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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.I -
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 effect when the I register pointed to any contended page ... to $7e, I got no snow on my test program :(
Anyone for a hacking challenge ?I have to get the DSK version of Tomahawk to work. It uses the well-known Digital Integration "SECURITY CODE" lock just like in Bobsled, ATF, etc. Th…
... against our own.
Scroll back a tad again and ... will be in the D register above and will be ANDed ...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…
... screen of 256x128 pixels to scroll. That's 4096 bytes, ... area to scroll.
scrol0 rl (hl) ; scroll byte left.< ... />
scrol0 rl (hl) ; scroll byte left.
dec hl ... an 8-bit register as the h register will only change ...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 …
... to this I would use register pairs to do the 'scrolling ... line scrolled. To do the scroll in the other direction would ...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…
... z80, you might want to scroll down to the "The IM2 ... is combined with the I register (with I the most significant ... we can change the I register to whatever we want, we ...RealXThis may be a dumb question but will RealX ever get released?
... of the I register and the R Register, combined to form ... applied during this period is "snow contention".
... do with clarification - as snow contention is not applied until ... cases.
Your Snow documentation also states incorrectly that ...RealXThis may be a dumb question but will RealX ever get released?
[quote=Luca]Then it isn't clear to me what do you mean by "snow contention".[/quote]
Dunny likes to call contention based on the IR register pair outside of M1 cycles as snow contention. But only when it causes the snow.RealXThis may be a dumb question but will RealX ever get released?
... the IR register pair outside of M1 cycles as snow contention. But ... only when it causes the snow.[/QUOTE]
In RS source ...The 128 plus 2 wasn't very goodHaving looked at the review in issue 33 of Crash of the Spectrum Plus 2, it strikes me as a bit odd, as if Simon Goodwin had to like it. I remember r…
... video ram for vertical scroll, with a register indicating pixel row to ... of bytes in an internal register that stored the last pair ... amount 0-7 indicated by register. This could be done without ...Scrolling Loader CounterPlease can someone help me with writing a scrolling counter for a loading system. I like the Hewson counter so i`ve taken the font from zynaps loade…
... `t even understand how to scroll the numbers in assembly yet ... /> partx ;last part
;store register
;finish your work
Help make Retro Gamer greatI'm more than happy with the articles that are now appearing in Retro Gamer, but I want it to become far more of a hub for the retro community than i…
... confirmed how the spectrum ULA snow effect work - lots of people ... back to the ULA as snow. This can have all sorts ... see is when the IR register pair is cycled through to ... to appear, through which the snow falls and causes the ULA ...Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... asm) so your "scroll-test.c" became module "scroll".
#asm
////////////////////////////////////////////////////////////////////
// Scroll the double printed message 1 ... "disp" in the HL register pair. FASTCALL linkage only ...Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... like starting and stopping continual scroll and changing the message that ... /> scroll_isr() is set up to scroll the message only if installed_mess ... create a generic isr and register / remove interrupt routines with the ...Help hacking Split PersonalitiesI`ve been hacking away at Split Personalities for the purpose of putting new screens and graphics (items). The current screen is at 41187 and is 160…
... register and this is where your first screen starts. If you scroll ...Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…
Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…
... the "Snow Effect" with particular values of the I register.[/QUOTE]
In fact, I thought the snow effect ... />
I wonder if the snow effect might be another clue ...Whats Gone Wrong - Pixels Everywhere!Changed one small piece of code, that doesnt do anything to the screen and the following has happened: [img]http://www.officetrack.com/download/wos/…
... . When called with the A register set to FF, it is ... ). I will relook at the scroll routine, which doesnt use any ...Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…
For anyone interested in implementing the snow effect, this 48K machine here uses ULA address for A15-A7, and R register for A6-A0. That slightly contradicts the Ramsoft docs (R for A7-A0 stated there), but there you go...Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... that allows us to register functions to run ... /> g_scrollShift = 16; // initialize current scroll shift
g_scrollPos = g_textBuffer; // ... disp, 32, 8); // scroll scanline left using operation #8 ...Any Speccy Emulators for PSP?I was wondering if there was a decent Speccy emulator for the PSP, I have tried zx4all & PSpectrum but neither seems to work. Can anybody recommend …
... )[/QUOTE]
If you register on the on the forums ... most icon (settings) and then scroll down to the 5th icon ... settings) click on this then scroll down to the second last ...ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…
... will show you how the snow effect works.
Basically ... refresh cycle when the I register is at that magic range ... lower 16K and hence the snow.
Summay: ULA generates ...ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…
... read access, one bug -> snow effect)[/QUOTE]
If ... following as proof that the snow effect has nothing to do ... only occurs when the I register is set to a particular ...help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…
... is loaded into the c register under the scrldn heading), one ... way to make the screen scroll down by one pixel.First multiload gameWhile writing the review of A View to a Kill for the Speccy review book, I commented that it was one of the first multi-load games for the Speccy. D…
... and just change the video register at the appropriate scan line ... avoid even attempting a full scroll of the game area.
First multiload gameWhile writing the review of A View to a Kill for the Speccy review book, I commented that it was one of the first multi-load games for the Speccy. D…
... and just change the video register at the appropriate scan line ... avoid even attempting a full scroll of the game area.
MB02+ software and system developmentsThe following text was (before last modification) first published here: [url]http://www.sintech-shop.com/forum/board.php?boardid=20[/url] As discuss…
... RESIDOS:
ULA snow effect (screen raining) is active ... /128/+2(grey) if register I is set to same ... clones don't snow, and more russian games use register I set ... RESIDOS you can detect if register I is set to ... on +2A/+3. If register I is set to range ...MB02+ software and system developmentsThe following text was (before last modification) first published here: [url]http://www.sintech-shop.com/forum/board.php?boardid=20[/url] As discuss…
... in RESIDOS:
ULA snow effect (screen raining) is active ... /48/128/+2(grey) if register I is set to same ... crash on +2A/+3. If register I is set to range ...list of ZX games with raining effect(ula snow)If you know any ZX games with raining effect in screen, then add game name to list. I know about this games only: (tested on real ZX128+2 - grey) 4x…
... and register I is set to fast memory = no snow. (ZX48 ula snow ... only if register I is set ...
