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Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
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(Thick black and white vertical bars, but almost always with ... connectivity of the data bus lines between the CPU and ROM ... waves on all data bus lines at the CPU.
Famous lines from filmsThe 'Favourite James Bond' thread put me in a Bond type mood, and a workmate just asked me if I'd done something and I responded "Do you expect me to…
... suggest any more well known lines and responses?A z88dk + sp1 demo (with source)Since nowadays people are still wondering about how difficult it is to make something in z88dk, I thought I just put a very simple demo to show how e…
... example. It's about 340 lines and includes comments, assembler code ... pixels
uchar dy; // signed vertical speed in pixels
};
editing strings with INPUT LINEHere's the latest in my unpredictable series of utility routines. This one I needed for the SAGE game editor; it emulates INPUT LINE l$ but with the …
... ).
The vertical cursor enhancement from "joining lines of BASIC" (but ... ;reset lower screen to 2 lines
call $0d6e ;CLS_LOWER
Scrimpy screensHere's a question - how small a window can you get away with as a playing area for an arcade/action game before anyone notices? From the very earlie…
... good aspect ratio for a vertical shmup:
[IMG]http://www ... score display of only 4 lines, but it does look like ...Spectrum 48K help neededI hav got an old Specrtum 48K issue 3. When I plug-in power connector it doesn't show the home screen (c) Sinclair.... From about 50 times trying to …
... . Mostly I have white-black vertical bars.
How can I ... cold. I have checked voltage lines (+5, -5, +12) and ther ...48K and wavy lines.It seems all Spectrum related things are breaking here at casa de Don Pedro. After the problem with my old ZX81, I went over to my issue 2 ZX Spectru…
... think this is the "wavy lines across screen" fault I read ... electrolytic capacitor to see if lines disappear. If so change that ...Very weird +2 problem.After two days, I'm still fighting this grey +2. Symptoms: When I first got it, there were stray pixels on the screen, and stray lines and colours. …
... the screen, and stray lines and colours. The machine ... but not the lines.
Change the electrolytics - lines gone now. ... by black and white vertical stripes, one character wide ... br /> Edit: All address lines, data lines and resistors therein are verified ...Vertical Shoot'em Up's: Humans.Ok. This topic is about those vertical shoot'em up's in which you control a human. Why? Because I say so. It's just a nitpicking categorization. And…
... . This topic is about those vertical shoot'em up's in ...Vertical Shoot'em Up's: Ground Vehicles.Ok, the topic says it all. We're talking about tanks, jeeps, cars, pogo sticks and futuristic vehicles (as in Marauder). There's no really substanti…
... in the gameplay from the Vertical Shoot'em Up's with ... is among the finest Vertical (and non-vertical) Shoot'em Up's ...Vertical Shoot'em Up's: Spacecrafts.what's missing? for updated lists look [URL="https://sites.google.com/site/concealedwords/home/zxspectrumgames/vertical-shoot-em-up-s"]here[/URL]. …
... .com/site/concealedwords/home/zxspectrumgames/vertical-shoot-em-up-s"]here ...The great 128k ConversionWell, I am not sure if it is going to be great. Hopefully it will! This evening, I set about getting my Issue 6A Spectrum Plus working. I suspecte…
... the voltage levels tested. All lines were Ok.
I ... about the electrolytics. There were vertical bars moving horizontally across the ...Bottom 4 lines of the screen fileI'm wanting to save the bottom 4 lines of the display memory (AT 20,0 to #0; AT 1,31) 23168 is the start of the attributes and its length will be 32…
... to save the bottom 4 lines of the display memory (AT ...Spectrum 128K +2 (grey) faulty screenHi. Just got untested +2. Now I only get picture like this (Black screen, with two vertical very thin white lines): [url]http://aijaa.com/Nk93Ub[…
... (Black screen, with two vertical very thin white lines):
[url ...Yet another glitchy graphics 48kHeyo, I'm new both to the forums (sorry if this is the wrong forum) and to Spectra I'm afraid, picked up a 48k from a steam fair sale thingy (not th…
... flashing "K" to drawing vertical red lines on an otherwise blank screen ... try looking at the data lines with an oscilloscope yet but ...Spectrum +2A problemWorking my way through a new influx of greys and blacks i came across one thats got me a little stumped, on boot it goes straight to vertical black a…
... it goes straight to vertical black and white lines, nothing ive tried ...Movin And A Groovin Horizontal Flip improvementOn the left is the flip horizontal portion from Andy Pennell'S excellent Movin' & a Groovin' machine code screen routines from Your Spectrum #19 (Oct…
... is noticeably slower than the vertical one because it has to ... IX,DE ; so all these lines can go
LD DE ...Upper RAM replacement module issues with the DivideI got my new upper ram replacement module from Zorn yesterday and seem to be having some issues. When the machine is without the Divide it boots up …
... the machine I get border lines like the machine is saving ... black border and paper with vertical white lines on the paper area ...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?Extras: scripted lines or talking b0ll0cks?!When you get films or tv shows with scenes with lots of extras in the background - like a restaurant scene, or in a public place, or whatever - does …
... if these extras have scripted lines to say or are just ... unlikely that extras would have lines to learn, but I am ...Tricky ZX RepairHello guys, This time I put my hands on a very nice Issue 3 16K, upgraded to 48K. To bertter explain "nice", it is absolutely mint, not a scratch on…
... of the screen still with vertical red lines.
First checks ...Clearing 22 lines of the screenHow do I go about clearing the top 22 lines of the screen and leave the bottom #0 area untouched? I have a routine to reset the attributes, but cant…
... about clearing the top 22 lines of the screen and leave ... me reverting to PRINTING 22 lines of 32 spaces?Help! +3Just got my +3 working after replacing the drive belt. All was OK until I plugged in my Multiface 3 (known working with a +2a) and the computer went…
... all I get are vertical flashing yellow lines, plus noise (like IM2 ...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 +…
... -around attribute map to allow vertical attribute-based scrolling.
;Use ... /> ;Perform OUT 254 every two lines for 48K sound (at expense ...Help needed with calculating screen addressesCan anyone help me finally crack Jonathan Cauldwell's screen addressing calculator and, more to the point, is the reason I'm struggling because this …
... lines 256 bytes apart, so we again take our vertical ...
ld a,(ycoord) ; fetch vertical coordinate.
ld e,a ... ld a,e ; restore the vertical.
and 192 ; segment ...Something I made in Minecraft...So, this is what I do in my spare time these days (when I'm sure a lot of you will be screaming for me to come back to Speccy-land; I assure you I wi…
... I can with the straight lines and 90? angles of Minecraft ... straight side, but making it vertical is the closest approximation. Where ...Why no PLOT, etc. on bottom two lines?I was pondering if there was any way to get PLOT, etc. to address the full screen from BASIC without having to write a few lines of assembler to bypa…
... having to write a few lines of assembler to bypass that ... commands to the top 22 lines anyway? Why not just have ... , SCREEN$ can address all 24 lines (0-23), so why restrict ... #0 for the bottom two lines?Issue 2 Fuzzy LinesHow can I improve this picture? the colors etc are good but the lines are rather annoying... I'd played with VR1/VR2 but apart from making it nice an…
... etc are good but the lines are rather annoying... I'd ...Vertical XOR filler.. anyone?Hi, I was just wondering whether a vertical filler using XOR has ever been used on Speccy demos/games and if yes when for the first time? Just tryin…
Hi,
I was just wondering whether a vertical filler using XOR has ever been used on Speccy demos/games and if yes when for the first time? Just trying to find some references..z80 assembly helpEver since I was a child I wanted to program my zx81 then my zx spectrum + 2. However, it was such a mystical beast and I only ever used BASIC not kn…
... coords.
ld hl,xcoord ; vertical position.
dec (hl) ; move ... it.
ld a,(xcoord) ; vertical position.
rst 16 ; print ... of y
The lines where I believe I fully ...
