... ;454161]Not according to the Z80 User Manual, it doesn't ... make the Z80 miss an interrupt by having an overly long instruction (prefix ...

... br />
From ZILOG's Z80 Family CPU User Manual:
z80/um0080.pdf[/url])
< ... a single byte instruction. Alternatively, any other
instruction such as a ... the detailed timing for an interrupt
response. After the ...

... br /> synchronizing what to an interrupt.....hold on what's an ... times a second (an interrupt is something that temporarily ... HALT instruction to make the Z80 wait until the next interrupt ... occurs. After the HALT instruction ...

... for a reference on the Z80 instruction set. It will tell you ... Z80 instructions with the number of CPU cycles (T-states) each instruction ... off using the 'DI' (disable interrupt) instruction, the 'HALT' command will never ...

... program, and the EI instruction is executed, it ...
Besides, an interrupt control register for each device ... a general Z80 computer, capable of having multiples interrupt sources. ... there's neither interrupt status registers, nor interrupt control registers, ...

... do them in a single instruction :-) Having to constantly shuffle ... a tradeoff: when the 8080, Z80, 6502 et al. were ... to make a really compact instruction set (variable length instructions, ... less important, and things like interrupt latency and the ability to ...

... . For example; the Zilog Z80 is an 8/16 BIT ... registers.

RISC (reduced instruction set computer) and CISC (complex ... enough to start with. The Z80 can easily emulate your design ... finished projects than one large unfinished mess. If you are stuck ...

... we're also talking of Z80 based machines which don't ... in hand (as well as interrupt latency: they rejected one 16 ... BBC Micro" because the multiply instruction took around 300 clocks and ... could lead to very bad interrupt latency, enough that it would ...

... threads. One for the Z80 and AY emulation, running ... only get rendered when the Z80 emulation thread is waiting ... br /> {
execute one instruction;
every 79 tstates update ... etc...
}

On interrupt
{
draw buffer to ...

... timers. just z80 and current switching using the out instruction (and i ... N bytes per IM1 50Hz interrupt. so when IM1 occurs you ... 0 and wait for another interrupt. by intelligently setting N one ... -to-send). at next 50Hz interrupt zx spectrum spots the RTS ...

... end, and as the last instruction before the HALT, SP is ...
[B]Zilog Z0840020PEC. CMOS Z80 CPU, 20MHz[/B]


In the "The undocumented Z80 documented" this can be read ... /> Also since the Z80 is 8080 compatible, interrupt mode is probably 0 ...

... I supposed to place my interrupt handler routine (handle_interrupt() ... there any need for interrupt handling routine in this ... After all, the only interrupt-like event comes from ... And what do those interrupt handling routines at 38H ... or even in Z80 assembly.

... already read the descriptions of .Z80 and .SNA files formats, ... the address of the first instruction to be fetched? Is ... consider different Spectrum models, interrupt frequencies or video synchronization types ... block of data in .Z80 files. I read the description ...

... QUOTE]
This first instruction you need to execute ... consider different Spectrum models, interrupt frequencies or video synchronization ...
[QUOTE]
3. .Z80 header contains the value of ... remember the specifics of Z80 compression without looking at ...

... cpu addressing its interrupt by watching the interrupt acknowledge cycle ... , devices can stop generating the interrupt.

However, ... for a RETI instruction while their interrupt node is active ... not normally discussed in z80 books because very few ...

... interrupt we're supposed to check if PC points to HALT instruction ... supposed to check if the Z80 is halted. That, as you ...

[QUOTE]
It's very easy to write to ROM - I can do it right now, with (as you stated) a simple LD (HL),n opcode with HL set to

... user to do whatever the z80 would allow them to do ... is a HALT instruction immediately after return from interrupt handling routine, should ... HALT. What else could a z80 possibly do?

D ...

... engine to use in a Z80 program I'm writing, but ... least amount of time every interrupt.
I tried Romford from ... playing on beeper AND executing instruction at once

... 's [URL="http://z80.info/zip/z80-documented.pdf"]document[/URL ... br /> Is incorrect. The z80 has always had a documented ... incremented according to what that instruction is once for each ... />
The discussion on interrupt modes completely ignores how IM2 ...

... games in Z80 assembly without needing to memorise the whole instruction set ... :

- to know every instruction
- to know instructions opcodes ... :) )
- to set your own interrupt handlers
- to use binary ...

... is as fast as the z80. The instruction set (which encourages use ... page, small stack size, etc. z80>8080 (clearly), 6809 > ... though so I would go z80 overall. Cheapest and most power ... o architecture, memory, interrupt regime, etc. A z80 and I would accept ...

... 'll need a chart of Z80 instruction T-states to hand as ... -states being the fastest OUT instruction available. This was considerably better ... /> For music, a 2-channel, interrupt-driven time-limited routine should ...

... triggered and acknoledged interrupt causes the Z80 to do a CALL ... with the DI instruction. The EI instruction enables them again ... and you cannot trigger an interrupt manually (but you can ... "simulate" an interrupt by calling directly the interrupt handler, for ...

... triggered and acknoledged interrupt causes the Z80 to do a CALL ... with the DI instruction. The EI instruction enables them again.< ... "simulate" an interrupt by calling directly the interrupt handler, for ... />
Does the interrupt push the registers and the ...

... reason that one generation of z80 can be faster than ... 70s, a reimplementation in followup z80 models like the z380).
z80, macro tasks like read to memory, write to memory, acknowledge interrupt ... , for example, is an instruction fetch operation that takes 4 ...

... I try to load that Z80 file.
And on a ... instruction (like an LDI), it'll finish that before letting the interrupt ... to the start of the interrupt routine. If you control it ... always used HALT before the interrupt occurs, you can still get ...

... ), so it has an interrupt pin tied to this condition ... . The interrupt code in the microcontroller runs ... a Z80 I/O cycle (700ns).

[code];Interrupt latency ... interrupt to the end of "mov COLUMNHEADER,A"
;instruction to meet Z80 ...

... will usually be Z80 machine code; a Z80 disassembler/debugger is needed ... in the ROM's keyboard interrupt routine. Jumping to the RET ... of that and stepping one instruction will usually put you somewhere ...