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Changes for page Front I/O

Last modified by Kevin Wiki on 2024/07/07 22:48
From version 7.1
edited by Kevin Wiki
on 2024/07/05 09:25
Change comment: Deleted image "xserve io main cable pinout.drawio.svg"
To version 7.3
edited by Kevin Wiki
on 2024/07/05 09:31
Change comment: There is no comment for this version

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9 9  [[image:xserve io main cable and PCB pinout.drawio.png||alt="xserve io main cable pinout.drawio.png"]]
10 10  
11 11  (% class="wikigeneratedid" %)
12 -[[attach:xserve io main cable pinout.drawio.svg||target="_blank"]]
12 +[[attach:xserve io main cable and PCB pinout.drawio.svg||target="_blank"]]
13 13  
14 -
15 15  (% class="wikigeneratedid" %)
16 16  This cable allows us to communicate with 4 chips using two data lines, audio & service switch, case switch and (yet to be documented) compute LEDs
17 17  
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149 149  
150 150  == SAA1064T data for driving center IO LED stack ==
151 151  
152 -Center IO stack is a stack of 23 LED's, 22 blue and 1 green for ethernet activity. These are duplicated next to each other and driven by each their SAA1064T chips. Earlier we found the i2c address and just by playing around figured out that 4 segments of 1 byte binary values are used to set ship register.
151 +Center IO stack is a stack of 24 LED's, 23 blue and 1 green for ethernet activity. These are duplicated next to each other and driven by each their SAA1064T chips. Earlier we found the i2c address and just by playing around figured out that 4 segments of 1 byte binary values are used to set ship register.
153 153  
154 154  {{code language="C++"}}
155 155  void fillColumns() {
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167 167  {{/code}}
168 168  
169 169  (% class="wikigeneratedid" %)
170 -Here the last byte we send only is 5 bits since we only have 5 LEDs instead of 6 to address (total of 23). Also note that we start the transmission with a single bit.
169 +~-~- Here the last byte we send only is 5 bits since we only have 5 LEDs instead of 6 to address (total of 24). Also note that we start the transmission with a single bit. ~-~-
171 171  
172 172  == Pinouts voltages from MLB ==
173 173  
xserve io main cable and PCB pinout.drawio.svg
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1 +XWiki.kevin
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