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Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…
... on 128k) cycles after the ULA has pulled the INTREQ low ... cycle after it happens). The ULA needs to fetch the screen ... on the bus when the ULA reads them, not later, especially ... a real machine but unfortunately ULA in my beloved 48k died ... -
20k+ for a Halo costume anyone?[url]http://cgi.ebay.com/Halo-3-Spartan-Master-Chief-Armor-Costume-Helmet-Suit_W0QQitemZ170148309645QQihZ007QQcategoryZ60361QQssPageNameZWDVWQQrdZ1QQ…
... .ebay.com/Halo-3-Spartan-Master-Chief-Armor-Costume-Helmet-Suit_W0QQitemZ170148309645QQihZ007QQcategoryZ60361QQssPageNameZWDVWQQrdZ1QQcmdZViewItem ... -
I want to build a new, super spectrum ;-)only kidding Andrew :-) my brain's going at a mile a minute at the moment, so I thought I should put some of the ideas down in case one of them is w…
... away from obsolete parts, the ULA is the obvious problem.
ULA and ram I presume..). what ... -
Wanted - 8701 IcHi, I've got one C64 (Yes, i know this maybe not the right place to ask... ;-) ) from EBAY. It works but have no color in display. I search and i fi…
... i find that the 8701 clock IC is not outputing the ... -
Any '81 buffs?Does anybody know the running clock frequency of a Z80A in a ZX81? I've measured the clock signal on pin 6 and got 6.47MHz, and I'm sure it's not ju…
Does anybody know the running clock frequency of a Z80A in a ZX81?
I've measured the clock signal on pin 6 and got 6.47MHz, and I'm sure it's not just a harmonic. Now that's just silly - isn't it? -
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…
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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 ... -
plug me into a segano karingal, this isn't about saga. what are recomended good games for master system, game gear and mega drive. i did have a master system and game…
... are recomended good games for master system, game gear and mega ... />
i did have a master system and game gear but ... -
Mb02+ideAs I wrote in the hardware forum there will be a small number of a redesigned MB02+IDE (nearly the original MB02+ including IDE interface also for CF…
...
4. RTC (real time clock) included
5. 512 kB ... -
Lots of original release Speccy/C64 gamesLOADS of Spectrum (and C64) games are going on EBAY tonight - hopefully I can raise a bit of much needed cash! Nearly all of the games are the origi…
ANN: Tipshop updated Sunday, 28 October 2007Sunday 28 October 2007 I wasn't expecting to get this update out in time, but BST and insomnia fixed that! * CASA has been updated again, so we now…
... Tut's Treasure, Kung-Fu Master, Last Duel, Motorbike Madness,
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 ...Good advice for your wives and girlfriendsGood advice for your wives and girlfriends as published in the May 13, 1955 issue of Housekeeping Monthly. [b]Pay attention ladies!![/b] [FONT="Tim…
... . [u]Remember, he is the master of the house and as ...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 ...Group Order of Internal/External Kempston Turbo InterfacesI have contact Velesoft ([url]http://velesoft.speccy.cz/kmturbo-cz.htm[/url]) about the production of internal or external kempston turbo interfaces …
... with MB02 interface.
3. MASTER & SLAVE support: Is it ... K-MOUSE interfaces (MASTER and SLAVE). Switching between master and slave interface ...Latest issue of Retro Gamer[IMG][url]http://www.retrogamer.net/issues/RG_044.jpg[/url][/IMG] Complete History DOOM Prepare to get scared senseless as Retro Gamer looks back a…
... began
Retroinspection
Master System
Nintendo's NES ...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 ...Please Ignore this thread !!!Well looks like you didnt, ok dokey. Ever wonder if the Roman Empire is Still Going ? Yes the Catholics ! you might cry, fare point, but whos on to…
... is the sign of a master mason. They stand this way ...Best and worst arcade conversionsSaid in a last thread: [URL="http://www.worldofspectrum.org/forums/showthread.php?t=18335"]http://www.worldofspectrum.org/forums/showthread.php?t=18…
... ]worst[/I] was Kung-Fu master; there were a great difference ...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 ...James Bond Action Pack supported the Light GunHowdy folks, excellent idea to list games that supported the various light guns, I wish similar lists were made on other sites for the Master System…
... on other sites for the Master System and Megadrive (there are ...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 ...Just nuked Vista on my new Dell laptop for XPHave had this laptop for about six months. It came with Vista pre-installed. No one in the house liked it. - Wireless networking is the last thing t…
... symbol to appear next to clock
- Eye candy everywhere ...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 ...Box of Spectrum games for sale (and 2 Fontana books).Hi all, I need more space... :( I'm offering a lovely cardboard box (with some padding) containing a number of Spectrum games and two Spectrum book…
... , Hercules - Slayer Of The Damned, Master Of The Universe - The Movie ... Prix Challenge - Challenge.
[*] Cricket Master - Challenge.
[*] Wonderboy - Hit Squad ...Random variablesI made some programs in BASIC and saved into z80 files and I realized that they have some problems with ramdom variables. For example, I programmed …
... /> For example, I programmed a MASTER MIND game, where I must ...
