-
[Asm] Is this nested loop faster than LDIR or a bunch of unrolled LDI's?Hi all. I'm learning Z80 asm on Speccy 48K, and to start with I decided to write my own "CLS" routine (without relying on ROM calls or LDIR) as a lea…
...
xor a
out (254),a
ld (stack ...
ld a,7
out (254),a
jp start
The OUT (254),A instructions are there just to visually indicate how long ... -
Two different versions of Bruce Lee?There's a possible MIA here, I think. I sat down at lunchtime to play a bit of Bruce Lee and discovered that the version I'd downloaded from WOS (th…
... ]
Sorry, it came out all wrong. I didn’t ... business. I did figure out how Speedlock 2 works (well, sort of), but ... -
Utility to read/write to memory cards formatted for +3EThis post comes from [url=http://www.worldofspectrum.org/forums/showthread.php?t=25658]this thread[/url]. I've released a small command-line utility…
... to figure out how to make a partition, check how the program works, before ... -
BasinC can accept Intel 8086 assembler inside REM-linesIn the year 1983m the firmware "ACS SOFTWARE" develope basic-spectrum with REM+assembler Finally, here are two sample routines you might like to try…
... no idea how a computer works, and sometimes they just missed out some ... -
IN instruction on emulatorsHi everyone I wrote: 10 PAUSE 0 20 PRINT IN 63486 If i press 1, result is 190 instead of 254 (i used FUSE and Spin) If i press 2, 189 (253) i…
Sorry, I meant bit 6 (value 64) when refering to EAR.
By the way, using BEEP in the program restores this bit 6 to zero, so for checking the IN values refered to 255, include OUT 254, 247 just before reading IN. I did it and it works. -
Understanding tape edgesI've never done any tape reading code. But I've read about these "edges" on multiple occasions. Trouble is I don't understand what they heck they are…
... to a tape. Tape only works with a changing (AC) ... s circuitry and fundamentally how magnetic media works. Digital data on ... whether the signal coming out the tape recorder will ... need to do is find out how long it takes to ... and you can figure out whether it's a ... -
Corona Virus,Is is me or is the BBC sensationalizing this corona virus too much and creating hysteria?
... not in television engineering) how a TV works. Most people don’t ... person who dies and carry out a full autopsy, we will ... scenario has long been ruled out by hardly spectacular death rates ... think politicians want to bail out companies with extremely large amounts ... -
Corona Virus,Is is me or is the BBC sensationalizing this corona virus too much and creating hysteria?
... its PPE in-house, cut out the middle man?[/quote]
out via preferred bidder system. It ... seems like we have gradually out-sourced some things that it ... . I don't know how "prefered bidder" works but probably its not ... -
The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... , but does anyone figured out how/why Disciple works on 128K ?
how this may be possible ? - because ... -
A Sunday grumbleGIVE IN & DROP OUT OR WHAT? The following is not a sensible message meaning that I'm not necessarily going to act upon what the title suggests, I'…
... of getting something SPECtacular out of my Next when ... org/forums/discussion/57924/how-to-write-a-simple ... responded when someone put out a request for aid ... have to learn how the Spectrum works, how the screen is ... built up by bytes, how ... -
Strange Microdrive format.Hi all, I got a new (old?) cartridge today and it's called "ArchBak" and just ran forever in my Spectrum when I did a CAT. However when I looked d…
... to continuous transfer, and that works nicely with the Spectrum/IF1 ... /> I'm trying to work out what chunked data transfer is ... to hear more about how your system works.
Did you ... -
Windows 11 - It's commingJust when you thought that there was going to be no more new versions of Windows, a recent leak reveals Microsoft are due to announce Windows 11 soon…
... a look. I always wondered how Stardock could do this but ... - after all they know how their OS works and should be able ... things. The number of apps out in the wild that do ... -
Climate ChangeI have listened to both sides in this debate. But I cannot help feeling a bit skeptical at times still. I think both sides are getting it a bit wrong…
... universally accepted understanding of how a system works), then the output will ... .
To test how good the model is, we ... of the climate, and how the planet works environmentally. And because ... as hard as is made out. The difficulty is that ... -
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... if you can understand how my code works (you'll need to ... byte lookup table to work out the screen address instead of ... make a version of text out that wraps at the edge ... -
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... if you can understand how my code works (you'll need to ... byte lookup table to work out the screen address instead of ... make a version of text out that wraps at the edge ... -
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... if you can understand how my code works (you'll need to ... byte lookup table to work out the screen address instead of ... make a version of text out that wraps at the edge ... -
Do this names sound familiar ?Hello, Since i found WOS (about 2 months ago), i've been looking around for tapes with 48K software. I found some titles, that i've runned on Infosse…
... think that this explains how an engine works)
Amplify
The ... -
Speccy machine code info where is it?Recently I've been trying to learn Z80 and I've managed to make limited progress (some of my routines even compile now!) but I seem to be having trou…
... want more info on how the screen works and stuff like reading ... -
Spectrum on the phone!I've been using ZXBoy Spectrum emulator on my Nokia 3660 cellphone for a while now and I must admit that I'm somewhat surprised how well it works. Bi…
... I'm somewhat surprised how well it works. Biggest problems are controls ... -
help with zynaps explanationhas anybody idea how exactly Zynaps works ? it seems that sprites are overlayed by background. are sprites putted first and then background is drawed…
has anybody idea how exactly Zynaps works ?
it seems that sprites are overlayed by background. are sprites putted first and then background is drawed or what ? -
ZX80 - it wont die.The Mighty Dope Throne's ZX80 cgc entry has got me thinking. Does anyone know anything about how the zx80 works internally? is it very close to the z…
... anyone know anything about how the zx80 works internally? is it very ... memory. Can anyone explain how this actually works? This may not be ... binary function in the emulator, how am I going to go ... -
Bards tale played on emulatorGreetings o' wise and venerable spectrumites. I just downloaded The Bards tale from this excellent site and Im wondering, can you load the other dun…
... bit stumped as to how it all works.
Please help me ... -
ANN - ZXSoftware Update 29/11/05The following titles have been updated or added. Around another 400 games have been mapped to the emulator. Your milage may vary on how well this wo…
... milage may vary on how well this works but please post any ... -
Mutliplayer network gamesI know this subject has been covered before, but mostly in discussion of creating either remakes of old multiplayer games to allow online play, or ne…
... without researching more exactly how it all works, but I think it ... -
I'm thinking of getting myself a Playstation 1or pureisuteishon as the japanese say So do I go to these gamestation shops that sell them for 40 odd quid or should I look on ebay? I've never done…
... I don't know how internet shopping works or how safe it is ... -
Well I'm excited, but I guess you might not beHehe this is as far as I got today, a silly little border program: [PHP] ORG 32768 PROGGY: LD C,255 ; We loo…
... at pen 15
BORDERDOWN: OUT (254),A ; Put pen colour to ... not zero, loop.
BORDERUP: OUT (254),A; ; Put pen colour to ... I missed a few lines out while I was trying to ... -
MIC - socketQuestion : is the mic-socket buffered? Or: When I make an OUT to port 254 is the signal still there after the command or only during the OUT? w…
... /> When I make an OUT to port 254 is the signal still ... command or only during the OUT?
what i mean ... /> Must I reset the OUT 254,1 with a OUT 254,0?
