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128K shadow screen?Hi How does the shadow screen feature work , and how can it be used?
... bank 5 is where the screen memory is.
... the normal screen) in at the top of memory. You ... final thing is, which screen do you actually see? ... completely independent of which screen is paged in. There ... regular screen in at the top of memory and ... -
displaying all memory activity in a screenDunno why I keep thinking about this, but here goes Is it easy enough to add a screen to an emulator that shows every memory address' activity.... …
... the ratio to something more screen-friendly.
Another option ... leave off the 6K of screen memory, or display it as a ... -
Popular Computing WeeklyHope someone can help me, I've been typing in a whole heap of early Type-ins for the Amstrad CPC 464 and have typed in a program, though it's not wor…
... to that one line then resumes from the next line..
That ... tell it to reprint a line in WINDOW 2 then go ... -
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…
... take up very little extra memory. It's pre-shifted sprites ... that hog the most memory.
They trivialise the ... then saying the Spectrum's screen memory layout gave it an advantage ... to try and calculate a screen address.
As for ... -
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…
... then saying the Spectrum's screen memory layout gave it an advantage ... to try and calculate a screen address.[/quote]
The ... difference is that the Spectrum screen is directly addressable, and the ... -
Frames Per SecondHow many frames per second did the ZX Spectrum run at? I've found games that are 12.5fps but Ive recently been informed some games were at 25fps ...…
50 frames per second in PAL TVs.
The problem here is the CPU time to calculate and update objects in screen memory, not the real TV frame output.
If your calculations need 80 miliseconds, your game will only perform at 12.5 fps... -
Frames Per SecondHow many frames per second did the ZX Spectrum run at? I've found games that are 12.5fps but Ive recently been informed some games were at 25fps ...…
... . It has graphic memory representing whole screen and sprite is just ... also draw sprites directly to screen memory or to another part of ... memory - buffer. When you draw directly to screen you ... hurry and synchronize it with screen refresh. So yes, you ... -
Frames Per SecondHow many frames per second did the ZX Spectrum run at? I've found games that are 12.5fps but Ive recently been informed some games were at 25fps ...…
... also draw sprites directly to screen memory or to another part of ... memory - buffer. When you draw directly to screen you must ... how you update to the screen. The limitation above occurs ... never draws intermediate graphics to screen, there is never any ... -
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…
... , not the same way the screen memory is stored. I find it ... -
New video about S-video modification on Issue two 48K Spectrum.I just finished an s-video modification on an Issue two 48K Spectrum so I made a video about it. Most of the technical details are in the video; if y…
... cable with one overall screen.
The next best is s ... -
What if Amstrad never bought Sinclair ResearchApologies if this has been previously discussed, but I was thinking about this subject the other day. How do you think the whole Spectrum scene woul…
... bank of 16k just for screen memory in the spectrum+2? To ... -
What if Amstrad never bought Sinclair ResearchApologies if this has been previously discussed, but I was thinking about this subject the other day. How do you think the whole Spectrum scene woul…
... bank of 16k just for screen memory in the spectrum+2? To ... -
What if Amstrad never bought Sinclair ResearchApologies if this has been previously discussed, but I was thinking about this subject the other day. How do you think the whole Spectrum scene woul…
... bank of 16k just for screen memory in the spectrum+2? To ... -
What if Amstrad never bought Sinclair ResearchApologies if this has been previously discussed, but I was thinking about this subject the other day. How do you think the whole Spectrum scene woul…
... bank of 16k just for screen memory in the spectrum+2? To ... 's tax laws (by adding memory), and the +2 was then ... -
Two, count them, two games from DazmanHi everybody!!! (try reading that without Dr Nick Riviera's voice). We've got two new AGD games by Dazman... [IMG]https://scontent-a-lhr.xx.fbcdn.n…
... in timing with the first screen on which it happens. I ... made it past the first screen where this happens. About the ... could play it with the screen off. Next game, games I will ... -
Banked memory running slower?I've just compiled a TAP which includes bank6, it loads ok, but the routines that are paged in run slightly slower. The Z80 snapshot has no such pro…
... - this particular mode has no screen memory available to the z80, so ... -
Detecting flash mode inversionsIs is possible to detect with certainty when flashing characters change from normal to inverted and vice-versa?
...
inc d ;increment line D=010sslll
add a ... br /> jp nz,LOOP1 ;do next line, this row
dec (ix ... the next segment#
jp LOOP1 ;do next segment, first row, first line ... -
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…
Simple text scroller, first character problemin a text scroller, whole line scrolled to the left by 1 pixels using RL(HL) ; DEC L method. But at the rightmost character must be printed immediate…
... doing the scrolling directly in screen memory.
Regards,
Derek ...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 …
... " amount of hardware sprites on screen by sacrificing framerate - unless you ... using one of the 8k screen memory "bitmap" modes). I assume that ...A tally on the number of successful builds of the Harlequin[SIZE=4][COLOR=Green][U][B]A tally on the number of successful builds of the Harlequin.[/B][/U][/COLOR][/SIZE] Please post your successes below :-) …
... have timing issues in the screen memory was described here: [URL="http ...Interesting Tweet from Rick Dickinson, the Designer of the Speccy.Tweeted on the 15th Jan: "Is it time to crowd fund a real ZX Spectrum?": [url]https://twitter.com/rickdickinson12/status/555836404522303489[/url] […
... processor speed, increasing the memory (in line with machines like the Pentagon ...Features that are still wanted in Spectrum emulation.Features that are still wanted in Spectrum emulation. 4 USB joystick/gamepad input for real multiplayer games - Yes, Bomb Munchies.... - Sinclair 12…
... the bytes of the actual screen memory (maybe highlighting changes) with a ... a monochrome version of the screen's bitmap, and a coloured ... view the 128's hidden screen as it would display.Exilei\'m sure this has been brought up before but couldn't find a thread in 'New Game Ideas'. Why did the Spectrum never get a port of the BBC game Exile…
think some of the game code was hidden in screen memory for the electron IRC to make it fit into 16k.
the c64 version has self modifying code also, so if the code is stopped and restarted , it overwrites stuff.Exilei\'m sure this has been brought up before but couldn't find a thread in 'New Game Ideas'. Why did the Spectrum never get a port of the BBC game Exile…
... game code was hidden in screen memory for the electron IRC to ... at the border of the screen. On the BBC Micro (at ... 's hidden by changing the screen size, but this isn't ... 10K is reserved for the screen. I'd think that even ...The magic's goneI dunno, i'm glad the new site is now up and running and most of the regulars are here but there's something missing and i can't quite put my finger …
... at the start of the next line - even though cursor was in ... or end of a previous line. That is for sure not ...TV Pal, odd and even framesI have been researching, but haven't found any real interesting information on this subject, so far. What I mean is, since TV PAL signal is interl…
Maybe the count in R register is different after a few cycles after Interrupt, between odd and even pages, since ULA stops the CPU clock in some situations (accessing screen memory is probably one of them), and odd and even lines have different timings.I feel they could have done this.After reading the ZX Spectrum ULA, I learned about how the ULA detects if the Z80 if going to access memory in the next cycle and stops it if the ULA…
... suggest means that writing the screen will take longer because the ... that changes a lot of screen memory, don't really exist on ... is really slower than normal memory access. Second, is that ... to that particular area of memory.
The hardware ...I feel they could have done this.After reading the ZX Spectrum ULA, I learned about how the ULA detects if the Z80 if going to access memory in the next cycle and stops it if the ULA…
... fast blitting to the screen memory, and even with a ... the Spectrum, reading the screen is basically the most economic ... put (software) sprites on screen. There are other ways, ... a copy of the screen and blitting that buffer ... to the screen at once. So if ...
