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How to safely maximise available memoryHi All, I'm toying with an idea that will require I have as much memory available as possible. I'm a little embarrassed I have to ask this tbh. As…
... PUSHes the current execution address (program counter) onto the stack, for the ... -
Snapshots (SNA) -> Keeping the loading screen?I've seen quite a few Snapshots (SNA) that kind of hesitate on the loading screen prior to entering the game menu... I quite like this. Anyone know …
... .htm[/url]
"As the program counter is pushed onto the stack ... RETN instruction can restart the program, 2 bytes of memory are ... -
Simple explanation of interrupts (in the context of Z80/Speccy)I wondered if somebody on here could explain in simple terms how interrupts work on the Speccy and where interrupts are source from. Are they a natur…
... push the registers and the program counter on the stack?
Does ... -
Simple explanation of interrupts (in the context of Z80/Speccy)I wondered if somebody on here could explain in simple terms how interrupts work on the Speccy and where interrupts are source from. Are they a natur…
... push the registers and the program counter on the stack?[/quote]
Simple explanation of interrupts (in the context of Z80/Speccy)I wondered if somebody on here could explain in simple terms how interrupts work on the Speccy and where interrupts are source from. Are they a natur…
Spectrum30 Show in Cambridge, 08th-09th September 2012Hello Spectrum-fans, after many months of preparation we now proudly present what will be the biggest Spectrum venue of the last 20 years. We manage…
... normally relies on intercepting the program counter?Play command on divideHi, i thought I'd have a quick go on divide seeing as i had an afternoon spare.However,i can't seem to get the 'play' command on the screen?. It see…
... 're unlucky enough for the program counter to hit one of them ... using the following machine code program:
[code]di
ld ...BBC Micro from 2012 (almost)I just replaced the Raspberry Pi (the original one I had was stolen...grrr) with one of the new v2 boards. RiscOS has just been made available for th…
... Archimedes had a 26 bit program counter with status bits in the ... has used a 32 bit program counter - so programs written for ARM2 ...Code execution logging/profilingAs revealed in [url="http://www.worldofspectrum.org/forums/showthread.php?t=41666"]this thread[/url], I'm adding support for reading code execution l…
... file you mention?)... hook the Program Counter each time you execute an ...Code execution logging/profilingAs revealed in [url="http://www.worldofspectrum.org/forums/showthread.php?t=41666"]this thread[/url], I'm adding support for reading code execution l…
... file you mention?)... hook the Program Counter each time you execute an ...Video generation using a CPUWe know it is possible to generate a video signal using a CPU, and this technique was often used on low-end computers in the early 1980's (for exampl…
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The address in the program counter now points to the first ...The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... when on a game or program running It frozes or even ... get a trace of the program counter. ROMCS would also be useful ...Some thoughs about fast scrolling on 128 modelPlease, consider this article as technically interesting concept not a proven algorithm. ONE The fastest scrollers use long sequence of PUSH inst…
... code. At this time, if Program Counter (that indicates the instruction location ...Is there an SNA halt bug?Hello all, I noticed that some SNAs don't work on my emulator but they do work in almost everyone else's, SPUD fails with them too which is a tad sp…
[QUOTE=balford;709150]Ensure that you support IFF1 and IFF2 values correctly in your Z80 emulation, then the other important bits are as follows:
(Code in C# so bitwise comparisons a bit convoluted to keep the compiler happy)
...Is there an SNA halt bug?Hello all, I noticed that some SNAs don't work on my emulator but they do work in almost everyone else's, SPUD fails with them too which is a tad sp…
... RETN:
"As the program counter is pushed onto the stack ... RETN instruction can restart the program"
If you use ...Is there an emulator that can "autosnapshot" after loading a tape?The reason i'm asking is that my everyday speccy is a grey +2 with a DivIDE 2k11. Some TAP files simply won't work because of rom checks and other in…
... will be different for every program.[/QUOTE]
For games ... breakpoint is hit, rewind the program counter to just before the LDIR ...Can a guy that traveled on the short bus learn machine code...Hmmm So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing w…
... to make the Hex input program a bit more flash - to ... before I was running the program... Imagine all day I was ... on anything execpt that the program counter is able to inc on ...US Timex-Sinclair 2068 in EuropeWhilst in the States, I convinced a colleague to bid on a Timex-Sinclair 2068. We won the auction with a price much better than in Europe. Next time …
... now present, hopefully causing the program counter to pass through address 0 ...Clashbasher a new interface to reduce colour clashI've been working on this for a while now. [IMG]http://markamy.uwclub.net/cauldron.JPG[/IMG] Basicly its an add on for a 48k spectrum, which reinte…
... react to where the z80 program counter is pointing we should see ...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…
... it.
I downloaded z88dk again and it doesnt need ... will need in the average z88dk program?
So I can ... place my program back from 32768,
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…
... will need in the average z88dk program?
[/quote]
That ... size is while running your program and (3) looking at ... famously uses 0xdeadbeef), running the program as per usual, and then ... /> So I can place my program back from 32768,
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…
... will need in the average z88dk program?[/QUOTE]
In my games ... />
The point of your program is not making lots of ...Seeing the code/In emulatorHello, Here is my Noob question. Is it possible to see the code for these games in an emulator? To be able to study the code? I am using the Sp…
... dammit! You don't track Program Counter while working with basic :) For ...Clashbasher a new interface to reduce colour clashI've been working on this for a while now. [IMG]http://markamy.uwclub.net/cauldron.JPG[/IMG] Basicly its an add on for a 48k spectrum, which reinte…
... are triggered by the spectrum program counter reaching the equivalent address.
program counter reaches 9153 hex. Acording to ...FUSE serial communication sample anyone?Hi, in [URL="http://manpages.ubuntu.com/manpages/precise/man1/fuse.1.html"]FUSE man pages[/URL] one finds switches for serial comms. By using --inte…
ESXDOS 0.8.5 and .Z80 on +2B or +3Last week I received some .Z80 snapshot files from a DivMMC EnJOY! user to test. These files didn't work on his ZX Spectrum +2B. [URL="http://benophe…
... snapshot of the otherwise compatible program is made when it it ... />
I checked the PC (program counter) in the Z80 files Ben ...Programming with an 8-year-oldI have promised to write a game with my 8-year-old son and was wondering what languages or tools to use. Does anyone have any suggestions? My own c…
... laid out the program, used a pointer (a program counter if you like ... ..) to step through the program and moved ... going to write a big program with this (a set of ...DJNZ displacementHi I had a question about DJNZ operation. Just running through this code in MMCOYZXS by Toni Baker page's 87-88 [QUOTE]21A440 LD HL,40A4 11083F …
After reading the DJNZ instruction, the program counter is already pointing to the next instruction (the RET) - so you have to count forwards or backwards from there.48k memory dump to 128k???Having problems getting a 48k snapshot to load into 128k mode using ZX Spin. Tried saving 48k memory as a binary file and loading it back in 128k mo…
... , where in memory is the program counter? If the PC isZX-Modules app reportZX-Modules app report If You are interested, I want to report about the state and progress about my ZX-Modules programs. I would like to report at l…
... see high potential in that program, because it's very different ... sense in the following example program. It's just thought for ... used for evaluating the current program counter. That way, the total size ...
