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Sync-buzzer, interrupts and general confusionBeen wittering on about this in the Misc group, but thought it was best discussed here. Basically been trying to recreate the Sid-Sound effect from A…
... a good tutorial on using interrupts? As soon as someone mentions ... -
IM 2 interrupts and smooth scrolling - easy peasy!Okay, been fiddling around with IM 2 and have actually mastered (I think) how to use IM 2! Now I run my game Ragnar Revival in IM2 and use HALT to sy…
... 1 and enable
ei ;interrupts. Jump to 0056 in ROM ... -
InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... 3.54 MHz, so interrupts are still generated every ... interrupt routines; see the retriggered interrupts section below.
interrupts were enabled beforehand.
... 'nnnn'.
Retriggered interrupts
If you ... -
Interrupts details questionSuppose I am writing a game and I want to use interrupts to measure time, draw the screen without flicker, maybe to poll keyboard etc. What kinds of …
... and I want to use interrupts to measure time, draw the ... keyboard etc. What kinds of interrupts are there?
At ... they were talking about maskable interrupts vs NMI. Are those generated ... -
How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…
... a little confused regarding the interrupts on the Spectrum. If I ... />
I suspect that the interrupts does for example keyboard scanning ... -
InterruptsI need help emulating interrupts. My z80 core currently emulates all un-prefixed opcodes and the CB opcodes. I thought I would start on emulating co…
I need help emulating interrupts.
My z80 core ... to start - my understanding of interrupts is not great (having never ... -
Need help with interrupts againI'm fighting to understand how interrupts code handling works I'm trying to set my simple own interrupt routine, as I don't want to be dependent on …
... 'm fighting to understand how interrupts code handling works
;each interrupt automatically disables interrupts, so they must be enabled ... -
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…
... explain in simple terms how interrupts work on the Speccy ... via the ULA? Are Speccy interrupts per-frame, can you schedule ... Are there different types of interrupts that can instantly jump to ... hearing stuff about non-maskable-interrupts in the case of resetting ... -
Interrupts, 16k Spectrums and snowI'm writing something for the 16k Spectrum and I want to use interrupts. The avilable documentation doesn't seem clear enough for me to figure out ho…
... and I want to use interrupts. The avilable documentation doesn't ... can I do my own interrupts on a 16k machine? Is ... -
playing ay music using interruptsi seem to remember there is a way to play ay music using interrupts. (i.e. play music while you are typing, editing listings, running another program…
i seem to remember there is a way to play ay music using interrupts. (i.e. play music while you are typing, editing listings, running another program, etc, in the background.) what is the simplest way of doing this? -
Which Emulator has a menu option to enable Interrupts (EI) if emulated Speccy hangs after DI / HALT?Which Emulator has a menu option / debugger option to enable Interrupts (EI) if emulated Speccy hangs after DI / HALT? I tried SpecEmu and Fuse, b…
Which Emulator has a menu option / debugger option to enable Interrupts (EI) if emulated Speccy hangs after DI / HALT?
I tried SpecEmu and Fuse, but I can not find a option for doing this in their debugger. -
New discovery on Z80 interrupts.This is to announce the discovery of a new, hitherto unknown, behavior of the RETI and RETN instructions. As everyone knows, the maskable interrup…
... interrupted immediately after re-enabling interrupts if the /INT line is ... -
Yet another TR-DOS questionI have yet another TR-DOS problem. I am using "LD C, command; CALL #3D13" to call the system functions. The problem is that TR-DOS automatically enab…
... ? The fact that it enables interrupts on exit does imply that ... so. Also check the normal IM0 vector.
I would ... -
Codies help? Werewolves of LondonHi All, never one for shying away from the deep end, having only just dipped my toe in to the world of machine code I find myself trying to find out …
... IM0, the peripheral supplies an instruction to execute when it interrupts the ... at known locations.
IM0 is used by nobody as ... I register and state of interrupts (which mode, are they enabled ... -
He's back......and he's got a new trick! AY Chip here. I've been away far too long. I would like to announce 'HatStand': for no adequately explored reason, I h…
... interrupt mode with instructions IM0, IM1 and IM2. Interrupts are enabled with ... -
InterruptsI need help emulating interrupts. My z80 core currently emulates all un-prefixed opcodes and the CB opcodes. I thought I would start on emulating co…
... totally accurate :) For example, in IM0, the interrupting peripheral supplies an ... 've got several programmable timer interrupts happening during the screen draw ... z80 automatically disables further maskable interrupts. The most accurate emulators do ... -
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…
... 're asking about INT interrupts, not NMI interrupts.
If ... Z80 is in DI state (interrupts disabled), the interrupt will ... Z80 is in EI state (interrupts enabled), Z80 will operate ... to the interrupt routine. For IM0, it depends upon the instruction ... -
Fastest way to mirror a byte?I.E. turning 01100000 into 00000110, in assembly. I'm trying but I suck at stuff with rotation and the carry bit. Any pointers?
...
"Both types of interrupts increase the R register by ... accepted..."
This is incorrect. IM0 executes the instruction placed on ... -
Interrupt routineI have been trying to create an interrupt routine for playing AY music in the background but cant seem to get anything working. I have a music rou…
If you only enabled interrupts, after you have paged the ... it there until you disable interrupts again, it should work fine ... for is which interrupt mode (IM0, IM1 or IM2) you are ... you can change the ROM, IM0 and IM1 are not useful ... -
ZEsarUX Beta 8.1Hi! I have uploaded a new ZEsarUX 8.1 BETA version. You can download compiled versions for Windows, Mac, and the source code from: https://gith…
... , clearly shows that IM 0 interrupts, use a 6 clock INTA ... may see, I got the IM0 information talking with McLeod -
type in to learn about IM2I'm trying to mess around with learning about IM2 and I found a nice little article in Sinclair User September 1988, issue 78, Page 70-71 [url="https…
Yes, ei/di controls whether interrupts are enabled, separately from ld i,a/im0/im1/im2 changing the mode.
You can safely set the mode before you set i or create the vector table, provided interrupts are not enabled. -
Currah MicroSourceThis is an interesting one for the experts to mull over. I've got (and love) a MicroSource interface from Currah which consisted of an 8K ROM provid…
Best way to codeHi, I've been using Zeus Assembler to code MC programs so far. Nothing fancy just the odd scroll left or animation stuff. Wot I'd like to know is, …
... interested in knowing more about interrupts, ZX Specy addresses, masking, and ...NEW INTERFACE FOR ZX SPECTRUM!!Hi all zx-maniax! Here is a letter from Polish inventor, Yarek Adamski. He constructed a new brilliant interface for ZX SPECTRUM. Ready carrefuly i…
... Mouse).
Also can generate interrupts on every screen line as ...YM effects on Atari ST reproducable on Speccy?From the YM music format site: "SID-Voice SID-Voice is a great sound trick on the ATARI, because of low CPU consuming and great sound effects. It …
... , SID-Voice uses a CPU interrupts to produce a square tone ... -Buzzer uses an external CPU interrupts to write values in the ... ? Maybe we would get less interrupts per second, but couldn't ...Tough paging questionOK... Take this: 1. We have a program compiled and run from within GENS under a Pentagon 128K environment. 2. The program works perfectly. 3. We sav…
... use the ROM.
8. Interrupts are disabled all troughout the ...Yet another TR-DOS questionI have yet another TR-DOS problem. I am using "LD C, command; CALL #3D13" to call the system functions. The problem is that TR-DOS automatically enab…
... TR-DOS automatically enables the interrupts after it exits. Even if ...Z80 processor question...Suppose we fill the entire $0000-$ffff memory range with $ed. What will the processor do ? I suppose it will get locked, but will it still respond to…
Suppose we fill the entire $0000-$ffff memory range with $ed. What will the processor do ? I suppose it will get locked, but will it still respond to hardware interrupts ?
