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Writing an emulator - how to / resourcesI'm looking for a holidays project, and I'm thinking I'd like to write a simple Spectrum emulator. I've googled plenty and read some resources, but …
... simple ZX Spectrum emulator, or Z80 CPU emulator? There is way more ... simple emulator there is just Z80 emulation code, screen memory conversion ... emulator, using an existing Z80 core is a good way ... to go. Otherwise, write Z80 emulator first.
... -
Writing an emulator - how to / resourcesI'm looking for a holidays project, and I'm thinking I'd like to write a simple Spectrum emulator. I've googled plenty and read some resources, but …
... scratch, obviously starting with the Z80 cpu. I never quite got far ... use an off the shelf Z80 emulator, but on the basis ... -
A misbehaving DivIDE 57c (Now repaired)Hello there my fellow WoS'ers Indeed it has been a while since my last post, please let me wish you all a (belated) Happy New Year, my this year bri…
... these units have a new Z80 CPU with Good M1 and NMI ... from Pin 17 of the CPU all the way to the ... and Pin 17 of the CPU - upon button press the NMI ... -
Faulty rubber speccy - advice neededHello all speccy hardware gurus :) Recently I moved to a new flat and after a long time have some space (and time) to dig out my old Speccy hardware…
... -) not your case
2-) Z80 cpu
3-) ROM or ULA ... -
Faulty rubber speccy - advice neededHello all speccy hardware gurus :) Recently I moved to a new flat and after a long time have some space (and time) to dig out my old Speccy hardware…
... -) not your case
2-) Z80 cpu
3-) ROM or ULA ... working mbo. That leaves the Z80, ROM or the lower RAM ... -
MEMPTR: Is it worth emulating?Some advice if you will :) The only info I have on MEMPTR is this document here: [url]http://zx.pk.ru/showpost.php?p=43800[/url] I notice SpecEmu h…
... unofficial Russian clones of the Z80 CPU do not show the same ... MEMPTR behaviour as the original CPU. I think some of these ... -
Dark StarBeen playing Dark Star again and added it to my blog at [URL="http://zxspectrumgames.blogspot.com/2012/03/darkstar-zx-spectrum-this-retro-classic.htm…
... development machines based on the Z80 CPU. This at a time when ... -
Giving Away ZX Spectrum Collection Free - Adelaide, South AustraliaI will give away my collection of ZX Spectrum stuff to anyone who can pick it up. Please PM me if you are interested. [U]Books[/U] The Spectrum Oper…
... and programming on the Z80 cpu. Working with the Z80 instruction set was ... -
ZX Spectrum TowerHi all, i am working on a ZX Spectrum 48K build in a PC tower case. Is there anyone who did it before? I have some questions duo the PSU. I have to g…
... . And it is cooling the Z80 cpu also....
There are ... -
ZX Spectrum TowerHi all, i am working on a ZX Spectrum 48K build in a PC tower case. Is there anyone who did it before? I have some questions duo the PSU. I have to g…
... . And it is cooling the Z80 cpu also....
There are ... -
Embarrassing MHz question....(Hangs head in shame; you may throw tomatoes and mouldy fruit at me.) What is the standard speed (exact please!) of the Z80 CPU in a 48K ZX Spectrum…
... ; 48 K
Emulation -> Z80 CPU Speed = 3.54MHz
Z80 -> CPU Speed -> 3.54 MHz -
30 years article - Speccy Vs C64 Digital Spy magazine[url]http://www.digitalspy.co.uk/gaming/news/a377768/zx-spectrum-vs-commodore-64-gamings-greatest-rivalry.html[/url] Please leave your comments for …
The better computer ?
ZX-Spectrum, the Z80 CPU has a much better instruction set, 16 bit registers to begin with..... -
What if there was no memory or space limitation?What if there was no memory or space limitation? We've had topics about the limitations of the Speccy's hardware, topics where we discussed how good …
... sound? the c128 has a z80 cpu as well and so did ... the bbc , 6502 or z80 IRC.. obv 16 bitters had ... -
My divide killed my toastracknow it boots with garbage and z80 overheats a lot will replacing z80 solve it , or something else can be bad?
i was reconnecting divide and kempston + interface and it slipped away with the computer on
the no more boot up screen , and z80 cpu overheating -
My divide killed my toastracknow it boots with garbage and z80 overheats a lot will replacing z80 solve it , or something else can be bad?
... but I think the only Z80 CPU's you will find with ... -
Seems my DivIDE is not working.I recently received a DivIDE kit. Built it up, then tried it. I got a hung up Spectrum and I noticed that I had made a mistake. I swapped a LS245 wit…
... bad M1 line from the Z80 CPU or slight timing/frequency imperfections ... from the Z80 CPU itself and replacing the Z80 in both instances ... -
My Issue 2 spectrum"IT'S ALIVE!!!!!" - Dr Frankenstein I got my issue 2 spectrum up and running, colours and all. I borrowed socketed lower ram from my issue 3 that is…
... already using a low powered z80 cpu, so it is running cooler ... -
No video in Spectrum 128k +2A Grey[B][COLOR="red"]EDIT: 26-05-2012 = Thread topic edited[/COLOR][/B] Hi everyone, Recently i won a Spectrum 128k +2A Grey at ebay UK. The Spectrum …
[QUOTE=guesser;631642]I suspect a RAM fault.
What happens if you power on while holding the break key?[/QUOTE]
I already try that.
Nothing, full black screen.
The ram are the 2 chips near the Z80 CPU ? -
No video in Spectrum 128k +2A Grey[B][COLOR="red"]EDIT: 26-05-2012 = Thread topic edited[/COLOR][/B] Hi everyone, Recently i won a Spectrum 128k +2A Grey at ebay UK. The Spectrum …
... the 2 chips near the Z80 CPU ?[/QUOTE]
No, those ... -
No video in Spectrum 128k +2A Grey[B][COLOR="red"]EDIT: 26-05-2012 = Thread topic edited[/COLOR][/B] Hi everyone, Recently i won a Spectrum 128k +2A Grey at ebay UK. The Spectrum …
4116 replaced by 4164 - "Noisy" paper?After I replaced my 4116's with 4164's and hooked them up to +5V, disconnected -5V and +12V, I have what looks like vertical lines in the paper, like…
... can happen with a CMOS Z80 CPU (which has much lower ... output impedance of the CPU is sufficiently low (or ... same time that the CPU was using upper RAM ... stuff happening on the CPU half). Resistor values can ... otherwise they will cause CPU writes to lower memory ...ESXDOS v0.8.0 released (with NMI Browser)Hello, To celebrate the speccy's 30th birthday, here's the latest version of ESXDOS for DivIDE users. The full changelog is too long to post here, s…
... often a problem with the Z80 cpu.
But let me ...Known Z80 M1 problems?I got an email yesterday from someone asking for a Z80 without the M1 problem. I only know about the fanout problem that many Z80's are suffering of…
... from some batches of the Z80 CPU were simply too weak a ... failt) I discovered that the Z80 expansion port is straight through ...Known Z80 M1 problems?I got an email yesterday from someone asking for a Z80 without the M1 problem. I only know about the fanout problem that many Z80's are suffering of…
... be easier to replace the Z80 CPU.
And it is a ...Known Z80 M1 problems?I got an email yesterday from someone asking for a Z80 without the M1 problem. I only know about the fanout problem that many Z80's are suffering of…
Replaced the Z80 cpu on my TC2068 with the one Ben sent me. It fixed the problem with the Divide. The bad M1 line issue might not be limited to Sinclair machines.
/PedroSpectrum 128 toaster and divide incompatibility problems with some demos and games.Okay so I got this thing now. It?s my first Spectrum ever. [img]http://img836.imageshack.us/img836/2016/speccyl.jpg[/img] [url]http://img824.image…
... />
Maybe spectranet uses the Z80 CPU clock of spectrum then there ... strikes the limits of the Z80 system. Therefore in my eyes ...Spectrum 128 toaster and divide incompatibility problems with some demos and games.Okay so I got this thing now. It?s my first Spectrum ever. [img]http://img836.imageshack.us/img836/2016/speccyl.jpg[/img] [url]http://img824.image…
... ]
Maybe spectranet uses the Z80 CPU clock of spectrum then there ... strikes the limits of the Z80 system. Therefore in my eyes ... Spectranet's CPLD uses the CPU clock... so it rather needs ... 0x00 to 0xFF before the CPU reads, so therefore it's ...
