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What's the most probable......cause for this on a grey +2? (z80 is excluded) [url]http://img376.imageshack.us/img376/8087/plus2hk9.jpg[/url]
... leave pins floating on NMOS/CMOS because unpredictable things will happen ... -
5v Transformer.I've got a 5v 3A transformer, would this be ok to use with two 3.5 inch floppy drives?
... will be too much for CMOS inputs :-)
The datasheet ... -
Reading the border colorI am building a snap-button to my ZX-PC Interface. Is there a way to read the bordercolor which is set by an OUT-command. (and please don't tell me …
... logic rather than LSTTL since CMOS inputs have a much higher ... -
Why design a new Spectrum?Every so often, someone posts up about designing a portable Spectrum, or a new Spectrum with improved hardware capabilities, but I don't see why. I m…
... ultimate Game Boy - with modern CMOS components, unlike a laptop PC ... -
Is Ferranti still alive ?And if not......why should there be any restrictions on manufacturing the ULA ?
... - quite easily. A single 64K CMOS static RAM for all of ... -
Why design a new Spectrum?Every so often, someone posts up about designing a portable Spectrum, or a new Spectrum with improved hardware capabilities, but I don't see why. I m…
... ultimate Game Boy - with modern CMOS components, unlike a laptop PC ... -
TC2068 emulator cart - problemHi, Sorry for posting timex related stuff on a spectrum forum. So, this cart (spectrum emulator) can only adress 16K. I can load small games but i …
... with leaving inputs unconnected. A cmos part, eg, must have its ... -
self-congratulatory post...Yay!!! Look what I just won!!! [url]http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=330125084105&ssPageName=ADME:L:DBS:US:11[/url] Andrew
... can be susbstituted for HCT CMOS, getting the RAM (long out ... -
self-congratulatory post...Yay!!! Look what I just won!!! [url]http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=330125084105&ssPageName=ADME:L:DBS:US:11[/url] Andrew
... can be susbstituted for HCT CMOS, getting the RAM (long out ... -
After Clive - why did computing go backwards?Just a thought on from another thread a couple days ago. 25+ years ago Clive made a tiny computer which fitted in your pocket (ok it had to be a lar…
... too many MHz (or GHz). CMOS only consumes current (apart from ... -
After Clive - why did computing go backwards?Just a thought on from another thread a couple days ago. 25+ years ago Clive made a tiny computer which fitted in your pocket (ok it had to be a lar…
... too many MHz (or GHz). CMOS only consumes current (apart from ... -
UlaI remplaced an ULA 6c001-6 by an ULA 6c001-7 chip on issue 3B board. It is "crucial" to remove R32 and adding the 2x NAND gates ??? or not ? Thanks.
... swapping the CPU with a CMOS version, since the 'on' resistance ... -
Notation questionI wasn't quite sure where to put this post, so anyone's welcome to move it whereever may be more appropriate. So I'm reading about Z80 interrupts he…
... or low by (in a CMOS chip) having a complimentary pair ... use much more power than CMOS - whenever an NMOS logic gate ... -up resistor and using power. CMOS on the other hand, only ... -
Disable onboard memoryWould this work...? Access to onboard I/O can be disabled by holding IORQGE high. Would it be possible to create a MEMRQGE in a similar way to disa…
... 't replace TTL logic with CMOS series there). -
Interface extension cable ?I'm wondering if I can make an extension cable for the Speccy's expansion port. It's not the part of making it I'm uncertain about, but wether the l…
... . But my thing is exclusively CMOS, which has lower output impedances ... -
Interface extension cable ?I'm wondering if I can make an extension cable for the Speccy's expansion port. It's not the part of making it I'm uncertain about, but wether the l…
... ]But my thing is exclusively CMOS, which has lower output impedances ... -
Interface extension cable ?I'm wondering if I can make an extension cable for the Speccy's expansion port. It's not the part of making it I'm uncertain about, but wether the l…
... using an ADC.
CMOS parts at least seem to ... -
What I hate about computers and/or video gamingYesterday I spent approximately four months (subjecively that is, objectively it was around two to three hours) fixing my mate's PC. I won't bore you…
... more heat it will make. CMOS uses energy when switching, so ... -
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…
... too much heat to be CMOS, and I presume the outputs ... -
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…
... to suffer SCR latchup (CMOS and quite probably NMOS chips ... manufactured. This will be CMOS and will draw considerably less ... a couple of new CMOS Z80s and I've ... logic: you can use modern CMOS parts (74HCT), lower power ... , which use a modern CMOS static RAM (and a ... -
Trying to create NMI, whats this switch?Hi, I have been reading a book Z80 Applications, and I am trying to create a simple device for creating a NMI. Here is a schematic: [url]http://www…
... a resistor (floating inputs for CMOS or NMOS are bad) unless ... small value - especially when using CMOS gates (the resistor can be ... megohm, and will use microamps. CMOS inputs generally have enormous input ... as logic 1, but for CMOS, floating is undefined and ... -
Z80 CPUs goin cheap.This guy is selling them very cheaply and has a couple multi item auctions for them. Thought I would post here in case people were looking for one/so…
... faster) and are made using CMOS rather than NMOS (and so ... -
Z80 CPUs goin cheap.This guy is selling them very cheaply and has a couple multi item auctions for them. Thought I would post here in case people were looking for one/so…
... is Z84C0008PEG (Z84C00 means a CMOS Z80 CPU, 08 means rated ... . I have a brand new CMOS one in the ALIAC-2 ... -
MULTITECH pictures[url]http://velesoft.speccy.cz/data-gear.htm[/url]
... version (7-8 USD). But CMOS DMA in DIP package use ... -
Input/Output on Edge ConnectorI would like to sense a pulse on the data bus via the edge connector, i.e. on or off. How do you decide what port it is on? I would also like to send…
... /> You can get 74HCT* chips (CMOS TTL-compatible) an 74HC* chips ... (plain CMOS, I've found they work ... -
Spectrum ethernet... step 1.1Yeah, a tenth of a step :-) Here's the W5100 board up and WORKING: [url]http://www.alioth.net/tmp/w5100-online.jpg[/url] This is called the "Get Th…
... with 5 volt Z80s, even CMOS ones (they all claim to ... -
divIDE woesHi y'all ! Last night I built my lovely divIDE ;-) I downloaded flasher and +divide.tap from [url]http://www.biehold.nl/rudy/+divide/index.htm[/url…
... -Z state (and thus a CMOS input will tend to show ... -
Ethernet blog updated......today, we send our first packet and run into a bit of a gnarly snag: [url]http://spectrum.alioth.net/doc/index.php/Current_events[/url]
... higher since it is all CMOS, rather than a mix of ... -
Source of Z80 ProcessorsHi all, After seeing the somewhat inflated prices that +2A's and +3's seem to be going for on eBay I'm wondering if trying to fix my 48k+ is a bette…
... . (Z84C is the code for CMOS Z80 (the old NMOS ones ...
