrum games after all these years and after seeing some of the great games on here I would like to start learning p…
... etc, nice and simpler routine for a beginner :-)
Where it ...Timex video mode & SamCoupe sound chip.Hi, people! I propose a solution which allows to use sound chip SamCoupe SAA1099 jointly with computers Timex 2048/2068. Everyone knows that these de…
... modes.
Music routine for SAA soundchip is very ... is call under interrupt 50Hz. After interrupt ULA generate top ... If SAA music routine will called after interrupt and return before ... each return from music routine(music routine may contain this OUT ...Timex video mode & SamCoupe sound chip.Hi, people! I propose a solution which allows to use sound chip SamCoupe SAA1099 jointly with computers Timex 2048/2068. Everyone knows that these de…
... modes.
Music routine for SAA soundchip is very ... is call under interrupt 50Hz. After interrupt ULA generate top ... If SAA music routine will called after interrupt and return before ... each return from music routine(music routine may contain this OUT ...Venturespeak Helplooking at the code from ZX Computing, October, November & December 1986. How do I make the code do more then 3 letters say 5. and could it be made …
... Machine Language for the Absolute Beginner (William Tang)
* Understanding Your ... would be to rewrite the routine for you.
If ... be merged into a single routine which handles arbitrary length keywords ...Using the stack to blit bufferI was using a ldir to blit my back buffer to the screen RAM, and it was working pretty well if not rather slow. After reading about using the stack …
Are you doing your blitting immediately after a HALT or in you interrupt service routine? If not you are probably modifying the screen as it is being drawn, resulting in tearing.Tile routinesHi all, Please does anyone have any examples of tile routines in pure asm to set up maptile screens. I would like to try and understand them and ti…
... time to write the sprite routine - start out by using preshifted ... the best idea for a beginner. Get a handle on the ...Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... even better indication. My alignment routine runs a tight 8 t ... (hl) and records after each interrupt the lowest bit of the ...Help with 1-bit sampled soundHi all, I've been sent over this way from the CPC Wiki forums as you guys may be able to help me more specifically with a programming query. Firstly…
... which means your playback routine must be T-state counted ... playing samples via interrupt unless your interrupt can be programmed ... time intervals before or after interrupt. The before happens when ... few games tried to play interrupt driven beeper tunes. They ...Cybernoid POKE required.Ummm, I'm not absolutely sure this is the right place to post this, but is there a POKE to remove the music from Cybernoid 128k? I still want to kee…
... then point to the interrupt service routine. Somewhere in there ... of the music initialisation routine, which will probably be ... immediately before the play routine called by the instruction ... interrupt-driven music half-way through and not knowing which routine ...FZX: a new standard format and driver for proportional fonts[B]FZX[/B] is a very compact and efficient (although extremely flexible and powerful) standard format to create new fonts for the ZX-Spectrum. It sup…
... . If an interrupt occurs while running this routine, and this interrupt accesses the ... , temporarily changing IX inside this routine should have no side effects.FZX: a new standard format and driver for proportional fonts[B]FZX[/B] is a very compact and efficient (although extremely flexible and powerful) standard format to create new fonts for the ZX-Spectrum. It sup…
... . If an interrupt occurs while running this routine, and this interrupt accesses the ... , temporarily changing IX inside this routine should have no side effects ...FZX: a new standard format and driver for proportional fonts[B]FZX[/B] is a very compact and efficient (although extremely flexible and powerful) standard format to create new fonts for the ZX-Spectrum. It sup…
... If an interrupt occurs while running this routine, and this interrupt accesses the ... changing IX inside this routine should have no side effects ... for the video display routine you can't use ... or writing your own video routine, which will probably mean ...Address bus contents (i.e. PC) during execution of HALTI'm wondering if anyone can tell me what's placed on the address bus during execution of HALT, beyond the initial M1 cycle. The Z80 user manual state…
... /> [QUOTE]The enable interrupt instruction sets both interrupt enable flip flops (IFFI ... , allowing recognition of any maskable interrupt. Note
that during the ... RETI from the present interupt routine.
Interupts will stay ...Address bus contents (i.e. PC) during execution of HALTI'm wondering if anyone can tell me what's placed on the address bus during execution of HALT, beyond the initial M1 cycle. The Z80 user manual state…
... RETI from the present interupt routine.
Interupts will stay ... 's surely quite possible to interrupt the Z80 with PC pointing ...New bicolour game: El Stompo.Phew! Finally finished my first game using Einar's fantastic Nirvana engine. [B]El Stompo.[/B] [IMG]http://i1142.photobucket.com/albums/n608/davey…
... using a per-screen-line interrupt to modify the palette, ... line. Dominic Robinson published his routine in Your Sinclair magazine. ... published an editor and routine that could do per- ... looking at interleaving a scrolling routine with a multicolour engine, ...
