The z80 CPU can only address a single 64k area at a time. Half of this is mapped to variable locations in ROM; which areas are mapped is changed using port 6. The other half is mapped to RAM, but this limits you to 32k of RAM. The OS, and indeed the cpu, wouldn't have the faintest clue of what to do with the rest. The least of your problems would be having too many pins and not enough places to solder them.
Edit: Kllrnohj! You're killing me here! 🙂
now I may be wrong here, but don't the Silver Editions have like, 144k RAM chips, just only 24K is accessible.
rivereye wrote:
now I may be wrong here, but don't the Silver Editions have like, 144k RAM chips, just only 24K is accessible.
only 32k is accessible. The Silver OS can page the RAM the same way it pages ROM, but that 144k is still hard-coded.
yeah, 32k is accessible on the BE calcs to, however 8k of that is used by the OS.
KermMartian wrote:
Edit: Kllrnohj! You're killing me here! 🙂
Hey, don't blame me cause you are slow 😛
I dig the pics Kerm. 😎
Lol, you lost some keys 😁
It's ok, I have that spare nonworking calc to take keys from 🙂 not to mention plastic bits to fill in the PS/2 port area...
hmm, maybe I should look into doing this to my 84+SE (shouldn't be hard, and I do have a dead one to test with).
@The_Ram_Thing:Okay... Makes sense
@Kerm: I was thinking you should varnish it/coat it with clear plastic. Cause that paint is going to get sticky when it gets to hot.
I was looking at the pix earlier today, and the pain job reminds me of a mustang 😄 😄
I think I should varnish it too. Trouble is, I'm not sure what kind of varnish to use (if there are different types). Does anyone have any ideas?
Ask around at a hobby shop. They should be able to tell you what you will need to do, since it is plastic... 🙂
tifreak8x wrote:
Ask around at a hobby shop. They should be able to tell you what you will need to do, since it is plastic... 🙂
Plastic covered with enamel paint, that is.
Ah, here we go: http://www.doubleogauge.com/journal/enamelpaint.htm wrote:
Varnishes
Although strictly beyond the scope of this article, I ought to say a few words about varnishes. If you are painting items of rolling stock, chances are that you need to 7 letter and number them, and most of the time transfers are the obvious solution. -Once applied, it is common practice to protect the transfers from being rubbed off through repeated handling by coating them I. with a thin layer or two of varnish, most often matt or satin. Humbrol, RailMatch -and Phoenix Precision all supply their own brands of model varnish in matt, satin and gloss — even special varnish thinners in the case of Phoenix Precision. Humbrol matt varnish slightly thinned with genuine turpentine and applied with a good brush -works well to protect transfers on matt- 7 painted wagons. I have no experience of either RailMatch or Phoenix Precision varnish products.
But if you are planning on airbrush varnishing entire rakes of coaches, avoid the specialist model paint manufacturers altogether and head for your nearest DIY outlet. A 250 ml can of Ronseal satin polyurethane varnish will surely last a lifetime, and if you follow Guy Williams’(of Pendon fame) recommendation, thin it with Humbrol thinners and tint it with Humbrol matt black and dark earth to taste before running it through your airbrush. The results are superb!
Kerm.. that is crazy... I so want a calculator mouse... lol
yeah he is, but that would rock to have.
So anyway, I keep meaning to sand and varnish this sucker, but I keep not having time. I'll get to it eventually.
wait wait wait...
KermMartian wrote:
On my way back from tutoring this evening...
unbelievable! Kerm goes to tutoring!
I think he teaches there.
Hey Kerm, how hard would this be to do to an 84+SE?
Yeah, I tutor. Anyway, I'm not sure how hard this would be for an 84+SE, since the layout and PCB configuration is a bit different.
OMG DIGG EFFECT 🥷
You have 600 and something diggs right now o.O
Yes I do. At one point not very much fewer than ONE THOUSAND simultaneous users were online.
