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ROM emulation in softwareHi, first of all -- I only have shallow / uni knowledge of hardware, electronics, and physics. So forgive me for asking things that are out of that …
... is mapped into the whole Z80 CPU address range)...
... instruction execution (after the current Z80 instruction finishes) and take ... SRAM. Then generate a reset for the Z80, and release the active ... (non-active) while the Z80 accesses it, as the Sinclair ... -
ROM emulation in softwareHi, first of all -- I only have shallow / uni knowledge of hardware, electronics, and physics. So forgive me for asking things that are out of that …
... instruction execution (after the current Z80 instruction finishes) and take ... control of the Z80 CPU address, control and ... SRAM. Then generate a reset for the Z80, and release the ... />
Stopping the sacred Z80 sounds almost like a blasphemy ... -
ROM emulation in softwareHi, first of all -- I only have shallow / uni knowledge of hardware, electronics, and physics. So forgive me for asking things that are out of that …
... execution (after the current Z80 instruction finishes) and take ... SRAM. Then generate a reset for the Z80, and release the ... />
Stopping the sacred Z80 sounds almost like a blasphemy ... ROM" has been stored, either reset the Spectrum, or jump to ... -
ZX ROM in 64 characters a lineDear ZXS users, I am glad the today's release is not only concerning MB-02+ as it is normally the case with me, but it concerns really everyone, sinc…
... .speccy.cz/other/font64editor_for_divxxx.Z80[/url]
After reset you can use ... -
ROM emulation in softwareHi, first of all -- I only have shallow / uni knowledge of hardware, electronics, and physics. So forgive me for asking things that are out of that …
... .
5) 8266 will freeze Z80 and write contents of ROM ... a ROM) and
7) Reset the Z80.
Because I ... is not optimal. When I reset shift register it already has ... -
The point of IX+1 IX+2 ?the numbers that you can add-on to IX and IY seem hardcoded, so I dont see the use of that feature? any examples of the use of IX and IY plus number…
... /> or a ; ensure carry is reset to indicate valid function
z80 machines for more sophisticated programs ... -
ZX Spectrum 48K it only shows colored barsHello, I'm new to the forum and I need help with a ZX Spectrum 48K which I bought recently unfortunately defective. I want to mention that before t…
... is also possible that the Z80 or the ROM chip have ... you press and hold the reset switch for at least two ... s very likely that the Z80 CPU and the ROM ... working. In most cases, the Z80 CPU and the ROM chip ... display changes after a reset, then the Z80 CPU is at least ... -
Trying to repair a Speccy 48k - No PulsingI've had this machine for ages. I'd I've been putting off fixing it for some time now. So a couple of days ago I pulled it apart and started prob…
On the Z80, check the clock input ( ... at 3.5MHz and the reset input (pin 26) which ... removed (otherwise known as a 'reset switch'). If both of these ... okay, and none of the Z80 address and control output pins ... are pulsing, then the Z80 is most likely dead.
Trying to repair a Speccy 48k - No PulsingI've had this machine for ages. I'd I've been putting off fixing it for some time now. So a couple of days ago I pulled it apart and started prob…
... 6.
As for the reset. As far as I can ... .
I can repeat this reset (low to high) when shorting ... />
Will change out the Z80, and see how that works ...Thought this would be simple... Z80Hi Folks, Started to read "Beyond simple BASIC, Delving Deeper into your ZX Spectrum" by Dilwyn Jones. This is a great book and I came across the…
... write a mouse routine in Z80. I knocked up the following ...ZX Spectrum +3 repairI have my first +3 here, and it needs repairs. Hoping someone here can help me out. When I power it on I get this screen with black and white line…
... supply correct?
Does pressing reset have any effect? If you ... probe/'scope, also monitor the Z80 reset pin.
Is the CPU ... to pin 6 of the Z80?
What is the state ... the HALT, WAIT, INT, NMI Z80 inputs?
Are the MREQ ...ZX Spectrum +3 repairI have my first +3 here, and it needs repairs. Hoping someone here can help me out. When I power it on I get this screen with black and white line…
... when doing another reset. Strange behaviour. I removed the z80 cpu and ... on the machine without the z80 it show the same screen ...ZX Spectrum +3 repairI have my first +3 here, and it needs repairs. Hoping someone here can help me out. When I power it on I get this screen with black and white line…
... even if there is no Z80 CPU fitted)
[*]Provide the ... the Z80 has a clock and is not being held in reset ...Replacing lower RAM 4116 ZX Spectrum 48k - desoldering advice please?A long post, but interesting pictures perhaps. :) I'd like some advice: (also apologies I think I picked the wrong 'Hardware' category for this, plea…
... tried shorting the reset pin of the z80 to see if any ...ZX Spectrum +3 repairI have my first +3 here, and it needs repairs. Hoping someone here can help me out. When I power it on I get this screen with black and white line…
... the reset circuit may well be okay.
The Z80 CPU ... actually has a special reset mode and a ... held low.
Oxided reset switch contacts can cause problems ... Z80 may then see an erratic signal on it's reset input ...ZX Spectrum +3 repairI have my first +3 here, and it needs repairs. Hoping someone here can help me out. When I power it on I get this screen with black and white line…
... br /> The Z80 CPU actually has a special reset mode and ... a normal reset mode, depending ... on how long the reset pin is held low.[/quote ... .primrosebank.net/computers/z80/z80_special_reset.htm"]special reset mode[/url]. It ...ZX Spectrum +3 repairI have my first +3 here, and it needs repairs. Hoping someone here can help me out. When I power it on I get this screen with black and white line…
... for the reset circuit may well be okay.
The Z80 CPU ... actually has a special reset mode and a ... is held low.
Oxided reset switch contacts can cause problems ... Z80 may then see an erratic signal on it's reset input ...ZX Spectrum +3 repairI have my first +3 here, and it needs repairs. Hoping someone here can help me out. When I power it on I get this screen with black and white line…
... Have you tried a different Z80 CPU? The best method is ... to swap the Z80's between your two ... SOUND socket and the dodgy reset switch - now, most of ... Dataserve Retro sells Zilog Z80 processors recovered from scrapped ... that can test the Z80 to see that it ...Faulty ZX Spectrum 48kHi guys, I just got around to doing a composite mod on an old ZX Spectrum 48k that I got from Ebay a while back. It did say it was untested and b…
... white? If yes, then the Z80 CPU is at least managing ... run the beginning of the reset sequence code from the ROM ...What was the last Spectrum game you bought (in a shop)?Not counting recent-ish Cronosoft releases etc... what was the last ever game you bought before you packed your Speccy away and moved on to other pur…
... shop, they gave me Opera Soft's [b]Mot[/b] instead ... faulty and it tended to reset itself after a loading or ...ZEsarUX-7.0Hi! I have uploaded a new ZEsarUX stable version :) This is ZEsarUX 7.0 There are a lot of new features added, more than ever! You can downl…
... =`pwd`
ZESARUXLOCATION=~/Applications/Z80\ Emulation/ZEsarUX/zesarux.app/Contents ...ZX Spectrum 128k Toastrack with horizontal black and white barsSo I found a working 128k toastrack on a local auction site. After playing around with it for a few days I noticed the sound of the AY chip was reall…
... okay. If it’s the Z80 that kicked the bucket, it ... if your hold down the reset button?ZX Spectrum 128k Toastrack with horizontal black and white barsSo I found a working 128k toastrack on a local auction site. After playing around with it for a few days I noticed the sound of the AY chip was reall…
... if your hold down the reset button?[/quote]
No it ... checked pin 7 of the z80 and it has 3.1 ...Retro Virtual Machine is out!Fantastic emulator Retro Virtual Machine (@retrovm) is out today. It can emulates Amstrad/Sinclair models range. Give a try! http://www.retrovirt…
Retro Virtual Machine is out!Fantastic emulator Retro Virtual Machine (@retrovm) is out today. It can emulates Amstrad/Sinclair models range. Give a try! http://www.retrovirt…
Retro Virtual Machine is out!Fantastic emulator Retro Virtual Machine (@retrovm) is out today. It can emulates Amstrad/Sinclair models range. Give a try! http://www.retrovirt…
Retro Virtual Machine is out!Fantastic emulator Retro Virtual Machine (@retrovm) is out today. It can emulates Amstrad/Sinclair models range. Give a try! http://www.retrovirt…
... .z80 files correctly. It'll load the file and then reset.
z80 RVM2 implements a Zilog one ...Retro Virtual Machine is out!Fantastic emulator Retro Virtual Machine (@retrovm) is out today. It can emulates Amstrad/Sinclair models range. Give a try! http://www.retrovirt…
If Sinclair computers had not been sold...I was just having a random thought. If Sinclair Computers (or the rights to them, not sure how it 'worked' back then) had not been sold to Amstrad…
... port, built in joystick port, reset button, power switch, composite video ... +8, but with a 6MHz Z80 CPU, with selectable operating speed ...
