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The ULA and ScreenI've asked something similar before but please bear with me. I'm trying to understand the way the screen is controlled. The ULA controls output to …
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[quote]
The 128 was not developed in Spain ... natural extension to the ULA that can be done ... much hassle. The original ULA fetches two bytes per memory ... that without changing the ULA core much at all ... video from the existing ULA would come up with ... -
The ULA and ScreenI've asked something similar before but please bear with me. I'm trying to understand the way the screen is controlled. The ULA controls output to …
... natural extension to the ULA that can be done ... much hassle. The original ULA fetches two bytes per memory ... that without changing the ULA core much at all ... video from the existing ULA would come up with ... a missed opportunity for the 128...
So ... -
Faulty 128Need some help here. I've got a 128+ that won't boot to the menu. It just displays a load of rubbish on the screen. Here's an example of what it does…
You could enter that picture for next years turner prize. With the 25000 quid you could buy a load of 128+'s
Seriously though it looks like bad ram or a fried ula to me. -
Sound mod for AY audio chipsHi again. This is a repost. I posted it in the misc forum a while back but it definitely should be in here. I was totally pissed off with the crap…
No idead about that, I would guess the 128 & 2 ULA is different from the 48k, though the pinouts might be the same. -
Sound mod for AY audio chipsHi again. This is a repost. I posted it in the misc forum a while back but it definitely should be in here. I was totally pissed off with the crap…
... has a different ULA, this is only for the 128 and above ... -
128k Screen Flipping - Sample Code PleaseI know this has been covered before, but I cannot find out code to do the following: On a 128k Spectrum tell the speccy to display from address 4915…
... port.
On the 128 and +2, memory is entirely ... processor shares them with the ULA. This reduces the speed of ... typical bank switch on the 128 is:
LD A,(5B5Ch ... -
ZXCF InterfaceI'm just trying to get an idea for the ZXCF interface, and to me, it looks a much cleaner design compared to divIDE (Of course, that's just my opinio…
... (Timex screen modes in the 128's shadow screen area)?[/QUOTE ... screens". You can tell the "ULA" to generate the TV picture ... -
ZXCF InterfaceI'm just trying to get an idea for the ZXCF interface, and to me, it looks a much cleaner design compared to divIDE (Of course, that's just my opinio…
... b2 b1 xx - Page where ULA fetches
video data from ... terribly difficult to accommodate both 128 and Timex paging -- if it ... 's a 128 register that was written to ... from the page number for 128 banks of 16k (or 8k ... -
Egghead 4 available to downloadFollowing his adventure in space, Egghead is today Entertaining a guest. Yes, Shelley is coming to tea and it's up to Egghead to get the food on the…
... - and probably original 128 (when loaded in 128 mode with music) you ... get the before mentioned ULA Snow ... fine with music on other 128 spectrums (+2A/+3/Pentagon/etc ... is the +2A with normal 128 ROM in both sockets :)
new spectrumI have notices all sorts of advances on the C64 sceene such as 20mhz cpus, gui`s, and IDE interfaces. are they any kind of advances in development fo…
... options), 27K visable by the ULA instead of the usual 6 ... port, AY sound chip (on 128 and Timex ports).[/quote]
NTSC for Speccy? What would happen?Hi doods. I was just reading a bit there about the TEA2000 video encoder. I'm just talking theory here. What would happen if you... Cut pins 12 an…
... =aowen]... However I believe the ULA in the original Spectrum 48 ... help to 128 owners).[/QUOTE]
Hardly. 48K ULA performs PAL ...+3 soundhello there, just a quick-fire question today. i'm kinda keen on the idea of using my +3 quite a bit, particularly if i bother to to actually sort …
... />
I would leave the ULA connection for the moment. Its ... 28 is for the Speccy 128 (please let me know if ... one of the docs). The ULA connection on the +3 is ...The New SPIN releases ThreadOk, as I'm now working on SPIN again full-time, and as a very wise man once said, "Release Early, Release Often"[1]... I'm going to release new SPIN…
... Model, and it then says 128 is 48k+ in the status ... . This is regardless of whether ULA snow effect is enabled or ...The New SPIN releases ThreadOk, as I'm now working on SPIN again full-time, and as a very wise man once said, "Release Early, Release Often"[1]... I'm going to release new SPIN…
... Model, and it then says 128 is 48k+ in the status ... . This is regardless of whether ULA snow effect is enabled or ...Questions from the new owner of a grey Spectrum +2I managed to pick up a grey Spectrum +2 off of ebay with cheap shipping (I'm in the US... it was $13 total and it has a Donkey Kong tape inside) and …
... grey +2 is basically a 128 with a cassette deck (and ... bank switching that the newer ULA provides.
Is there ... or you can fry the ULA.[/QUOTE]
Yeah, I read ...Questions from the new owner of a grey Spectrum +2I managed to pick up a grey Spectrum +2 off of ebay with cheap shipping (I'm in the US... it was $13 total and it has a Donkey Kong tape inside) and …
... bank switching that the newer ULA provides.[/QUOTE]
Jarek ... snag is that on the 128/+2, the +3 paging port ...You know how the 128K was faster than the 48K Spectrum?Regarding how the Spectrum 128K ran at 3.54 MHz rather than the 48K's 3.5MHz, was this difference enough to be an advantage? If not, then surely Sinc…
... /> Did not know the 128 divide ULA's clock down five times ...128k dead, no TV signalI got 128k spectrum (heatsink model) from a friend of mine. He told me that speccy is dead, and he doesn't know what's wrong with it. When I plugged…
Only place for a spare ULA is another broken Spectrum.
< ... /> It is unlikely that the ULA is killing the video so ... chip is used inside the 128 - it is in the +2 ... 're gonna be sending that 128 to either Spirantho or me ...The 128 plus 2 wasn't very goodHaving looked at the review in issue 33 of Crash of the Spectrum Plus 2, it strikes me as a bit odd, as if Simon Goodwin had to like it. I remember r…
... a major redesign of the ULA and without some extra CPU ... new graphics... since the Timex ULA with the extra graphics was ... time to do a new ULA. There's no way they ... /> Given the difference between the 128 and +2 board I'd ...The 128 plus 2 wasn't very goodHaving looked at the review in issue 33 of Crash of the Spectrum Plus 2, it strikes me as a bit odd, as if Simon Goodwin had to like it. I remember r…
... br />
[quote]
The 128 should have included a microdrive ... done anything with since the 128 presented an opportunity to ... have done for the first 128 model:
* Video ... trivial modifications to the existing ULA.
* Two atari ...The 128 plus 2 wasn't very goodHaving looked at the review in issue 33 of Crash of the Spectrum Plus 2, it strikes me as a bit odd, as if Simon Goodwin had to like it. I remember r…
... done anything with since the 128 presented an opportunity to ... have done for the first 128 model:
* Video ... trivial modifications to the existing ULA.
[/quote]
We ... including the interface with the 128 would have established the drive ...The 128 plus 2 wasn't very goodHaving looked at the review in issue 33 of Crash of the Spectrum Plus 2, it strikes me as a bit odd, as if Simon Goodwin had to like it. I remember r…
... of blitter chip to the 128 / +2 and still keep the ... a major rework of the ULA (or would it)? Another option ... been good for the initial 128, as we know Amstrad wouldn ... would have happened to the 128 if it did have these ...The 128 plus 2 wasn't very goodHaving looked at the review in issue 33 of Crash of the Spectrum Plus 2, it strikes me as a bit odd, as if Simon Goodwin had to like it. I remember r…
... of blitter chip to the 128 / +2 and still keep the ... a major rework of the ULA (or would it)?[/quote]
128, as we know Amstrad wouldn ... would have happened to the 128 if it did have these ...The 128 plus 2 wasn't very goodHaving looked at the review in issue 33 of Crash of the Spectrum Plus 2, it strikes me as a bit odd, as if Simon Goodwin had to like it. I remember r…
... meant a redesign of the ULA from scratch so it ... twice as many cycles during ULA memory access.
... the features of the 128 as they were and ... real upgrade appearing in the 128 would have injected some ... wasn't much a 128 game could offer besides ...The 128 plus 2 wasn't very goodHaving looked at the review in issue 33 of Crash of the Spectrum Plus 2, it strikes me as a bit odd, as if Simon Goodwin had to like it. I remember r…
... d do for the first 128. The blitter means an ... twice as many cycles during ULA memory access.[/quote]
... since it requires a faster ULA, RAM and CPU. ... upgrade appearing in the 128 would have injected some ... wasn't much a 128 game could offer besides ...The 128 plus 2 wasn't very goodHaving looked at the review in issue 33 of Crash of the Spectrum Plus 2, it strikes me as a bit odd, as if Simon Goodwin had to like it. I remember r…
... since it requires a faster ULA, RAM and CPU. Contention ... silicon generation where a newer ULA with twice density and speed ... from the 48 to the 128 may have accelerated sales, spurred ... 128-specific software development, and may ...Spectrum Composite video connections?Is it possible to modify a standard 48K spectrum to give composite video output? In my experience i have found the quality of the picture out of the…
Those fade vertical bars are normal. All my spectrums have them.
Also normal is the slightly moved to the left paper (a known ULA issue, modeulator has nothing to do with it , later fixed on the 128 models).Blowtorch method of Speccy repairsI just did my first Spectrum repair (and successful at that). It was the Issue 2 spectrum I wrote about a while ago, I just hadn't got around to doin…
... performs tests on keyboard, sound, ULA, RAM chips, and ROM mostly ... on a multiface (one or 128 ) so you can test Z80 ... ) and when i pressed multiface 128's red button it would ...Keyboard Problem?Hey all. I'm Dave I'm in my last year of college before I go to University. I'm in the UK. I got a +2 a while back when I first told my mum and dad…
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Membranes for the Spectrum+/128 at a realistic price ?10 ...
Z80 processors ?3
ULA chips for the 48K ?5 ... same way as the Spectrum 128, only using switches instead of ...128k dead, no TV signalI got 128k spectrum (heatsink model) from a friend of mine. He told me that speccy is dead, and he doesn't know what's wrong with it. When I plugged…
This thread is old now, but tell you what, I didn't notice you saying the ULA was an Amstrad chip, the machine being a Sinclair built 128. This isn't right!
