-
ZX Microdrive errorToday I started some ZX Microdrive having in the closet, and only one has given me problems with the typical [B]Microdrive Not present[/B] error. As …
... there is no problem of ULA and the motor starts, I ... -
Amstrad Toast Rack?Hello there my fellow WoS'ers Recently I have been very lucky with my brother giving me a Sinclair Spectrum 128K+ (Toast Rack), it needed a little a…
... servicing, I noticed that the ULA is [B]Amstrad[/B]
ULA, arguably suggesting a closer-tie ... are known to have Amstrad ULA's in some models.
Hi there ;) New development groupHi everybody! I'm Baron Ashler, founder and member of a new very little development group called "Kabuto Factory" and this is my first post ;) We'v…
... an early beta of our WIP) at "Freak en Paro" blog ...Grey+2 displays cyan instad og bright 0 whitehere's a weird one one of my grey+2's displays cyan instead of white, yet bright 1 white is ok I swapped a ULA out of a machine that is ok and it's…
here's a weird one
one of my grey+2's displays cyan instead of white, yet bright 1 white is ok
I swapped a ULA out of a machine that is ok and it's the same
this comes through both rf and scart, any ideas?Shadow ROM partial decoding not implemented in emulatorsOr at least, not implemented in Spectaculator, and it seems that not in Fuse too. [URL="http://www.speccy.org/foro/viewtopic.php?f=8&t=408&start=53"…
... main ROM, not floating bus (ULA/FFh), of a mirror of ...Spectrum+ fault - lines on boot screen, freezesThe ZX Spectrum+ I bought in the car boot has a fault. When you boot it, it's displaying the Copyright screen, but each character position has a vert…
... I don't think the ULA had any reason to be ... it just be that the ULA isn't suitable for it ...ZX Spectrum 48K clone and test resultsHi! This is my first post, so, first of all, I'd like to say hello to the whole community! I am Alessandro Dorigatti from Italy and I'm developing …
... Chris Smith "The ZX Spectrum ULA: how to design a microcomputer ...Spectrum 128k+ Toastrack lower Beeper level?Does anyone know the easiest way of matching the AY and beeper levels? I'm guessing perhaps the easiest thing to do is lower the beeper line rather t…
... beeper comes out of the ULA and maybe drop the level ... the pin outs of the ULA for the 128k+ anywhere? No ... which pin out of the ULA the beeper comes from and ...ZXMMC+ emulation added to Z80p48K emulator for the V6Z80p+Hi friends! As time ago I've posted a thread about an FPGA clone for the V6Z80p board, I'd like to give an update about the status of the project. …
... described in "The ZX Spectrum ULA: how to design a ... 7MHz, 14MHz (experimental). The original ULA contention algorithm is always applied ... (PAL => PAL ULA, NTSC => NTSC ULA)
- VGA 50Hz ... 50Hz => PAL ULA, VGA 60HZ => NTSC ULA)
...try to fix issue 4 board problemHi I try to fix speccy 48. All voltages are in place, ula 100% ok, cutted +5v from ic25 so far no luck. What next? ROM or upper memory? wojtek (i…
... . All voltages are in place, ula 100% ok, cutted +5v from ...ZX Shed OnlineYay! I'm putting the site together now so we will soon be online! I'm adding the content from previous issues at the moment..... I'm after volun…
... .co.uk[/url] - its a WIP at the moment, and not ...Is this pure bulls@*t or what?Read [URL="http://www.ebay.co.uk/itm/SINCLAIR-ZX-SPECTRUM-PLUS-48K-REFURB-COMPOSITE-OUT-/170691876340?pt=UK_VintageComputing_RL&hash=item27be0755f4#h…
... the composite mod damaging the ULA, cant be true surelyDead Spectrum+Hi! Any suggestions where to start finding what's broken: Spectrum+ with issue 6A motherboard and nothing on TV. Top row of the upper memory chips g…
... hot (all 4) and also ULA. Regulator (7805CV) don't heat ...Requesting a little help to identify the purpose of this 'add-on' to my Issue 2Hi everyone First of all it's my first post here so please go easy on me! I'm grateful to be accepted into your fine little club :smile: I probabl…
... to go from under the ULA to under the CPU.
ULA pin 37 (A15)
Pin ... fourth NAND gate) goes to ULA pin 36 (A14)
Pin ... .e.+5V) will stop the ULA responding to I/O requests ...black +2 go awayHi, All what is my problem if i have the proper voltages inside my black Spectrum +2 black (+5v+12v) in all the important IC's , and not have any vi…
... if i put high level ULA go away, but i hope ...Little experiment in ULA+Just tried Image 2 ULAPlus and this is the result: View it: [url]http://jbacteria.antoniovillena.es/48s?scarlett.tap[/url] Download it (you must ex…
Just tried Image 2 ULAPlus and this is the result:
View it:
[url]http://jbacteria.antoniovillena.es/48s?scarlett.tap[/url]
Download it (you must execute in a supported emulator like SpecEmu):
[url]http://jbacteria. ...Definitive Replay Attendance List 2011There's not too long to go until Replay 2011 in Blackpool, so I thought I would make a separate thread to list WOS members who say they're going to t…
... of the definitive ZX Spectrum ULA book, ISBN-13:978-0 ...Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
... />
I have verified the ULA (5C112E-3) works by testing ...
Spectrum and a working ULA from another Spectrum produces the ... back!) It does seem the ULA becomes slightly hotter than usual ... CPU and ROM
and ULA, with the expected 470ohms resistance ...Milk, No SugarA few people were asking about this vertical shooter at Replay, and I'm not sure if TMR found time to load up the WIP demo over the course of the wee…
... time to load up the WIP demo over the course of ...New ZX-ULA2An upgraded / replacement ULA for the Sinclair ZX81 is now available. The ZX-ULA2 is a direct replacement for the standard ULA used in the Sinclair …
An upgraded / replacement ULA for the Sinclair ZX81 is ... direct replacement for the standard ULA used in the Sinclair ZX81 ... home computer.
The ULA is a custom chip designed ...Repairing another Issue 2 48K Spectrum.I said at the start of the other thread that I've got another one of these and I've started investigating it. The board is more-or-less exactly the …
... they were exactly the same. ULA unplugged, I applied power again ...Faulty Interface one, IF1Dear all, as I have already mentioned in a different thread my IF1 stopped working for no special reason. I went through the service manual and chec…
Grey +2 video output and oddities.I've been experimenting with one of the above that I acquired years ago, but had just been buried at the back of a cupboard. I've connected it up to…
... the transistor that pulls the ULA's /IOREQ line high when ... like this or was the ULA bug corrected for the +2 ...divIDE x Spectrum clonesAnyone has a Spectrum clone and did a test with divIDE? Here in Brazil we have 2 Spectrum clones (TK90X and TK95) that are almost 95-99% compatible w…
... know that our ROM and ULA are slightly different of the ...Faulty rubber speccy - advice neededHello all speccy hardware gurus :) Recently I moved to a new flat and after a long time have some space (and time) to dig out my old Speccy hardware…
... lower ram chips... maybe even ULA...
Of course, when ... them, and confirmed that the ULA from the faulty mbo worked ...SCRplusAnn: SCRplus 0.19, with a user-friendly GUI (based on GTK+). Converts images to ZX Spectrum format. Supports ULA+ format, Timex 8x1 attributes, YUV…
... to ZX Spectrum format. Supports ULA+ format, Timex 8x1 attributes, YUV ...Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…
... the basis for understanding the ULA, and all the timing quirks ... of the Spectrum ULA, and the later work Chris ... Smith did to produce the ULA book).
Some pictures ...
