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A z88dk + sp1 demo (with source)Since nowadays people are still wondering about how difficult it is to make something in z88dk, I thought I just put a very simple demo to show how e…
... slower because there is a HALT instruction after each border effect. If ... -
BorderTron 3000A little bit of speccy-related fun for a Friday afternoon... I've knocked together a program for Windows which I've called Bordertron 3000 (a suitabl…
... of time to complete. A HALT instruction (assuming that's how you ... -
BorderTron 3000A little bit of speccy-related fun for a Friday afternoon... I've knocked together a program for Windows which I've called Bordertron 3000 (a suitabl…
[QUOTE=gasman;619256] A HALT instruction (assuming that's how you' ... be normalized by a contended instruction used in a contended cycle ... 'm using LD a,(22558 )instruction at 14335(+-3) to land ... -
Dimming the screen...Hi Folks, I was hoping someone on here could help me with a wee machine code routine. I have written the following example in BASIC: [CODE]100 REM…
... b,8
FadeLoop halt
halt ;each halt instruction slows down a bit ... -
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 ... tried:
MAINLOOP
HALT
DELETE THINGS
DRAW ... sound effects can overshoot the HALT quite a lot if you ... -
"Chronos": how fast should it really be?I was reading [URL="http://timfollin.pwp.blueyonder.co.uk/Archive.htm"]Tim Follin's webpage[/URL] the other day and came across a curious remark abou…
... was to simply insert a halt instruction somewhere in the game cycle ... -
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=Korinel;708913]They seem to get stuck on the halt instruction.[/quote]
Which would imply something about IFF1/2 and/or IM. Do your problem snapshots work on Fuse? -
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…
... a loop that includes a HALT. If it's loaded on ... will hang on encountering the HALT instruction. -
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…
... a loop that includes a HALT. If it's loaded on ... will hang on encountering the HALT instruction.[/QUOTE]
On ZXMAK2 ... -
30-column 8x2 multicolor (even in 48K)I don't recall any 8x2 multicolor routine for 30 columns that would work on all Spectrum models (including the Spectrum 48K), so I decided to write i…
... have to rely on a HALT instruction waiting for an IM1 interrupt ... -
30-column 8x2 multicolor (even in 48K)I don't recall any 8x2 multicolor routine for 30 columns that would work on all Spectrum models (including the Spectrum 48K), so I decided to write i…
... have to rely on a HALT instruction waiting for an IM1 interrupt ... -
Asm routine for AY playback?Hi, is possible to create and "name" an asm routine for playing some ay data? If yes, how? Example: Ok , I've finished a sound tracker song, now I n…
... of a second (using the HALT instruction to regulate timing), you can ... -
Asm routine for AY playback?Hi, is possible to create and "name" an asm routine for playing some ay data? If yes, how? Example: Ok , I've finished a sound tracker song, now I n…
... of a second (using the HALT instruction to regulate timing), you can ... -
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)…
... so I can use the Halt in the main loop. Should ... be executed just after your halt instruction in your main loop, i ... a counter just after the halt in your main loop instead ... -
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…
... ]5.4 HALT instruction[/FONT]
[FONT=sans-serif]The HALT instruction halts the ... [/URL]
3.5) HALT instruction [4] The HALT instruction halts the Z80; it ... =sans-serif]Whenever a software halt instruction is recognized by the CPU ... -
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…
... here that memory contention from HALT isn't something people would ... somewhat crazy to place the instruction at 0x3fff and rely on ... occurs to me: if a HALT is interrupted by an NMI ... incremented to point past the HALT instruction? You may perhaps think not ... -
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…
... occurs to me: if a HALT is interrupted by an NMI ... incremented to point past the HALT instruction?[/quote]
I'm 95 ... so it returned to the instruction after HALT.
I'm ... -
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…
... pointing at an EI instruction, if interrupts were ... end of the instruction after the EI instruction." Setting IFF1 ... goes on during a halt instruction, only what effectively happens ... instruction execution) after fetching & executing HALT so that HALT ... -
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…
About the behaviour of HALT, the discussion in this post ... the computer is executing a HALT instruction, with interrupts disabled.
[url ... the address of the next instruction past HALT. What do yout think? -
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…
... the computer is executing a HALT instruction, with interrupts disabled.
[url ... the address of the next instruction past HALT. What do yout think ... , we'd execute one more instruction, and then reset. So I ... bothering with the 'one more instruction' thing). -
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…
... this: "An EI instruction sets both IFF1 and ... end of the instruction after the EI instruction." Setting IFF1 ... what goes on during a halt instruction, only what effectively happens ... during instruction execution) after fetching & executing HALT so that HALT ... -
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…
... has to point after the HALT, as otherwise when the ... will have skipped past the HALT instruction when if we do a ... implicit NOP executed after a HALT until the interrupt is acknowledged ... return [I]to[/I] the HALT instruction, then an interrupt handler that ... -
Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
... cause the cpu to Halt ?[/QUOTE]
A HALT instruction. Now there are ... three HALT instructions in the ROM ... to any of the three HALT instructions, as the ROM program ... ;765050]No, if pin 18 (/HALT) is low, the CPU has ... -
Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
... =1024MAK;765107]A HALT instruction. Now there are three HALT instructions in the ... to any of the three HALT instructions, as the ROM program ... -
Fire n' Ice, is it possible to convert it tp tap. or tzx?Wathching a little bit the video from this game in rzxarchive, and it is really outstanding. So I was wondering if its possible to make the trd file …
... ) POKE 33060,0 - remove one HALT instruction = AY music play slow, but ... -
Snowfall effectHow do you go about creating a snowfall effect like the one in Yeti? Now don't laugh, I'm currently printing 32 UDG's of dots OVER the top of my gam…
... ? Is it timed to a HALT instruction?
-how are you storing ... works
;
mainloop
halt
call snowfall
ld ... -
HALT: Why always 4ts?Instruction breakdown of halt is like that: PC 4ts. That means it fetches instruction byte from ram which tooks 4 ts and then does nothing and read…
... the case, then the NOP instruction needs to complete before the ... previous value so the same HALT instruction is read and executed again ... -
HALT: Why always 4ts?Instruction breakdown of halt is like that: PC 4ts. That means it fetches instruction byte from ram which tooks 4 ts and then does nothing and read…
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After executing the HALT instruction the Z80 keeps doing an ... opcode fetch of the next instruction until there is a ... at the end of the HALT instruction then it stays at address ... ), or the next one (instruction after the HALT)[/QUOTE]
...
