... the Spectrum's clock and our regenerated clock each cycle of the 112MHz ... edge of the next Spectrum clock cycle, the regenerated signal is already ... - one counting Spectrum clock cycles since contention started, and one counting regenerated clock cycles ...

Hi,
Does anybody knows exactly when the ula halts the Z80 clock during a memory r/w cycle?
I mean which Z80 clock cycle, T1 or T2?

Thanks..

... that wastes hundreds of clock cycles and I don ... to meet. If the average clock cycle / instruction on the 6502 ... mean you save 200 clock cycles for every point ... and if the average cycle time is over 4 ... in code aren't by counting clock cycles. It's by ...

... busses during half of every clock cycle, thus giving the VIC-II ... in C64, has a read cycle of 280ns, which I find ... last 53 T-states, not counting RET.

[QUOTE=Alcoholics ...

... data for every concievable AY clock cycle, and also, a kind of ...

... data for every concievable AY clock cycle, and also, a kind of ...

... />
How many instructions per cycle can the Speccy do?
clock cycle, other?

It would be even if paging took time - more than one clock cycle at least - the memory is a copy. There is no floating zone where the databus is inconclusive.

... for the majority of the clock cycle in most 2D games. Blitz ...

... data for every concievable AY clock cycle, and also, a kind of ...

... pipelined architecture for 1 instruction/clock cycle...


But playing ...

... the leading edge of a clock cycle only, which is edge-triggering ...

... the leading edge of a clock cycle only, which is edge-triggering ... the rising edge of a clock because of internal z80 circuitry ... occur asynchronously with the z80 clock. The flip-flop retains the ...

... code down to the last clock cycle and then you go and ... forget to reset your VCR clock???! Tut tut. :D

... code down to the last clock cycle and then you go and ... forget to reset your VCR clock???! Tut tut. :D
[/quote ...

... reduce the number of high clock cycle routines/calls you can. You ... can't just count clock cycles here or there though ...

... . But, that can be a clock cycle waster if the C64 doesn ...

... the 6502 only takes 1 clock cycle, where on the Z80 many ...

... the 6502 only takes 1 clock cycle, where on the Z80 many ... definitely aren't all single cycle instructions. And the 6502 is ...

... 6502 series, used a single clock cycle to generate the timing for ... the base cycle (not just rising edges), and another clock 90 degrees ... and two falling edges per cycle) - this allowed instructions to ... execute in one external 'cycle' rather than four for ...

... - most instructions execute in one clock cycle) could emulate the ULA in ...

... their work in 17ns (each clock cycle on the Speccy is something ...

... accesses memory in half the clock cycle so any display hw could ...

... already loaded data as the clock cycle whilst processing instructions is will ...

[quote=BloodBaz;187144]Decrypters can use the R register to decode the already loaded data as the clock cycle whilst processing instructions is will defined (assuming interrupts are disabled of course)[/quote]

Ah right, that's pretty cool! :)

... volts).
About half a clock cycle later, IORQ goes from high ... condition persists for a few clock cycles.

Then IORQ ... again, and about half a clock cycle later, A0-A7 and D0 ...

... ),A to exactly the right clock cycle - 16x1 (only as a one ...

... ),A to exactly the right clock cycle - 16x1 (only as a one ...

Windows XP is more tolerant (modulo product activation) than Win2K or heaven forbid >=Win95