-
Dead Spectrum diagnosis and desolderingI have two dead Spectrums - one I'm pretty sure is caused by bad memory, and the other - well, perhaps a bad ROM, perhaps a bad CPU (it gets halfway …
... socketed ICs (except for the ULA in the issue 2 Spectrum ... yet)? I have a variable temperature soldering iron, so I can ... -
When could Speccy have been born?Just a pondering excercise for those that know more about the different types of chips in the Spectrum than I. Whilst browsing the z80 page on wiki …
... than I. Whilst browsing the z80 page on wiki last night ... away to see that the z80 started it`s life in ... about what`s in the ULA, or if the RAM in ... -
in quest for a z80 :DI am trying to find a Z80A in some retail shops here in Greece. I have only located the following CPUs branded as either Z80 without anything else o…
... CPUs branded as
either Z80 without anything else
or ... -
Looking for a Windows based Z80 compilerCan anybody recommend a windows XP based Z80 compiler that lets you export your code as a Z80 snapshot or TZX or TAP file? If not, what is the best …
... recommend a windows XP based Z80 compiler that lets you export ... your code as a Z80 snapshot or TZX or TAP ... ?
I'm learning Z80 machine code using Spectrum Machine ... -
Noob to Z80 needing +3 helpI'm quite new to z80 programming, but i'm attempting to write some kind of windowing system that will run alongside BASIC on my +3 with Kempston mous…
I'm quite new to z80 programming, but i'm attempting ... -
Visual Studio and Z80 projectsHi, Does anyone know if there's been a Z80 language parser add-in for Visual Studio created? I use VS daily (for C#) for a living and I know that t…
... if there's been a Z80 language parser add-in for ... nice to use it for Z80 projects.
I tried ... -
I/O contention model questionHi everyone, Sorry for my poor english. Together with a friend we are working on ZX Spectrum 48k implemented in FPGA. We have found bug in the Spect…
... into ULA_. (because data from Z80 is valid during whole
ULA this can't be right as Z80 probes data ... -
light gunHi all, Im quite new to the spectrum scene. I just bought a spectrum +2 last week with a load of games and a light gun. But I dont know what games …
Hi all, Im quite new to the spectrum scene. I just bought a spectrum +2 last week with a load of games and a light gun. But I dont know what games I can use the gun with, can anybody offer any help? -
Kinda_japanese.z80While trying to organize all my zx folders and temp zx folders I found this: [url]http://zxspectrum.zidev.com/zx/kinda_japanese.z80[/url] The resul…
While trying to organize all my zx folders and temp zx folders I found this:
[url]http://zxspectrum.zidev.com/zx/kinda_japanese.z80[/url]
The result is japanese, kinda... :P
I already tried 'martjin' and 'dunny' :lol: -
New Spectrum emulator for DS[url]http://zxds.raxoft.cz/[/url] [quote]Features already implemented: * Solid Z80 core - possible bugs aside, the Z80 emulation is as complete…
... implemented:
* Solid Z80 core - possible bugs aside, the ... supported, though, not the Z80 snaphsot format. Word of warning ...
* 48k/128k Z80 snapshot support - the Z80 is a popular snapshot ... lines at the times the ULA would read them. It ... -
Spectrum 48k SeettingGot an issue 2 speccy on the bench that had a poorly ula, changed that, also changed tr4 and tr5 (had no oscillator) now it just resets over and over…
... bench that had a poorly ula, changed that, also changed tr4 ... ztx313 thats lies across the z80 and its no different altho ... -
Palmtop BV 1.1 (Windows CE) and Z80 formatHi, I have Palmtop BV 1.1 running on my HandHeld Windows CE device. Problem is, it only seems to handle the Z80 format. I have hundreds of TAP games…
... only seems to handle the Z80 format. I have hundreds of ... good list of games in Z80 format? Many of the ones ... -
Z80 gamesHello, I am looking for the following in Z80 format... The Great Escape (best game ever made!) Run the Gauntlet Microprose Soccer Football Manager …
... looking for the following in Z80 format...
The Great ... -
ULA chipHi. Where i can find a ULA 6C001E-6 chip for an 3B issue Speccy ? Also looking for one 7805 heatsink... Thank
Hi.
Where i can find a ULA 6C001E-6 chip for an 3B issue Speccy ?
Also looking for one 7805 heatsink...
Thank -
TIPP31 transistor questionYesterday I had the time to try and repair a 4S issue 48k spectrum I had. First of all I replaced all the electrolytic capacitors. The tr4 transistor…
... boot. I had tryied the ULA on another machine and it ... it had to be the Z80 or the ROM.
Thank ... god it was the Z80 because I didn't have ... -
Unconventional way of diagnosing a faultHi everyone Some time ago I got a 48k Spectrum (issue 3B board) in a pretty bad condition. I believe the power supply transistor TR4 failed, causing…
... />
I have a small Z80-based computer Galaksija which uses ... . I can't just remove ULA from the circuit because it ... it possible to disable the ULA's video generation functionality (i ... you disconnect the oscillator from ULA?
Also, can someone ... -
UlaI remplaced an ULA 6c001-6 by an ULA 6c001-7 chip on issue 3B board. It is "crucial" to remove R32 and adding the 2x NAND gates ??? or not ? Thanks.
I remplaced an ULA 6c001-6 by an ULA 6c001-7 chip on issue 3B board.
It is "crucial" to remove R32 and adding the 2x NAND gates ??? or not ?
Thanks. -
Tommy GunHi, Got a few suggestions etc. for Tommy Gun. Well done Kiwi et. al. for a fantastic application. I would like to add the following suggestions: …
... few suggestions etc. for Tommy Gun. Well done Kiwi et. al ... -
Disable onboard memoryWould this work...? Access to onboard I/O can be disabled by holding IORQGE high. Would it be possible to create a MEMRQGE in a similar way to disa…
... /> insert resisitor
|
Z80 MEMRQ +----+--/\/\/\/---+------>ULA, top 32K RAM
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 …
... output) or a faulty Ferranti ULA chipset?
Unfortunately ... if there are replacement ULA chips?I know that ... T34VG1-USSR-Made-of-ULA-Chip-for-Z80-CPU-ZX-Spectrum_W0QQitemZ120137893224QQihZ002QQcategoryZ4193QQrdZ1QQssPageNameZWD1VQQcmdZViewItem[/ ...First steps in Z80 machine codeI never got into machine code much back when I had a speccy, as I didn't have any development tools at the time. The only machine code I'd previousl…
... grips to the basics of Z80 machine code.
I ... /sinclair/[/url]
pactest3.z80 is the emulator snapshot and ... the code, I'm a Z80 newbie, and probably haven't ... enjoyed learning the basics of Z80 machine code, seems like loads ...A thought about Top GunI've been playing a bit of Top Gun earlier, and I'm not convinced it should be classed as a vector 3D game, as I'm seeing really nothing that would m…
... playing a bit of Top Gun earlier, and I'm not ... one who thinks that Top Gun should not be classed as ...Fuse for Mac OS X beta releasesA beta version of Fuse for Mac OS X has been released at the dedicated sourceforge project: [url]http://sourceforge.net/projects/fuse-for-macosx/[/u…
... active, as the +2A/+3 ULA applies contention only when MREQ ... the reset line on the Z80) and "hard" resets (pulling the ...Spectrum ULAHi new to forum ,and have been a speccy owner/fan since the begining{like most 30 somthins on this forum !) Anyway what i want to know is the ULA th…
... want to know is the ULA the same from issue 3 ...machine IDs for .z80 snapshotsHi, is there s.o. officially in charge for the .z80 file format? while upgrading zxsp's save_z80 routine i added new machine IDs for the Specci vari…
... . officially in charge for the .z80 file format?
while upgrading ... discuss/introduce them to the z80 format descriptions floating around.
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…
... of visual studio for a z80... Ive kept tabs on the ...Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…
... 128k) cycles after the ULA has pulled the INTREQ low ... 32 cycles and the Z80 can generate interrupt for ... after it happens). The ULA needs to fetch the screen ... on the bus when the ULA reads them, not later, ... a real machine but unfortunately ULA in my beloved 48k ...z80 assembler?HIya, I used to program assember on the trusty c64, but want to have a dabble with z80 on the Zx spectrum, can anyone recomend a good assember, dis…
... to have a dabble with z80 on the Zx spectrum, can ...
