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PoC for a ULA video generator described using Handel-C and a Basys FPGA board.Recently, I've taken a course about hardware design for video processing using FPGA's. The HDL used in the course was Handel-C, a C look alike langua…
... write a description of the ULA behaviour when generating video (not ... of 14MHz of the original ULA) .
The result is ... : one of them is the ULA video generation FSM, which in ... -
MIA: YS issue 94 / Retro Gamer 9I've just found the CD rom from Retro Gamer 9 containing the virtual 'YS issue 94' covertape. ( [url]http://www.worldofspectrum.org/infoseekid.cgi?id…
... 9 containing the virtual 'YS issue 94' covertape. ( [url]http://www ... -
+3 ULA question.I have a +3 and a DivIDE+ unit. Another user has suggested that the reason the DivIDE+ doesn't work on the +3 is that the ULA may be dud. I have trie…
... the +3 is that the ULA may be dud. I have ... can get a replcaement +3 ULA from? I have been told ... a +3, what about 128K ULA or +2 ... -
Crash no. 98: the final issueFinally, after buying it off Ebay many years ago, I got round to reading Crash issue 98. I never could motivate myself to read the scans, and looking…
... got round to reading Crash issue 98. I never could motivate ... /> These changes started back in issue 56, and I'm just ... -
Question about ZX81 componentAfter I cleaned and replaced some components (7805, two electrolytic caps) with fresh ones, and replaced the RF board with a composite one, on an iss…
... a composite one, on an issue one ZX81 machine I have ... is right next to the ULA the screen was coming back ... ?
Also, is an issue one ZX81 supposed to be ... rare like the ZX issue one? It has a small ... -
FS: My 48kIve decided to sell my personal, everyday 48k rubber key, reason being ive recently took delivery of another but this has nearly everything on the bo…
... ), new membrane and now working ULA in it (as supplied and ... broken joystick and composite modded, Issue 4a. Cant find the serial ... -
48k issue 2 boardsJust picked up a rubber key issue 2, faulty membrane as usual, cracked at the top so trimming not an option (ill be ordering soon Rich!) What strikes…
... picked up a rubber key issue 2, faulty membrane as usual ... -
Issue 2 Speccy faultHi Guys, I'm really hoping someone can help me with a fault that has just developed on my issue 2 speccy. After perservering for some time with usi…
... has just developed on my issue 2 speccy.
After ... -
Crash Issue 1 and full colour Spectrum Games BiblesHaving a big sale, everything 99p starting price... [URL]http://shop.ebay.co.uk/everythingpasses/m.html[/URL] (And yes its my wifes account so she …
... have...
[B]Crash - Issue 1[/B] - Sure to be ... full colour Speccy books, Crash Issue 1 is of course the ... -
Issue 6a black and white problemGot a 6a board, no colour, black and white striped border (when it should be blue or red), and the display visibly judders left and right slightly ev…
... ?
Composite modded, replaced ULA, checked memory, could this be ... -
Speccy 128 Shadow screen.How much is the shadow screen used in 128k commercial software? I ask because I am looking at putting 128k of memory in the 48k setup I have been bu…
... this issue, i need some way of determining if the ULA or ... signals are provided via the ULA, its a pain), Alas, its ... -
Fully integrated ZX+Hi, I just want to show some inspiration for integration HW to ZX+ case ;-) - ZX48 issue 3 board, without all parts regarding video generating (pa…
... + case ;-)
- ZX48 issue 3 board, without all parts ... /> - scandoubler which catch data during ULA VRAM access
- Divide with ... -
ZX spectrum +2 issue3 (gray) videoout problemHi! Have distorted flickering image on ZX spectrum +2 gray issue3. RGB connection thru sony CXA rgb->svideo coder (Good quality! but flickering) [ur…
... flicker distortions, i have hardware issue on this spectrum?
How ... /plus2sch.png[/url]
ULA sync malfunction? -
Wanted: Rubber Key 48K M/board or ULAI have a spectrum that isn't too happy. It seems to be a problem with the ULA... So, has anyone got a spare working motherboard that'll fit in my ca…
... be a problem with the ULA...
So, has anyone got ... in my case, or a ULA for a 3b revision? I ... .
The current ULA has Ferranti ULA 6C001E-6 / 8351 stamped ... -
ZX Spectrum Woes...In my endeavours to get my second Spectrum (Issue 3) working I have replaced the CPU, memory and lower ram. I have fitted sockets for the CPU and me…
... to get my second Spectrum (Issue 3) working I have replaced ... signal provided by the ULA is the 14MHz ULA clock signal divided ... shows pin 32 of the ULA as high and pin 6 ... wave. Pin 39 of the ULA is permanently high, although the ... -
Retro Gamer Issue 88Good issue this month, fair bit of Missile Command. I 'presume' Rainbird Rich is the guy who wrote the article on Firebird this month, looks really …
Good issue this month, fair bit of ... ).
In next months issue theres an interview with Raffaele ... -
Is this the infamous Dead CockroachCan anyone help me. I have an issue two spectrum that I want to list on ebay, but I want to know if this has the dead cockroach ULA fix. I would have…
... help me. I have an issue two spectrum that I want ... this has the dead cockroach ULA fix. I would have presumed ... if the board was an issue 1, but it is an ... issue two and I only thought ... this was present for Issue ones???
Can any ... -
ZX Computing - Dec '84/Jan '85 issue missing from viewerAs the title says, the Dec '84/Jan '85 issue is in the archive but not in the list of issues available to the magazine viewer.
As the title says, the Dec '84/Jan '85 issue is in the archive but not in the list of issues available to the magazine viewer. -
Retro Gamer issue 91 - 'Lost' Spectrum games featureJust a quick heads up that the latest issue of Retro Gamer goes on sale in the UK today and it includes an eight page article on the most famous unre…
... heads up that the latest issue of Retro Gamer goes on ... -
Issue 3V - anyone got one?As the title says really! :) According to [url]http://www.users.globalnet.co.uk/~jg27paw4/yr07/yr07_33.htm[/url] issue 3V motherboards have 64K RAM …
... /~jg27paw4/yr07/yr07_33.htm[/url] issue 3V motherboards have 64K RAM ... actually seen one of these Issue 3V Spectrums with only 8 ... -
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…
... with one from a broken Issue 2 Spectrum (the problem was ... I don't think the ULA had any reason to be ... it just be that the ULA isn't suitable for it ... -
Retro Gamer Issue 92Just arrived through my door over the weekend (Subscribers copy, should be in the shops soon) A lot of good Speccy goodness. Front cover is the sam…
... the mags still going strong. Issue 92, not long to go ... -
Chris Smith's ULA talk - live today (Sat Jul 23) 4pm BSTChris Smith's talk on the Spectrum ULA at Euskal Encounter will be broadcast live today on the Basque country public TV's website! Sorry about the sh…
... 's talk on the Spectrum ULA at Euskal Encounter will be ... , and the second about the ULA and its reverse engineering.
csmith talks about games/ULA book on EITBHere is what looks like a very rough edit, courtesy of EITB (Basque country TV) with Chris Smith about the ULA book and game engines of back in the d…
... ) with Chris Smith about the ULA book and game engines of ...August 2011 issue of Frontlines now onlineThe August 2011 issue of Frontlines is now online - go get your monthly news fix! [url]http://www.ysrnry.co.uk/frontlines/[/url]
The August 2011 issue of Frontlines is now online - go get your monthly news fix!
[url]http://www.ysrnry.co.uk/frontlines/[/url]Which Issue 1 Spectrum model is most desirable - 16K or 48K?Can one of the collectors out there settle a argument between me and my mate? If a 16K and a 48K issue 1 Spectrum, in similar condition, where place…
... a 16K and a 48K issue 1 Spectrum, in similar condition ...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 ...Spectrum + and +3 Bath! Including SEXY photos!Continuing my "bath" projects: Today I repaired a 48K Spectrum + to working condition, an Issue 4 that is nice and stable. Took 4x Spectrums+ apart …
... Spectrum + to working condition, an Issue 4 that is nice and ... ensure longer life of the ULA and Z80.
[IMG ...Retro Gamer issue 94Just received my subscriber copy this morning. Big well done to Nick.H for his interview/article about 'Frontlines' the monthly newsletter/fanzine. …
... Atari/GBA
Decent issue, one step closer to the ...Dead 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…
... 's broken:
Spectrum+ with issue 6A motherboard and nothing on ... hot (all 4) and also ULA. Regulator (7805CV) don't heat ...
