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[Updated] RetroVM 1.0.4 with Recreated ZX Spectrum support.A new version available the change log: - Recreated ZX Spectrum "game mode" keyboard support. - Fix a bug with multiples machines running in para…
... frame. So if the keyscan routine runs in the second half ... be seen during the next interrupt.[/quote]
I like ... -
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…
... #FF routine triggers, then just pause that amount after interrupt using a ... be reliably replaced with timing routine with no flicker...
routine will exit at approx 14 ... -
How to Poke a real Spectrum....Hi everyone. Can anyone remind me how to use POKES? (using a real Spectrum, not via the tipshop on an emulator). I've searched around and I can't f…
... tried to press BREAK to interrupt the loading.
Ultimate ... load in a machine code routine to do the rest of ... be the machine code loading routine. -
Opus DiscoveryWould anyone have any materials about programming the Opus Discovery disk? I know it overrides ROM and uses microdrive commands, but I am more into b…
... somewhere to RAM and raise interrupt when done?)
4. If ... invisible delay in the main routine.
[/quote]
So ... -
New game: SolarGun 1.0[img]https://dl.dropboxusercontent.com/u/75238938/solargun4.png[/img] [img]https://dl.dropboxusercontent.com/u/75238938/solargun5.gif[/img] (that g…
... /> im 2 ; interrupt mode 2, which should ... interrupts inside the interrupt handler routine. So a simple ... Section "Interrupt Response"
sub-section "Interrupt Enable/Disable"< ... will lockup forever, since interrupt handler never enabled interrupts ... -
New game: SETO TAISHO VS YOKAIHello Spec-chums! At last, my new game is available for download: [img]http://www.alessandrogrussu.it/zx/Seto-art.jpg[/img] [b]Features:[/b]…
In kempston joystick routine is small bug. Game use ... software read joystick port after interrupt (border time) then on D5 ... A,(C) or replace joystick routine with this version:
XOR ... -
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…
... the actual issue here is interrupt skipping. The sprite routines used ... end, if a sprite routine happens to be running during ... around it by restricting sprite routine execution to a specific ... routines so that they're interrupt-friendly while doing more ... -
What is it?One of the ideas for new features on WoS that seems to be popular is to maintain a repository of code/music/graphics/other for people to use in their…
... can be used, like sound routine, video routine, keyboard scan, joystick detection ... sound, bleeper sound Fx, bleeper interrupt music, AY sound Fx, AY ... interrupt music.
But input ... -
The best emulator for the ZX81?Hi everyone, could you please recommend me an emulator for the ZX81 which is good and easy? Thanks!
... 's something related to the interrupt routines, but I'm not ... months I changed a timing routine in the ZX81 and suddenly ... -
Pietro Bros [DEMO]Hi People. I wanna share with you a game that I'm working on, since a month or so... [img]http://i.imgur.com/kOoPGzU.png[/img] [url="https:…
... calling a certain routine X once per
interrupt. In NIRVANA+, there ... invoke your AY player routine at every
interrupt (as long as ... -
Reading sequential key pressesI am thinking about writing a quick game and have an idea that requires me to read alternate key presses. I’m thinking along the lines of Daley Thomp…
... quote="Alcoholics Anonymous;868189"]Every interrupt is probably not fast enough ... frequently than in the interrupt leads to much better ... polling rather than an interrupt when reading the keyboard ... 'overlooked' by the input routine, it would only result in ... -
Basic Screen Shadow QuestionHello, I've been porting a game to the Spectrum from another platform. So far so good and I have per pixel screen scrolling working really nicely …
... through to the bank switching routine for the third time, OUTputting ... -
Basic Screen Shadow QuestionHello, I've been porting a game to the Spectrum from another platform. So far so good and I have per pixel screen scrolling working really nicely …
... through to the bank switching routine for the third time, OUTputting ... . Or the fact that the interrupt handler of the 128 ROM ... -
Some Graphic Coding & Audio help.Hello my fellow WoS'ers I am in the process of writing some code for graphical purposes - I have Z88DK raring to go but I do not know how to take…
... an asm routine that needs to be run on each interrupt which ... -
Was there ever a virus or malware for any 8 bit system?Was there ever a virus or malware for any 8 bit system? You couldn't have one on a cassette only system, unless you were stupid enough to fall for th…
... routine (the virus) in there and have it called at every interrupt ... -
Line DemoI was looking in the source code of another game (that Akalabeth game), with lots of line drawings. The difference was that they don't use the PL…
... low as possible for your routine, but I also noticed that ... also synchronise with the 50Hz interrupt. -
Why doesnt this work???Simple piece of code wont do as it should, just want to fill the top 22 lines of screen with an attribute value (150) but it wont have any of it. Som…
... /> And if an interrupt occurs while that routine is occurring, numbers will ... -
Why doesnt this work???Simple piece of code wont do as it should, just want to fill the top 22 lines of screen with an attribute value (150) but it wont have any of it. Som…
... /> And if an interrupt occurs while that routine is occurring, numbers will ... .[/quote]
An interrupt pushing to screen RAM should ... at the end of the interrupt anyway.
Just don ... 't allow an interrupt to write below the display ... -
ZX Spectrum CartridgesI have been thinking of "cloning" ZX Cartridges for a while (case, board and silicon skirt), to be able to make new releases or replace damaged cartr…
... in ULA) + z80 registers and Interrupt mode & Status (Stored in ... per game (your ram copy routine+stack size) + 27 bytes per ... game).
Your copy routine will dump all three slots ... -
how to fix instructions on screenI have a problem with my sequencer. I want the top half of the screen to stay fixed but allow the note values to print without pushing the instructio…
... '? Something the guy did with interrupt codes to squeeze more out ... ]
however, i think the routine at $1601 will destroy the ... -
New Game: SNAKE ESCAPE[b]SNAKE ESCAPE[/b] is a brand new game for the ZX-Spectrum! [img]http://i68.tinypic.com/9sqdj8.png[/img] [img]http://i65.tinypic.com/65odna.png[…
... so complex, that it broke routine timings. I described this issue ... play (thus missing the multicolor interrupt). There's nothing I could ... -
CASTLE CAPERSThe Dream Fairies have been kidnapped by the evil mouse king and his horrible accolites Use your magic to make blocks or holes and go up and down t…
... game test joystick port after interrupt (in this time is data ...
Output of this routine:
A=0 = kempston joystick ... -
****ing Awesome Spectrum Engine (FASE)This is a new engine (sprites, tiles, map) for all ZX Spectrum machines. The engine set ups a runtime enviroment that leave between 24K and 30K byt…
... effectively acts like a user interrupt service routine run at the end ... -
****ing Awesome Spectrum Engine (FASE)This is a new engine (sprites, tiles, map) for all ZX Spectrum machines. The engine set ups a runtime enviroment that leave between 24K and 30K byt…
... effectively acts like a user interrupt service routine run at the end ... task easily. He writes the routine and put the address every ... works on 48K mode, the routine will called only one time ... the engine is 128K the routine will called twice (for main ... -
In-game AY music and sound effectsI'm currently working on various aspects of a Spectrum game and thinking now about the sound side of things. I know you can use a utility like Vortex…
... ' onto the next interrupt, or make your sfx routine itself act like ... spare time until the next interrupt
Personally, I find ... -
In-game AY music and sound effectsI'm currently working on various aspects of a Spectrum game and thinking now about the sound side of things. I know you can use a utility like Vortex…
... beeper via an out(254) routine (taking care not to hog ... frame, exit the sound effect routine and start the processing for ... ISR to indicate when the interrupt occurs. I've always incremented ... register to indicate when an interrupt occurred. I'm sure there ... -
In-game AY music and sound effectsI'm currently working on various aspects of a Spectrum game and thinking now about the sound side of things. I know you can use a utility like Vortex…
[quote="jonathan;901736"]Once the interrupt occurs to signal the start of the next frame, exit the sound effect routine[/quote]
Can you fiddle with the stack so that reti goes back to a different place than it came from? -
128K memory bank selection to avoid contention issuesI'm currently developing a game and I'm trying to get my head around the memory contention issues of the various 128K/+2/+2A/+3 spectrum models in or…
... . I could get the IM2 routine to switch in the bank ... value $FD so that the interrupt goes to my jump instruction ... -
128K memory bank selection to avoid contention issuesI'm currently developing a game and I'm trying to get my head around the memory contention issues of the various 128K/+2/+2A/+3 spectrum models in or…
... banks, I write a paging routine with @impomatic which identifies the ... it uses the ROM's interrupt service routine to test the contention ... with a small custom IM2 routine, or just see if it ...
