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Running code from the display memory?Is it possible to run machine code from the memory area used by the display file? If you were really out of memory and some part of screen is not u…
... 48K/128K has two uncontended cycles per eight cycles during ULA display ... more cycles per frame and no additional contention hits on performance ... machines.
The 48K/128K machine's ULA responds only ... is off so it causes no more contention on the ULA ... -
How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…
... graphics? Is it no make sure no updates to the screen ... new). The 128k specs have that second display buffer available so ... you'll also see no tearing. On a 48k ... to its extreme -- the display is divided into 8x8 ... to screen. There is no flicker on screen and ... -
Emulator Comparison ChartHi. In a similar vein to [URL=http://www.ppest.org/zx/zxse.php]Piters[/URL] comparison of various ZX emulators, I've been looking at adding some deta…
... test. For memory contention and display timings, Shock Megademo Part II ... (try in all of 48K, 128K and +2A/+3 mode).
no publicly released emulator (except possibly ... -
In a 100 years time..When we're all dead and buried (or cremated depending on your preference) and there's no more people around who actually HAD a ZX Spectrum do you thi…
... The computer had a colour display and had poor sound.< ... of course put on display along side the ZX ... the ZX Spectrum had no 3D holographic capabilites, and ... a "Television set" to display its picture. Further down the ... type Spectrum called a 128k but not one has ... -
GP2X or DS: which is best for the speccyHi - just joined but have been reading posts for years and I know ye are as passionate about the Speccy as I am! :-) I've waited so long to buy eit…
... has no 128k emulation as yet, and no room for a border - the display ... 's AY emulation renders most 128k games unplayable for me, so ... the lack of 128k on the DS is not ... 's stick has given me no problems at all in any ... -
how is real spectrum used?I have just downloaded real spectrum for use on my win XP. I have read the info but still have got problems. 1) If I remove the 128k rom there is a…
... /> It runs in 128k mode but has the display problem above the ... this out.
The 128k mode indeed has problems with ... written to the border area, no doubt due to timing differences ... side. No doubt this would also happen on real 128K hardware.
Problem with CBSpeccyFirst my config: Amiga 1200, OS 3.1, 68030/50Mhz (with MMU), 16MB Fast. I tried to run 2 versions of "CBSpeccy" (0.24b and 0.25b). Emulator works bu…
... mode but slows down in 128k mode. Maybe BlazeWCP will give ... set to mono,
screen display, frameskip 2.
ZX ... AY sound so... there is no need to run it again ... -fashioned: it doesn't emulate 128k models and it only supports ...7 to 9" TFT screen on SpectrumI'm willing to buy one of those and connect the Spectrum via the Composite Video input. Has anyone tried that? What kind of image quality may be expe…
... it wasn't able to display a complete Speccy screen at ... as a 640x480 PC monitor. No problem with the Spectrum resolution ... in place next to a 128K+ Spectrum. (Don't get confused ...7 to 9" TFT screen on SpectrumI'm willing to buy one of those and connect the Spectrum via the Composite Video input. Has anyone tried that? What kind of image quality may be expe…
... it wasn't able to display a complete Speccy screen at ... as a 640x480 PC monitor. No problem with the Spectrum resolution ... in place next to a 128K+ Spectrum. (Don't get confused ... ' mode?
'just' seems to display all pixels on mine...Emulator for Vista & Sony Ericsson.Can you please advise what are my options for a Spectrum Emulator which is compatible with Windows Vista? I used to use ZX32 when I was on XP. Also…
... play games?[/QUOTE]
No, I'm using Speccy by ... neat emulator that features 48k, 128k and +3 support. It also ... to use portrait or landscape display modes for phones that support ...Alternative Fairlight 2 loading screen!Here is a little puzzle: Do you know where this [URL="http://www.rickardberglind.se/zx/fairlight2.jpg"][B][COLOR="RoyalBlue"]Fairlight 2 loading sc…
... no one found the solution!) :smile:
When launching the 128k ... it could be interesting to display it here.Alternative Fairlight 2 loading screen!Here is a little puzzle: Do you know where this [URL="http://www.rickardberglind.se/zx/fairlight2.jpg"][B][COLOR="RoyalBlue"]Fairlight 2 loading sc…
... no one found the solution!) :smile:
When launching the 128k ... it could be interesting to display it here.[/quote]
Blown standard divideI recently bought a SIY divide kit from Papaya labs and after i soldered everything, it worked perfectly. I've used it 5-6 times without problems (Fa…
... burning the power circuit transistor because this transistor is only for +12V ... a ROM chip doesn;t display any picture, so if one ... is behaving like it has no rom on it?
So lets examine the "no picture" with the divide on ...New utility - Arcade Game DesignerNo income tax, no VAT, no money back, no guarantee... In advance of SEUD's release I thought I'd release AGD to get people in the mood for game maki…
... caused an access violation in 128k mode on Spin too, which ... =mulder;262041]How can I display lives left?[/QUOTE]
no facility to display numeric values at the ...Wanted: RGB to RCA for +2AI bought a +2A that, according to the seller, might have a problem with the modulator. When it arrives, I would like to try using the RGB output. The…
... buffering it with a single transistor amp (like the boards death ... made) but no joy at all :s[/QUOTE ... of the modulator of any 128K is a mix between video ... the sound)
In +128K and +2 grey there isn ...Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …
... BIT FADE test - with barcode display on screen. However, the test ... screenshot below).
Still no 128K support, but this one now ...128k heat sink - ULA problems and a hintHello, I had two ZX Spectrum 128k with a similar behaviour. One item worked only a short time after switching on and then there were increasing RAM …
... -press themselves with little or no phsicaly pressure placed on the ... be an issue on a 128K machine, it might be on ... regulator using a TIP3055 power transistor as a buffer amp, but ...Hi-colour gamesDoes anyone remember some of the games that used something called Ho-colour? Like the options page on the Agent X games, and a few others. If memory …
... alter the speccy's attribute display memory just ahead of the ... as I know, pentagon has no memory contention (well, I might ... like this on a regular 128k:
[img]http://www ... a regular 128k?
and why there is no demo on ...ANN: Spud v0.202bJust a minor update as I've added drag and drop support as requested by Arda. Enjoy!! [url]http://homepage.ntlworld.com/richard.chandler2/Spud20090…
... bottom left of the status display on emulator) seems to ... , it *is* possible to display numbers greater than 255 by ... this intentional?
[/quote]No, oversight and insufficient testing on ... didn't expect to see 128k emulation, excellent sound reproduction, ...Where's the border line between a Spectrum and something else?I mean: there are purists out there that consider that anything that is not a true Sinclair Spectrum, with a true Z80 and a true ULA, and at most, 48…
... the shadow screen present in 128K Spectrum's because "it ... because I have no idea how the 128K works, and I ... I may stray onto 128K if I get stuck at ... have a Speccy that can display orange), higher resolution? If ... this off with the original 128K, so I'll consider ...Where's the border line between a Spectrum and something else?I mean: there are purists out there that consider that anything that is not a true Sinclair Spectrum, with a true Z80 and a true ULA, and at most, 48…
... ]I have no idea why I've settled on the 128K as ... choice.[/QUOTE]
The 128K is also my platform of ... not.
[*]The extra swappable display memory is so HOT.
More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... horizontal resolution fior a display size of 512x192 pixels. ... display mode that was later differently implemented in the 128k ... spectrum.
There is one obvious and simple display ... pixel. This would mean no colour clash 256x192 resolution ...Another set of USA newbie ZX Spectrum questions.So yeah, I'm considering getting a ZX Spectrum 48k pretty soon, but since I'm not in the country of origin, I have a few questions about it. First, …
... .[/QUOTE]
There is no Scart socket here, only in ... or big LCD tv as display, either in windowed mode or ... power up the 48K and 128K. It also works with the ... ) and the RCA for the 128K and +2A. I use the ... (RGB-to-RCA) for the 128K and for the +2A I ...Memory concerns with z88dkI've retaken my old spectrum project and sadly I've reached a dead end very fast. I'll try to explain my worst problem in a few lines. I'm not a vet…
... to manage the full 32x24 display but it doesn't have ... +sp1 project with optional future 128k music to maximize available memory ... /> #asm
di ; make sure no ints occur while we make ...ULA Plus and Interlace.May be a bit late to suggest this, but here goes. Did the original Speccy ULA actually output a proper PAL interlaced image, with timing pulses on a…
... .
An interlaced computer display generally "jitters" due to the ... want is the ULAPlus to display alternate frames from different memory ... frame 1 so there is no jitter. What you'd see ... as is done with the 128K?
Edit: I see ...ULA Plus and Interlace.May be a bit late to suggest this, but here goes. Did the original Speccy ULA actually output a proper PAL interlaced image, with timing pulses on a…
... want is the ULAPlus to display alternate frames from different memory ... frame 1 so there is no jitter. What you'd see ... as is done with the 128K?
Edit: I see ...Is there any video input on expansion bus?Imagine you want to build a custom display hardware, for instance, to add hardware sprites to display. Is it possible to design such a device so that…
... is written to the normal display file and use that in ... generating its own display.[/QUOTE]
Mmmmm.... I ... with non contended memory, and no VRAM data at all in ... RGB signals if using a 128K model. I would suggest for ...Speccy Laptop on Ebay[url]http://cgi.ebay.co.uk/Sinclair-ZX-Spectrum-48K-128K-Laptop-Boots-DOS-Emulator_W0QQitemZ110502786311QQcmdZViewItemQQptZUK_VintageComputing_RL?has…
... Sinclair-ZX-Spectrum-48K-128K-Laptop-Boots-DOS-Emulator_W0QQitemZ110502786311QQcmdZViewItemQQptZUK_VintageComputing_RL ... it, it can only display he sides of the ... resolution, and there was no ghosting or blockiness. It ... , though it had no 3D hardware support and ...Midi out on a ZX SpectrumYears ago (may be over 15 years...) I soldered a small adapter that lets a keyboard or synthesizer connect to the ZX Spectrum 128K's midi/RS232 port.…
... port on a ZX Spectrum 128K heatsink model to send data ...
