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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 ... CPU itself.[/quote]
If it works straight away after a power on ... okay.
The Z80 CPU actually has a special ... The Z80 may then see an erratic signal on it' ... -
Z80, and 6502, in comparisonI was wondering about how each of these compared in terms of performance. The Commodore 64 had a 6502 @ 1MHz, and graphics processor VIC which took …
... (efficient use of memory) the Z80 wins, but often at the ... compared to running out of registers on the Z80.
But if it ... register to register operations, the Z80 wins.
And ... mapped video RAM that the Z80 CPU can directly access for example ... -
Z80, and 6502, in comparisonI was wondering about how each of these compared in terms of performance. The Commodore 64 had a 6502 @ 1MHz, and graphics processor VIC which took …
... video RAM that the Z80 CPU can directly access for ... lack of ANY 16 bit registers.
The ... code I've written. On the 64 column graphics text ... with the speed setting on an emulator indicates that a ... with a graphics ship on the buss should be ... -
Brain 8I am glad to present my new "experiment" in Sinclair Spectrum 48K BASIC. https://drive.google.com/file/d/17_wCFWaAl5diIVt3rPLTbKhxDmPmYmOs/view?us…
... unfortunately) that Sinclair BASIC on the Spectrum will still allocate ... integer maths directly using the CPU registers where possible, rather than ... this way I guess, depending on the calculations required.
... but fire with a low power like say 20, and the ... -
The Complete List Of The Causes Of Lower Ram Failure?Well the aim is to get a comprehensive list.I ask this because I know very little about it . I know that failure of "power supply" related capacitors…
... of ways to prevent the Z80 CPU from refreshing DRAM. This will ... all memory locations.
On a basic ZX Spectrum, it ... cause any hardware damage. A power down / up will restore the ... -
Why not more interest in C?Just curious. Not trying to provoke anything other than a discussion here. It would seem (to me) that it would be better for "Z80 beginners" to wr…
... ]
Yes on a Z80 i think thats true. but ... tracking will give the biggest power on the wheels.[/quote]
... optimization really wants as many registers (or more precisely register ... code and various other standard Z80 tricks can just accomplish ... -
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…
... 't have time to work on Spectaculator for a while
- Customisable Z80 CPU speed from 3.5MHz to ... -
Broken sound on Spec +2My spectrum +2 (with the +3 system board) just gives off static sound through the UHF out. The audio out is also full of static sound. This is sitti…
... /> This is sitting at the power on menu, and also in Diag ... , and possibly had it solder on the wrong way around.
It has printed on it "KBR 6.0 MC ... -
ZX PC InterfaceZX <-> PC Interface Contents 1) The ZX <-> PC Interface 1.1) What is it? 1.2) What does it do? 2) Installation 2.1) The softwa…
... .
The serverprogram will load .Z80 and .TAP files directly to ... /> PRINT USR 14500;O;"NAME.Z80"
This will activate ... the given .Z80 file, which then can be ... RESET the Spectrum
(or POWER ON/OFF) and enter the following ... -
[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…
... printer. Play games released on Sinclair
Interface II ... /> However, the speech on Treasure Island Dizzy now plays ... /> going out of sync on some soundcard / motherboard combinations. ... br />
o Customisable Z80 CPU speed from 3.5MHz to ... -
Help with dead Spectrum +2aHello. My Spectrum +2a died some time ago. It was powered on, I looked away and next time I looked at it, screen was black. I have replaced the 4 r…
... time ago. It was powered on, I looked away and next ... replaced the 4 ram ICs, Z80 and ROM ICs from a ... is steady black when I power on the machine.
Has ... ? There is much less documentation on fixing +2a/+3s compared to ... -
Old emulators on DOSBOX.Sadly, my Win'98 machine is going loco a bit too often. I've finally decided that I'll have to move everything over to the noisy, underused XP machi…
... of funny video modes, like Z80's VGA text mode (with ... many) VESA modes.
Z80 works fine (-xv). With all ... table: :)
(Z80 V3.02 - LDIR on, all other slowdowns off ... .0%
(Z80 V3.02 - All ON).
8000 = 104 ... -
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 ... objections to place the text on WoS too, it seems it ... -
Z80 Developer ConsoleHi, This is a project I have meaning to do for ages, recently had a kid, had some time off work (as a software developer) and surprisingly had a bit…
... visual studio for a z80... Ive kept tabs on the time so ... I have spent 18 hours on it.
Its written ... -
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…
... introduction to the Sam's Z80 CPU, hexidecimal numbering, memory and ... Diary. There's news on the Sam2GB Gameboy emulator from ...
PayPal
------
Click on the PayPal payment button by ... account holders. Again, click on the PayPal payment button and ... -
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 -
Spin problems/issuesI am running Spin 0.666 and have noticed a few issues (some are bugs, some might be just me). I am using Vista sp1 (yeah I know!), and I've seen Dunn…
... ]
Place breakpoints on the HALT and RET ... and select "run". The Z80 will now freeze at the ... the box in the registers box on the far right), and ... . If you interrupt the Z80 at a random point, ... turboloader blocks. It does work on EightyOne though.
Testing other ZX roms on DivIDE / DivIDE+This is package of different ZX rom images with DivIDE instalator. Each file contain ROM image at adress 49152 + assembler Prometheus with installati…
... BOLD fond type
After power-on is allram mode off.
on DivIDE+ and original old DivIDE ...grrr The Capacitor PlagueI'm getting fed up of The Capacitor Plague. If you don't know what this is, I'll tell you the result. Your computer stops working. Sometimes, it won'…
... working. Sometimes, it won't power on, but most times, it ... anything that loads up the CPU), reboots randomly, or crashes ... bad capacitors. Now, the power supplies on those same machines are ... to bad capacitors on the motherboard - although the power supply was ...Spectrum dead: 8 vertical bars in alternating colorsI have been soldering on this basterd for a long time now. All IC's now have sockets (except the LM1889). I swapped all 4116's by types that are 100%…
... 100% ok. Power is 100% ok. Swapped ULA, Z80 and ROM ... What I get when I power up the system, is 8 ... lines. When I switch on the power on and off a couple ... there anything I can watch on the edge connector? What ... (tried to measure some stuff on ZX'es. but I only ...Repair options for my own dear old Spectrum 48k?Hello all, This is my first post to this wonderful forum, which is part of a truly great website! My name is Arnold, and I live in Utrecht, The Nethe…
... ?ve started to work on an educational project for ... , all it showed at power on was a mosaic of coloured ... the problem would be elsewhere on the board.
... the upper part of the Z80 as well, and the ROM ... question I will ask on this forum on behalf of my ...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…
... "][B]Actually is refresh work on this project.[/B][/COLOR]
Z80 CPU, battery CR2032. PROFI Interface work ...Problem with Spectrum +3 and power onHey, folks! I have here a Spectrum +3 with the following problem: - It has an ATX PSU, adapted and it powers on OK. - When it boots, it shows this …
... PSU, adapted and it powers on OK.
- When it boots ...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…
... Yesod
Dun Darach
Power Drift
Tasword Two
Programming Z80 CPU 2nd Edition (SGS)
Spectrum ...ISO ROM 128 with TR-DOS 5.05(cz)This is new correct version of ISO ROM for ZX + BETADISK. Some extra basic command is designed specially for use in conmination with TR-DOS 5.05(cz).…
... " CODE (load snapshot = memory snap, CPU registers ...)
= (show basic info - ... /> "hallo" (print text "hallo" on screen - PRINT command is ignored ... 10+2 (print value 12 on screen - PRINT command is ignored ...Documentation page: a link needs updatingAt the bottom of the page [url]http://www.worldofspectrum.org/documentation.html[/url] the link to [quote]Z80 CPU Official Support Page, maintained b…
... ]
the link to [quote]Z80 CPU Official Support Page, maintained by ... is now
[url]http://z80.info/[/url]
you first need to click on [quote]An official mirror of ...Picture interference on red areas.I recently got a 48K Speccy off eBay, did a composite mode and it seemed to work OK, but then my TV had to go off for repair so I didn't use it for a…
... the plain white screen at power-on or the black background of ... /> Other systems (PS1, N64, DVD) on the same telly using both ...I hit an electronic jackpot!!!Hi everyone, My computer project can exceed faster than ever!! My school has no electronic or computer teachers so they have thousands of chips and …
... />
I even got two z80 CPU's that i would LOVE ... /> I have loads of buffers, registers and flipflops!!!
All though ... like minimum hardware for the z80 to function?
Thanks
