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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 ...Light gun emulation status?Hi there, The 1989 chapter is going to mention the Sinclair Magnum and Cheetah Defender light guns, and I'd like to get some decent footage of a cou…
... PC hardware) emulate either light gun accurately at this time?Damn, I think I need a reflow ovenOr a reflow frying pan at least... I was just assembling an order through Farnell since I've worn out another soldering iron tip (which has actually…
... than the CP2200 for the Z80 to read, without a microcontroller ... the B&Q heat gun might come to the rescue ...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 ...ZX Spectrum and (real) B A S I CSometimes ago there was a thread "how spectrum changed your lives". Another thread dealt with "how to copy spectrum screens using basic not using co…
... to understand (maybe beside the ULA) and everyone who dealt with ... advantage of these good old Z80 computers like ZX Spectrum.
What was a Z80 computer capable of ?I have always wondered, and maybe the techy people on here could answer, with what you know about the Z80 processor, was the spectrum hampered by the…
... what you know about the Z80 processor, was the spectrum hampered ... so, what graphics could a Z80 be capable of ? it always ...How does the Z80 communicate with hardware?How does the Spectrum (or Z80) interact with other hardware devices? I think devices can communicate with the CPU through interrupts, but how can the…
How does the Spectrum (or Z80) interact with other hardware devices? ...128 I/O portsIn The Spectrum Hardware Manual there is a small circuit on page 71/72 to allow 128 I/O ports by using IORQ+A7 to override IORQGE, so any I/O access …
... with A7=0 prevents the ULA from responding, so freeing ... a transistor soldered across the Z80. I notice from the ... high, ie, if the ULA is not being selected ... high to doubly ensure the ULA is not selected. A ... IORQGE=0. A faulty ULA responds when IORQGE=0, ignoring ...James Bond Action Pack supported the Light GunHowdy folks, excellent idea to list games that supported the various light guns, I wish similar lists were made on other sites for the Master System…
... Action Pack supported the Sinclair gun - they were bundled together in ...Faulty +2 Grey :(Hello everyone... i was trying to fix a +2 grey board the other day, i had it for some time now. It gave a black screen (paper and border) with two …
... tried known working rom, z80 and ULA on it and made no ...Serching for ZX printer ULA and ZX interface I ULAIs there anyone having any spares. In both cases, I swapped ULA's from working equipment which fixed things, so I'm 100% sure it's the ULA that is ca…
Is there anyone having any spares. In both cases, I swapped ULA's from working equipment which fixed things, so I'm 100% sure it's the ULA that is causing the problem.
Is there anyone who can help?A light gun game from 1936!I found this mentioned on an Nintendo 64 forum! Wow.... [URL]http://www.marvin3m.com/arcade/rayolit.htm[/URL] A light gun game before World War…
... [/URL]
A light gun game before World War 2 ... .
But a light gun game in 1936...Z80 ParserAs you can see from my signature I'm doing a new Z80 assembler partly as a coding exercise and partly as there's some extra features I need. I'm hal…
... I'm doing a new Z80 assembler partly as a coding ...Snow Joke z80 doesn't work?The z80 file for Snow Joke keeps giving an error message when you try to take the first object in the game: [url]http://www.worldofspectrum.org/info…
The z80 file for Snow Joke keeps giving an error message when you try to take the first object in the game:
[url]http://www.worldofspectrum.org/infoseekid.cgi?id=0006990[/url]
The tzx file works fine though.Lerm Z80 ToolkitJust a note that the version on WoS is version 2 of the Z80 Toolkit. I have version 1, but the tape snapped while TZXing. It might be worth noting i…
Just a note that the version on WoS is version 2 of the Z80 Toolkit. I have version 1, but the tape snapped while TZXing.
It might be worth noting in case another copy turns up.Z80 from a ZX81 in a Spectrum?Can I put a Z80 from a ZX81 into a Spectrum 48K? It should work even if they both are clocked differently (3.25MHz vs. 3.5MHz AFAIK), right? Thanks,…
Can I put a Z80 from a ZX81 into a Spectrum 48K? It should work even if they both are clocked differently (3.25MHz vs. 3.5MHz AFAIK), right?
Thanks,
ThomasSource of Z80 ProcessorsHi all, After seeing the somewhat inflated prices that +2A's and +3's seem to be going for on eBay I'm wondering if trying to fix my 48k+ is a bette…
Faulty Spectrum (help requested)I have an issue 6a specci. It's Z80 has the fault m1 line problem (Multiface 128 does not work). So I decided to put in a new Z80 but unfortunately i…
... 6a specci. It's Z80 has the fault m1 line ... put in a new Z80 but unfortunately it was ... a socket and put the Z80 in again. Unfortunately the ... made with a working ULA and Z80 from another Spectrum (issue ... worked before I unsoldered the Z80 perfectly. It also seems ...Dangerous Z80 Assembly CommandHave been reading Toni Bakers' "Mastering MC On Ya Speccy" book and came across the list of Z80 commands in the dictionary section. Page 102 "[b]IM…
... came across the list of Z80 commands in the dictionary section ...Fuse for Mac OS X 0.9.0 ReleasedA new version of Fuse for Mac OS X has been released at the dedicated sourceforge project and shortly here on WoS: [url]http://sourceforge.net/proje…
... active, as the +2A/+3 ULA applies contention only when MREQ ... the reset line on the Z80) and "hard" resets (pulling the ... Interface I state information to z80 and szx snapshots (Fredrick Meunier ...
