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Broken SpectrumsChaps ( & Mrs Death ), I was looking at getting some dynamic ram chips for the next phase of the Harlequin stuff, and I started thinking...... I've…
... />
I've got the ULA off one of them and ... -
Multiface +3The other Multiface topic has reminded me about this... I may still have this lying about somewhere (although +3 i had at the time is long dead and …
... long dead and gone from ULA failure)
I remember ... -
Ports AccelerationOn ZX48 or 128/+2(grey) is contended and uncontended ports. For example: if you will read 512 bytes sector from IDE device to ZX ram via INI or INIR,…
... will contended (slow down by ULA). ULA stop CPU if adress bus ... -
ZX Spectrum and (real) B A S I CSometimes ago there was a thread "how spectrum changed your lives". Another thread dealt with "how to copy spectrum screens using basic not using co…
... to understand (maybe beside the ULA) and everyone who dealt with ... -
Who has an Issue 1 or Issue 2 Spectrum??Do you have an Issue 1 or 2 Spectrum (ie machines with 5C102E and 5C112E ULA's) ??? I'm doing a lot of research into the ULA and also the reasoning …
... machines with 5C102E and 5C112E ULA's) ???
I'm ... lot of research into the ULA and also the reasoning behind ... free book "The ZX Spectrum ULA".
One of the ... the RAS line of the ULA _ever_ go high impedance - this ... -
Who has an Issue 1 or Issue 2 Spectrum??Do you have an Issue 1 or 2 Spectrum (ie machines with 5C102E and 5C112E ULA's) ??? You're help is needed! PLEASE SEE THIS THREAD: [url]http://www.…
... machines with 5C102E and 5C112E ULA's) ???
You're ... -
128 I/O portsIn The Spectrum Hardware Manual there is a small circuit on page 71/72 to allow 128 I/O ports by using IORQ+A7 to override IORQGE, so any I/O access …
... with A7=0 prevents the ULA from responding, so freeing ... high, ie, if the ULA is not being selected with ... high to doubly ensure the ULA is not selected. A ... working ULA responds when A0=0, ... and IORQGE=0. A faulty ULA responds when IORQGE=0, ignoring ... -
The direct bus or indirect one... that is the questionThe Ethernet project continues...and I'm in a quandry. So I've managed to implement enough socket library for the W5100 that socket, bind, listen, a…
... loaded a bit by the ULA, which so I believe consists ... -
Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... timing. An explanation how the ULA replacement fetches the bytes without ... -
Faulty +2 Grey :(Hello everyone... i was trying to fix a +2 grey board the other day, i had it for some time now. It gave a black screen (paper and border) with two …
... known working rom, z80 and ULA on it and made no ... -
Where shall I start to look ?I got hold of a faulty 48k, Issue 6. It displays a picture like shown below: [URL]http://www.gjelberg.no/miscpics/speccyfault.jpg[/URL] Some of the…
... also tried to swap the ULA with a known working one ... -
Faulty Spectrum (help requested)I have an issue 6a specci. It's Z80 has the fault m1 line problem (Multiface 128 does not work). So I decided to put in a new Z80 but unfortunately i…
... were made with a working ULA and Z80 from another Spectrum ... -
Fuse for Mac OS X 0.9.0 ReleasedA new version of Fuse for Mac OS X has been released at the dedicated sourceforge project and shortly here on WoS: [url]http://sourceforge.net/proje…
... active, as the +2A/+3 ULA applies contention only when MREQ ... -
No colourHi! I'm trying to fix a 6A 48K machine that outputs no colour and shows the characters as if they were in bold. So far, I've done a couple of thing…
... of things:
Changed ula with a known working one ... -
SENDING beeper music from Z80 to AY?Hello. According to [url]http://z80.e-demo.pl/[/url] Z80 sends music-data to ULA (the 1-bit transducer). I was wondering if it's possible to send…
... ] Z80 sends music-data to ULA (the 1-bit transducer).
ULA).
At first, to make ... -
list of ZX games with raining effect(ula snow)If you know any ZX games with raining effect in screen, then add game name to list. I know about this games only: (tested on real ZX128+2 - grey) 4x…
If you know any ZX games with raining effect in screen, then add game name to list.
I know about this games only: (tested on real ZX128+2 - grey)
4x4 puzzle
at4open
black raven
breditor
death valley
gambit< ... -
Trying to add a play lead to my +2(grey)I know this has been discussed at length and rediscussed again but I'm still not sure how to do it! I just want to add a line in so that I can turbo …
... one of these fries my ULA if I get it wrong ... -
Socket to me..Specchums ! I'm laying out the PCB for the ULA replacement, and I need to know how common it is for the following IC's to be socketed (all to the ri…
... out the PCB for the ULA replacement, and I need to ... to the right of the ULA):
Issue 2 - IC25 ... /> Capacitor C28 next to the ULA might pose a problem, so ... -
A good site with Z80 ZX Spectrum 48K tunesI found this good site; [url]http://z80.e-demo.pl/[/url] ; I listened to a few tunes yet, and I am [B]AMAZED![/B][B]To me it sounds WAY BETTER THAN A…
... second dedicated Z80 chip and ULA for beeper and so enable ... there were two Z80 and ULA chips that would provide stereo ... -
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…
... anything to do with the ula getting a bit too hot ... -
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 …
... 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 ... -
A video interface for the Spectrum, MSX compatibleSo you can use the same code for displaying sprites, tiles, characteres, and so no, on both the Spectrum and the MSX. That is, the Spectrum now has a…
... -screen" feature: the well known ULA video output, and a TMS9929 ... -
Another badly behaved RAM upgradeI have a 48K issue 4A board (yellow it is) that was a 48K machine from new, but only reports 16K working with the Sinclair ZX Test ROM in an Int2. H…
... swapped in a known good ULA chip just coz its an ... -
Suggestions for Mr. Rich MellorRich, is there a chance any of these things could be available from you in a near future? -AY interface for 16K/48K Spectrums -PS/2 keyboard interfa…
... fix on +3, memory replacement, ula replacement, hardware fix to add ... -
Sinclair Spectrum ULA BookAnnounced in the Hardware forum, but might be interesting to others: [url]http://www.worldofspectrum.org/forums/showthread.php?p=324213[/url] Regar…
Announced in the Hardware forum, but might be interesting to others:
[url]http://www.worldofspectrum.org/forums/showthread.php?p=324213[/url]
Regards
Chris -
Cro S2008Hi everybody!!! I hope this is right thread? :-) I want to share with you my new project. I call it ?S2008?? The idea was to build Spectrum48K clo…
... good staff already built in? ULA, Z80, LM1889 must stay in ... -
IN 255 behaviour not emulated in Spectaculator and ZXSpinI'm not speaking about "normal" IN 255 behaviour. All of you know what I'm taking about: IN 255 can be used to "read" screen data as it's retrieved f…
... from memory by the ULA to draw the screen. ... to detect when the ULA has finished generating the ... contended memory, and the ULA stops the Z80 clock until ... Z80 resumes operation, the ULA has been released the ... the mentioned range, AND the ULA is accessed (A0 = ... -
Dead microdrive advice plsHi, I recently got a box of bits off ebay, and one of the items is a dead microdrive. Now assuming the motor inside it works (I havnt tried putting…
... -solder incase I fry the ULA) what are the likely causes ... -
Help with faulty +2ahi everyone I'm Nuno from Portugal I think I made poopoo with a 128k +2a motherboard I had spare for testing purposes This motherboard has always …
... to 48k I think the ULA is working no?
the ... ula on amstrads is that square ... -
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…
... Res?arch r$...
The ULA gets very hot.
ULA ferranti #7, all new electrolytic ... some custom fit heatsinks for ULA, Z80, etc...
I seem ...
