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New version (v0.31) of ZX DiagnosticsHi all,<br><br>Just wanted to let people know that I've released a new version of the Spectrum Diagnostics into the wild.<br><br>These were originall…
... nice features as a rudimentary ULA test, testcard for tuning VR1 ... -
ZX81 Composite Mod<p>I've done a simple composite mod to my Issue 3 ZX81 following a basic schematic I found on one of the ZX81 forums. Mod consists of a BC547, 1…
... input from Pin16 of the ULA, 5V, ground and a video ... -
Advert quotes quiz III'm back with a new quiz for you, retro-magazine geeks! :-B #1: YOU'RE COOL, THE ENGINE'S HOT, THE GIRL'S GOURGEOUS, A TANK FULL OF GAS AND AN O…
... 'RE COOL, THE ENGINE'S HOT, THE GIRL'S GOURGEOUS, A ... -
This heat ...We've had a couple of near record-breaking days over here, 39 degrees at one point, and I've heard it's almost this hot in some parts of the UK, too.…
... heard it's almost this hot in some parts of the ... .
I mean, people use hot water bottles in winter but ... time when it's as hot as these days.
Spectrum+ refurbished by a noob!Sorry if I'm slightly spamming the forum with threads about my Spectrum+, but this is the last one (for now!) as it is all fixed up and I just wanted…
... . Attached a heatsink to the ULA. [Thanks [url="http://store.retroleum ...TV Pal, odd and even framesI have been researching, but haven't found any real interesting information on this subject, so far. What I mean is, since TV PAL signal is interl…
... frame (odd or even) the ULA is currently pushing out ?"
ULA snow effect, and maybe prevent ... external hardware, matching the addresses ULA is fetching at the end ... />
I have bought the ULA book, but have not started ...Retro Asylum 122: The Amstrad CPC[img]http://retroasylum.com/wp-content/uploads/2015/08/122A.png[/img] Steve Erickson jumps into the hot seat for this episode of Retro Asylum, the…
... /> Steve Erickson jumps into the hot seat for this episode of ...I feel they could have done this.After reading the ZX Spectrum ULA, I learned about how the ULA detects if the Z80 if going to access memory in the next cycle and stops it if the ULA…
... stops it if the ULA also wants to. Thinking ... contended.
Alternatively, the ULA could provide some interface between ... memory, so that the ULA can read whenever it ... CPU's perspective, the ULA is a "write only" ... not write to the ULA too often (that buffer ...Interface 1 repair?Can the Interface 1 be repaired? The problem is that it is not recognised by (several) Spectrums, including ones that it worked on the last time I t…
My experience with a ZX Spectrum clone called Elwro 800 JuniorAfter a long break in using this forum (modellrailroading is my main hobby) I'm back and want to tell something about an interesting ZX Spectrum clon…
... functionality of ZX Spectrum's ULA. Please note, that because engineers ... make an exact copy of ULA and as so, there are ...
