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Diagnosing a strange software fault in a 48kHi, A friend gave me a 48k, which I am very keen to restore. The spectrum 48k was my first computer over 20 years ago and I owe my ability to code t…
... whole address range of the Z80 CPU is available regardless of what ... -
Z80 new old stockHi. I found this on eBay but ... is there a way we could know they don't hav a faulty M1 line? [url]http://www.ebay.com/itm/Zilog-Z80-CPU-Z0840004PS…
... have used Zilog CMOS 10MHz Z80's from ic-china in ... as well, but not for Z80 CPU's.
I have ... a few Zilog CMOS 20MHz Z80's, hence my earlier question ... -
Pentagon RAM memoryDoes anybody know or have reference to technical docs, how no contention on RAM access is achieved in Pentagon 128K clone ? Looking at schematics it …
... uncontended video RAM and a Z80 CPU, so could have he. It ... -
Pentagon RAM memoryDoes anybody know or have reference to technical docs, how no contention on RAM access is achieved in Pentagon 128K clone ? Looking at schematics it …
... soldered on top of the Z80 CPU to fix "another" ULA problem ... -
Z80 new old stockHi. I found this on eBay but ... is there a way we could know they don't hav a faulty M1 line? [url]http://www.ebay.com/itm/Zilog-Z80-CPU-Z0840004PS…
... the card. Putting the original CPU back onto its place got ... also stock a range of Z80 CPU's (again from 4MHz to ... -
Pentagon RAM memoryDoes anybody know or have reference to technical docs, how no contention on RAM access is achieved in Pentagon 128K clone ? Looking at schematics it …
... core is ready with real Z80 CPU !!!
Good point is that ... -
Pentagon RAM memoryDoes anybody know or have reference to technical docs, how no contention on RAM access is achieved in Pentagon 128K clone ? Looking at schematics it …
... core is ready with real Z80 CPU !!!
Good point is that ... -
Spritual successor to the Speccy1988-1995 - Atari ST/STe/Falcon 1995-2000 - ? hmmm ? 2000-2006 - Playstation 2 with a keyboard 2007- ?
... the US, it uses a z80 cpu, it is more colourful than ... -
ZX Spectrum + 2 128K - Video Issue?Hi All, I have just picked up a secondhand +2 and am having a problem with it. :( When I power the unit on and hook it up to my TV with the RF cable…
... section is faulty, or the Z80 CPU is faulty. Both are fixable ... -
ZX Spectrum + 2 128K - Video Issue?Hi All, I have just picked up a secondhand +2 and am having a problem with it. :( When I power the unit on and hook it up to my TV with the RF cable…
... section is faulty, or the Z80 CPU is faulty. Both are fixable ... -
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…
... , as it means that no Z80 emulation out there is actually ... make me believe that the Z80 CPU has an internal register, which ... (or in case of NEC CPU's set to some partially ... -
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…
... www.z80.info/zip/z80-documented.pdf"]The Undocumented Z80 Documented ... esoteric register of the ZiLOG Z80 CPU[/URL]
[URL=" ... /> [URL="http://www.z80.info/z80arki.htm"]Z80 CPU architecture[/URL]
... how accurate Z80 emulation is. If a Z80 emulator passes ... -
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…
... +, issue 4b, with a Zilog Z80 CPU.
All tests pass ... a +2a with a Zilog Z80 CPU.
Testing on a ... , with a NEC D780c-1 Z80 CPU, the results are:
-Z80 MEMPTR TEST
- All tests ... -
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…
... accepted this and adjusted their CPU core accordingly, and life went ... +, issue 4b, with a Zilog Z80 CPU.
All tests ... a +2a with a Zilog Z80 CPU.
[/QUOTE]
... /> [QUOTE]
NEC 780
-Z80 CCF TEST:
- 000 SELF ... -
How far are we from a single-chip 100% ZX Spectrum compatible solution?I really like to read about the projects of some geniusses here on WoS who are working on their ZX Spectrum clones. IMHO some main steps that have b…
... solution would be a real Z80 CPU, a single flash or EPROM ... -
How far are we from a single-chip 100% ZX Spectrum compatible solution?I really like to read about the projects of some geniusses here on WoS who are working on their ZX Spectrum clones. IMHO some main steps that have b…
... /> Don't forget, ALL the Z80 control signals have to be ... very close to a real Z80 CPU. -
How far are we from a single-chip 100% ZX Spectrum compatible solution?I really like to read about the projects of some geniusses here on WoS who are working on their ZX Spectrum clones. IMHO some main steps that have b…
... /> Don't forget, ALL the Z80 control signals have to be ... very close to a real Z80 CPU.[/QUOTE]
I was ... -
SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]
... ;674206]could either of the z80's in these interfaces access ... doesn't have its own Z80 CPU. All logic on the SPECTRA ... -
Another cause for DivIDE problems on 48K'sThe last months some topics were opened to discuss problems with 48K ZX Spectrums and DivIDE. Sofar we found: - Bad Z80's because of poor fanout (si…
... />
You have a faulty Z80 cpu (M1 line), replace it and ... -
Another cause for DivIDE problems on 48K'sThe last months some topics were opened to discuss problems with 48K ZX Spectrums and DivIDE. Sofar we found: - Bad Z80's because of poor fanout (si…
... ;678208]You have a faulty Z80 cpu (M1 line), replace it and ... -
Which type of Z80 cpu to use with ZX 48?Which type of Z80 cpu can I use with ZX 48? Only the 4 MHz cpu's or some with more MHz? Did not know if a 6 MHz cpu runs in a ZX 48 with 4 MHz. Mic…
I use a Zilog Z84C0006PEG CMOS 6 MHz Z80 cpu. Works very well.
Micky
[B]
[/B] -
Spectrum 128k +2 grey and EPROMhi all, i am try to fix my spectrum, right now i am little on dead end... i think a good idea is to test RAM/ROM on the Spectrum so i will try to c…
... or control lines between the Z80 CPU and the rest of the ... short circuit) will prevent the Z80 CPU from reading the correct information ... from the ROM. The Z80 will then only read rubbish ... -
Spectrum 128k +2 grey and EPROMhi all, i am try to fix my spectrum, right now i am little on dead end... i think a good idea is to test RAM/ROM on the Spectrum so i will try to c…
... or control lines between the Z80 CPU and the rest of the ... short circuit) will prevent the Z80 CPU from reading the correct information ... from the ROM. The Z80 will then only read rubbish ... -
Spectrum 128K +2 problemhello, i am try to repair my spectrum 128k +2 grey, i remove all ram chips and i have some new ones spares, now i have remove all ram chips, i want …
... or control lines between the Z80 CPU and the rest of the ... short circuit) will prevent the Z80 CPU from reading the correct information ... not doing anything. If the Z80 CPU is okay, this can only ... 470 resistors to allow the Z80 CPU and the ULA to operate ... -
RAM Diagnostic ROMhi all, i burn this ROM from here [url]http://www.fruitcake.plus.com/Sinclair/Interface2/Cartridges/Interface2_RC_New_RAM_Tester.htm[/url] and i a…
... ]
The Z80 CPU is a 8 bit (8 ... communication channel between the CPU and the memory is ... chips which memory location the CPU wants to access.
Z80 CPU (IC9) and the ROM ... "A0" line between the Z80 CPU (IC9) and IC10 (Amstrad ... -
RAM Diagnostic ROMhi all, i burn this ROM from here [url]http://www.fruitcake.plus.com/Sinclair/Interface2/Cartridges/Interface2_RC_New_RAM_Tester.htm[/url] and i a…
... the "A0" line between the Z80 CPU (IC9) and the ROM socket ... the "A0" line between the Z80 CPU (IC9) and IC10 (Amstrad 40058 ... -
RAM Diagnostic ROMhi all, i burn this ROM from here [url]http://www.fruitcake.plus.com/Sinclair/Interface2/Cartridges/Interface2_RC_New_RAM_Tester.htm[/url] and i a…
... QUOTE=1024MAK;690972]The Z80 CPU is a 8 bit ... communication channel between the CPU and the memory is ... chips which memory location the CPU wants to access.
Z80 CPU (IC9) and the ROM ... "A0" line between the Z80 CPU (IC9) and IC10 (Amstrad ... -
I thought I'd give assembly a goAnd well being an absolute newb,I'm absolutely useless.I need your help. I thought I'd give this a go in zxspin [url]http://chuntey.wordpress.com/20…
... www.zilog.com/docs/z80/ps0178.pdf"]Z80 CPU Product Specification[/URL]. ... zilog.com/docs/z80/um0080.pdf"]Z80 Family CPU User Manual[/URL ... (duh... they produced the first Z80's, IIRC :-) ). As ... ], I normally check Zilog's Z80 Product Specification.
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... the interrupt pulse, not when Z80 CPU acknowledges it (which is at ... ULA related thing and not CPU related, it makes sense to ... FAQs were written from the CPU point of view, but since ...
