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hash function permutation tableI'm using a simple Pearson hash function to generate keys for a $(103,6) array using a 256-byte permutation table. How do I arrange the entries in th…
... digit multipliers in
b = m1*x1 + m2*x2 + m3*x3 ... ]
So, you try m1,m2,etc. with numbers in ... -
hash function permutation tableI'm using a simple Pearson hash function to generate keys for a $(103,6) array using a 256-byte permutation table. How do I arrange the entries in th…
m1 to m6 can be in the range 0-9. This is purely to make the calculations in BASIC faster. I choose the most 0s and 1s in m1 to m6 to make the BASIC hash calculation even faster. -
PlusDlite problems with 128K modelsLast year I developed the PlusDlite, and already shipped out a couple of them. Only recently I discovered some problems with 128K models. I remember…
PlusDlite problems with 128K modelsLast year I developed the PlusDlite, and already shipped out a couple of them. Only recently I discovered some problems with 128K models. I remember…
... problem?
I presume /M1 has been checked?
/M1 can't be a cause ... there other potential problems with /M1 than 'not being there' when ... known voltage level problems with /M1 maybe?PlusDlite problems with 128K modelsLast year I developed the PlusDlite, and already shipped out a couple of them. Only recently I discovered some problems with 128K models. I remember…
... , like /IORQ, /RD, /WR, /MREQ, /M1 or something else?
We ... know /M1 is sensitive, so maybe that ...PlusDlite problems with 128K modelsLast year I developed the PlusDlite, and already shipped out a couple of them. Only recently I discovered some problems with 128K models. I remember…
Scratch that, didnt actually attempt to use the PlusDLite then, just turned it on and saw the menu. Just tried it and its not recognising its there, probably a duff M1 line on this one then, have to keep looking to see if I have another!PlusDlite problems with 128K modelsLast year I developed the PlusDlite, and already shipped out a couple of them. Only recently I discovered some problems with 128K models. I remember…
... this has a known working M1 line. Strange behaviour though, with ...PlusDlite problems with 128K modelsLast year I developed the PlusDlite, and already shipped out a couple of them. Only recently I discovered some problems with 128K models. I remember…
... this has a known working M1 line. Strange behaviour though, with ...PlusDlite problems with 128K modelsLast year I developed the PlusDlite, and already shipped out a couple of them. Only recently I discovered some problems with 128K models. I remember…
... that had problems were good M1 lines, I would like to ...PlusDlite problems with 128K modelsLast year I developed the PlusDlite, and already shipped out a couple of them. Only recently I discovered some problems with 128K models. I remember…
... that had problems were good M1 lines, I would like to ...Weird tv output by spectrum 48kI recently got a spectrum 48k and hooked it up to my tv. After finding channel 36, I get a really weird picture for the spectrum, why is that? Below…
... /> Check the CPU for the M1 line (my replacement CPUs are ... dated 1991 and have excellent M1 lines) so that Multifaces and ...Weird tv output by spectrum 48kI recently got a spectrum 48k and hooked it up to my tv. After finding channel 36, I get a really weird picture for the spectrum, why is that? Below…
... new Z80 due to duff M1 lines. The composite mod is ...PlusDlite problems with 128K modelsLast year I developed the PlusDlite, and already shipped out a couple of them. Only recently I discovered some problems with 128K models. I remember…
... attached (1V/div):
/M1:
[IMG]http://benophetinternet ... .nl/hobby/vanmezelf/badz80/M1.JPG[/IMG]
/IORQ ...PlusDlite problems with 128K modelsLast year I developed the PlusDlite, and already shipped out a couple of them. Only recently I discovered some problems with 128K models. I remember…
... have been added to the M1 line and the busrequest line ...PlusDlite problems with 128K modelsLast year I developed the PlusDlite, and already shipped out a couple of them. Only recently I discovered some problems with 128K models. I remember…
... have been added to the M1 line and the busrequest line ...PlusDlite problems with 128K modelsLast year I developed the PlusDlite, and already shipped out a couple of them. Only recently I discovered some problems with 128K models. I remember…
... this has a known working M1 line. Strange behaviour though, with ...Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... properly is any clone with M1 delays (Leningrad, Scorpion). I know ...Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... similar way we already count M1 accesses for RZX replay. It ...4294967296 pseudo output portsIn an effort to avoid any hardware conflicts with the clashbasher interface I've been looking for an alternative to using the spectrum's ports for ou…
... . It mentions that the M1 line needs to be considered ... work on machines with faulty M1 lines so I haven' ... t used M1 for decoding opcode reads. ... , which always follows the M1 and has to be working ... work out which reads are M1.
So it still ...4294967296 pseudo output portsIn an effort to avoid any hardware conflicts with the clashbasher interface I've been looking for an alternative to using the spectrum's ports for ou…
... whatever it was that including M1 was there to solve (something ...4294967296 pseudo output portsIn an effort to avoid any hardware conflicts with the clashbasher interface I've been looking for an alternative to using the spectrum's ports for ou…
... reason why you should decode /M1 for a I/O port ...4294967296 pseudo output portsIn an effort to avoid any hardware conflicts with the clashbasher interface I've been looking for an alternative to using the spectrum's ports for ou…
... reason why you should decode /M1 for a I/O port ...4294967296 pseudo output portsIn an effort to avoid any hardware conflicts with the clashbasher interface I've been looking for an alternative to using the spectrum's ports for ou…
... reason why you should decode /M1 for a I/O port ... the ZXI spec. If decoding !M1 is truly unecessary to prevent ...SCF/CCF flags - new discoveryI can't believe that no one is interested in discussing the additional, previously undocumented internal state of the Z80 CPU I have discovered recen…
... at the start of each M1 cycle, I will save the ...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…
... . Each NOP consists of one /M1 cycle with[/FONT] [FONT=sans ...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…
... prefixes seem to have separate M1 cycles for the prefix and ...LDI questionWhen using LDI (or LDD) is it possible to access the value that is transfered from (HL) to (DE), or does the Z80 use an internal data cache to store …
... expect it to be:
M1 fetch ED
M2 fetch ... expect INI to be:
M1 fetch ED
M2 fetch ...DivMMC and K-Mouse Turbo incompatibilityToday I tested a setup someone wants to use, but of which he can't get the K-Mouse Turbo working. The setup contains of: - ZX Spectrum 128K (toastra…
... if detect IORQ=0 and M1=0. But if CPU use ... too low logic level of M1 line.
You can ... on K-MOUSE interface - disconnect M1 line from zx bus and ... k-mouse signal +5V instead M1. Now will kmouse not use ... I mean - bad quality of M1 logic level. You can swap ...Please explain how a Kempston interface circuit works.Can someone help me understand how a Kempston joystick interface works, as I want to design and build my own as an experiment. I understand switches…
... can see that some use M1 because it's high, not ... something else high, and use M1.
But then in ... /> But it ignores !RD and M1, aso can't tell an ...
