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Clearing 22 lines of the screenHow do I go about clearing the top 22 lines of the screen and leave the bottom #0 area untouched? I have a routine to reset the attributes, but cant…
... paper and ink) in each attribute square in the top 22 ... look slow, like an intentional scroll down effect! -
ULA snow effectIt's wintertime, you know. [quote="http://ramsoft.bbk.org.omegahg.com/floatingbus.html"]when the I register falls in the range 0x40-0x7F then the UL…
The perfect explanation of ULA snow if you have not ... by CAS.
The Snow Effect occurs because the ULA ... RAM.
This is the Snow Effect.
I will ... as Arjun says the ULA snow only change the 7 ... ). The result is that attribute and bitmap address of odd ... -
ULA snow effectIt's wintertime, you know. [quote="http://ramsoft.bbk.org.omegahg.com/floatingbus.html"]when the I register falls in the range 0x40-0x7F then the UL…
The Snow effect can affect all columns, both odd and even from Woody's experiments which I was a witness to - we had a fullscreen attribute-level vertical scroller at one point, which was entirely unintended but looked lovely :)
D. -
ULA snow effectIt's wintertime, you know. [quote="http://ramsoft.bbk.org.omegahg.com/floatingbus.html"]when the I register falls in the range 0x40-0x7F then the UL…
[QUOTE=Dunny;747755]The Snow effect can affect all columns, ... to - we had a fullscreen attribute-level vertical scroller at one ... -
Pac-Land: can be coloured?All versions of this game are full coloured, but not the Spectrum version. It has large sprites, but maybe the scroll is too fine to make a coloured …
As is the lo-res Commie-ported sprite of Pac Man himself.
Personally I think the whole graphics engine needs re-writing from scratch, with [I]Trap Door[/I] style blocky attribute handling. The daft thing doesn't even scroll. -
FBSThis is one of those things that is more like an experiment than a real project. I was trying to do this in BASIC, then realised my BASIC was too ru…
... of limited drawing/ try parallax scroll on grass / houses at the ... at the bottom, both on attribute boundary?
The idea is ... tree line over them. Then scroll them a bit faster then ... move up and down (in attribute boundary) :) -
Pac-Land: can be coloured?All versions of this game are full coloured, but not the Spectrum version. It has large sprites, but maybe the scroll is too fine to make a coloured …
... variable-speed per-pixel screen scroll for either a remake of ... hidden screen, and synching the scroll with the screen refresh and ... flipping to double the vertical attribute resolution. So Pac-Man's ... -
Scrolling Bi-Colour Engine for 4-Player GamesJust putting this code up for people to have a look at. Far from finished. Should simply compile and run a bit of a demo. Only good for 128K and +…
... [/I], etc.
The scroll looks a bit rough because ... couldn't scroll it. The engine can shift the entire attribute file ... -
THE HOBBIT loading screenHello again, thought I'd have a go at an alternative loading screen for The Hobbit. [IMG]https://dl.dropboxusercontent.com/u/61658082/THE%20HOBBIT%…
... first picture best (The cyan snow is OK, because snowy mountains ... 1 blue in the same attribute square. Could we cheat and ... -
What is this Nirvana engine?Ive been trying to look for a thread on this but cant seem to locate one. I downloaded a spanish game called El Stompo that uses this engine which ha…
... screen is carefully disguised ordinary attribute graphics, but there's also ... for the buffer so cannot scroll.
[I]BIFROST*[/I ... attributes, so it could not scroll or relocate them easily. As ... -
Spectrum screen layoutSeeing the thread on displacement I was wondering why the spectrum had the stupid screen split into three sections and the addresses for each section…
... of the CPU or a 'snow' effect on screen). A less ... the same as the corresponding attribute address, and only the remaining ... scanlines (0–191) together with attribute rows (0–23 — our ... addresses and 010110YY YYYxxxxx for attribute addresses, where YYYYY is the ... -
Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…
... and I found some ULA snow in the options menu screen ... that ULA snow effect there, but, after several seconds, few attribute squares ... -
Test screens for ZX PrismNot sure that this is *really* the right section for this request, but it's relating to new hardware I'm developing so let's start it off here - a mo…
... ; 256x192 with 8x1 attributes (the attribute bytes complement the screen pixel ... scope. If you could hardware scroll them (whilst hiding one character ... 0-3. The corresponding 2 attribute bytes could define each of ... -
Test screens for ZX PrismNot sure that this is *really* the right section for this request, but it's relating to new hardware I'm developing so let's start it off here - a mo…
... ; 256x192 with 8x1 attributes (the attribute bytes complement the screen pixel ... or 512x384 as the 8x1 attribute data resides in the VRAM ... scope. If you could hardware scroll them (whilst hiding one character ... how to make the tiles scroll around. I jotted a few ... -
Better arrangement for video memory?While doing some documentation work for the ZX-Uno project, I compared the advantages of the weird layout of the ZX Spectrum against a linear layout.…
... /> The issue about how the attribute layout would look like remains ... [I][SIZE="1"]because the attribute data is retrieved from a ... another one to read an attribute from screen RAM. The datasheet ... .at/temp/palstuff/]this site (scroll down to AEC Line Glitch ... -
Better arrangement for video memory?While doing some documentation work for the ZX-Uno project, I compared the advantages of the weird layout of the ZX Spectrum against a linear layout.…
... [I][SIZE="1"]because the attribute data is retrieved from a ... to say that the C64 attribute layout is linear. [I](EDIT ... another one to read an attribute from screen RAM. The datasheet ... .at/temp/palstuff/]this site (scroll down to AEC Line Glitch ... -
Simple text scrolling routine...I'm having trouble writing a very simple text scroller, the idea is to use the ROM printer routine to print 32 characters each time the routine is ca…
... As solution - hide letter from attribute("Toxic Elephant" demo)
or ... demo: ei:halt
call scroll
ld bc,$7FFE;spacebar ... adress for output
scroll:
ld hl,screen_adr< ... ret
scrtxt: db "*simple scroll* "
db 0
< ... -
Screen buffer Tip from Raff CeccoRaff very kindly gave me this tip: "Incidentally, I remembered a trick I used on the Z80 for extra speed: When clearing the screen buffer, it was a…
... when they're within the attribute of a moving bit of ... empty character for it to scroll into. Though that's really ... -
64x48 monochrome big pixels display ideaHi. I was playing with this idea of having a simple 64x48 bytes buffer, 1 byte per pixel, then a renderer which would take that buffer and render it…
... sense when you need to scroll parts of the screen only ... -states to copy the entire attribute buffer to screen every frame ... for odd rows, setting PAPER attribute for even columns or INK ... attribute for odd columns. Also set ... -
64x48 monochrome big pixels display ideaHi. I was playing with this idea of having a simple 64x48 bytes buffer, 1 byte per pixel, then a renderer which would take that buffer and render it…
... from linear buffer to next attribute row, simply using a straightforward ... must be stored as single attribute in linear buffer. It ... . But how can we scroll an odd number of steps ... for odd numbers. To repeatedly scroll single steps sideways, you alternate ... -
Speccy Vs Amstrad CPC Vs C64I hope no one minds me posting this here as well as in the announcements section. I'll delete it if there is a problem. It's childish fun but can I …
... hires without having to take attribute limitations into consideration.[/QUOTE]
scroll of the C64 definitely gave ... it was without the smooth scroll.. In that video, I'd ... -
Testers for new z88dk clibA long (long, long, long) time ago a few people offered to help test the new clib in z88dk. Much time has passed since then and I won't hold people,…
...
0x0f -- foreground attribute (colour of text)
< ... indicate which existing attribute bits are kept when ... -- background attribute (colour used to clear window and scroll)
... , bool); // page or scroll
ioctl(fd, IOCTL_OTERM_PAUSE ... -
Edge Grinder, how would YOU do it?I always meant to post about this and AndyC reminded me in the 'vs' thread in games. [QUOTE=AndyC;808887]The thing I love about threads like this is…
... trick might be 25fps PUSH scroll on 128K only, synching the ... scroll renderer with screen flipping to get double vertical attribute resolution ... -
Edge Grinder, how would YOU do it?I always meant to post about this and AndyC reminded me in the 'vs' thread in games. [QUOTE=AndyC;808887]The thing I love about threads like this is…
... /> and it will double scroll as per the Amstrad version ... /> botstartAG HALT
; scroll the text
LD HL ... a ZERO so it wll scroll
attribute messages will appear and ... -
Uridium possible with more colour??Having seen the MSX version of Uridium mentioned in another thread I wondered if the Spectrum could produce anything similiar, and had a go at a mock…
... passes of any sort of attribute or graphics rendering loop.
scroll at the same rate as ... -
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…
... line)
- text colour (attribute used when printing)
- text ... attribute bits on screen)
- background colour (the cls and scroll ... classes:
- scroll or page mode (page mode ... screen when full rather than scroll)
- pause enable ( ... -
Scrolling colourful graphicsHi,<br>I'm experimenting with scrolling colourful graphics. I'm keeping 8 pixel empty gap between colourful blocks to avoid colour clash.<br><br>But …
Empty gaps should never have attribute 7. Instead, it should always ... repeat attribute from next char (like in ... hit this threshold, you should scroll attributes once in that same ... will be able to freely scroll image in both directions ... -
Scrolling colourful graphicsHi,<br>I'm experimenting with scrolling colourful graphics. I'm keeping 8 pixel empty gap between colourful blocks to avoid colour clash.<br><br>But …
as Einar said the attribute for the blank area at ... 555222444, so that the pixels scroll into an area which is ... left ready for the next scroll
good examples where you ... -
Game development guidesHello all, I want to get into game development for the ZX Spectrum and would like to know where I can find some helpful guides. I've looked around t…
... in how the callee/fastcall attribute is added to the function ... the libraries are built. Just scroll down to the z80asm invocations ... -
ULA snow effectIt's wintertime, you know. [quote="http://ramsoft.bbk.org.omegahg.com/floatingbus.html"]when the I register falls in the range 0x40-0x7F then the UL…
I have impemented the "ULA snow effect" in my emulator and ... />
You can look the "scroll effect" runing in RVM in ...
