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BUZZSAW+ Demo No. 3Right, another demo of BUZZSAW+. [URL="http://www.joefish.co.uk/speccy/Joefish_Buzzsaw_Demo_3.tap"]Joefish_Buzzsaw_Demo_3.tap[/URL] The default con…
... variable depending on the speed and the wow/flutter of a ... seen loaders that run in im2 and set a register (IY in ... the case of MDA Demo and Song in Lines) then count ... -
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... check if PC points to HALT instruction and, in such case, increment ... execute are: LD A,B and HALT. Of course LD causes PC ... gets accepted and because CURRENTLY PC does point to HALT, it gets ... would come and go, then a HALT would be executed and finally after ... -
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…
... CPU will just get confused and HALT probably.
[i]Don ... look at a soldering iron, and with that many pins the ... -
Maritrini and Cray 5 loading problemsHas anyone else here had issues loading either of these on a 128k? No matter what I try, both these games refuse to load properly. I can get both t…
... game has finished loading and I RANDOMIZE USR 32768 ... br /> - The game works in IM2 and the standard ISR is not ... in, WYZ player called, and RAM0 paged back in. ... This happens in each interrupt and takes little time, so ... I DI before switching and EI after doing it.< ... -
Most accurate timingWhich emulator is closest in timing to an actual (48k) spectrum? A count to 10,000 loop, printing the loop number each time on screen - same snapsho…
... the sound routine, IM2 - and put in a tiny IM2 routine that does ... nothing but save state, increment the clock and ... too badly at all, actually - and means the clock stays accurate ... sound routine instead of EI and done... -
In Java for ZXHi All I am glad to notify you that I have opened the sources of my J2Z80 translator (0.1 version) which allows to use Java toolchain to generate Z8…
... areas, arrays and objects. Descriptions and labels can be ... in the interface sources and their native implementations.
Interruptions and HALT usage
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... programs, so that HALT can be used too ... -
The need of having a 257-byte table for IM2 routinesThis came from a discussion at the speccy.org forum. I have understood that the reason behind the 257-table for IM 2 routines is due to certain joys…
... ]
Probably single digit and quite likely that digit is ... hw may come out using IM2 and you can't be sure ... -
The need of having a 257-byte table for IM2 routinesThis came from a discussion at the speccy.org forum. I have understood that the reason behind the 257-table for IM 2 routines is due to certain joys…
... hw may come out using IM2 and you can't be sure ... code during INTA cycles if and only if you are the ... -
recovering the stack after an errorMy normal error handler starts with the stack as reset by LD SP,(ERR_SP) in $0053 ERROR_2, sets up some stuff and returns to BASIC via a "JP C,$1e73 …
... .
I tried using IM2 and setting up an interrupt routine ... while interrupts become enabled again, and eventually an interrupt call pushes ... , overwrites the error return address and it all goes wrong again ... -
Getting PC into HLHello, here's a conundrum for you... Is there a way to obtain the value of the PC register (say into HL) without using absolute addressing such as C…
In fact what you could do is enable interrupts and HALT. Immediately after that you can get the address that it returned to. This way it will work with any ROM without having to worry about safe entry points etc. -
Keyboard scanning routines / techniques?What keyboard scanning routines or techniques do people use? I'm looking to write something which doesn't rely on the ROM-based keyboard scanner, an…
... vger) for other Sinclair machines and modern extensions (IDE, ethernet...) ... ) which multiplexes this line and adds redundancy mechanisms (CRC ... two versions - in RAM using IM2 and in ROM.
... primitives, Kempston mouse driver and simple font engine. I ... -
The Official Crap Games Competition 2013 Thread!Just to announce that the 2013 CGC is OPEN! [IMG]http://i1142.photobucket.com/albums/n608/daveyboyhughes/cgctitle2_zps77591934.jpg[/IMG] And for th…
when you die in a crap game it should always play the funeral tune, and halt the game while its playing of course -
The Official Crap Games Competition 2013 Thread!Just to announce that the 2013 CGC is OPEN! [IMG]http://i1142.photobucket.com/albums/n608/daveyboyhughes/cgctitle2_zps77591934.jpg[/IMG] And for th…
... always play the funeral tune, and halt the game while its playing ... ;713579]I'm still alive and checking in on this thread ... -
display file addressing; screen slicingWhile working on this Compendium I'm updating or rewriting a lot of stuff. One thing I eventually came to appreciate was the simple & clever way in w…
did they use IM2 and a jump table to start drawing sprites ? -
display file addressing; screen slicingWhile working on this Compendium I'm updating or rewriting a lot of stuff. One thing I eventually came to appreciate was the simple & clever way in w…
[QUOTE=slenkar;726974]did they use IM2 and a jump table to start drawing sprites ?[/QUOTE]
Often they just used the floating bus to determine when to write to the screen. -
New Game: GENEHTIKA newer game from Monty Designs (again). [IMG]http://webperssonaldesign.com/webs/zxspectrum/images/ending.png[/IMG][IMG]http://webperssonaldesign.co…
... in a special mode called IM2 and need a relatively big data ... a specific memory address, and such memory address is usually ... export assembly from beepola and there's a "IM2" anywhere in the ... z88dk requires, commenting EIs and DIs, and making the entry point ... -
New Game: GENEHTIKA newer game from Monty Designs (again). [IMG]http://webperssonaldesign.com/webs/zxspectrum/images/ending.png[/IMG][IMG]http://webperssonaldesign.co…
... in a special mode called IM2 and need a relatively big data ... a specific memory address, and such memory address is usually ... export assembly from beepola and there's a "IM2" anywhere in the ... z88dk requires, commenting EIs and DIs, and making the entry point ... -
Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…
... [/URL] (previously converted with tape2wav and then recorded as audio track ... on CD) in real hardware and have the same symptoms. :confused ... main menu. Original code use IM2 and bad value of register I ... . Now I use IM1 mode and correct register I value but ... -
External Z80 CPUHi Looking for some advice if possible. Many years ago I had a plug-in board for a Spectrum 48k which had a couple of switches, a z80 CPU, and a S…
... t connect /BUSREQ, /BUSACK, /NMI, and /HALT on the external CPU to ... ;-)
All the address and data lines connect to the ... address and data lines on the ... these lines between your circuits and the edge connector to provide ... -
z88dk v1.99A Release Candidate[b]Z88DK VERSION 1.99A RELEASE CANDIDATE[/b] Download from: http://nightly.z88dk.org/Releases/ The release candidate will be available for te…
Are im2 and balloc libraries available with the new clib? -
z88dk v1.99A Release Candidate[b]Z88DK VERSION 1.99A RELEASE CANDIDATE[/b] Download from: http://nightly.z88dk.org/Releases/ The release candidate will be available for te…
[quote="reidrac;844473"]Are im2 and balloc libraries available with the ... the table size is 0 and the table is not created ... ]
Anything using sccz80 and the classic c lib should ... -
Further Adventures of Axil the Able?Looking at some of the stuff regarding top graphic adventure "Heavy of the Magick" I noticed that two further adventures were planned but not produce…
Ah yes - the type ahead and "Halt" to stop your action were a cool idea.
Is there a way of deleting individual characters when you're typing? To correct mis-spellings? I recall the delete key just wiped out the whole command. -
A moron asks a question about Multiface POKEsI've just got a multiface, and I want to type in a poke for a game that goes like: POKE 36301,201 How do I do that? In what way do I use the multifa…
I know that joke was a BIT poor :)) (sorry! I'll STOP and HALT now...)
[b][i]Mark[/i][/b] -
Interrupt routineI have been trying to create an interrupt routine for playing AY music in the background but cant seem to get anything working. I have a music rou…
... generate the vector table, and your target address won' ... one won't occur. And HALT will lock things up if ... Then you do EI and HALT in your main program ... synch to an interrupt, and have all the functionality ... EI immediately followed by HALT is guaranteed not to ... -
ZX GameDev tools consolidatedHello WoS! It's been a while, yet with a plenty of decent gamedev tools (including new ones!), is there a [i]single/pivot table[/i] or some datash…
... eventually get into 3D graphics and
[spoiler]interestingly ... higher level language, compile and run with good performance ... or disable interrupts, use IM2 and so on. More generally, ... added performance penalties, restrictions and uncertainity. ... I wonder ... -
ZX GameDev tools consolidatedHello WoS! It's been a while, yet with a plenty of decent gamedev tools (including new ones!), is there a [i]single/pivot table[/i] or some datash…
... enable or disable interrupts, use IM2 and so on.
[/quote ... raster and have their engines installed first on an (im2) ... added performance penalties, restrictions and uncertainity. ... I wonder ... that control enemy behaviours and whatnot and these are much ... -
Communal Project for ASM NewbiesHi Folks, I tend to learn best by trying stuff and then going through the pain of it not working so that I can research and fix mistakes. I suspec…
... that yet. I'm using IM2 so it's nominally running ... example if you are using im2 and your own interrupt routine, it ... leave the system variables area and IY alone anyway. -
Communal Project for ASM NewbiesHi Folks, I tend to learn best by trying stuff and then going through the pain of it not working so that I can research and fix mistakes. I suspec…
... .
I am using IM2 and have my own interrupt handler ... -
Super Wonder Boy antimultiface[url="http://bizzley.com/"]Bob Pape's book[/url] mentioned that Rob Hylands put Multiface protection in Super Wonder Boy. The program can detect whe…
... a very tight timing loop and expecting an end-of-frame ... . :) Just set up a temporary IM2 and calculate the remainder till the ...
