Still having probs with 74 series logic gates ?? - GSM-Forum

micklong · 03-12-2001, 22:58

hello all .. remember me !!

well im not sure about ya'all... but im still having problems with dejan ..

getting blank flash.outs .. (FF 00 FF 00 FF 00) but getting the graph etc etc ...

i am using an AMD (K6-II 450) which i have found out is bad for this. And some past posts suppported this because of the socket 7 motherboard... on board lpt bios not sopprting it (sound like i know what im talking about then did'nt it)

well the things i have found out, from romuors and browsing forums .. is that the 74 series chip Might b the problem ..
and that another chip is better ..
and again i am pointed to another series of logic chips ... the 4000 series
so i have had a look in maplin etc ..
and pinned down a quick list of suitable chips ..
4011B ,2 input nand gates (bit like 74hc132)
4049B ,6 NOT gates (buffered)
40106 ,6 NOT gates / hex schemitt trigger (like the origanal 74hc14)

so any opinions would b appreciated ..
and is a buffered logic chip a better choice??

im gonna be trying them soon anyway (esp. if i dont get a reply!)
well reagrds to all ... Mick ...

Stryker · 03-13-2001, 17:00

well, ive heard this also!

in fact, i already bought this chip. my problem is the pinouts, voltage, etc.. i cant find the specs. im still researching for it.

i'll experiment again with the schemes if im ready.

im sure others here in our forum used this chip. just let us know about it.

(this is so because i still cant make my laptop work, even i have the "modified flasher sw").

regards,
Stryker

micklong · 03-13-2001, 19:34

hello stryker !!! ..

what do ya mean by a "modified flasher sw" ??
do u have a modified dejan program ???

if u want the data sheet for it, then maplin is ya best bet .. (if not email me)

i will be ordering some in the near future to try, but would love some other people's experencie and opinions
and also would like to know a bit more about the, buffered chip option ?.. is it better ?

cheers Mick ! ..
[email protected]

[This message has been edited by micklong (edited 13 March 2001).]

koloksky · 03-13-2001, 23:49

hello micklong,

i have the same specs of pc with you

(amd k6-II 450) & it didn't work

, what i did is change my processor to P166 MMX & it worked!, i think its bec. of the processor.. i read somwhere that k6II got lots of probs&bugs when it comes to soft

, pls. let us know about the diff. IC if it worked

i still want to use my k6II processor

d_bug · 03-14-2001, 02:56

hmmm.... would be more than willing to make another circuit for this mick, just send me the datasheets.

regards
d_bug

micklong · 03-14-2001, 14:40

well its nice to get a good response to this ...
and thankyou koloksky it would seem that i have this problem then !! .. (but i have no other cpu chip to try ...grr)

and to the diagram sp people can try the 4000 series chip .. the one that is a better match is the 40106, which has the exact pinouts as the 74hc14 !! so just swop it over!
its is descibes as a 'hex schmitt trigger'
and the 4011b and 4049b are just normal buffered NAND/Not gates

love to now whats the diference between the normal gates, and a hex schmitt trigger ?

if u do need to now the schemes again i will make them and post them here for people to try .. (i will just change an existing one!)

well thanks again Mick ..

(oh and for datasheets, maplin does'nt seem to list the 40106 specificly. BUT RS do .. but theres loads of different types and makes of 40106?)

03-12-2001, 22:58	#1 (permalink)
micklong Freak Poster Join Date: Jan 2001 Location: UK Posts: 285 Member: 3153 Status: Offline Thanks Meter: 2	Still having probs with 74 series logic gates ?? hello all .. remember me !! well im not sure about ya'all... but im still having problems with dejan .. getting blank flash.outs .. (FF 00 FF 00 FF 00) but getting the graph etc etc ... i am using an AMD (K6-II 450) which i have found out is bad for this. And some past posts suppported this because of the socket 7 motherboard... on board lpt bios not sopprting it (sound like i know what im talking about then did'nt it) well the things i have found out, from romuors and browsing forums .. is that the 74 series chip Might b the problem .. and that another chip is better .. and again i am pointed to another series of logic chips ... the 4000 series so i have had a look in maplin etc .. and pinned down a quick list of suitable chips .. 4011B ,2 input nand gates (bit like 74hc132) 4049B ,6 NOT gates (buffered) 40106 ,6 NOT gates / hex schemitt trigger (like the origanal 74hc14) so any opinions would b appreciated .. and is a buffered logic chip a better choice?? im gonna be trying them soon anyway (esp. if i dont get a reply!) well reagrds to all ... Mick ...

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03-13-2001, 17:00	#2 (permalink)
Stryker Freak Poster Join Date: Jun 2000 Location: In front of pc Posts: 308 Member: 1585 Status: Offline Thanks Meter: 15	well, ive heard this also! in fact, i already bought this chip. my problem is the pinouts, voltage, etc.. i cant find the specs. im still researching for it. i'll experiment again with the schemes if im ready. im sure others here in our forum used this chip. just let us know about it. (this is so because i still cant make my laptop work, even i have the "modified flasher sw"). regards, Stryker

03-13-2001, 19:34	#3 (permalink)
micklong Freak Poster Join Date: Jan 2001 Location: UK Posts: 285 Member: 3153 Status: Offline Thanks Meter: 2	hello stryker !!! .. what do ya mean by a "modified flasher sw" ?? do u have a modified dejan program ??? if u want the data sheet for it, then maplin is ya best bet .. (if not email me) i will be ordering some in the near future to try, but would love some other people's experencie and opinions and also would like to know a bit more about the, buffered chip option ?.. is it better ? cheers Mick ! .. [email protected] [This message has been edited by micklong (edited 13 March 2001).]

03-13-2001, 23:49	#4 (permalink)
koloksky Freak Poster Join Date: Nov 1999 Posts: 156 Member: 719 Status: Offline Thanks Meter: 1	hello micklong, i have the same specs of pc with you (amd k6-II 450) & it didn't work , what i did is change my processor to P166 MMX & it worked!, i think its bec. of the processor.. i read somwhere that k6II got lots of probs&bugs when it comes to soft , pls. let us know about the diff. IC if it worked i still want to use my k6II processor

03-14-2001, 02:56	#5 (permalink)
d_bug Freak Poster Join Date: Jan 2001 Location: 13 00 N, 122 00 E (PH) Posts: 364 Member: 3156 Status: Offline Thanks Meter: 63	hmmm.... would be more than willing to make another circuit for this mick, just send me the datasheets. regards d_bug

03-14-2001, 14:40	#6 (permalink)
micklong Freak Poster Join Date: Jan 2001 Location: UK Posts: 285 Member: 3153 Status: Offline Thanks Meter: 2	well its nice to get a good response to this ... and thankyou koloksky it would seem that i have this problem then !! .. (but i have no other cpu chip to try ...grr) and to the diagram sp people can try the 4000 series chip .. the one that is a better match is the 40106, which has the exact pinouts as the 74hc14 !! so just swop it over! its is descibes as a 'hex schmitt trigger' and the 4011b and 4049b are just normal buffered NAND/Not gates love to now whats the diference between the normal gates, and a hex schmitt trigger ? if u do need to now the schemes again i will make them and post them here for people to try .. (i will just change an existing one!) well thanks again Mick .. (oh and for datasheets, maplin does'nt seem to list the 40106 specificly. BUT RS do .. but theres loads of different types and makes of 40106?)