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Kempston joystick detectionIn both [url="http://skoolkit.ca/disassemblies/manic_miner/asm/34252.html#34332"]Manic Miner[/url] and [url="http://skoolkit.ca/disassemblies/jet_set…
... no idea about the ULA/floating bus thing.
Any idea ... -
Preferred setup for a ZX Spectrum 48KHi! I got me a ZX Spectrum 48K for about 1.5 year ago. Feels good to have one, I really like the look of it! Except for the computer itself I have …
... is the full address, data, and control port of the CPU ... , with a few supply voltages and other spectrum specific signals.
and data bus as you'd connect the ... -
Ensure my interrupt handler begins at the same T-stateHi! Is there a way to ensure that an IM 2 interrupt handler starts always at the same T-state (related to the moment the ULA triggers the INT line, w…
... best for any machine with contention, and surprisingly simply to integrate. I ... -
Detecting flash mode inversionsIs is possible to detect with certainty when flashing characters change from normal to inverted and vice-versa?
[QUOTE=Basher;802628]Could you monitor the floating bus to find the point where the flash switches over then count frames from then on?[/QUOTE]
floating bus behaviour is well examined, I don't think ula wil give up this information easily. -
Detecting flash mode inversionsIs is possible to detect with certainty when flashing characters change from normal to inverted and vice-versa?
[QUOTE=Arda;802629]floating bus behaviour is well examined, I ... course the value on the bus is coming from memory to ... -
Uridium possible with more colour??Having seen the MSX version of Uridium mentioned in another thread I wondered if the Spectrum could produce anything similiar, and had a go at a mock…
... sprite movement, weapon fire, and powered-up firing going over ... drawing for a scrolling landscape and still be viable. I ... with overscanning the top and bottom borders to make ... vertically-oriented screen, and exploiting the timing hacks to do hardware ... -
Any Examples of player controlled masked sprite over flip screen tilemapped rooms?Please does anyone kindly have any z80 code examples of a flip screens tile map with a masked character sprite that you can control via keyboard, ie …
... you can't achieve (1) and (2) on your own, ... that up each time and just draw the sprites ... not all that fast and requires careful timing not to flicker. ... line of the screen, and run through your list of ... new list of PUSH instructions and repeat for the next ... -
ZX Spectrum (pre-128K) Edge ConnectorCan anyone point me in the direction to a decent diagram of the ZX Spectrum (pre-128K) Edge Connector. I can't believe I've been searching for nearl…
... to check continuity between CPU and Expansion bus) -
ZX Spectrum+ adviceHey all, I just got a ZX Spectrum+ from eBay and I'm not sure yet what to do with it. I wanted to first take a peek inside, see what issue board it i…
... information at different rates and with different timing information. So to convert ... electronic equipment to do this. And often viewers complained about the ... -
A tally on the number of successful builds of the Harlequin[SIZE=4][COLOR=Green][U][B]A tally on the number of successful builds of the Harlequin.[/B][/U][/COLOR][/SIZE] Please post your successes below :-) …
... Ingo for the rapid reply !! and thanks for a brilliant project ... the resistor arrays R1, R2 and R13 the right way as ... at the board and the bus connector is back and the speaker is ... speaker is in the back and the bus connector is left, then ... -
Minor updateWhilst there is nothing major to announce, be assured that a lot of work is being carried out 'behind the scenes'. We now have 3 developers workin…
... to go alongside their Joomla and Moodle installations. Its got ... easily link together sections, pages and categories. Its actually used ... cpcwiki.eu, worldofdragon.org, and www.c64-wiki.com. Its ... more that shared hosting and PHPMyAdmin kept timing out when I ... -
Why were there no SN76489-based sound interfaces for the Speccy?I’ve been wondering for a while now why there were no SN76489-based sound interfaces for the Spectrum. Does anyone here have an explanation? There…
When you're interfacing to a chip with a microcontroller though you have to do it all by bit banging IO ports anyway. It's not like connecting something up to the address and data bus of a microprocessor so speed is barely relevant at all :) -
1986-2016.I'm early, but I'm tired of 1985. So here's the annual thirty-years after topic about Speccy games.
... leaks. You're a walking and floating robot that must collect dozen ... very limited amount of grenades and a couple of other ... very playable, graphics are nice, and your character is well animated ... . It's quite easy and not very challenging, so, lacking ... -
The 'don't google it' quiz thread.What were the names of the 4 'main' Marx brothers? (bonus points for the lesser known 5th) No cheating now.
[quote="guesser;844276"]Luxton and District[/quote]
We ... .."The Luxton & District Traction Bus Company." , close ZX1 but not ... episodes it changed to "Town and district bus co".
Over ... -
Spectrum +2A floating bus portHi As I discovered in the past, Spectrum +2A (and probably +3) do have floating bus port. But it is not shown on all unused ports, only on some po…
... a solution to add the floating bus port to ffh port.
floating bus port, but doesn't respond ... -
Shadow of the Unicorn loader for +2A / +3hi, i have tried to load SotU with the [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0023000"]RAM loader from Fraser Ross[/url], which is l…
I don't see why contention should be a problem. ... RAM banks at the bottom and one optional one at ... , 3, [b]5[/b] and [b]7[/b] are contended ... is no way of avoiding contention. It doesn't stop ... a 16K Spectrum was all contention, and that could still run games ... -
Shadow of the Unicorn loader for +2A / +3hi, i have tried to load SotU with the [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0023000"]RAM loader from Fraser Ross[/url], which is l…
... which is 100% authentic in contention and not using fast or flash ... due to the rom-area contention - have you actually tested this ... -
Shadow of the Unicorn loader for +2A / +3hi, i have tried to load SotU with the [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0023000"]RAM loader from Fraser Ross[/url], which is l…
... which is 100% authentic in contention and not using fast or flash ... due to the rom-area contention - have you actually tested this ... +3/+2A because the "deadly" and superfuous wait cycles in JR ... -
Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…
... /forums/discussion/51886/spectrum-2a-floating-bus-port#latest]this[/url]? I ... -
Wow, time has gone *FAST*!!!! Indiana Jones related, too.It's just been announced that they're making a new Indiana Jones film, and what caught my attention was that the announcement said that the last film…
... /> or
"Indianan Jones and the temple of Psoriasis."[/quote ... ]
"Indiana Jones and the Thursday Evening Senior's ... />
"Indiana Jones and the Bus Trip To The Casino"
"Indiana Jones and the ... -
ZX Spectrum CartridgesI have been thinking of "cloning" ZX Cartridges for a while (case, board and silicon skirt), to be able to make new releases or replace damaged cartr…
... the Z80 instruction address and data bus pattern, for specific instructions ... , like LD I,A and LD ... constantly outputting I and R values on the bus, so it ... , since both chips (memory and logic) require access exactly to ... -
Jet-Set Willy: The Text Adventure!!! :DSo, having been playing quite a bit of Zork, and Colossal Cave Adventure of late, I thought to myself, why not mix it up with another childhood class…
... puzzles to obtain the objects and/or reach further rooms ... like the Ballroom into 'Ballroom' and 'Balcony above the Ballroom' ... complicated both for the programmer and the player.
... reproduce every little nook and cranny and bit of timing to pass a ... -
Spectrum +2A floating bus portHi As I discovered in the past, Spectrum +2A (and probably +3) do have floating bus port. But it is not shown on all unused ports, only on some po…
... isn't consistent with the floating bus behavior on 48K etc (255 ... -
Open source solutions for new WoS siteAs requested here: http://www.worldofspectrum.org/forums/discussion/comment/875978/#Comment_875978 I've opened this thread to discuss the adoption o…
... to go alongside their Joomla and Moodle installations. Its got ... easily link together sections, pages and categories. Its actually used ... cpcwiki.eu, worldofdragon.org, and www.c64-wiki.com. Its ... more that shared hosting and PHPMyAdmin kept timing out when I ... -
1986-2016.I'm early, but I'm tired of 1985. So here's the annual thirty-years after topic about Speccy games.
... is good enough, and with enough personality and nice touches, to ... have to be attentive and choose the timing of your move. ... The movements are very smooth, and ... a disquieting, dark and lethal creature appears and slowly flies towards ... -
The 90sThe decade is old enough for reminiscing. If I could do it over once more know what I know now I think I'd have spend more time in clubs and festival…
Never went to retford porterhouse :(
Big for the psychobilly scene.
And a bus to worksop went right past where I used to gluesniff, errrm I mean hang out. Drink -
1986-2016.I'm early, but I'm tired of 1985. So here's the annual thirty-years after topic about Speccy games.
... difficult to get into,
and your die very easily. Insisting ... [you can choose a leader, and the other will follow him ... a delicate damsel, an adventurer and a small dog.
You ... by headless zombies, giant scorpions and floating skulls. The use of items ... -
bizarre error on a grey ZX Spectrum+2 - the long search for a small problemHi, I got a ZX Spectrum+2 that worked a bit but crashed while loading or running 128k games. I installed a 128k-test-ROM that told me about RAM fa…
... kind of 'riding' the memory contention to get its timing right. -
****ing Awesome Spectrum Engine (FASE)This is a new engine (sprites, tiles, map) for all ZX Spectrum machines. The engine set ups a runtime enviroment that leave between 24K and 30K byt…
... . If 48K it uses the floating bus to syncronize. If 128K it ... -
****ing Awesome Spectrum Engine (FASE)This is a new engine (sprites, tiles, map) for all ZX Spectrum machines. The engine set ups a runtime enviroment that leave between 24K and 30K byt…
[quote="antoniovillena;895817"]...
... If 48K it uses the floating bus to syncronize. ...
[/quote]
I'm intrigued by this feature in particular, I have to take a look at that readme.html
