zxchris
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@ excellent port page
1:01 PM Sep 24th
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in reply to jorallan
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Why can't Apple allow wifi and 3G to be switched from the app page of the iPhone? I know, lets bury features that improve battery life......
2:50 AM Sep 21st
from Tweetie
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Spent the weekend writing a new speccy game. Loved combing the code slashing t-states here, there and everywhere. Such selfish satisfaction!
2:46 AM Sep 21st
from Tweetie
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Spent three days juggling estimated gate delays, measured timings and schematics, to get them to add up. I don't know if I've fudged it!
7:06 AM Aug 27th
from Tweetie
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Meet going well. Lots of hardware and demos. Winstons spectranet being demoed at the moment. Sinclair Ethernet... Yay!
8:16 AM Jun 27th
from Tweetie
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On my way to the CSS/WOS Sinclair meet-up in Oxford. It's good to talk.
3:41 AM Jun 27th
from Tweetie
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The ULA schematics are done, plus example pages of book released .
1:10 AM Jun 24th
from Tweetie
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ULA quater four annotated and discovered a number of bugs! I pretty much know how it all works now. Just the data latches in Q3 to uncover.
12:56 PM Jun 14th
from Tweetie
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Got the second quarter of the ULA drawn up as logic gates. Annoyingly I can't explain what is going on until I document quarter 4.
2:10 AM Jun 7th
from Tweetie
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Approx 960 transistors and 720 resistors and about 100 hours later, I'm halfway through the phase 1 schematic of the ULA. Labourious!
6:11 AM May 21st
from Tweetie
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Finished annotating one quarter of the ULA. Started redrawing this as logic gates for a change of scene. First out, a D-type flip-flop.
12:58 AM Apr 23rd
from web
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Excited that a NTSC ULA has turned up. Will hopefully confirm some timing assumptions. Need to run P.K.'s fusetest....
2:36 PM Apr 9th
from Tweetie
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Pieced together a whole new ULA type today from an undocumented photo and snippets of info... Looks like an early 5000 CML
12:51 PM Mar 28th
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Not going to get much book done today. Having a day off, going out in the sunshine.
2:22 AM Mar 19th
from Tweetie
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One thing is apparent. There are a lot of detailed illustrations in this book... I'm up to 18 in Ferranti chapter
11:13 AM Mar 17th
from Tweetie
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I'm currently finishing off the diagrams for the Ferranti section, and doing a complete write up of the 6000 series ULA.
3:39 AM Mar 15th
from web
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Completing the Ferranti section of the "The Sinclair ZX Spectrum ULA"
1:07 PM Mar 14th
from web
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- Name Chris Smith
- Web http://www.zxdesi...
- Bio Software architect, FSF supporter, Linux hacker, electronics tinkerer, ZX Spectrum enthusiast.
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