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Spectrum ULA replacement!Hi gang.. The Speccy 48 ULA Replacement is *almost* here ;) There has been lots of activity in building the CPLD board, sorting out some irritating…
... gang..
The Speccy 48 ULA Replacement is *almost* here ;)
Anyway, the machine with ULA replacement doesn't quite boot ... -
ULA Book - Target Audience?This is probably of most intrerest to hardware chaps, but a greater community input would be good. I've been turning all my ULA analysis into a love…
... been turning all my ULA analysis into a lovely ... "The Sinclair ZX Spectrum ULA". I'm doing this ... time as creating a complete ULA replacement, so effort is ... features of the machine the ULA encapsulates.
Do I ... the specifics of the ULA internals, it's going ... -
Wanted: RGB SCART cable for heatsink 128K and ULA for issue 3 ZX SpectrumHi all, I'm after an RGB SCART cable for a heatsink 128K as well as a replacement ULA for an issue 3 ZX Spectrum (Ferranti ULA from memory). Can an…
... as well as a replacement ULA for an issue 3 ZX ... Spectrum (Ferranti ULA from memory). Can anyone help ... -
ULA Replacement WORKS !Hi chaps. Lots of activity over the last couple of weeks, and _finally_ we have [B]a working ULA replacement[/B] !! The analogue components such …
... we have [B]a working ULA replacement[/B] !!
The ... -
One's speccy is unwell, can anybody help?Hi chaps! This would be my first post here, so hello to all :smile: I've got a 128+ heatsink speccy that seems to have a display issue whereby after…
... do with the ula getting a bit too hot or maybe some ... -
Timing... in the CSS faqI was looking at the CSS faq for something completely unrelated and noticed: [quote] Then the 192 screen+border lines are displayed, followed by 56 …
... slightly as the Spectrum gets hot; the reason for this is ... placing a cooler onto the ULA has been observed to remove ... vary slightly with temperature. The ULA dissipating heat into the PCB ... period of time. Preventing the ULA from getting as warm as ... -
Inside the ULAI've recently updated my Blog with the news that I've managed to get inside a 6C001E ULA and have got close up images of the die. I'm currently back-…
... to get inside a 6C001E ULA and have got close up ... -
Spectrum ULA Book AnnouncementFurther to getting inside the ULA, I've turned my ramblings and lab book into a more professional book that you can all own! I'm putting a lot of ef…
Further to getting inside the ULA, I've turned my ramblings ... -
ZX81 ULA 2C210E wantedHello, I'm in need of a working 2C210E (not the earlier 2C184E) ULA chip used on zx81s and Timex1000s. These were sold on ebay for 9 quid each some …
... 2C210E (not the earlier 2C184E) ULA chip used on zx81s and ... -
128k heat sink - ULA problems and a hintHello, I had two ZX Spectrum 128k with a similar behaviour. One item worked only a short time after switching on and then there were increasing RAM …
... perfectly if I cooled the ULA (with cooling spray). The first ... measuring the signals of the ULA I found out that the ... the RAS pin of the ULA. Finally I placed a 180pF ... ) even if I heated the ULA with a hair dryer.
R.I.P. spectrum 48kRecently one of my 48k rubber key (issue 4) machine bit the dust the other day when I tried to power it on. When powering it on, it gave a weird 'bee…
... ?arch r$...
The ULA gets very hot.
This 48k ... back (maybe 3) with new ULA ferranti #7, all new electrolytic ... some custom fit heatsinks for ULA, Z80, etc...
I seem ...issue 2 board c34 getting hotHi All, Can anyone help with c34 getting hot very quickly? I`ve got an issue 2 board, there is no `buzz` from coil. yet the spectrum initalises to co…
... anyone help with c34 getting hot very quickly? I`ve got ...MicroDrive ULA replacement - best way?I have a mirodrive playing up, odd motor sound, sometimes it reads ok sometimes not. Just wondering if its worth replacing the ULA in it, and whats …
... if its worth replacing the ULA in it, and whats the ... a look. I have a ULA chip about the place.
ULA Schematics CompleteHi all. Just a note to say that I have finally produced some readable schematics for the 48K ULA :-) I've also uploaded a few pages from the book -…
... readable schematics for the 48K ULA :-)
I've also ...Games that remind you of long hot summers of oldSo, we're coming up to the Summer Bank Holiday, and it isn't exactly warm outside. I'm currently typing this in my back garden which is in shade all …
... remind you of the long hot summers we had in the ...Where: ZX Printer ULA's and ZX interface I ULA'sIs there any source left for these ULA's? Alot of tings can be replaced, like the ZTX transistors and occasionally you can come accross a normal ZX S…
Is there any source left for these ULA's? Alot of tings can be replaced, like the ZTX transistors and occasionally you can come accross a normal ZX Spectrum ULA, but I have never seen these anywhere?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…
... a working Spectrum). The ULA gets quite hot in the middle, the ... ROM (AMI 8427ACJ) gets very hot. All other chips run cold ...ULA Hacks?During some of my madder experiments back in the 80's I discovered some interesting ULA hacks such as being able to read the raster position through …
... 's I discovered some interesting ULA hacks such as being able ... because I knew that the ULA kept changing and I would ...Hot Rod (missing artist)[URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0002361"]Hot Rod[/URL] DF or PF in the lower right (I think I've seen this one before but can…
... .org/infoseekid.cgi?id=0002361"]Hot Rod[/URL]
DF ...Can ULA kill other componentsIn my search for a problem I used a ULA6C001E-7 on a board that had a ULA6C00IE-6 chip. Q1) Should this have worked? Q2) After this experiment both …
ULA Plus and Interlace.May be a bit late to suggest this, but here goes. Did the original Speccy ULA actually output a proper PAL interlaced image, with timing pulses on a…
... />
Did the original Speccy ULA actually output a proper PAL ... frame?
Now, does ULA Plus generate a proper interlaced ...ULA Price Poll - You get to chooseIt is difficult to set the price of the book. If it is too low I will undersell my efforts, too high and I overcharge. So choose what you would be w…
... content not only documents the ULA circuit, but also full details ... of the Ferranti ULA range, images of the 6C001 ... ULA internals, both optical and scanning ... technology that was the Ferranti ULA, or the principles and techniques ...ULA equivalent?Gives it an ULA equivalent for the ZX 48K? Or not because the ULA is a custom chip. Micky
Gives it an ULA equivalent for the ZX 48K? Or not because the ULA is a custom chip.
MickySomeone can help me to fix my Zx Spectrum?I did a video about the startup: [url]http://dl.dropbox.com/u/1566495/ZXSPECTRUM03.mp4[/url] I have replaced the ULA with a working one (same proble…
... />
I have replaced the ULA with a working one (same ... )
None RAM modules are hot.
I know that it ...Earliest ULA datecode ??I'm on a mission to find the earliest ULA datecode. Ie, when the first batch of ULA's were manufactured. The earliest picture of the Spectrum circu…
... mission to find the earliest ULA datecode. Ie, when the first ... batch of ULA's were manufactured.
ULA - and Sinclair may have in ... />
The earliest issue 1 ULA datecode I have is 8217 ...ZX 48K issue 4a with ULA 5?I got a ZX 48K PCB. It works but it has a ULA 5. I thought on the issue 4a is a ULA 6 or later. Micky
I got a ZX 48K PCB. It works but it has a ULA 5. I thought on the issue 4a is a ULA 6 or later.
Micky+2A extended memory map & ULA bug?The [URL="http://www.worldofspectrum.org/faq/reference/128kreference.htm"]128K reference page[/URL] says: [quote]The ULA bug which causes snow when I…
... [/URL] says:
[quote]The ULA bug which causes snow when ... .[/quote]
Will the ULA bug appear on the Spectrum ...ULA BookI've just had an email stating that my ULA book is "in the post" - yay! Well done Mr Smith for all the hard work on this.
I've just had an email stating that my ULA book is "in the post" - yay! Well done Mr Smith for all the hard work on this.ula bookula book is here: [url]http://www.zxdesign.info/book/[/url] can i post sam coupe stuff here - she kind of is a speccy if you stuff the speccy rom i…
ula book is here:
[ ... you
was readinfg the ula book and this is not ... described as ula snow - the description of that ... which is what i thought ula snow was whereas that is ...Help with broken SpectrumHi There, Just received a ZX Spectrum computer. It's an issue 3B (48k version). When I power it up (9V centre pin -V) nothing happens. It's complete…
... 5V).
The ULA gets a bit hot. Other IC's stay ...
