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Floating bus on 128K models[b]Background:[/b] i need run code with interrupt enabled but i need use stack instruction to maximize performance in copy/shift/mirror routines. dur…
... around stack abuse. Within the interrupt routine I use the fast one ... what would have been the interrupt routine directly. -
Floating bus on 128K models[b]Background:[/b] i need run code with interrupt enabled but i need use stack instruction to maximize performance in copy/shift/mirror routines. dur…
... what would have been the interrupt routine directly.[/QUOTE]
You ... . Even the shortest possible IM2 routine - a single RET or RETI ... -
Help needed with simple MCode routineI'm trying to code a routine to clear the screen and I can't figure out why it's not working: ld hl,16384 ld bc, 6144 loop:ld (hl),0 inc hl dec bc l…
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Have you got an Interrupt routine working?
What happens ... -
Oscilloscope Speccy ProgramHi all, I remember very well in the old days when my Speccy was my single computer (around 1992) that I have had an oscilloscope software. This uses…
... the little m/code sub-routine, I expected the value in ... load more times and the routine returns an out of range ... have no idea. The only interrupt routine running will be the keyboard ... other code in the sub-routine which alters the B register ... -
New game coming soon: PhaetonI have thought that I'll announce it now to build some anticipation ;) I'm almost ready with my new Spectrum game called [B]Phaeton[/B]. It is a g…
[QUOTE=Ralf;501215]I could do a Spectrum model detection at the start of the program and adjust my code appropriately, although I have no idea at the moment how to detect Pentagon[/QUOTE]
Best way for detect Pentagon is test CPU speec (number ... -
Gigascreen - programming guideDoes anyone know of a programming guide for the 128K gigascreen screen mode, specifically a persistence colours table, some code (pref. C level or BA…
... ]You really need an interrupt-driven machine code routine to alternate the ... frame (via HALT, or an interrupt routine, or PAUSE 1 at a ... -
Sprites masterclassHi All, You guys are probably tired of explaining sprites but I'd like to clarify a few things if possible. I've sorted the vertical aspect of scro…
... adjust to the main sprite routine - but if anyone wants them ... the sprites, waits for the interrupt, runs bank 2, waits again ... running it under an IM2 interrupt routine, and provided you synch up ... -
Is this the infamous Dead CockroachCan anyone help me. I have an issue two spectrum that I want to list on ebay, but I want to know if this has the dead cockroach ULA fix. I would have…
... reads the keyboard only in interrupt routine, when no display data are ... -
RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…
... doing the printing in an interrupt routine, one character at a time ... one row then, a seperate routine used to scroll the paper ... -
RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…
... doing the printing in an interrupt routine, one character at a time ... row then, a seperate routine used to scroll the paper ... work fine from within an interrupt routine.
[/quote]A ... ]
Unfortunately the routine as written doesn't support ... -
yeah - unix for zx spectrumI started a new hobby project. An operating system for ZX Spectrum. A unix clone. Talked to my friend about it and he asked me what if after I'm done…
An alternative approach to disabling interrupts is to use IM2 mode and when you don't want to the interrupt routine to run, point the routine at a RET instead. You can use inline DIs for timing critical stuff. -
yeah - unix for zx spectrumI started a new hobby project. An operating system for ZX Spectrum. A unix clone. Talked to my friend about it and he asked me what if after I'm done…
... why do you insisting on interrupt-based multitasking. see, any real ... be some 'watchcat' in the interrupt routine, so you can forcibly kill ... -
Zynaps: is it handcoded?sorry if this question was already answered. but i did some inspection of Zynaps code and it seems to me that it's screen drawing (and maybe other pa…
... here and there (even from interrupt routine, afair), something like spagetty or ... -
So what is the best Spectrum?I've had a search and even though i can remember a similar thread somewhere I'll twist it a bit. Whats the best "unmodified" Spectrum? (modification…
... test because it uses an interrupt routine that takes up more T ... keypad reading code in the interrupt routine, whereas the the +3 is ... disk access code in the interrupt routine. So if you put the ... -
Random numbers...Hi Folks, I am not an expert when it comes to random numbers. If I have the RANDOMIZE statement the beginning of a program and then proceed to gene…
... . This assumes the basic rom interrupt routine is running becasue it is ... -
Spectrum - Show in London area, April 2012Hello Folks, we have been already discussing in another thread. Here I simply want check the interest.So the question is easy: If we will organize a …
... /off messages in an IM2 routine to avoid buggering up the ... while drawing animations in an interrupt routine which you can have the ... -
GUI/OS for the Spectrum?Hi, Is anybody working on a WIMP/GUI system for the Spec? Is there anything current out there? [url]http://snakeoillabs.com/wordpress/2005/10/30/8…
... X or Y direction, an interrupt is generated (there are two ... for X and Y). The interrupt routine must read the relevant PIO ... -
Question about DivIDEHi guys, Tell me this... (please) DivIDE features an "auto-mapping feature transparently maps shadow ROM at important entry points". Depending on …
... /> #0008 - error syntax
#0038 - IM1 interrupt
#0066 - NMI
#04C6 ... -
Why doesn't my routine work?I have a "level" defined by 504 bytes (28 squares across x 18 squares down) I'm trying to write a routine that will take an X,Y coordinate in pixels…
... /> ; --------------------------------
; THE 'MASKABLE INTERRUPT' ROUTINE
; --------------------------------
; This routine increments the Spectrum's ... the USA ).
; Both this routine and the called KEYBOARD subroutine ... -
New WIP underway - 'Dingo'.Hi, Prepare for a long post. Perhaps I can even challenge ewgf here. :razz: Anyway, I've been meaning to get into Z80 programming and making a game…
... a slightly more fancy sprite routine, but I'll do that ... for a pre-shifted XOR routine. Just set up the registers ... . Assuming you're using an interrupt routine which increments the FRAMES system ...
