-
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…
... memory and ldir the whole screen memory - all you have to ... on the correct place on screen
When the sprite ... and store a new "stripe" (row or col) of background graphics ... stripes being stored every 8th pixel horisontally or vertically.
Pixel setting / general speccy codingi just started doing some cross-coding with the [url="http://www.bigfatpanda.fsnet.co.uk/z80.html"]Z80 SNA assembler[/url] and an emulator, and this …
... ; A returns pixel point
EX DE,HL ; save address
LD ... DE,HL ; get address
XOR (HL) ; reset pixel
LD (HL ... ),A ; put back on screen
RET ...Pixel setting / general speccy codingi just started doing some cross-coding with the [url="http://www.bigfatpanda.fsnet.co.uk/z80.html"]Z80 SNA assembler[/url] and an emulator, and this …
... for obtaining the address of the start of a screen line is ... adding that onto the line address.
As a rule ...
This assumes the pixel table doesn't cross a ... />
If you place the pixel table right at the beginning ...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 …
... was the information from the address 16384-23296 accessed ?
... while the refresh of the screen happens ?
pixel screen - right border for every pixel line (one ... this time (drawing pixel part of screen, not left/right ...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 …
... on to the next 8-pixel group
call label2addr(unscrambleHL ... effectively "linearizes" the address space of a screen third.
unscrambleHL:
; the infamous trick with address space wrapping.
.anchor($fff4 ...Why relativly bad colour on Spec compared to other 8bit?Why relatively bad colour on Spec compared to other 8-bit machines like the Master system or even c64? I understand the 8x8 block that you could hav…
... command line program to put screen$ together so I could ... display a full screen if only using 2 screen$ but that ... how to build each screen to get the right ... using 1/3 of the screen approximately to have anything ... 8*1 and any pixel in this row of 8 pixels ...8 BIT WARSwhen 8bits ruled the home market Speccys, C64 and Amstrad were the big 3 fighting it out for supremecy.... but they didnt survive which as we know wa…
... hardware scrolling. The display address is formed from on offset ... can achieve pixel perfect scrolling by literally moving the screen on ... coders staple, moving the screen in a very smooth sine ... analogue response to changes in screen position.
You ...If you could re-design the Spectrum...Let's suppose you could go back in time to the beginning of the Eighties. The Spectrum is being designed as the revolutionary successor to the alread…
... provide support for the new screen modes in BASIC, and handle ... management (i.e shift the address of the BASIC and variables ... in the 64x24 mode (512x192 pixel). Basic64 is a sw program ...Spectrum programmingI have a Spectrum+ at home. I tried to write some programs in BASIC (IIRC i wrote a breakout clone in which you had to hit those spider-like characte…
... in the byte representing a pixel) but the layout is not ... that if you stored the address in HL then an INC ... to HL. This produces several screen segments that are 64 lines ...128k Shadow Screen?When emulating the shadow screen in bank 7 should that bank be switched into address C000? If so, what happens if bank 7 is switched out without canc…
... a LD from a memory address takes at least 7 tstates ... load a screen attribute byte and a byte of pixel data in ...128k Shadow Screen?When emulating the shadow screen in bank 7 should that bank be switched into address C000? If so, what happens if bank 7 is switched out without canc…
... 's coming in on their address lines. You could happily swap ... are basically determining how the address buses are conncted to each ... a LD from a memory address takes at least 7 tstates ... load a screen attribute byte and a byte of pixel data in ...New Compo IdeaI've had this idea and would like to know what do you think about it. I think that most of us here know how to code in BASIC. The problem with Specc…
... t waste your nice loading screen) you can use this ... can read them in a SCREEN$. [Dr. BEEP]
* ... is placed on the screen then use a different ... be sent to the TV screen.
Bit 5: Any ...
Keeps track of the address on the machine stack where ...z88dk+splib2 sprites question.I'm creating a game and I have several "states" for my main sprite, such as jump, facing left, facing right, etcetera. All those states require a dif…
... />
// currentFrame always holds address of current sprite graphic used ... (game_on) {
// update screen -- everything drawn at once
row, col, cpix, rpix);
...sprite making in +3 BASIC?Any sprite tutorial I come across is far too complicated! Can someone help me? For instance, how do you create a person-shaped animated sprite which …
... use machine code to do pixel perfect sprites.
You ... you can change the address of where the UDG' ... detection, but convert it to pixel numbers.
eg. take ... You now have the pixel position of the sprite that ... sitting on a character row and is only moving ...z88dk+splib2 sprites question.I'm creating a game and I have several "states" for my main sprite, such as jump, facing left, facing right, etcetera. All those states require a dif…
... 'm using 3 enemies per screen).
[/quote]
screen rectangle sp_ClipStruct) so using ... up since that extra row/col of the sprite ... (nor the 7 blank pixel rows above each column). ... one and the empty row at bottom will not ...z88dk+splib2 sprites question.I'm creating a game and I have several "states" for my main sprite, such as jump, facing left, facing right, etcetera. All those states require a dif…
... sprites and graphics primitives. Every pixel can be any colour. ... , what's already printed on screen also changes.
[/quote ... is inside sp_UpdateNow when the screen is drawn. Whatever the tile ... store an entire Spectrum-size screen in memory (6912 bytes) ...z88dk+splib2 sprites question.I'm creating a game and I have several "states" for my main sprite, such as jump, facing left, facing right, etcetera. All those states require a dif…
... sprites and graphics primitives. Every pixel can be any colour. This ... mean adding native support for pixel*pixel scrolling? Whoah man - that will ...OT: Graphic Card problemAhem. It's me again with a computer problem! Last time I posted with a problem I was pleasantly suprised with some insightful answers that helped fix…
... hardware acceleration. The boot screen is also corrupted. I ... because a row of discoloured pixels dance along the screen. However, ... windowed mode but enabling full screen spoils the party.
... once read about malfunctioning pixel pipelines and am hoping it ...The ULA and ScreenI've asked something similar before but please bear with me. I'm trying to understand the way the screen is controlled. The ULA controls output to …
... 8 times - one for each row? I can see why it ... mode - where any pixel on a 256x192 screen could take on any ... colours - still 2 bytes per row of 8 pixels. I suppose ...Timex 80 column display driverI subsequently wrote an 80 column font driver for 512x192 mode.
... hl,(nextdfile) ; hl = destination dfile address
ld b,8 ; char ... />
ld a,(hl) ; a = screen byte
and #c0 ; keep ... be better to update the row,col position AFTER the char ...TommyGun 0.8.5 available0.8.5 has been uploaded release updates include: * Heaps of bug fixes :) * A getting start guide on how to use TG Please try it and give me your f…
... different colours. Physically the screen draws a pixel for every available bit ... . (see readme.txt for email address)
Everybody:
address in the readme.txt.
Shoot-em-up Development UpdateHi Folks, I am still working away at my horizontal scroller. Here is a link to let you see progress. I have re-written the scrolling routine to make…
Yes Rob, the screen is cleared and only ... br /> ; SCROLLING ROUTINE WITH 2 PIXEL PRECISION
;==============================================================[/FONT]
...
; Do first tile in row[/FONT]
[FONT= ...z88dkHello. I'm an spanish user of spectrum (and naturaly of this page). I have a question. I want to start to program games with z88dk, but I need a goo…
... that I sometimes store pixel info and attr info ... pixel info in column major order and the attr info in row ... colour sets in the screen$. Then I would ... attr definitions from a single screen$.
... from the screen$ independently and in row major order.< ...z88dkHello. I'm an spanish user of spectrum (and naturaly of this page). I have a question. I want to start to program games with z88dk, but I need a goo…
... up a sprite in row-major order (ADBECF in ... around the screen, like regular sprites are, to pixel precision. The ... , just colouring from a row-major ordered array of ( ... - There must be a blank row at the bottom of sprite ... usually have a blank row at its end which ...Wanted: Game Ideas!Ok then here goes nothing. I'm a reasonably good programmer, but I'm really no good at coming up with game ideas and graphics. So if any of you have…
... Up to 256 unique 8x8 pixel background tiles can be displayed ... ).
- Screen graphics could be stored as ... edge of the screen. An entire screen could be called ... things are going on on-screen.
- ... so hours in a row to get it right. ...ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... />
sp1_UpdateNow(); // draw screen now
for ( ... ->row > 21) // if sprite went off screen, reverse ...
;GRAPHIC DATA:
;Pixel Size: ( 16, 24)
;Char ...ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... char within same sprite in row major order (MSB = 0 if ... column, bit 5 = 1 last row, bit 4 = 1 clear pixelbuffer ... - this contains the sprite frame address and a vertical rotation offset ... draws the graphics in the pixel buffer and returns to sp1_UpdateNow ...ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... several different sprite types on screen.
2A-2C Illustrate ... see that the blank row at the bottom of ... (and the blank 7 pixel rows above the first column ... and alters the blank row below each column to the ... a mixture of sprites on screen all at once. This ...ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... takes to draw one 8x8 pixel sprite character. This figure ... s->row > 21) // if sprite went off screen, reverse ... is already in the pixel buffer. The pixel buffer's initial ... the sprite into its 8x8 pixel characters and creates a ...ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... properties means each individual 8x8 pixel sprite character making up a ... to sp1_Invalidate() invalidates the entire screen, using sp1_ClearRectInv() makes little sense ... ;s->row > 21) // if sprite went off screen, reverse direction ...
