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Microdrive Serial ProtocolGentlemen, I've been dreaming for a long time to develop a Microdrive emulator, where an SD card loaded with .MDR cartridge images can be accessed t…
... 2.13, explains that the clock is on the edge of ... is sent/received from/to ULA in 16 Z80 T-states ... has its own 8 MHz clock, and during these 16 Z80 ... elapse. I suppose that IF1 ULA has a way to synchronize ... -
Spectrum FPGA clone with HDMI video output by Jozsef LaszloThis clone is based upon the ULA core I wrote for opencores.org . It features a scandoubler and HDMI conversion engine. Jozsef has found that a 28MHz…
... clone is based upon the ULA core I wrote for opencores ... found that a 28MHz pixel clock HDMI output is accepted by ... -
DivMMC clock bufferI have completed the first DivMMC EnJOY today: [url]http://www.worldofspectrum.org/forums/showthread.php?t=44238[/url] But there is a problem with t…
... is a problem with the clock boost circuit.
Mario ... -
ANN: Tipshop updated Wednesday, 31 July 2013Wednesday 31 July 2013 I've been VERY busy for the last couple of months (in Real Life), so I missed creating last month's update. So here's 2 months…
... , 3D, Chessmaster 2000, The,
Clock Chess '89, Colossus Chess 4 ... , Last Duel,
Madness Schach, Master Chess, Masterchess, Mega Meghan,
800+ Spectrum 128k & 48k original titles still availableHi guys, The original thread was a bit messy and has vanished from the front page, so rather than bump it, here it is again a bit tidier: All origi…
... Toohpaste Tubes
Castle Master
Catterpillar
... /> Cricket Captain
Cricket Master
Crime Busters
...
Gregory Loses His Clock
Grid Iron
Master Chess
Master Chess
Master Mariner
Master of Magic ...ZX Spectrum 48k - no CLK signalHello I'm trying to repair ZX Spectrum 48 mainboard issue 3B. When i check signal with oscilloscope on X1 or on ULA pin 39. I get stable 2V no clock…
... get stable 2V no clock pulses. Can broken ULA chip be the ... cause of no clock signal?
ULA snow effectIt's wintertime, you know. [quote="http://ramsoft.bbk.org.omegahg.com/floatingbus.html"]when the I register falls in the range 0x40-0x7F then the UL…
... 0x40-0x7F then the ULA gets confused by the ... memory address generated by the ULA (who wants to read ... two addresses. Therefore the ULA reads the data from an ... is actually read by the ULA is the following:
ULA is busy drawing the border ...Refactoring the ULAplus HDL descriptionFor the ZXUnio project, I'm refactoring the Verilog code I wrote two years ago to describe the ULA and the ULAplus devices. When I've taken this code…
... years ago to describe the ULA and the ULAplus devices. When ... /> - I can use the 7MHz clock for everything. Prior versions used ... modules were in the original ULA (light yellow), what modules ... br />
This is the ULA/Timex/ULAplus datapath schematic (click ...48k+ ULA'sI've got three ULA's here that only work in certain boards. Thought I was going nuts, swapping, changing stuff around. But hey, I've got two working …
I've got three ULA's here that only work in certain boards. Thought I was going nuts, swapping, changing stuff around. But hey, I've got two working 48k pluses now. :)
Anyone else come across this?New test for finding missing +2A/+3 ULA timing detailsHello, having added the +2A/+3 emulation recently, I want to make sure I got the ULA timing 100% right. We know when the contention pattern starts, …
... make sure I got the ULA timing 100% right. We know ... reliable information about when the ULA actually fetches the screen bytes ...ULA pinsHi I am trying to figure out where on the ULA , among other things, the VYU pins are. I have been reading schematics , but I am really lost when I …
... figure out where on the ULA , among other things, the VYU ... good description of how the ULA reads from video ram from ...ULA 6C001EX-7Last night I visited a friend of mine and had a look at the ULAs in his Spectrums. He has a 5C102E 8220 in a 16K issue one, a 5C112E 8237 in a 16K is…
... issue one (definitely a replacement ULA, there was evidence of where ... />
He also had a ULA I had never seen before ...5C series NTSC ULA 5C114E 8248Not sure if this has been mentioned before; I haven't seen anything about it online. Chris Smith's book discusses 6C011E as the NTSC ULA sold in Spec…
... discusses 6C011E as the NTSC ULA sold in Spectrums in Chile ... Issue 3 style 6C series ULA.
Here we have ... much earlier 5C series NTSC ULA, in a Spectrum with a ... time the 5C112E-2 PAL ULA was being made.
Which ULA to fit in which issue SpectrumI spent a little while studying the resistor changes on page 30 of the ZX Spectrum 48K service manual. They all concern aspects of the video circuit …
... problems to have the correct ULA for that board.
ULA. 220R for 5C112E, 1K for ... 6C001E. The older ULA seems to be designed for ...Wanted Spectrum ULAI'm looking for a working replacement ULA for my Issue 3B Spectrum. Revision 6C001E-6 or 6C001E-7. Thanks!
I'm looking for a working replacement ULA for my Issue 3B Spectrum. Revision 6C001E-6 or 6C001E-7.
Thanks!master system 2while there's a few old game threads around...who used to have one of these? the only gaming system that I have anywhere near as much nostalgia for …
... />
(never saw an original master system. not even sure if ...ULA 6C001E-7After doing an audit of my Spectrum PCBs, I find I have one too many 6000 series ULAs and one too few 5000 series ULAs. Would anyone like a 6C001E-7 …
... anyone like a 6C001E-7 ULA in exchange for a 5000 ... series ULA, either 5C112E, 5C112E-2 or ...Wanted: ULA 5C112E, 5C112E-2 or 5C112E-3After doing an audit of my Spectrum PCBs, I find I have one too many 6000 series ULAs and one too few 5000 series ULAs. Does anyone have a 5000 serie…
... anyone have a 5000 series ULA, either 5C112E, 5C112E-2 or ...48k Spectrum ULA issue?Hi All, Have a couple of Spectrums Plus' with their orignal ULAs showing the failure as in screen 2 on the left. [URL="http://hardware.speccy.org/i…
... confirm this is probably the ULA? I get the same error ... in other Spectrums using the ULA's so I'm virtually ...ZX Spectrum Clock Signal Restorer Circuit[SIZE=5][U][B]ZX Spectrum Clock Signal Restorer Circuit[/B][/U][/SIZE] The circuit below is an experimental circuit. It has only been "tested" using…
... =5][U][B]ZX Spectrum Clock Signal Restorer Circuit[/B][/U ...Toastrack ULA QuestionDid any of the toastracks have the +128 grey ula with Amstrad printed on them?
Did any of the toastracks have the +128 grey ula with Amstrad printed on them?Less MIA - Spectrum Mail MasterIs Mail Master by S&B Software still missing. The tape looks to have Text Master on the other side - although it is hard to tell if that if the labe…
Is Mail Master by S&B Software ... tape looks to have Text Master on the other side - although ...IF1 Ula Questionim thinking about getting an interface 1 but im aware that there is/was an issue with the ula.My question is if i have the opportunity to buy one but…
... /was an issue with the ula.My question is if i ... or a deformity above the ula does this mean i need ... they still functional but the ula gets hot?can someone explain ...ULA type and datecode listHere is a list of all known ULA datecodes with type, collated from various threads and the serial numbers list. For the 6C series ULAs without a -5, …
... a list of all known ULA datecodes with type, collated from ... probably a replacement ULA.
[CODE]DATE ULA ISSUE(s)
ZX81 ULA questionRecently, I got a nice bundle of kit comprising of a ZX81, Memotech keyboard, PSU and brand new 16K Sinclair Memory pack. The ZX81 has a ULA with no…
... />
The ZX81 has a ULA with no ID other than ... /> Unfortunately all chips except the ULA are socketed.48k Spectrum ULA 6C001E-6 ChipAs title says, for sale: ULA 6C001E-6 Chip PM if interested.
As title says, for sale: ULA 6C001E-6 Chip
PM if interested.ULA queryDoes it matter which version ULA fits in a version of the spectrum motherboard, or are they are compatible with each other?
Does it matter which version ULA fits in a version of the spectrum motherboard, or are they are compatible with each other?Weird symptom number 2...I got a new keyboard membrane for my Spectrum+ plugged it in and low and behold the weird left to right printing of the copyright message disappeared…
... tests passed, keyboard, RAM, ROM, ULA, IRQ etc.
After ... occur they must need a clock?
Any thoughts anyone ...XPECCY (Lin/Win)im not author of this emulator. Contacts of author you may take on [URL]http://xpeccy.info[/URL] - non official home page. cpu: Z80: all (un)docume…
... (AlCo16c);
Hardware multicolor;
ULA+;
no screen;
filter ... mode
IDE:
master/slave;
Nemo, Nemo(A8 ...Issue 3 ULA ProblemsI've been given an Issue 3 48k to fix. It was producing no video and no picture on the TV. The coil was buzzing so it was getting power and all the v…
... problem might be with the ULA.
Sure enough, ... it with a spare ULA from an Issue 4( ... I decided to swap the ULA again for one out of ... .
If the ULA is only partially working, and ... the wrong tree with the ULA because when dropping the ...
