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Some ever noticed that +2A/+3 halts Z80 using WAIT?I mean: Anyone ever noticed that the +2A/+3 halts the Z80 using WAIT? All documentation I've read about contention state that the ULA halts the Z80 …
... mount ULA) uses WAIT to halt the CPU. I haven't ... -
Doubling the Spectrum's resolution?Before the advent of digital, PAL TV sets had a resolution of about 702x576 pixels. It was overscanned (i.e. the edges of the broadcast picture would…
... page with an IM2 interrupt routine, it should be possible to ... -
Implementing goto on error condition...OK, so when I'm reading a file or directory on a network filesystem, when I reach EOF, it's not actually useful at all for ZX BASIC to stop the progr…
... I exit the EOF handler routine. There must be something extra ... -
2 questions about matrix and string handlingI was never good at understanding how to do something random in Sinclair Basic without repeating something that was already done. Had problems unders…
... the hidden words? Does such routine need to check A$ character ... -
Tinkering with Quique Llar?a's Midi2Ay tool...Im tinkering with Quique Llar?a's Midi2Ay tool, found at: [url]ftp://ftp.worldofspectrum.org/pub/sinclair/tools/pc/midi2ay-0.1.zip[/url] Im not a v…
... trying to understand why the routine crashes after the music stops ... like to add a short routine to stop the playing and ... output (just prior the "finrsi" routine)... The Problem is, I don ... can put after this key routine to get it to return ... -
Volunteers for a Speccy news twitter stream?It bothers me a bit that with the slowdown of activity on raww.org, there's no regularly-updated English-language source of Speccy news on the intern…
... a break from your usual routine at all); there's a ... -
some debugger in emulators that is able to brakpoint when a mem address is accessed ?Is there a debugger (disassembler) available in some emulator that is able to stop (breakpoint) when a particular memory address is accessed ? For e…
... other words, to see what routine is responsible for that memory ... -
ZX81 software interupts?One of the ZX81's main improvements over the ZX80 was the NMI, allowing for SLOW mode and therefore animated graphics/games. But I read SLOW mode ra…
... , but use a software interupt routine (just like the ZX80 did ... -
how safe is to edit with Taper a .tzx file created with another conversion program ?My question is if Taper handles all the tzx versions. From [url=http://www.worldofspectrum.org/forums/showthread.php?t=27224]this thread[/url] I und…
... want to edit (enter a pause command) an already existing .tzx ... -
Adjusting your code for screen refreshingOk, I'm aware that I should know it already after writing 5 Spectrum games in machine code but interrupts and screen refreshes were always my weaker …
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If I perform HALT command in machine code, the ... can do:
[B]HALT
Delay to wait from ... -
Req' Help with Random numbersHello all, im new to the forum, i hope im putting this in the right place ... I would like to ask a question in the hope someone will be able to as…
... to write in Basic, a routine that can choose at random ... -
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…
... working on a little Z80 routine last evening, and, having run ... .
I got the routine working, but then wondered if ... , but ran into trouble. My routine would run and apparently do ... -
Need help with interrupts againI'm fighting to understand how interrupts code handling works I'm trying to set my simple own interrupt routine, as I don't want to be dependent on …
... set my simple own interrupt routine, as I don't want ... variables normally and Basic interrupt routine overwrites this memory.
routine does nothing, just returns.
Name that game: loading routineName that game but with a twist. I remember loading a game and it had a strange loading (protection?) scheme. It played normal when loading up initia…
Name that game but with a twist.
I remember loading a game and it had a strange loading (protection?) scheme. It played normal when loading up initially, then it went to a black/red or blue border. Before the leader tone for the loading of the screen ...About wireframe 3d animationAre there any demos or games that have very long 3d animation sequences? Some games have short, repeating animations and I only know of a demo (somet…
... or complex and the drawing routine was faster than the ROM ... using a separate machine code routine? I'm thinking of Sprite ...many scr files to tap fileguys, I know that threads like this have existed in the past, but i'm gonna try to get a video onto speccy. The +3e to be exact. figured i'd use full…
... loading. maybe throw a im2 halt in between each one and ...Question on copying screen bufferHi, Al my prevoius games were copying graphics directly to screen memory starting at 16384. Now I'm experimenting with screen buffer where I could d…
... from buffer to screen after HALT.
Am I doing ...Game & Watch - Fire RC-04The original game. [IMG]http://i432.photobucket.com/albums/qq45/FrankT4/fire.jpg[/IMG] My speccy conversion progress. [IMG]http://i432.photobucket.c…
... bouncing men. And a crash routine now.
Its not ...Making BASIC occupy less RAM?I risk being told to search the forums and the entire archive of type-ins, but here it goes... Is there any known utility to do all the hard work of…
... include a small machine code routine that would load a BASIC ... high RAM, and then a routine in BASIC (yeah, I'm ... using another small m.c. routine to save the modified BASIC ...Print at 128,87? :)The advanced search function didn't help me find the answer to this, and I don't remember seeing anything similar in magazines or books... so please …
... /> Can someone code a small routine that can print a character ... movement.
If such routine already exists, please point me ... />
I'm assuming such routine would limit x to 248 ...Screen to vector?I've found old topics covering this subject and even spoke to Geoff about this, but still want to ask a few questions. I've been playing with vector…
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I'm assuming such routine, either in BASIC or m ...JetSet Willy - Mirrored UniverseHello All, Thought you guys might be interested in what I've been doing the last week or so. Using the following documentation: [list] [*][url=htt…
... run a z80 map reversal routine before running the game.
The routine performs a rewrite of the ...Converting games from tap to dskHi to all from Greece, Being an old Speccy user and now owner of most models of Spectrum (48k , 48k+ , 128K, +2 grey and +3) , I desided to salvage m…
Star Wars scroll/crawl/title effectI may have seen this type of scroll on a Speccy game before, but I've never seen it as a type-in or part of a cover tape. Does anyone know how to do …
... find a ready-to-use routine? I tried infoseek and the ...Cyberbig (Animagic S.A.)So, on dm_boozefreek's semi-recommendation (he's bored of it now) I've been playing [url=http://www.worldofspectrum.org/infoseekid.cgi?id=0010481]Cyb…
... disks collection display on the pause screen, there's a high ...IDE emulation and delaysA few months ago I was told that IDE emulation, while perfectly usable, isn't accurate enough to compare it to IDE access on real hardware. On some e…
... a multiple sector read (the routine requests 256 sectors at a ...Searching inside magazine contents?Our friends in Spain have a search engine specifically created to find anything that was published on their main Speccy magazine, Microhobby: [url]h…
... find a particular segment, interview, routine, hardware project, news, etc. Is ...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…
... library, such as a resolver routine (gethostbyname, to convert a hostname ...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…
... a few hundred bytes of routine still; and finding a way ...IF1 and 48k Capacitor QuestionsHi, I am not very knowedgeable about electronics but I am willing to give stuff a go.. I have a microdrive that is not performing and for various r…
... will go through the format routine - flashing border, but when it ...
