Comments on: Reverse-Engineering Custom Logic (Part 1) http://www.flylogic.net/blog/?p=32 Mon, 06 Sep 2010 15:28:41 -0700 hourly 1 http://wordpress.org/?v=3.0.1 By: MacDeath http://www.flylogic.net/blog/?p=32&cpage=1#comment-1601 MacDeath Sun, 14 Feb 2010 08:10:18 +0000 http://www.flylogic.net/blog/?p=32#comment-1601 Hi. Interesting work. Being an Amstrad 8 bit retrofan (popular 80's computers in western Europa), we are having a problem with the Amstrad Cartridge Identification Device used on the GX4000/PLUS range. Would you know the cost of a proper anaysis process ? Or tutorials to achieve it cheaply ? Legal aspect is not an issue as it was sort of Abandonwared. Hi.
Interesting work.

Being an Amstrad 8 bit retrofan (popular 80′s computers in western Europa), we are having a problem with the Amstrad Cartridge Identification Device used on the GX4000/PLUS range.

Would you know the cost of a proper anaysis process ? Or tutorials to achieve it cheaply ?
Legal aspect is not an issue as it was sort of Abandonwared.

]]> By: Anshuman http://www.flylogic.net/blog/?p=32&cpage=1#comment-1445 Anshuman Thu, 21 May 2009 13:41:52 +0000 http://www.flylogic.net/blog/?p=32#comment-1445 hi, i want to know if it is possible to read locked pic micro controller? if yes how to do that any help? hi,
i want to know if it is possible to read locked pic micro controller? if yes how to do that any help?

]]> By: HeBD http://www.flylogic.net/blog/?p=32&cpage=1#comment-1356 HeBD Fri, 09 Jan 2009 02:54:05 +0000 http://www.flylogic.net/blog/?p=32#comment-1356 yes thanks. i found the FET page last night after the 4004 post actually and it almost all makes sense now :) only thing is the ones with the 'o' are the + ones. is the 'o' to show the switching sense is inverted? thanks for your responses yes thanks. i found the FET page last night after the 4004 post actually and it almost all makes sense now :)

only thing is the ones with the ‘o’ are the + ones. is the ‘o’ to show the switching sense is inverted?

thanks for your responses

]]> By: Intel 4004 « Flylogic Engineering’s Analytical Blog http://www.flylogic.net/blog/?p=32&cpage=1#comment-1355 Intel 4004 « Flylogic Engineering’s Analytical Blog Thu, 08 Jan 2009 20:45:53 +0000 http://www.flylogic.net/blog/?p=32#comment-1355 [...] slower than alternatives such as CMOS, which combines PMOS and NMOS transistors as illustrated in this post. It’s beautiful to see how none of the inefficiencies we see in modern chips are found on the [...] [...] slower than alternatives such as CMOS, which combines PMOS and NMOS transistors as illustrated in this post. It’s beautiful to see how none of the inefficiencies we see in modern chips are found on the [...]

]]> By: admin http://www.flylogic.net/blog/?p=32&cpage=1#comment-1354 admin Thu, 08 Jan 2009 02:08:32 +0000 http://www.flylogic.net/blog/?p=32#comment-1354 HeBD, To further add to Karstens reply, possibly look at the Wkipedia article on <a href="http://en.wikipedia.org/wiki/Field-effect_transistor" rel="nofollow">FET's</a>. HeBD,
To further add to Karstens reply, possibly look at the Wkipedia article on FET’s.

]]> By: Karsten Nohl http://www.flylogic.net/blog/?p=32&cpage=1#comment-1353 Karsten Nohl Wed, 07 Jan 2009 21:46:21 +0000 http://www.flylogic.net/blog/?p=32#comment-1353 HeBD, the transistors do actually <a href="http://www.cs.virginia.edu/~kn5f/img/flylogic_transistor.png" rel="nofollow">look pretty much like the schematic on Wikipedia</a>. All modern chips are built from <a href=http://en.wikipedia.org/wiki/CMOS rel="nofollow">PMOS and NMOS transistors</a> (PMOS being the ones with the 'o'). Short of dying the chip, you can distinguish PMOS and NMOS only by their sizes: PMOS are typically larger since they have less drive than NMOS of similar size HeBD,
the transistors do actually look pretty much like the schematic on Wikipedia.
All modern chips are built from PMOS and NMOS transistors (PMOS being the ones with the ‘o’). Short of dying the chip, you can distinguish PMOS and NMOS only by their sizes: PMOS are typically larger since they have less drive than NMOS of similar size

]]> By: HeBD http://www.flylogic.net/blog/?p=32&cpage=1#comment-1350 HeBD Wed, 07 Jan 2009 01:39:10 +0000 http://www.flylogic.net/blog/?p=32#comment-1350 what about ppl who dont buy mags? anything on the net? i cant see a transistor in the images :( can some one trace out the p n material blobs for me? also why does the top transistor have a 'o' on it? it looks the same to me :S i feel your not telling me something important that i need to know to get this or am i just retarded? the above images look nothing like the ones at http://en.wikipedia.org/wiki/Bipolar_junction_transistor what about ppl who dont buy mags? anything on the net?

i cant see a transistor in the images :( can some one trace out the p n material blobs for me?

also why does the top transistor have a ‘o’ on it? it looks the same to me :S i feel your not telling me something important that i need to know to get this or am i just retarded? the above images look nothing like the ones at http://en.wikipedia.org/wiki/Bipolar_junction_transistor

]]> By: Jay Shroff http://www.flylogic.net/blog/?p=32&cpage=1#comment-1291 Jay Shroff Fri, 19 Sep 2008 21:36:36 +0000 http://www.flylogic.net/blog/?p=32#comment-1291 Cool can't wait for the make mag article, I will be looking for it Thanks Cool can’t wait for the make mag article, I will be looking for it

Thanks

]]> By: Alfred http://www.flylogic.net/blog/?p=32&cpage=1#comment-1290 Alfred Thu, 18 Sep 2008 06:15:49 +0000 http://www.flylogic.net/blog/?p=32#comment-1290 Probably a D Flip-flop. Probably a D Flip-flop.

]]> By: Jeri Ellsworth http://www.flylogic.net/blog/?p=32&cpage=1#comment-1287 Jeri Ellsworth Wed, 17 Sep 2008 00:49:10 +0000 http://www.flylogic.net/blog/?p=32#comment-1287 I'm working on an article for make magazine. I'll be giving it to them in 30-60 days. I'm experimenting to see if I can substitute the compress nitrogen now. -Jer I’m working on an article for make magazine. I’ll be giving it to them in 30-60 days.

I’m experimenting to see if I can substitute the compress nitrogen now.

-Jer

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