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"Floating" AY registersWhile I was working on some AY sample-related stuff, it occurred to me that with the AY port not being completely decoded, it would be a handy CPU-ti…
... (C),B to select AY register 8... provided that the AY ... top 4 bits of the register number.
Unfortunately, it ... />
[i]Selecting an unused register number above 0x0f puts the ... treat these as ordinary AY register accesses modulo 16, as Fuse ... -
BASin Assembler suggestionsHi Dunny. According to your former request here goes a few suggestions. Been playing around with the Assembler and I'm glad I did. Quite nice indeed…
... if you also allowed single register (8-bit) viewing. Not so ... -
[BASin] Bug report and question[B]1. Bug report:[/B] BASIC Editor behavior I'm using a variable to store the contents of the BC register. But the BASIC editor works strangely. I t…
... the contents of the BC register. But the BASIC editor works ... -
Understanding the StackSorry folks. I guess I'm going to be a pain for a little while. Hope it's ok with everyone. I'm currently studying the stack and wrote the little pr…
... the contents of the BC register aren't being printed to ... -
IN 255 behaviour not emulated in Spectaculator and ZXSpinI'm not speaking about "normal" IN 255 behaviour. All of you know what I'm taking about: IN 255 can be used to "read" screen data as it's retrieved f…
... happened, the value at B register was a random value, from ... -
Another idea: 3D models from your favourite Speccy games[FONT=Times New Roman][SIZE=3]Take a look at this.[/SIZE][/FONT] [FONT=Times New Roman][SIZE=3][URL]http://www.shapeways.com/[/URL][/SIZE][/FONT] …
... and were featured in The Register:[/SIZE][/FONT]
[FONT ... -
How does the Speccy deal with the Character Set?Hi All, Can anyone spare a little time to explain to me the basic Assembly method of how the Speccy interprets and retrieves Characters to print on …
... location 23606. Here the 'pointing' register pair is loaded with a ... the set. (i.e. DE register contains 15360. D = 60, E ... -
A tax on violent games?[URL]http://www.telegraph.co.uk/scienceandtechnology/technology/technologynews/4968581/Tax-violent-video-games-tobeat-knife-crime-says-Damiola-Taylor…
... 's on the sex offenders register for ten years. Not life ... years. And even then, the register does nothing.
What ... -
Help! An IP problemMy mate is a member of a well known file sharing site whose name I won't say in case they randomly google for mentions of their name and match this p…
... would want each person to register (and pay the full amount ... -
Laptop monitor gone stripeyI hope this isn't the end of my lappy coz I really can't be without it and can't afford a new one. When I switched it on about 10 minutes ago, alter…
... on about 10 minutes ago, alternate lines on the screen were ... -
The Real Retromaniacs - new website now up and running!Hi everyone. As some of you may have been aware by the link in my sig, The Real Retromaniacs is now officially up and running! You can get to it her…
... feedback is much appreciated. To register and get to the forums ... -
Tips on optimizing some newbie assembly routinesI'm starting to learn some assembly language. The best way to learn is to actually code something you are going to use, so I'm creating a very simple…
... draw (stored on the a register)
; This address is ... -
More on the PCW demiseAn article in the Register (invokes the name of Sir Clive and the Speccy) [url]http://www.theregister.co.uk/2009/06/11/pcw/[/url] And also a retrosp…
An article in the Register (invokes the name of Sir ... -
How feasible is it to add a second CPU to the ZX Spectrum?Today with IDE, and USB, and TCP/IP and other wonderful technologies arriving on the ZX Spectrum, I'm beginning to wonder if we'll run out of CPU tim…
... , put 1 into the "control register", and wait for the CPU1 ... to clear this register again. Maybe this would be ... other values in the control register for this.
Now ... -
Channels and streams - reading dataThe FAQ here - [url]http://www.worldofspectrum.org/faq/reference/48kreference.htm[/url] - seems to be just a touch inaccurate when it comes to readin…
... return "X" in the A register and set the carry flag ... -
SPOT+SPEX magazine index update"This is precisely the sort of thing that no-one ever believes!" Firstly, a correction to the previous announcement. When I said "adding another 40 …
... 2)
* Tidy up the alternate titles x-ref entries. (see ... -
BUG in SZX snapshots ???I create snapshots of same code in ZX emulators ZXSPIN, SPECEMU, SPECTACULATOR, FUSE and one with SNAPCONV convertor. In snapshot is this code: …
... /> Before snapshot saving I set register A to value 1. Probram ... -
Snow on screen of 48K Speccyok you wizards I fixed up my 4116 ram issue as Winston and McLeod advised me before by replacing with 4164's.... all I could find here in Singapore (…
... . it's not the I register or the tuning - as it ... -
AY interface - How many possibilities?Currently the newest AY interface available for sale gives 16K and 48K owners a chance to add AY sound to their Speccy, but (correct me if I'm wrong)…
... between 128K AY, TS2068 AY, alternate AY port config, etc), a ... -
Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…
... 'registers'.
The first register deals with single bytes only ... (single-byte) register is called the A register, sometimes also referred ... a value into a register or register pair.
The ... is different for each register or register pair that is loaded ... -
AY programming and notes frequencyHello everybody, I'm Targhan from the french CPC group Arkos, perhaps you've heard of us. I'm currently working on a music tool and I'd like to k…
... for the 12 bits frequency register), I get the period 3390 ... -
Z80 'EXX' ConfusionI was working on a little Z80 routine last evening, and, having run out of registers, resorted to sticking one of the values into a memory location a…
... bit by using the alternative register bank instead (something in my ... -
TracFone Mobile Phone for $8Maybe this thread is one for out US ex pats. As I visit the US a lot I have brought myself an American pay as you go mobile phone. It was an imulse…
... terminated and you must re-register your phone with a new ... -
New Spectrum Game - Battery's not PrecludedThis year's Christmas release is Battery's not Precluded, a drive/shoot/fly-em-up where the player's vehicle, the controls and the object of the game…
... Yerzmyey (thanks Yerz!) and an alternate palette for the ULAplus, Battery ... -
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…
... image, with timing pulses on alternate frames to tell the TV ... -
Spectranet updateWell, I've not put an update in here for too long, so here's a summary of what's been developing ... * A snapshot manager module. Basically, you can…
Bit functions speedI just stared nonplussed at the documentation for the bit functions. Apparently, if you're using the accumulator, using AND and OR is faster than se…
... , is probably worth setting a register for for maximised speed.
