-
Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…
... is decreased more with simpler vertical movement (including the attributes).
code itself). That's why cool ... repeat). Now write me some code for the same task on ... -
Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…
... /DEC IYH in the ROM code.
[QUOTE=Alcoholics ... br />
Now about your code
[QUOTE=Alcoholics Anonymous;511112 ... how come your row-crossing code takes only
[QUOTE= ... the universal routine for any vertical shift)
(aligned and/or ... -
A video interface for the Spectrum, MSX compatibleSo you can use the same code for displaying sprites, tiles, characteres, and so no, on both the Spectrum and the MSX. That is, the Spectrum now has a…
... .
[*]V9958 has horizontal hardware scroll, and most importantly: a few ... , to analyze it and find code that should be rewritten to ... ZX Spectrum, and adapt FPGA code and/or hardware where necessary ... -
Smooth (vertical) scrolling on ZX SpectrumI was just thinking about this. You know, you have systems like Atari 2600 or Sega SG-1000 that have no hardware scroll, but they have games that sti…
... a 128 and halve the vertical resolution you can do it ... . But then a 2-pixel scroll at 50Hz would be far ... -
Smooth (vertical) scrolling on ZX SpectrumI was just thinking about this. You know, you have systems like Atari 2600 or Sega SG-1000 that have no hardware scroll, but they have games that sti…
... a 128 and halve the vertical resolution you can do it ... . But then a 2-pixel scroll at 50Hz would be far ... -
Flip Screen vs ScrollingWhich do you prefer? I've always liked flip screen games but I had a C64(spit) owning friend who hated them with a passion.
... scrolling. Quite why it didnt scroll smoothly horizontally like it did ... CPU intensive than vertical scrolling.
To scroll 1 pixel vertically ... pixels (32 bytes). To scroll 1 pixel horizontally you need ... the display you want to scroll and OR in 192 ... -
Drawing 3D grids in Basic...This is probably very simple for someone who feels comfortable with Math, but it's driving me crazy... Let's say I want to draw a grid of 16 by 16 s…
Here's one way. The vertical loop is actually executed 17 ... each horizontal line.
[code]
1 DIM c(17 ... =xr-xrm: NEXT y
[/code]
I'm not ... -
48k game to 128 DSK ?Yes exist a good way to convert a 48k game from emulator (z80, .sna, etc), to a dsk format to be used by emulators or the real Spectrum +3 ? thx in…
... . it converts snapshots to standard code block so you can use ... [/url]
If you scroll to the last post, you ... -
Push/Pop data copyingWe all know that stack pointer cheese and push/pop is faster to move data than LDIR - which in turn is slower than unrolled LDI's anyway. I rewrote …
... I said I had some code running that is redrawing the ... long as you don't scroll sideways. Some limit on how ... -
RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…
... , a seperate routine used to scroll the paper (window) up on ... or not. Write your own code to get the next string ... -
50Hurts - Full-screen 50Hz 1-pixel scrolling on a 128K Speccy50Hurts - Full-screen 50Hz 1-pixel horizontal scrolling on a 128K Speccy. Graphics are an obvious nod to Joffa, whose games and banter were a big ins…
... />
As for joffa's code, very big 6-7 masked ... attribute scrolling (joefish does not scroll attribute map) is not helping ... -
50Hurts - Full-screen 50Hz 1-pixel scrolling on a 128K Speccy50Hurts - Full-screen 50Hz 1-pixel horizontal scrolling on a 128K Speccy. Graphics are an obvious nod to Joffa, whose games and banter were a big ins…
... cool! I see the code is full of push push ... copied into place in the code each frame and the ... it was a 2 pixel scroll, the 2 pixels on ... 522533]As for joffa's code, very big 6-7 ... attribute scrolling (joefish does not scroll attribute map) is not helping ... -
The most unique game loaderFor me it has to be Technician Ted, when the stripes give way to walking men and a timer.
... anyway, but seeing proper smooth scroll during the load, it really ... if I know how to code that, I was impressed nevertheless ... -
50Hurts - Full-screen 50Hz 1-pixel scrolling on a 128K Speccy50Hurts - Full-screen 50Hz 1-pixel horizontal scrolling on a 128K Speccy. Graphics are an obvious nod to Joffa, whose games and banter were a big ins…
[QUOTE=Arda;522843]Your code is fine. Sorry.[/QUOTE]
... it's 25fps? can you scroll faster? Eg. 2pixels or 3 ... -
Copying a SCREEN$ in ZX BASIC in 1 second?!Following on from the revived "[thread=20207]Saving a complete SCREEN$ in BASIC[/thread]" thread (although Arjun really only needed a suitable POKE i…
... posting [thread=30618]"storing machine code in BASIC"[/thread] from last ... writing a short routine to scroll down the whole screen with ... -
50Hurts - Full-screen 50Hz 1-pixel scrolling on a 128K Speccy50Hurts - Full-screen 50Hz 1-pixel horizontal scrolling on a 128K Speccy. Graphics are an obvious nod to Joffa, whose games and banter were a big ins…
... which one bit of code modifies the code that then renders the ... no good at reading others' code myself. I can only ... with self-modifying code. I wrote an ST parallax scroll that copies ... wrap-around buffer. This Speccy scroll copies sequences of PUSH statements ... -
50Hurts - Full-screen 50Hz 1-pixel scrolling on a 128K Speccy50Hurts - Full-screen 50Hz 1-pixel horizontal scrolling on a 128K Speccy. Graphics are an obvious nod to Joffa, whose games and banter were a big ins…
... writing one word into the code for every word of screen ... /> Unless it also inserts some code to shift the stack pointer ... -shifting for a 2-pixel scroll. -
Microvitec 1431 MonitorI've been lucky enough to get my hands on a Microvitec 1431 monitor, the one with a dedicated Spetrum input. This works great on a 48k with the in…
... BRIGHT signal
[code]
[B]128K ZX Spectrum ... sync TTL
/ \ 5 Vertical sync TTL
5 | 4 ... /> | 8 Blue TTL
[/code]
so from the ... -
Best way to organise a multi screen game?Hi All, Does anybody know ay good ways to organise large multi screen game? Or any links to useful texts on the matter? In my previous single scr…
... you could also include a code for vertical repetition, then remember when ... ]Gauntlet[/I], with some intelligent code to insert the graphics for ... -
GUI/OS for the Spectrum?Hi, Is anybody working on a WIMP/GUI system for the Spec? Is there anything current out there? [url]http://snakeoillabs.com/wordpress/2005/10/30/8…
... got around to writing any code:
[img]http://sites ... very detailed. I love the scroll bar and the yellow folder ... -
fast font engine possible?inspired by the recent "proportional font" thread for zx basic and ideas for gui and having done some of the work on this in the past i wonder if it …
... (and simplest) code, but one can also fast- scroll affected part to ... -
fast font engine possible?inspired by the recent "proportional font" thread for zx basic and ideas for gui and having done some of the work on this in the past i wonder if it …
... is, with some irrelevant code removed:
[code]PrintChar:
push ... /> jr c,.prcNoScroll
; scroll the whole screen one line ... /> printYPos: db 0
[/code]
character height is 7 ... />
p.s.: the code taken from 'The Pawn' game. -
ZXDS questions...Hi Folks, I am hoping someone on here knows something about [B]ZXDS[/B]. I have downloaded the program to my daughters [B]DSi[/B] (for testing purp…
... narrow it down:
[CODE]100 BRIGHT 0
110 ... NEXT y[/CODE]
The issue shows on the vertical lines ... -
Games featuring... relevant bugsThere was a recent improvement to the WoS database in order to classify [URL="http://www.worldofspectrum.org/forums/showthread.php?t=34261"]Games fea…
... "]here[/URL][/quote]
[code]
d45f: inc (ix+$14 ... /> d46b: jp $9a41[/code]
When code at $d468 runs, crash ... elsewhere such as here:-
[code]
d17b: ld hl, $cbcd ... -
List of existing games that needs a port to zx spectrumPlease post here the games that exist in other platform(s) but does not exist in speccy. Please keep in mind this is not a to-do list, so don't hesti…
... but based on tiles with scroll registers. The resolution is ... it replaced the old Atari code for font handling/scrolling/scaling ...
NVDI replaces the backend code (such as the AES libraries ... a result of the improved code, much quicker, smoother and ... -
List of existing games that needs a port to zx spectrumPlease post here the games that exist in other platform(s) but does not exist in speccy. Please keep in mind this is not a to-do list, so don't hesti…
... code. Only possibility is to utilise the DMA to speed up vertical ... that TOS was a ported code from a non-GUI OS ... -
Most colourful games?I just played [url=http://www.worldofspectrum.org/infoseekid.cgi?id=0001563]Earth Shaker[/url] and am fairly dazzled by the overload use of colour (t…
... images at 45?, so things scroll one character left and one ... that's wrong for a vertical shmup there, like the crappy ... -
Speccy screen display novice: What am I missing?[deleted]
... may be either border or vertical retrace.
Then the ... creators. It's the Basic code that treats them differently than ... -
Most colourful games?I just played [url=http://www.worldofspectrum.org/infoseekid.cgi?id=0001563]Earth Shaker[/url] and am fairly dazzled by the overload use of colour (t…
... 'm guessing the 21 pixel vertical limit on hardware sprites is ... mask routines, or write dedicated code for the purpose. Not sure ... -
Sinclair Programs uploaded.I've just uploaded a ZIP containing all the 'Sinclair Programs' programs and the instructions for each one. (Well all the ones from 'The Type Fantast…
... Page - May'85
Morse Code - Peter Ford - Apr'84
Scroll (aka. Smooth Screen Scrolling In Machine Code) - Tony Rickwood ...
