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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 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 ... -
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 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…
... "]source code[/URL] of the Z80 disassembler I have written for ... way of understanding how the Z80 CPU breaks the opcode sequences into ...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 ...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 ...Dead Speccy???I have a 48k+ speccy that boots up with rubbish! is it the z80 cpu? it still has the white boarder but the rest is a mess. any help would be nice..…
I have a 48k+ speccy that boots up with rubbish! is it the z80 cpu?
it still has the white boarder but the rest is a mess.
any help would be nice...
thanks in advance [img]/__forums/images/smiles/icon_smile.gif[/img]ANN: Spectaculator 3.0 beta 1It looks like I won't have time to work on Spectaculator for a while as it seems I've become a Dad - whahooo! :) What I'd though I'd do is release t…
... 48k spectrum
- Customisable Z80 CPU speed from 3.5MHz to ...My own Home Computer It's true. My company are planning to build a new Home Computer. It will use a Z80 CPU running at 6mhz, 128k Ram and will run all Spectrum and ZX81 …
... Computer. It will use a Z80 CPU running at 6mhz, 128k Ram ... tell me how to make Z80 computer boards as I no ...[NEW]: Spectaculator 4.0Hi everyone, Finally managed to finish it... enjoy! --- [NEW]: Spectaculator 4.0 Spectaculator is a Sinclair ZX Spectrum emulator for PCs runnin…
...
o Import raw Z80 machine code (produced via TASM ... has been added to save Z80 snapshots uncompressed.
...
o Extensions to the z80 file format to support 16k ... .
o Customisable Z80 CPU speed from 3.5MHz to ...NEW INTERFACE FOR ZX SPECTRUM!!Hi all zx-maniax! Here is a letter from Polish inventor, Yarek Adamski. He constructed a new brilliant interface for ZX SPECTRUM. Ready carrefuly i…
... range of computers based on Z80 CPU - e.g. ZX
Spectrum ... with computers
of other CPU (6502, 68000), but this is ...Spectrum 128k+ for saleHi, I have an excellent condition Spectrum 128k+ (heatsink type) that has been totally reconditioned. -New capacitors, AY sound chip, Z80 cpu, membra…
... /> -New capacitors, AY sound chip, Z80 cpu, membrane, etc...
works great ...MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …
... a misterious internal register in Z80 CPU (MEMPTR) which value is set ... or changed by some Z80 instructions and 2 bits of ... was not exactly known which Z80 instructions initialize the MEMPTR and ...SPIN RZX playbackNot sure if anyone has mentioned this, but has anyone else noticed that when you play an RZX file back in SPIN at a hiked up Z80 CPU speed level, tha…
... SPIN at a hiked up Z80 CPU speed level, that unless you ...ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …
... -Made-of-ULA-Chip-for-Z80-CPU-ZX-Spectrum_W0QQitemZ120137893224QQihZ002QQcategoryZ4193QQrdZ1QQssPageNameZWD1VQQcmdZViewItem[/url]
Sam Revival issue 19 out now! [Sam CoupIssue 19 of Sam Revival is now out! Let's start off with what's on the coverdisk: Conquest. Written by Peter King in 1997 this originally had a lim…
... this issue is "Programming the Z80", a new machine code column ... introduction to the Sam's Z80 CPU, hexidecimal numbering, memory and a ... a gentle plunge into learning Z80 assembly and you'll soon ... most up to date 65C02 cpu emulator code and other enhancements ...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…
... 2 ROMs
* Support for Z80 CPU speeds upto 50MHz
* Snow ...New interface for ZXThis is my old (2004) unfinished project of internal interface for ZX Spectrum 128+2: ([url]http://velesoft.speccy.cz/hardware_in_development.htm[/u…
... , 1MB SRAM, 512kB FLASH EPROM, Z80 CPU, battery CR2032. PROFI Interface work ...More stuff..Ok, another visit to my loft and I've found some more Speccy stuff! Huzzah! Here's the list and the pics: Finders Keepers The Zacaron Mystery Fairl…
... joystick interface
Programming Z80 CPU 2nd Edition (SGS)
Spectrum ...
