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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…
... to get stuck on the halt instruction. I can't find any ... with regard to SNA and halt, does anyone have the details ... -
Address bus contents (i.e. PC) during execution of HALTI'm wondering if anyone can tell me what's placed on the address bus during execution of HALT, beyond the initial M1 cycle. The Z80 user manual state…
... of the address of the HALT instruction each time, what need would ... contains the following code for HALT:
[CODE] case ... the opcode fetch after a HALT could actually trigger paging ... of addresses well before the HALT operation finishes. While I ... -
Spin problems/issuesI am running Spin 0.666 and have noticed a few issues (some are bugs, some might be just me). I am using Vista sp1 (yeah I know!), and I've seen Dunn…
... will now freeze at the HALT instruction because no interrupts are occurring ... debugger is stuck on the HALT instruction. Press "step over". It' ... s still stuck on the HALT instruction. The only way I ... get past the HALT instruction is to remove the ... -
Emulator to create log files?Could someone please recommend a Spectrum 128K emulator that can dump the following data to an external text file, while emulating at normal speed? …
... routine and at a single HALT instruction, whose addresses I will provide ... -
Using RST 16 and udg flickerHi there! I'm using UDGs and RST 16 to make a simple canyon bomber game. I've got the game mechanics working ( finally ) but now I'd like to make …
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I have used a halt instruction before my draw operation, but ... -
Hacker Chris' Christmas Demo doesn't work[url=http://www.worldofspectrum.org/infoseekid.cgi?id=0007314]Christmas Demo[/url] .z80 file from WOS doesn't work for me. I tested in Fuse and SpecE…
... program is stuck in a HALT instruction with maskable interrupt disabled.
Game loopJust working on my first ever Spectrum game, and am struggling to work out what the game-loop should look like. I've got interrupts enabled (mode 2)…
... (pseudo code):
loop: halt ; wait for interrupt to occur ... I was thinking about the halt instruction I then thought it might ... :
loop: update_stuff
halt
clear_sprites (from old position ...Slow/fast games - change speedSome ZX games are too slow or too fast. Problem with speed is aslo in russian ZX games or thanks to different memory layout on zx128 and +2a models. …
... games if you remove some HALT instructions. For example in russian ... . One POKE 43315,0 replace HALT instruction with NOP and game run ... .
Not always is HALT instruction use for screen synchronisation, but ...Double Buffering Artefacts on Real HardwareI have a project that I've played around with for a while and always tested using emulators, either ZX Spin or Spectaculator. It is a 128k game th…
... switch the screen after a HALT instruction.
Of course it ...Key repeat weirdness with EI & IYI finally (after 35 years!) decided to write something a) for 48k speccy b) in z80 assembler. It's been over 20 years since I've written anything in …
... because of that I use HALT instruction to wait for vertical retrace ... . And HALT does not seem to work ... wait for vertical retrace without HALT & EI?
How to write a simple C+asm horizontal scrolling game (Tutorial, z88dk)[b]How to write a simple C/asm horizontal scrolling game[/b] [b]Note:[/b] This tutorial has multiple parts... I am still writing but this first pa…
... /> scroll_left();
#asm
halt
#endasm
}
HALT instruction, which does nothing much other ...Microdrive woesHi there! Just managed to pick up a 2nd hand Microdrive and interface one... Came with an introductory program which doesn't seem to load. Since its…
... PC is stuck at the HALT instruction at #1303 in the main ...Game loop design?Having some thoughts on how to design the game loop and could do with some hints and tips from folks who have done it before! It's all about how to …
... 'proper' code as CALL draw_screen \ HALT \ JR halt_inst \.
The ... proper program
jump to HALT instruction
reenter IM2 vector
Sprites flickeringI am trying to write a Spectrum game in machine code. I am still a beginner in programming, however I did much progress recently, i believe. Now I am…
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If you use a HALT instruction then the CPU will wait ...FrameSyncIt was many many years ago since i programmed assembly on the spectrum but I just picked it up again for fun. Now this is one thing I can't remember…
... framesync by simply issuing a halt instruction at the end of the ...Pocket Clive - 2 QuestionsHello, I've just started using Pocket Clive on my iPaq pocket PC, excellent emulator BTW. 1. I have just wrote a small BASIC program to randomly pi…
... , we can safely insert a halt instruction at a convenient place (e ... further, by possibly relocating the 'halt' instruction.
However, it may not ... a perfect patch since the 'halt fix' method undoubtedly uses up ...Pocket Clive - 2 QuestionsHello, I've just started using Pocket Clive on my iPaq pocket PC, excellent emulator BTW. 1. I have just wrote a small BASIC program to randomly pi…
... bus probe", and install the HALT instruction at a convenient place.
Sprite adviceHello. So, I'm slowly getting to grips with Z80 assembly - currently equal parts frustration and enjoyment. Now looking for some advice to help shift…
... you get flicking, put a halt instruction just before you start the ...R Register, Contended RAM and ClonesHi. I've had a quick look at the CSS FAQ but didn't spot quite what I'm looking for (also the CSS FAQ doesn't have much detail of the clones - there …
If you think of a HALT instruction as being like a NOP that doesn't increment the PC, then it might make more sense.My emulator doesn't take "commands"Hi This is probably a question that is very hard to answer, but perhaps some of you have/had the same problem. In my own emulator (that I have built)…
Solved it!!! *wohoo*
I had failed to implement the (very hard to implement *not*) halt instruction .
Made the emulator go into a halt loop and executing only interupt sequences.
Thanks guys =)
/JimmyComments for small "sprite" routine wantedI have just written my first machine code program and I am quite happy (and proud) to get it working! :smile: As a child I never learned anything e…
... this?
And the HALT instruction, for how long does it ...Comments for small "sprite" routine wantedI have just written my first machine code program and I am quite happy (and proud) to get it working! :smile: As a child I never learned anything e…
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[quote]
And the HALT instruction, for how long does it ...Arkanoid and +2A, problems??Is there any kind of incompatibility with Arkanoid in a +2A? I load the game but when it's time to play, the stick doesn't move and nothing happens, …
... can be replaced with a 'halt' instruction to sync the screen).Dangerous Z80 Assembly CommandHave been reading Toni Bakers' "Mastering MC On Ya Speccy" book and came across the list of Z80 commands in the dictionary section. Page 102 "[b]IM…
... in the foreground, using the HALT instruction, like this month's tape ...In-game music takes CPU time?If a 128k wants to have music played in-game using the AY sound chip, does that consume a lot of CPU time? What I am after is if the reason why man…
... space just by putting a HALT instruction after you've drawn the ...In-game music takes CPU time?If a 128k wants to have music played in-game using the AY sound chip, does that consume a lot of CPU time? What I am after is if the reason why man…
... of my games using a HALT at the end of each ... does an immediate RET(I) instruction and then get on with ... speed is controlled by a HALT instruction is academic.Program Counter question - please readSorry if this is in the wrong forum, but please read it through anyway - see on the FUSE PSP emulator I asked the author if he'd add an option to pri…
... unless it has hit a HALT instruction (and it will only stay ... on that HALT forever if interrupts are disabled ...Program Counter question - please readSorry if this is in the wrong forum, but please read it through anyway - see on the FUSE PSP emulator I asked the author if he'd add an option to pri…
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[code]
main_loop:
HALT ; (wait for the next interrupt ... be comfortably waiting at the HALT instruction again, and so that's ... the instruction that your PC display will ...Program Counter question - please readSorry if this is in the wrong forum, but please read it through anyway - see on the FUSE PSP emulator I asked the author if he'd add an option to pri…
... is when it hits a HALT instruction (and it'll only stop ... is done once per M1 (instruction fetch) cycle).
Crashing ... - for example, they have illegal instruction traps, and the MMU can ...!!! Trdos Emulation On Zx !!![B]This is software emulator of TRDOS(betadisk). Yet is writed only for interface MB02+, but will ported to more other IDE interfaces with external r…
... is paged, one LED indicating HALT instruction and another LED for 2nd ...
