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Using a Z80 CPU in a 48K Spectrum?Will a Z80 CPU (which I have) work well enough in a 48K Spectrum to give me an indication as to whether the Z80A CPU in there is duff? Thanks for re…
Will a Z80 CPU (which I have) work well enough in a 48K Spectrum to give me an indication as to whether the Z80A CPU in there is duff?
Thanks for reading - weathereye. -
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…
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.
Micky -
Overclock the Z80 cpu to smooth out gameplay?Was thinking today of a Genesis/Megadrive mod I did a while back. It involved lifting the CLK leg on the motorola 68000 cpu (which in the MD, if I r…
... leg on the motorola 68000 cpu (which in the MD, if ... believe was handled by a Z80 cpu).
Well, I was ... + or +3e) by lifting the Z80's CLK pin and adding ... -
External Z80 CPUHi Looking for some advice if possible. Many years ago I had a plug-in board for a Spectrum 48k which had a couple of switches, a z80 CPU, and a S…
... a couple of switches, a z80 CPU, and a Spectrum ROM on ... the external ROM and/or CPU instead of the on-board ... can't recall how the Z80 was switched. The ROM seems ... really having problems with the CPU. Can anyone advice if such ... -
Of course, when the M1 line of the Z80 CPU is failing, the Z80 CPU must be replaced![quote]Of course, when the M1 line of the Z80 CPU is failing, the Z80 CPU must be replaced![/quote] Err, why? If you are trying to use an interfa…
... M1 line of the Z80 CPU is failing, the Z80 CPU must be replaced ... or expansion that needs a Z80 MPU with a working /M1 ... -
Z80 disassembler C/C++ source codeHello, I just thought I might share the [URL="http://zxds.raxoft.cz/docs/z80d.cpp"]source code[/URL] of the Z80 disassembler I have written for [URL…
... /docs/z80d.cpp"]source code[/URL] of the Z80 disassembler I have ... way of understanding how the Z80 CPU breaks the opcode sequences into ... case was to provide the source code of the disassembler routine ... -
Z80 Emulator Source?Found a link to this on comp.sys.amstrad.8bit. i havent been with the discussion long but supposedly this is the source for a Z80 emulator. Forgive m…
... supposedly this is the source for a Z80 emulator. Forgive my ignorance ... know if it's a Z80 emulator for Spectrum or what ... -
Z80 CPUs goin cheap.This guy is selling them very cheaply and has a couple multi item auctions for them. Thought I would post here in case people were looking for one/so…
... ]http://cgi.ebay.co.uk/Z80-CPU-BRAND-NEW-FOR-SINCLAIR-SPECTRUM ... -
ANN: SpecEmu 2.5Oh well, can't say I'm particularly proud of this, but I am bored with it :p So.... New features: * Currah µSpeech emulation (with various pla…
... µSource emulation
* Support for Interface 2 ROMs
* Support for Z80 CPU ... -
Full throttle CPUHello, I was just wondering: do you experts know if any of the 48K games pushes the Z80 CPU to 100%? I mean, every CPU cycle is used? If so, what's t…
Hello,
I was just wondering: do you experts know if any of the 48K games pushes the Z80 CPU to 100%? I mean, every CPU cycle is used?
If so, what's the game/application?
B/R,
Lovespider -
Z80 Expander Bus ControllHello there my fellow forum chummies, I would like to ask a few technical questions, Now I come from an Amiga Hardware based background, and as yo…
... /> any links to some decent Z80 expansion port schematics?
Z80 inteface expander[/b]
[ ... for direct install on the Z80 cpu
Will this interfere ... with the Z80 expansion Bus
[/list]
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…
... ://www.ebay.com/itm/Zilog-Z80-CPU-Z0840004PSC-New-Sinclair-ZX81-Spectrum ...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…
... /misc/z80test-1.0.zip"]Z80 tester package[/URL] I have ...128K Toastrack - bad Z80?My 128K Toastrack works fine, but if I try to use divIDE or M1/128 it does not work. divIDE does not show the boot screen and in both if I push the N…
My 128K Toastrack works fine, but if I try to use divIDE or M1/128 it does not work.
divIDE does not show the boot screen and in both if I push the NMI button, the Spectrum resets.
Is a bad Z80 CPU?
My soldering skills are so bad. :(ESXDOS 0.8.5 and .Z80 on +2B or +3Last week I received some .Z80 snapshot files from a DivMMC EnJOY! user to test. These files didn't work on his ZX Spectrum +2B. [URL="http://benophe…
Last week I received some .Z80 snapshot files from a DivMMC ... [/URL] containing four of these .Z80 files.
[U ... from the shelves and the .Z80 files didn't work.
Z80 CPU was a cause of loading ...Z80 Special ResetThe Z80 CPU has two types of reset, normal and special. The latter is little-known and for more information please see [url]http://www.primrosebank.n…
The Z80 CPU has two types of reset, ... ]http://www.primrosebank.net/computers/z80/z80_special_reset.htm[/url]
Question about Z80 and RD/WRI know almost nothing about the Z80 CPU but I am learning. I know this is WoS so I hope asking generic Z80 related questions are OK. Anyway, I wa…
... almost nothing about the Z80 CPU but I am learning. ... I hope asking generic Z80 related questions are OK.< ... Say I have a Z80 connected to a microcontroller and ... br />
Does the Z80 OR those two pins so ... 't imagine that the CPU would incorrectly try to ...Mastering flagsI'm little lost when different flags are set/reset after logic operations, and what conditions must be met. For example, [code] ld a, MODE…
... />
Is "Z80 CPU User’s Manual" must read source, or can somebody ...Retromania: 40 years of the Z80 game coding contestAs usual, Retroacción is holding a coding contest for Retromañía (held in November), with cash prizes! This year we're celebrating the Z80 CPU's 40th…
... year we're celebrating the Z80 CPU's 40th birthday with a ... Z80 game coding contest. *Any* Z80 based system will ... -en-ensamblador-para-el-zilog-z80Help understanding the Z80.So I have a Z80 CPU and a 32k ram chip. I understand how they connect. (Data and address busses, chip select etc.) But how would i input information…
So I have a Z80 CPU and a 32k ram chip. ... into ram or into the CPU directly through the data bus ... I need to use the CPU/ ram.
Yes. I know ... . And the books about the z80 kinda droan on and difficult ...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…
... />
You can download the source code, as well as compiled ... debugging:
* new enhanced debug cpu menu: view TV electron position ... a breakpoint is fired on cpu-step-mode, the breakpoint ... menu
Fixed bug on Z80 cpu core, iff2 was not being ...create z80I want to Create z80 code and run it on an emulator for the 48k spectrum. I want it soo easy to use its a dream. I dont like dos based stuff.. Can a…
... to the line in the source etc..
BASin - with ... final z80 code - I've had a look at the BASin source ... some sort of breakpoint on z80 instructions and a step / register ... my own simple little debugger / z80 cpu emulator (not a spectrum emulator ...Where do I begin to build an emulatorHi I would like to build a Spectrum emulator from scratch, the reason? well I'm curious, to see if I can =) I've successfully ported Pocketclive to X…
... also find there some source for a z80 cpu core, although personally I ... with the main part - the CPU core. It's the bit ...Help make Retro Gamer greatI'm more than happy with the articles that are now appearing in Retro Gamer, but I want it to become far more of a hub for the retro community than i…
... designing and building a Z80 based single board computer ... double sided PCB with a Z80 CPU, Z80 peripheral chips (PIO and SIO ... available under a Free open source license (GPL or Artistic), ... brand new (the 'classic' Z80 was manufactured about six months ...C# emulatorHi, I wanted to branch out and get a little better with C# so I think I need something meaty to do to keep me going....so an emulator seemed a reaso…
... and find a C/C++ Z80 CPU core and port it. C ... instead of doing a boring CPU.
I did this ... if you can find source to a z80 core, the speccy emulation ... ...I'd find free source to a Z80 core - theres loads out ...The Programmers Development System (PDS)Hi everybody, I recall this system has been mentioned several times on WoS forums. Last time was, I think, when those sources from Maz Spork (Buggy …
... a faster version of the Z80 CPU used in the Spectrum just ... />
; > D1.L = Source...
; > D2.L = Destination ...
move.w #dma_source_lower,d0 ; Source...
move.b d1,d0 ... /> move.w #dma_length_lower,d0 ; Source...
move.b d3,d0 ...divide deviceHi, This is first my first post,so hello to you all I first Spectrum 48k was a Xmas present way back in 1983,best gift ever. Then I moved on to a C…
... adapter, and no extra power source is required. It comes with ... connector or faulty M1 on Z80 CPU.
Unfortunately it seesm to ...Learning Assembly LanguageHow easy would it be to learn assembly language for someone who has a decent grasp of Basic? I mean how long do you think it would take before I coul…
... 7 instead.
My Z80/8080 reference book and the ... to be parsed in the source code. SNASM takes exception with ... a comma after the instruction. Z80 CPU has a maximum of 2 ...RAND USR that doesn't work in emulators and clonesEons ago, I "discovered" a strange RANDOMIZE USR. This is it: [b]RANDOMIZE USR 46578[/b] Using it on a genuine ZX Spectrum rubber key or Plus model,…
... .
[B]Zilog Z0840008PSC. Z80 CPU, 8MHz[/B]
Cold ... />
[B]Zilog Z0840020PEC. CMOS Z80 CPU, 20MHz[/B]
Cold ... (hopefully fixed) I've used (source code + ROM file)[/url]
48k to 128k upgrade - problemsHi friends! I built 128k upgrade according to the [url]http://hw.speccy.cz/128krebuild.html[/url]. After I powered on my Speccy it said hello with s…
I have found, that my Z80 CPU was source of my problems with some ... . After replacing it with old Z80 NEC clone instead of Zilog ...
