-
in quest for a z80 :DI am trying to find a Z80A in some retail shops here in Greece. I have only located the following CPUs branded as either Z80 without anything else o…
[QUOTE=Pyjamarama]Hi
I managed to find a Z80 but I do not know if it is the right one
Z84C0008PEC
Z80 CPU
0124 74
I hope it is the one (...anxious...)[/QUOTE]
Z84C 0008 PEC -
Cro S2008Hi everybody!!! I hope this is right thread? :-) I want to share with you my new project. I call it ?S2008?? The idea was to build Spectrum48K clo…
... /> NMOS Z80CPU instruction OUT (c),0 work on CMOS version as OUT (c),255 ........
ZX Spectrum 48K clone and test resultsHi! This is my first post, so, first of all, I'd like to say hello to the whole community! I am Alessandro Dorigatti from Italy and I'm developing …
IRContention is likely running fine for you. See the notes about the undocumented OUT (C),0 opcode [URL="http://www.z80.info/z80sean.txt"]here[/URL]. If your CPU was outputting 255 then you'd have the white border and a low beeper tone :)ZX Spectrum 48K clone and test resultsHi! This is my first post, so, first of all, I'd like to say hello to the whole community! I am Alessandro Dorigatti from Italy and I'm developing …
... the notes about the undocumented OUT (C),0 opcode [URL="http://www.z80 ... , it outputs 255 for the OUT (C),0 opcode.
So, I ...ZX Spectrum 48K clone and test resultsHi! This is my first post, so, first of all, I'd like to say hello to the whole community! I am Alessandro Dorigatti from Italy and I'm developing …
... the notes about the undocumented OUT (C),0 opcode [URL="http://www.z80 ...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…
... there's an specific instruction "OUT (C),0" already (use "defb $ED, $71 ...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=Einar Saukas;623656]there's an specific instruction "OUT (C),0" already[/QUOTE]
Cheers. I'll add that at some point. :)New Z80 CPU emulation testerI have finally wrapped up the new [URL="http://zxds.raxoft.cz/taps/misc/z80test-1.0.zip"]Z80 tester package[/URL] I have previously announced in [URL…
... : 05D38510 EXPECTED: 226855E0
098 OUT (C),0 CRC: FEF7095A EXPECTED: 226855E0
New Z80 CPU emulation testerI have finally wrapped up the new [URL="http://zxds.raxoft.cz/taps/misc/z80test-1.0.zip"]Z80 tester package[/URL] I have previously announced in [URL…
The "best" Z80?What's the best Z80 for Spectrums? I know there are differences between brands (Nec, Zilog, Thomson) and technologies (CMOS, NMOS), so what Z80 woul…
... /> Yes. If you use instruction OUT (C),0 then NMOS CPU write value ... 0 to port BC, but CMOS ... />
LD BC,254
OUT (C),0
If you see ...The "best" Z80?What's the best Z80 for Spectrums? I know there are differences between brands (Nec, Zilog, Thomson) and technologies (CMOS, NMOS), so what Z80 woul…
... ]Yes. If you use instruction OUT (C),0 then NMOS CPU write value ... 0 to port BC, but CMOS ... />
LD BC,254
OUT (C),0
If you see ...The "best" Z80?What's the best Z80 for Spectrums? I know there are differences between brands (Nec, Zilog, Thomson) and technologies (CMOS, NMOS), so what Z80 woul…
... ]Yes. If you use instruction OUT (C),0 then NMOS CPU write value ... 0 to port BC, but CMOS ... />
LD BC,254
OUT (C),0
If you see ... /> 30 RANDOMIZE USR 50000 : PAUSE 0
[/CODE]
and ...The "best" Z80?What's the best Z80 for Spectrums? I know there are differences between brands (Nec, Zilog, Thomson) and technologies (CMOS, NMOS), so what Z80 woul…
... ]Yes. If you use instruction OUT (C),0 then NMOS CPU write value ... 0 to port BC, but CMOS ... am very interested to find out, whether the original 48k/128k ...The "best" Z80?What's the best Z80 for Spectrums? I know there are differences between brands (Nec, Zilog, Thomson) and technologies (CMOS, NMOS), so what Z80 woul…
... how to check what an out (c),0 does without any human involvement ... change in the behaviour of out(c),0 was a bit of bad ... command. However, it actually turned out a useful feature for my ...Border art viewerRecently, we were working with diver/4d on border art. The idea was to push the techniques of drawing on the border to the limit and to see, how much…
... : the undocumented instruction
[CODE]out (c), 0[/CODE]
actually outputs #FF ...Border art viewerRecently, we were working with diver/4d on border art. The idea was to push the techniques of drawing on the border to the limit and to see, how much…
... processor this is: you simply out(c),0 into an AY register and ...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…
... the time CMOS variants came out, so many people were using ... little known fact that OUT (C),0 actually behaves as OUT (C),255 when using ...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…
... little known fact that OUT (C),0 actually behaves as OUT (C),255 when using ...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…
... that Q takes the value 0 if flags change, but takes ...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…
... , however, there are situations where out (c),0 is an absolutely priceless instruction ...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…
... needs to use all 8 out (c), r/n commands to achieve ... practical use of determining the OUT (C),0/255 behaviour, I'll make ...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…
... , however, there are situations where out (c),0 is an absolutely priceless instruction ...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…
... 's still okay to use OUT (C),0 and OUT (C),255 as introspec is ...Issue 3 expansion connector problemI am having problems with an issue 3 Spectrum, that otherwise works fine, but does not recognize either the Interface 1 or DivMMC/Enjoy (which are bo…
... : the (indocumented) OUT (C),0 instruction behaves as if it was OUT (C),255.
IXL and IXHI don't know much about undocumented instructions but I get the impression that [b]LD A,IXH[/b] or [b]LD A,IXL[/b] (B, C, D, E also fine, HL not) are…
... to e.g. something like OUT (C),0 which actually has different behavior ...IXL and IXHI don't know much about undocumented instructions but I get the impression that [b]LD A,IXH[/b] or [b]LD A,IXL[/b] (B, C, D, E also fine, HL not) are…
... the out (c),0 instruction.
a CMOS Z80 outputs $FF for the out (c),0 ...IXL and IXHI don't know much about undocumented instructions but I get the impression that [b]LD A,IXH[/b] or [b]LD A,IXL[/b] (B, C, D, E also fine, HL not) are…
... the out (c),0 instruction.
a CMOS Z80 outputs $FF for the out (c),0 ...New emulator: InkSpector 2Hi, The first preview of InkSpector 2 is available from www.inkland.org.uk/inkspector/inkspec_2.0.0.27.exe It's a brand new emulator with all …
Haha is Spud dis'ming "out (c),0" as "out (c),f" as InkSpector was til ...Can someone run this test program on a real Spectrum 48K?I've knocked up a small test program just to satisfy my emulation OCD if someone with a real 48K Spectrum can spare a couple of minutes to run it.? …
... undocumented command is executed differently OUT (c),0
upd:
[img ...
