Removing offtopic Section C't 512 KB internal RAM expansion

[nurgle]

May I remove the offtopic section of the following page, please?

http://www.cpcwiki.eu/index.php/C%27t_512_KB_internal_RAM_expansion

[Devilmarkus]

May I remove the offtopic section of the following page, please?

http://www.cpcwiki.eu/index.php/C%27t_512_KB_internal_RAM_expansion

Good idea.
I find it's crap.
But let's check the other reactions...

[Octoate]

Yep, unimportant for this article and not even hardly CPC related.

[nocash]

Thanks for asking. Yes, it's not important to me. Remove it if you don't want it there.

Meanwhile I found more serious info (asked in the c't forum 1-2 months ago, if somebody has those old articels, and surprisingly somebody mailed them a few days ago, when I was no longer hoping for it.

Working on the article at the moment... but it's still messy. Just uploaded a "colorized" schematic. It should be much clearer than the original schematic.

Does somebody understand the syntax for the PAL chip? For example,

Code Select Expand


  IF (VCC) X = A * B +
                    C * D


My current conclusions (may be wrong):
"IF (VCC)" means nothing, can be ignored.
"*" means AND
"*" has priority above "+"
"+" means ...what? xor? or?

Another example,

Code Select Expand


  IF (GND) /Y = /Y


I guess that doesn't mean anything at all (?) and can be ignored, too.

[nurgle]

Thanks for asking. Yes, it's not important to me. Remove it if you don't want it there.

Done.

Btw. Disregarding the removed section this is a good article indeed! Lots of info you collected there. Of course your frequent changes drew me to the article in the first place (via recent changes). Unfortunately I can not help with the content. I find it puzzling that I did not yet meet anyone who actually built this extension. Have to ask around on next XzentriX.

[Ygdrazil]

Hi


Yeah it's a great article, with lots of nice info!! I really like it.


I to wonder howcome I newer have heard about this memory expansion before!


/Ygdrazil

Done.

Btw. Disregarding the removed section this is a good article indeed! Lots of info you collected there. Of course your frequent changes drew me to the article in the first place (via recent changes). Unfortunately I can not help with the content. I find it puzzling that I did not yet meet anyone who actually built this extension. Have to ask around on next XzentriX.

[Bryce]

In the "missing info" it lists Schematics / chipset, but there's a Schematic directly below and in the scanned article?? Are further Schematics missing, or have you just forgotten to update the missing items list?

Bryce.

[Gryzor]

Well, the article is great, but indeed the off-topic was more than confusing: it was more of a google-bomb actively causing confusion instead of helping...

[nocash]

Yeah, wasn't my best joke. And, yup, google didn't have more useful info on cpc6512. I hope it didn't do too much confusion - you didn't try firing grenades at the mainboard, did you? :-)

Aye, the "missing info" part is outdated (as is about half of the article). Still working on it, the "junk" will be sorted out soon. For the PAL question - I'll repost it in the hardware forum, let's go on there: http://cpcwiki.eu/forum/index.php/topic,556.msg8568.html#msg8568