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Scrolling by 2 pixelsWhat is the fastest way of scrolling a Spectrum screen line by 2 pixels left or right? When thinking about it I've come to this simple solution: [C…
... is the fastest way of scrolling a Spectrum screen line by ... -
Scrolling TextI've being trying to find a simple basic way of scrolling some text on a single line, My method is ridiculous, I've been using the print statement fo…
... a simple basic way of scrolling some text on a single ... staggered given the illusion its scrolling.
Hello and Welcome ... -
Another vertical scrolling questionwhile talking about w256 x h128 vertical scrolling, are 128k modes have any advantages over 48k models? has extra ram or swappable screen buffer any…
while talking about w256 x h128 vertical scrolling, are 128k modes have any advantages over 48k models?
has extra ram or swappable screen buffer any use on scrolling? -
Found my old Manic Miner scrolling hackI don't remember if I put this old hack here on WoS so [URL="http://homepage.ntlworld.com/e.tinney/manic.szx"]here's a snapshot[/URL]. Be impressed w…
I don't remember if I put this old hack here on WoS so [URL="http://homepage.ntlworld.com/e.tinney/manic.szx"]here's a snapshot[/URL]. Be impressed with the silky smooth scrolling :p -
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…
... rules on using the IX register? Are there any restrictions on ... -
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…
... /floatingbus.html"]when the I register falls in the range 0x40 ...
A7-A0 = the R register of the Z80
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 +…
... />
[CODE]
; Bi-Colour Scrolling-Buffer Game Engine for Four ... to allow vertical attribute-based scrolling.
;Use 8x2 repeated block ...Parallax scrolling - Shadow Of The Beast tech demoHi there folks! I thought I'd post what I've been pottering around with for the last couple of weekends. I've been experimenting with doing multi-la…
... with doing multi-layer parallax scrolling on the humble 48K. I ... />
It runs at 25Hz, scrolling a 224x192 screen.
Help for beginner with z80Hi chaps, I'm reasonably new with z80, but had a fair amount of experience with 68000, so decided to give a few things a go. One little thing I'm t…
... trying is to write a scrolling message using the 8x8 attribute ... can't pass in a register to the BIT commend, e ...Scrolling in BASICI remember a few BASIC typeins for other machines that claimed to be scrolling the screen. Obviously vertically its not too difficult - once you dis…
... machines that claimed to be scrolling the screen.
Obviously ...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 …
... ,
I'm experimenting with scrolling colourful graphics. I'm keeping ...[NEW] Retro Virtual Machine v1.0.0 for OSX released!!!!Here it is! Retro Virtual Machine v1.0.0 RELEASED!!!! Many thanks first to Patrik Rak for the PZX format and for their Z80 tests without which RVM…
... Z80 emulation, including the ‘memptr’ register and the hidden flag ‘q ... test i have found.
‘Snow bug’ emulated in the affected ...Ninjaman 8-way scrolling 50Hz multicolour demo :-)Here's a demo I've been working on for a while. The goal was to make the best scrolling routine possible on a humble 48K ZX Spectrum. I was origin…
... was to make the best scrolling routine possible on a humble ... /> - 50Hz redraw
- 8-way scrolling
- Multicolour backgrounds
- No ...The I register and IM 1Hi al! I've been doing some coding, replacing the BASIC ROM with my own code and upon examination of a few 16Kb cartridges, all the ones I've look…
... to say about the I register, apart from its use in ...R registerI'm cross-posting this as a spin-off of a [url="http://www.worldofspectrum.org/forums/discussion/52748/zx-spectrum-cartridges/p2"]thread in "Hardware…
... & correctness of the R register behaviour.
From ... br /> [quote]Memory Refresh (R) Register.
The Z80 ... of this 8-bit register are automatically incremented after ... instruction fetch. Hence R register can be considered a simple ...Print (to screen) avalue held in a register pairHi guys, looking for a routine that will print any value from 0 to 65535 to the current position on the screen. I once heard that there was a PRIN…
... a value held in theBC register pair, to the current screen ...Scrolling loader counter in 85 T-States?Would it be possible to write a scrolling loader counter in 85 T-States? I have a custom screen load routine that loads attribute first, then the …
... be possible to write a scrolling loader counter in 85 T ... I can fudge in a scrolling load counter in 85 t ...The HL Register Pair Naming. An Observation.This isn’t really a question or a tip. Just an observation about the naming convention of the registers in the Z80 CPU. It seems that every register …
... CPU. It seems that every register other than the HL pair ... [/b]—[b]F[/b]lag register
[b]I[/b]—[b ... ]Y—[b]I[/b]ndex register [b]X[/b]/[b]Y ... /> Then come the good-old register pairs:
[b]SP ...Modern Speccy games with good scrollingOne of the things I like the most on the Spectrum is also one of the hardest to pull off - a good scroll in an arcade type game. Uridium is one of my…
... a game with really good scrolling on it. Pilot Attack scrolls ...Zynaps scrolling - anyone ever reverse enginnered this?Zynaps has IMO some impressive scrolling - it utilises 18 character rows of the display file, so quite a large active play area, and scrolls 2 pixels…
Zynaps has IMO some impressive scrolling - it utilises 18 character rows ...How to write a simple BASIC* horizontal scrolling game (Tutorial) [b]How to write a simple BASIC* horizontal scrolling game[/b] In this tutorial, we will be talking about how to write a simple BASIC* horizont…
... write a simple BASIC* horizontal scrolling game[/b]
... write a simple BASIC* horizontal scrolling* game.
...
*) Well, the horizontal scrolling part isn't in basic ... br /> [b]A) Drawing a scrolling screen[/b]
We ...How to write a simple C+asm horizontal scrolling game (Tutorial, z88dk)[b]How to write a simple C/asm horizontal scrolling game[/b] [b]Note:[/b] This tutorial has multiple parts... I am still writing but this first pa…
... a simple C/asm horizontal scrolling game[/b]
[b ... />
[b]A) Drawing a scrolling screen[/b]
We ... /> Well, this is only the scrolling part of the game. It ... using it to add out scrolling function in here, in assembly ...ScrollingBit of a daft topic but anyway... Which game had the best scrolling? I would have to volunteer Commando and its silky-smooth scrolling. A particula…
... earlier:
; Screen scrolling routines
; for quick use ... which is a commonly used register to load memory contents), which ...
; done using another register (you can't ADD HL ... old code) my horizontal scrolling routine must have been crap ...Is spectaculator emulating the +2 correctly?i remembera few games that would crash when running in 128K mode, due to a bug in the hardware of the grey +2, hence it being replaced with the +2a. …
... here..
didnt the snow effect only occur on the ... that happening on a sideways scrolling footbal game demo on a ... . does spectaulator emulate this ULA snow effect?
[ This Message ...Is spectaculator emulating the +2 correctly?i remembera few games that would crash when running in 128K mode, due to a bug in the hardware of the grey +2, hence it being replaced with the +2a. …
The 'snow bug' in the ULA is ... activated by setting the I register below 0x80 and above 0x3f ... whether or not the I register is in that range with ...Is spectaculator emulating the +2 correctly?i remembera few games that would crash when running in 128K mode, due to a bug in the hardware of the grey +2, hence it being replaced with the +2a. …
[quote]
On 2003-08-08 00:18, needlej wrote:
(Woody - I couldn't get SPIN to reproduce this even with 'emulate ULA snow' turned on?)
[/quote]
GFX.SnowEffect := (Registers.I >= 64) and (Registers.IIs spectaculator emulating the +2 correctly?i remembera few games that would crash when running in 128K mode, due to a bug in the hardware of the grey +2, hence it being replaced with the +2a. …
... the effect when the I register pointed to any contended page ... to $7e, I got no snow on my test program :(
Head Over Heels remake RELEASED !Hey all ! The Retrospec remake of Head Over Heels has JUST been released. The URL with everything important, including a 15Mb download is : [url="h…
... the surprisingly effective use of scrolling in multi-screen rooms.
snow, which is an effect I ...Smooth Screen ScrollingHi Everyone, Any suggestions on what is the best way to do horizontal scrolling ie. in Zynaps fashion. I am working on a routine at the moment, whi…
... to decrement a 16-bit register when we can achieve the ... decrementing an 8-bit register as the h register will only change ... if the l register is zero prior to doing ... game you can tell the scrolling routine to simply skip it ...How can I scroll a line of text and wrap perfectlyI know this is easy for most of you but for some reason I am messing it up. In Assembly Language I want to do the following: I have 1 line of text …
... I would use register pairs to do the 'scrolling'.
Hence ...
