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Address bus contents (i.e. PC) during execution of HALTI'm wondering if anyone can tell me what's placed on the address bus during execution of HALT, beyond the initial M1 cycle. The Z80 user manual state…
... the instruction after the EI instruction." Setting IFF1, ... probably unreversible by following EI instructions. But this ... leave the behaviour of 'EI EI' undefined, and they're ... and over until an int occurs. That kind ...
What we do know is that the opcodes ... -
Testers for new z88dk clibA long (long, long, long) time ago a few people offered to help test the new clib in z88dk. Much time has passed since then and I won't hold people,…
... s something you want to do, run the makelib.bat ... [code]
extern int Add_X_Y(void);
int X, Y;
do:
[U] ... ioctl(fd, IOCTL_OTERM_SIGNAL, bool); // enable signal sound
ioctl(fd, IOCTL_OTERM_BELL ... -
Basic BASIC help needed RNDHi all, I have recently re-discovered an old program I wrote in the early 90s which would do generate random lottery numbers. I know little now, an…
... ]
20 LET p=1+INT ((RND+1e-5)*(99-1e ... IIRC it had something to do with whether the value was ... -
Z88DK NOOB cplot INK colorHi I am a complete NOOB with Z88DK, I am trying to draw colored circles. How does ink, paper and border work with Z88DK. I started trying to wo…
... .h" (classic) that will do just about anything you want ... __CALLEE__ spec_plot(unsigned int x, unsigned int y, unsigned int attr)
... __CALLEE__ spec_plot(unsigned int x, unsigned int y, unsigned int attr)
... code like "di" or "ei" so that these things ... -
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…
...
#pragma output CLIB_FOPEN_MAX = -1 // do not create open files list ... )
{
unsigned int p;
unsigned int i;
p ... -
Need help with keyboard scanning ?After getting frustrated with learning ASM for a while I'm back into it. The little listing below is using the ROM's PRINT AT routine to draw me a sp…
... /> An interrupt is an electrical signal on a dedicated pin of ... CPU can be instructed to do something.
You already ... ]nterrupts), and enable them by EI ([b]E[/b]nable [b ... [/i], which can do anything you want it do, instead of relying ... -
Witchcraft: Nirvana, Bifröst and such[url="http://www.rgcd.co.uk/2011/10/buzzsaw-zx-spectrum.html"]"When considering this next to nearly every other ZX Spectrum game though, Buzzsaw is l…
... different requests on the interrupt signal, but on the Speccy it ... arse.
What you do is fill a table starting ... set IM2 and enable interrupts EI. Now when an interrupt occurs ... interrupt routine you have to EI to enable the next interrupt ... -
Witchcraft: Nirvana, Bifröst and such[url="http://www.rgcd.co.uk/2011/10/buzzsaw-zx-spectrum.html"]"When considering this next to nearly every other ZX Spectrum game though, Buzzsaw is l…
... instruction - or at most an EI and a RET.[/quote]
INT[/b] signal is present on the Spectrum ... -
do you think games are..............do you think games are just as playable now as when the first one's came out on the spectrum? [img]/__forums/images/smiles/icon_smile.gif[/img] octa…
do you think games are just as playable now as when the first one's came out on the spectrum? [img]/__forums/images/smiles/icon_smile.gif[/img]
octave -
your favourite adventureWe all must have played text adventures on our speccys,i loved them even tho i only ever finished about 3 in my life. Anyway what was your favorite t…
... />
Robin of Sherwood (adventure int) completed
Espionage island (Artic ... brides software) still trying to do it nows
Subsunk (Firebird ... -
Help making TZX filesHi. I've just found about 10 games that are missing perfect copies and i've tried using maketzx but i can't do it. When i run it it says 'searching …
... maketzx but i can't do it.
When i ... 't know why. The tape signal is good and loud and ... -
Replacement Modulator for a issue 4 board Spectrum+???Anyone know where I may procure such a thing??? The one in my current machine starts up with the picture tearing and fading (As if the composite sig…
... fading (As if the composite signal is being mixed just out ... being(I was going to do this anyways but would like ... -
Questions about +2The Spectrum +2 has a built in tape recorder. As I am about to put my hands on ony of those, I have a few questions: first, the +2 power supply the s…
... -in recorder to record a signal coming in from the MIC ... if the +2 one could do.
Thank you ... -
NTSC MONITORLast year I bought a +2 at eBay. I live in New York, USA. I had a +2 when I was in Portugal (6 years ago). I posted a topic here and 2 persons told m…
... me how to make a signal that would work in a ... be done). Finally, can someone do a cable or card for ... ($$$$) that would send a NTSC signal from the TV output or ... that those TVs accept any signal. -
which do you prefer using?which in your opinion do you prefer using and why? a:emulators b:zx spectrum octave
which in your opinion do you prefer using and why?
a:emulators
b:zx spectrum
octave -
What other 'retrotech' are you into, what hardware do you own?I suppose talking about machines, hardware & software other than Sinclair is off-topic, but my retro collection was kick-started at WoS! I had heard…
... the things on my 'to do' list, is to write a ... what I am going to do. Heh - I submitted a short ... -
How do i start with all of this?Having just come across this spectrum revival I am totally confused about how to run games on my mac (G4). I've downloaded the Spectacle 1.9.7 emula…
... simply downloaded off the net? Do i have to record the ... -
What Spectrum games do you play most, currently?What Spectrum games do you play most, currently? Mine are: -Match Day -Match Point -Decathlon
What Spectrum games do you play most, currently?
Mine are:
-Match Day
-Match Point
-Decathlon -
which do you prefer?...............hi there, which do you prefer? a real spectrum or an emulator and why?
hi there, which do you prefer?
a real spectrum or an emulator and why? -
what games do people?...............what games do people like to play the most on the spectrum? (platform, racing, adventure, shoot'em'up etc)
what games do people like to play the most on the spectrum?
(platform, racing, adventure, shoot'em'up etc) -
Speccy +2 RGB to S-video?Okay, so I emigrated from dear old Blighty to a land rather less Speccy-friendly, the USA. I've finally managed to get a couple of Speccies over here…
... . Naturally, using an RF (PAL) signal is not high on my ... of doing this, if the signal can be sent to an ... ?
2) If so, how do I go about it?
Short Z80 QuizQ1) Which program gives different result ? A) XOR A ADD A,A B) XOR A ADC A,A C) SCF ADD A,A D) SCF ADC A,A Q2) What is the equivalent of NEG …
... /> HALT
EI
RET
Q7) Why do you need ... mine) ?
Q10) How do you create 'snow' ?
How do you download?Oooh! Haven't been here in a while... Hi all... No, this is not a rudimentary surfing query. I was wondering how people use retro archives like WoS e…
... seeing.)
How do you use these archives? Do you spend days ...How often do you visit this forum?I was just wondering how often do you come here to read the forum... I'm my case, I'm a regular visitor, almost everyday. Well from monday to friday …
I was just wondering how often do you come here to read the forum... I'm my case, I'm a regular visitor, almost everyday. Well from monday to friday at least, as for the weekends, I'm mostly off the house.ZX PC Interface : The manual, schematics and more info... ZX <-> PC Interface ------------------- Contents 1) The ZX <-> PC Interface 1.1) What is it? 1.2) What does it do? 2) Install…
... /> 1.2) What does it do?
2) Installation
1.2) What does it do?
Through a serverprogram ...
The ROM will do syntaxchecking for the PRINT-instruction ... /> C-choice. The info sent int the string can be used ...how do I use the z80-400.zip emulatorI'm probably being thick but I want to play an old game I loved called Gothik. I've downloaded it, together with the z80-400.zip emulator but I can't…
... in plain English what to do?
[ This Message was ...Ok, what specs do people run SPIN on?Hi all, Assuming that you do use ZX Spin, we'd like to get an idea of what kind of machines it's being run on, so we can get an idea of which pro…
... all,
Assuming that you do use ZX Spin, we'd ... CPUs.
So what do you use?
Thanks ...No picture from my Spectrum +2I just got my hands on a ZX Spectrum +2 but I'm having problems getting a picture through the RF port. I get a really faint signal (like watching TV…
... /> I get a really faint signal (like watching TV without an ... , Nintendos and Commodores and I do get a slightly different (but ...
