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CyberbigI found out that Cyberbig is affected by snow effect in FBZX Wii. There is snow in the all screens except in the main menu. I checked that also Spe…
... ]The ULA bug which causes snow when I is set to ... of interaction between the I register content and the own pagination ... -
Add horizontal hardware scroll to ULA+In this case we must read a bit in the ULA+ for test if supported. And the future software that uses it must have to branch: 1. If hardware scroll i…
... IM2 IRQ I set the scroll to 0 pixels. My both ... code) I write the desired scroll register values for the rest of ... screen that I want to scroll. Would this work? -
Add horizontal hardware scroll to ULA+In this case we must read a bit in the ULA+ for test if supported. And the future software that uses it must have to branch: 1. If hardware scroll i…
... IM2 IRQ I set the scroll to 0 pixels. My both ... code) I write the desired scroll register values for the rest of ... screen that I want to scroll. Would this work?[/QUOTE]
Introduce yourself[SIZE=3][FONT=Comic Sans MS]This is the thread to stop by & introduce yourself.[/FONT][/SIZE]
...
scaling
screens
scroll
scrollshooter
shadebobs
snow
spiral
sprites
star wars scroll
starfield ...SE BasicAfter 13 years of development I thought I'd run out of things to optimize, but it turns out I was wrong. However, I'm now running out of time to work…
... Timex hi-res.
[*]IY register available in interrupt mode 1 ... 8-bit character sets.
[*]Scroll counter increased.
[*]Set the ... variable space accessible via IY register.
[*]Works with esxDOS on ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
...
exx ; alternate register set
push hl ... /> ; -----------------------------------------------------------------------------
; THE 'SCROLL?" MESSAGE
org 0x3235
incbin "scroll.txt" ; stored here for ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... /> ld a, 25 ; scroll counter value
sub ... :
exx ; alternate register set
push hl ... print_a_2:
exx ; alternate register set
push hl ... '
exx ; main register set
ret ; ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... .ifdef ROM1
ldir ; scroll pixel line in graphics mode ... bc, ulaplus_reg ; address I/O register
out (c), a ...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…
... can see where the r register only incrementing through the lower ... cell for part of the scroll then it jumps down to ...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…
... can see where the r register only incrementing through the lower ... cell for part of the scroll then it jumps down to ... the offset value in another register, which is then copied to ...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…
... ?t=17551&highlight=ULA+Snow"]this[/URL] thread:
snow effect, this 48K machine here ... for A15-A7, and R register for A6-A0. That slightly ...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 ... lower 7 bits of R register instead the correct way.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 ... grey +2 model because use register I set to #5B value ... in slow ram = ulo show snow/raining effect.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…
... grey +2 model because use register I set to #5B value ... in slow ram = ulo show snow/raining effect.[/QUOTE]
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…
... ? Because I found some ULA snow effect during the game. If ... tap file contain during game register I set to value #5B ...Demo of multidirectional scroll 50fpsHello!!! Im working with scrolls, and I want to show you a demo of a posible game. It works at 50fps and can manage about 7 sprites in the screen w…
So you finaly found the hardware scroll register in the ULA too. :razz:
Nice. cannot await to show the finished game to some commodore users.Robocop 3 and Spectrum 128K toast-rackHi all, we are going on with the tests on the new 128K emulator for the V6Z80p board, and we have found something odd: Robocop 3 (designed for the 12…
... invite you to watch the snow effect on my ZEsarUX emulator ... triggers with the exact situation: register I pointing to contended memory ...Games that crash because of contended memory.I find these are really annoying. You load up a game like Astro Marine Corps, Fantasy World Dizzy, Dizzy: Prince Of The Yolkfolk and so on (the init…
... a crash when the I register points into contended ram. Emulators ... 3. I can see the snow effect but without other problems ...Face-Off: ZX Spectrum vs. Commodore 64I found an old oldish, but very informed and interesting article on the ole Spectrum vs. Commodore 64 argument. The article explains the technical d…
... whole screen; it couldn't scroll in a window. To get ... bottom scoreboards required changing the scroll registers at just the right ... a bit of planning (any register write happens pretty much when ... ] to write a maskless vertical scroll, have a look at [b ...Face-Off: ZX Spectrum vs. Commodore 64I found an old oldish, but very informed and interesting article on the ole Spectrum vs. Commodore 64 argument. The article explains the technical d…
... split at least the horizontal scroll register (the vertical can't do ...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.…
... screen, and you wanted to scroll it horizontally, you could just ... overflow bits in the A register, then move on to the ...Buffer to screen - how much?[FONT=Calibri][SIZE=3]I am starting to build a new game and am researching different ways to accomplish what I need to do. My question is, is it poss…
... does same thing in horizontal scroll level.[/QUOTE]
Interesting ... behind the scenery.
Scroll size is a matter of ... scenery blocks into 16-bit register pairs and then using different ...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…
... , another for OR. The extra register operations would probably exceed the ... horizontally. But how can we scroll an odd number of steps ... for odd numbers. To repeatedly scroll single steps sideways, you alternate ...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…
... the asm entry point with register API from the c entry ... the libraries are built. Just scroll down to the z80asm invocations ...40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…
... first read char bits to register and align them to byte ... also need a scroll function. Here's a scroll up for 6 ...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 ...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…
... 's possible to make it scroll the whole screen like that ... test case for the ula snow effect ;)Subtract 4 from an addressThis is a novice Z80 question really: I'm trying to vertical scroll my back buffer, but I'm not sure of the quickest way to apply an offset and mo…
... area I need to vertical scroll is therefore 18 chars wide ... boundary, and decrement a single register only. Thus subtracting 2 from ...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…
...
;**************************************************
;* scroll
;**************************************************
;* scrolls the hi ... br /> print_64:
; register a contains character
; ...Composite picture qualityI have read many many discussions here about the composite video modification of the Spectrum 16/48K models. I have choosen one of the simplest comp…
That's a fix for the ULA snow effect when the Z80's I register is set to point at contended memory. Won't do anything for the picture quality.
B
