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Memory concerns with z88dkI've retaken my old spectrum project and sadly I've reached a dead end very fast. I'll try to explain my worst problem in a few lines. I'm not a vet…
... /> things work. What can I do to avoid or minimize memory ... 257 im2 table entries. We do this because, on the spectrum ... a random device id during int acknowledge. Because all bytes in ... my_isr()
#asm
ei
#endasm
[/code]
A question about M1 cyclesI'm writing an interrupt routine that, after the usual register pushes, will jump to a location of my choice with a [b]JP (IY)[/b] instruction. If I…
... 'remember' internally that #IORQ signal was activated, just not [I ... isn't bankswitched, and do bankswitching in your main ... and only [B]then[/B] do the OUT instruction to actually ... don't need DI/EI sequence at all..!! If ... cycles wasted on DI/EI instructions).A question about M1 cyclesI'm writing an interrupt routine that, after the usual register pushes, will jump to a location of my choice with a [b]JP (IY)[/b] instruction. If I…
... the shared memory copy, then do the actual work to make ... ;454160]If interrupts occured after EI the isr could get called ... .[/QUOTE]
The interrupt signal is an external input, not ...Assembly Programming for IDIOTSOk are there any websites guides for what opcodes do in a z80 or books... but for really really thick people like me :-) Something along the lines …
... websites guides for what opcodes do in a z80
...
what does HLT do (HALT = Halts the processor )
EI' and 'RETI'.
3) The interrupt signal can be ... the interrupt. Once acknowleged, the signal cannot be detected until next ...Why doesn't my loop work?Can anyone help me understand why my loop doesn't work? Is it to do with how DEC HL affects the flags? [code] ; Read 32k bytes from port 191 as fa…
... 's possible to move the signal you have on bit 4 ... to modify above code to do that...
Almost forgot ... entering the trigger loop (and EI before return to BASIC).Z80 Processor Interupt helpHi everyone, Currently designing a Z80 computer and i need a little help with these interupts. If i have an I/O device that sends a pulse to the int…
... what exactly does the Z80 do? Does it store the ... assume you're asking about INT interrupts, not NMI interrupts ... If the Z80 is in EI state (interrupts enabled), Z80 ... , it can deactivate the INT line. Some I/O ... INTA cycle to deactivate the INT line. Others, as the ...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…
... to idle. between bits you do timing based on timing of ... if you're within DI...EI code. but what if your ... DCE). client A controls RTS signal and client B controls CTS ... ) and RTRB. when RTRA signal is 1 then client A ... receive. and when RTRB signal is 1 client B is ...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…
... that the right thing to do?
I'm trying ... /> void handle_interrupt()
{
unsigned int address=(IM==2 ? (256*I ...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…
... routine enabled interrupts directly after EI, then another, higher priority ... interrupt within interrupt". If we do it in every interrupt handler ... fact a legitimate thing to do and is a likely ... timed interrupts (a clock, a signal processing gadget, etc). It is ...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…
... confused now. Wasn't EI;RETI only supposed to be ... 's fine to use EI;RET if I'm ... s not dangerous to use EI;RET, it's just ... ff all the time during int ack (not true on ... bytes. People can use EI;RET and assume the machine ... they are told not to do that. That's when ...Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... time: 59736
EI is prefix: yes
INT time: 32[/CODE ... /2012/05/temporizacao-de-video-do-tk90x-parte-6.html"]here ...Skooldaze TooDear WoSsers, Thanks to Skoolkid's disassembly I'm attempting to write a new "improved" version called [B]Skooldaze Too[/B]. As part of the improvem…
...
8 - Now don't do it again
- ?l? ... valmiiksi... Paina jotain n?pp?int? pelataksesi uudelleen.
43 - Do you want to put in ... teenagehood references.
- Ei en?? tillilihaa
- Keskuskeitti? haisee ...BIFROST* ENGINE 1.2 released!Another improved version of the BIFROST* ENGINE is now available! Download it here: [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0027405[/u…
... take a look at this. Do you know where I can ...
from begin of INT: 3584t + 14336t + 43008t + 10752t = ... tacts
Signal INT forms wrong, in this computer ... lines = 71680 tacts. Therefore, after INT comes, it is useless to ...Oscilloscope recommendationsOscilloscope, precious, shiny things, me wants it! Me wantsss it! Er, so basically... I want to get a decent enough o'scope which would let me trace…
... just fault finding and signal timing and acquisitions ... regard refers starting of signal recording, most units ... to do much more other than acknowledge a signal is ... 2Fwatch%3Fv%3D5yNDSkQBEy0&ei=Q_AxUYfnOcnM0AWA24DABw&usg= ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... main_loop
.exit:
ei
ret
;; spins ...
.exit_edge_loop:
scf ; signal BREAK not pressed
ret ... Right, some weekend chores to do before I can get back ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... Success!
.exit:
ei
ret
;; spins ... a ; clear carry flag to signal BREAK
pop bc ; ...
(Nope, nothing better to do on a Saturday evening than ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... Released into the public domain. Do as thou wilt.
ei
ret
... carry and set zero to signal BREAK
pop bc ... generalized data block can do that, and it makes ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... /> ;; Released into the public domain. Do as thou wilt.
ei
ret
;; ... carry and set zero to signal BREAK
jr .exit ; ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... ;; Released into the public domain. Do as thou wilt.
ei
ret
;; ... carry and set zero to signal BREAK
jr .exit ; ...IF EXIST?In MS-DOS scripting, there is an IF EXIST command that lets you check wether a file exists in disk or not. There are any way to check it out from BA…
... a machine code routine to do the job; +3DOS for instance ...z88dk and im2I set up a minimal IM2 mode so I can draw sprites for a laff [code] #include <string.h> #include <stdio.h> #include <im2.h> #include <stdlib.h> #in…
... //done
}
int main()
{
//set ... br />
#asm
ei
#endasm
//done
if I do this:
[code]
# ... );
bpoke(0xd1d1, 0xfb); // ei
bpoke(0xd1d2, my_isr);
Documentation for SP1 for Z88DK?(I was going to post in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=11729"]the other thread[/URL], so if a mod thinks this should go…
... in sp1/spectrum/examples all do this to create the ... />
[code]
extern unsigned int FRAMES(23672); // place C variable ... br />
pop hl
ei
reti
#endasm
do the same thing. The first ...Documentation for SP1 for Z88DK?(I was going to post in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=11729"]the other thread[/URL], so if a mod thinks this should go…
... the full screen
unsigned int mytimer;
// Table Holding ... />
pop hl
ei
reti
#endasm
#asm
ei
#endasm
while (1 ... br />
how much room do you think the stack will ...Collision Detection in SP1Hi, Does anyone have a well-documented example of using collision detection in spritelib. I've search WoS and Z88DK forums but no joy. Something wi…
... library function RIsIvalInIval8
int __CALLEE__ sp1_TestCollision(struct sp1_ss *s1 ... pixels
call RIsIvalInIval8 ; do these two intervals intersect?
#asm
ei
#endasm
while (1 ...Aspartame "is safe"In case there's anyone remaining on WoS who believes in the nonsensical "aspartame is toxic" hoax, here is a link to a reputable source which refutes…
... in the ICNIRP international guidelines do not appear to have any ... br /> [url]http://www.who.int/peh-emf/standards/en/[/url ... />
[url]http://www.who.int/docstore/peh-emf/EMFStandards/who ... />
[0] A 0.1W signal radiated omnidirectionally will result in ...
