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Timex contended memory timings, the TS2068 kludge board and EXROM at $4000 - $7FFFI haven't seen this documented anywhere yet so I thought I'd share my findings. I've been investigating contended memory timings on the Timex Sinclai…
... ; contention is applied whether the CPU is accessing contended video memory ... is used to put the Z80 multiplexed address bus and data ... for the EXROM. Otherwise the CPU would read or write to ... -
48K: Half of copyright message in the middle of the screen?!Issue two. Has 74LS08 over the Z80, but the ULA is 5C112E-3 (I think this should be a 5C102E??? - I have one, but I'm not sure if it is working, at l…
... .
Has 74LS08 over the Z80, but the ULA is 5C112E ... possible without (a) working ULA, CPU, ROM and lower memory.
New version Emulator ZEsarUX-1.0Hi I have uploaded a new version of my Spectrum/ZX80/ZX81 emulator. This is a major stable version, with real timing for all the models and with hi-…
... -res modes)
Speeded up Z80 core using 16 bit operations ...
Added option to view CPU & ULA registers
Added ...New version emulator ZEsarUX-1.1Hi I have uploaded a new version of my ZX80/81/Spectrum emulator on [url]http://sourceforge.net/projects/zesarux/[/url] Changes are: Added suppo…
... />
Added support for loading .z80 snapshots with unsupported machines like ... ZX80/81
Improved view cpu registers option with opcode dissassemble ...z80 commands timeshi! I need site with z80 commands mashine times. I remember, I saw one as table, maybe in .cc domain, but pity forgot link. for example LDI take 16 …
... !
I need site with z80 commands mashine times. I remember ...My attempt to restore the CPU clock signalI know Winston has already got this, but I can't see any thread with details about it. Only wanted to share my (still early) results. I'm not taking…
... Breakout.
Having a CPU in-phase clock signal is ... the internal ULA and the CPU, without relying on the Y ... . The output is the restored CPU signal clock, with the same ... phase as seen by the CPU itsef, i.e, it's ...llvm-z80 statusFew months ago I read about efforts to produce llvm back-end for the Z80 (even perhaps as part of new z88dk). Any update on that? I found [URL="htt…
... llvm back-end for the Z80 (even perhaps as part of ... ="https://github.com/earl1k/llvm-z80"]this but I have no ...Creating a linked list in Z80[FONT=Calibri][SIZE=3]I am using a circular buffer to store tiles to be displayed on the screen. Tiles only appear for a set period of time, so when …
... gone down this route in Z80 or can anyone provide some ...Screen buffer Tip from Raff CeccoRaff very kindly gave me this tip: "Incidentally, I remembered a trick I used on the Z80 for extra speed: When clearing the screen buffer, it was a…
... trick I used on the Z80 for extra speed:
CPU stack to the end of ...z80 reverse engineeringI came across Ken Shirriff's blog today where he is reverse engineering the Z80 from images of a Z80 die. I guess this may be of interest to those of…
... reverse engineering the Z80 from images of a Z80 die. I guess ...FuzixOS - New Z80 OS[url]https://plus.google.com/+AlanCoxLinux/posts/a2jAP7Pz1gj[/url] Alan Cox releases a new Unixoid OS for Z80 machines... Coming to Spectrum soon, I …
[url]https://plus.google.com/+AlanCoxLinux/posts/a2jAP7Pz1gj[/url]
Alan Cox releases a new Unixoid OS for Z80 machines... Coming to Spectrum soon, I hope?Tinkering with DMASo, some afternoon tinkering... [img]http://photo.alioth.net/tmp/dma_small.jpg[/img] The purpose of this all is to see what's possible using the Xi…
... RAM, instead of the CPU requesting bytes via IN instructions ... memory timings as the Z80 chip itself for memory ... fill.
On the Z80, the fastest way is using ... transfers
On the Z80, LDI takes 16 T-states ... br /> A DMA using Z80 memory timings would take 6 ...XPECCY (Lin/Win)im not author of this emulator. Contacts of author you may take on [URL]http://xpeccy.info[/URL] - non official home page. cpu: Z80: all (un)docume…
... page.
cpu:
Z80: all (un)documented commands and ... flags;
CPU freq. ... 2);
General sound 512K (Z80 emulation)
... files:
reading:
SNA, Z80, SPG, RZX;
TAP, ...Blockly for Z80As a first step on a project of mine, I'm trying to adapt [url=https://developers.google.com/blockly/]Google's Blockly[/url] to generate Z80 assembly…
... 's Blockly[/url] to generate Z80 assembly code.
[url ... ://www.haroldo-ok.com/blockly-z80/blockly-z80/index.html]I already ... ://github.com/haroldo-ok/blockly-z80]GitHub[/url].
Of ... to generate code for other Z80 machines... ;)Return to basic from sna created by Z80 compilerHow can I go back to basic when running sna created using Z80 Assembler ([url] http://www.worldofspectrum.org/utilities.html#crossass [/url])? For e…
... when running sna created using Z80 Assembler ([url] http://www.worldofspectrum ...ZX Spectrum+ DivMMC EnJOY! Grundig 16" LCD TV and books.The Spectrum is in very good condition. Composite video mod. New mambrane (bought in November 2014 from rwap_software [url]http://www.sellmyretro.co…
... />
- Replaced Z80 with supplied CPU and socket. Suspect existing ... CPU has faulty M1 output.< ... CPU /M1 output not present.
- Fitted supplied socket and new Z80 ... produced.
- Confirmed CPU /M1 output is functioning.
Help for beginner with z80Hi chaps, I'm reasonably new with z80, but had a fair amount of experience with 68000, so decided to give a few things a go. One little thing I'm t…
... /> I'm reasonably new with z80, but had a fair amount ...Falling Blocks - new game from z80 assembly beginner<p>I started learning z80 assembly earlier this year, mostly from reading Jonathan Cauldwell's "How to write ZX Spectrum Games" and from reading arti…
I started learning z80 assembly earlier this year, mostly ...Ziloghino - Arduino like Z80 systemHi, I found this board on Kickstarter, the Ziloghuino. It's an Arduino like Z80 system extensible with hardware shields. With some effort maybe s…
... . It's an Arduino like Z80 system extensible with hardware shields ...I feel they could have done this.After reading the ZX Spectrum ULA, I learned about how the ULA detects if the Z80 if going to access memory in the next cycle and stops it if the ULA…
... the ULA detects if the Z80 if going to access ... />
So either the CPU and the ULA have to ... provide some interface between the CPU and the memory, so ... sits between. From the CPU's perspective, the ULA ... only" memory chip. The CPU can now run as quickly ...DEFFNder: a small library of BASIC functions written in Z80I've published a small library of 15 Sinclair BASIC functions written in Z80. I wrote it last year for a project of mine. Some of them are generic, s…
... Sinclair BASIC functions written in Z80. I wrote it last year ...z80 assembly helpEver since I was a child I wanted to program my zx81 then my zx spectrum + 2. However, it was such a mystical beast and I only ever used BASIC not kn…
... started reading numerous books around z80 assembly. It's slow going ... in the dark arts of z80 assembly!1-Bit Sound AccuracyI'm hoping someone can give this snapshot a try on a real machine (just press enter to start the music): https://drive.google.com/file/d/0B6XhJJ33xp…
... work on any z80 machine and to allow the cpu to run ...Concert txt files to Z80 or TAP filesHi everyone :) Can you suggest me a software to convert txt files to Z80 or TAP? (OS Windows 7 64 bit) Thanks
Hi everyone :)
Can you suggest me a software to convert txt files to Z80 or TAP? (OS Windows 7 64 bit)
ThanksA few hardware questions regarding Z80 and eZ80Hi Guys, Maybe some of you could help me with these questions: I would like to know what is the actual file size limit that can be used by z80 …
... that can be used by z80 (including bank switching), If there ... the video output resolution of z80 and ez80?
E ... .g. or even higher using z80 or ez80 and what would ... rate of that machine for Z80 and eZ80 (50Mhz model)?An email list about the Forth programming language on Sinclair (and Z80) computersAn email list has just been created to discuss the Forth programming language on Sinclair computers (and Z80 in general): [url=http://programandal…
... language on Sinclair computers (and Z80 in general):
[url ... .html]Forth on Sinclair (and Z80) computers[/url]
There ...7mhz CPU?One of the things I like about Spectaculator, is that I can zap the clock speed of the emulated CPU up. Doing so makes me wonder about why the desig…
... clock speed of the emulated CPU up. Doing so makes me ...Bizarre ZX Spectrum faults (also possibly relevant to Spectranet compatibility problems).I'm attempting to repair an issue 4A 48K ZX Spectrum and am encountering some very strange problems. For my own records I've given this computer the …
... Ethernet interface, I discovered the Z80 had a non-functioning / ... it with a new CMOS Z80 and confirmed its /M1 ... before when using a modern Z80 and so I didn' ... Spectranet, I changed the CPU for an old NMOS one ... other than when a CMOS Z80 is fitted.
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