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--------------96412276711959624513665731661006949428 Content-Type: text/plain; charset=3Dutf-8; format=3Dflowed Content-Transfer-Encoding: 8bit Hi all Quick update: I have the "secondary" MF/PIC board assembled. It provides UA= RT and IDE interfaces only, interrupts are routed (through spare inverters)= to the bus IRQ lines (I am using IRQ0 for serial, IRQ1 for IDE) and handle= d by the NS32202 on the primary MF/PIC. About a dozen chips on the secondar= y board can be omitted. Both IDE and UART interfaces are confirmed working. I have swapped the AHCT login on the bus transceivers for LS series. No noi= se issues observed (so far!) in combinations of bus slots which were previo= usly problematic. I had some issues with the interrupt controller; the timer would stop ticki= ng when Linux booted. Resolved by increasing from 2 to 3 wait-states on I/O= . I have not had this previously, unclear if the change to slower LS logic = on the transceivers is related. I have enough chips to swap all back to AHC= T so I may try that when I have the software issues sorted. I have PPP up and running on the second UART; I can ping stuff on the inter= net etc. However some issues remain to investigate: root@darkstar:~# wget sowerbutts.com --2016-03-04 22:11:33-- http://sowerbutts.com/ Resolving sowerbutts.com (sowerbutts.com)... 195.149.84.65 Connecting to sowerbutts.com (sowerbutts.com)|195.149.84.65|:80... connecte= d. HTTP request sent, awaiting response... 200 OK Length: 2188 (2.1K) [text/html] Saving to: 'index.html' index.html 0%[ ] 0 --.-KB/s in 0s 2016-03-04 22:11:33 (0.00 B/s) - Read error at byte 0/2188 (Invalid argumen= t). Retrying. Possibly wget is using some kernel feature I've compiled out, or maybe it d= oesn't like the fact that our timers have only 10ms resolution. Need to inv= estigate. Telnet to port 80 on the web server and typing the request in by = hand works fine so the TCP stack is certainly working. I have issues with interrupt priorities; with the 1Mbit/sec serial port on = IRQ0 (highest priority) it is possible to send data at 1Mbit/sec and overwh= elm the machine. Similarly with second IDE on IRQ1 and timer on IRQ8 when y= ou use the second IDE interface heavily about 60% of timer interrupts are l= ost. I have looked in the NS32202 datasheet and I see it has several different p= riority modes including a "rotating priority" mode. Also there is the optio= n of edge/level triggering. There is also interrupt nesting to consider. I= need to sit down and figure out which modes would be best and how they wou= ld interact with Linux's IRQ handling. It may be that the best solution is actually to have the timer as the highe= st priority interrupt, followed by the serial ports, with IDE last. This ma= y mean some more hardware mods to re-arrange to fit the required order. Can anyone confirm my ideas about the '202; - An EOI cycle (ie read with A13 set) simply clears the highest priority b= it that is set in the ISRV register - The CPU can also clear the bit in ISRV itself by reading, masking, and w= riting back the register; doing this removes the need for a separate EOI - Writing (eg) 8 to FPRT will make IRQ8 the highest priority, so the prior= ity order becomes: 8, 9, 10, 11, 12, 13, 14, 15, 0, 1, 2, 3, 4, 5, 6, 7 ie = it just rotates the priority around -- the datasheet is unclear on this poi= nt. Also can anyone confirm my understanding that we could run all the devices = on this system in EITHER edge or level triggered modes without issue. If anyone has thoughts on edge vs level, priorities, and the various modes = of the 202, input would be most welcome at this stage. Hmmmmmm. Lots to think about! But enough for tonight. Tomorrow I am in Lond= on all day so it will probably be Sunday before I get to look at this again. To participate in the discussion, go here: http://www.retrobrewcomputers.or= g/forum/index.php?t=3Drview&th=3D38 --------------96412276711959624513665731661006949428 Content-Type: text/html; charset=3Dutf-8 Content-Transfer-Encoding: 8bit <!DOCTYPE html> <html lang=3D"en" dir=3D"ltr"> <head> <meta charset=3D"utf-8"> <title>RetroBrew Computers Forum</title> <base href=3D"http://www.retrobrewcomputers.org/forum/" /> <link rel=3D"stylesheet" href=3D"theme/default/forum.css" /> </head> <body> <div class=3D"content"> <table cellspacing=3D"1" cellpadding=3D"2" class=3D"ContentTable"> <tr class=3D"RowStyleB"> <td width=3D"33%"><b>Subject:</b> Re: Linux on KISS-68030 single board com= puter</td> <td width=3D"33%"><b>Author:</b> will</td> <td width=3D"33%"><b>Date:</b> Fri, 04 March 2016 22:43</td> </tr> <tr class=3D"RowStyleA"> <td colspan=3D"3"> =09=09 Hi all<br /> <br /> Quick update: I have the "secondary" MF/PIC board assembled. It p= rovides UART and IDE interfaces only, interrupts are routed (through spare = inverters) to the bus IRQ lines (I am using IRQ0 for serial, IRQ1 for IDE) = and handled by the NS32202 on the primary MF/PIC. About a dozen chips on th= e secondary board can be omitted.<br /> <br /> Both IDE and UART interfaces are confirmed working.<br /> <br /> I have swapped the AHCT login on the bus transceivers for LS series. No noi= se issues observed (so far!) in combinations of bus slots which were previo= usly problematic.<br /> <br /> I had some issues with the interrupt controller; the timer would stop ticki= ng when Linux booted. Resolved by increasing from 2 to 3 wait-states on I/O= . I have not had this previously, unclear if the change to slower LS logic = on the transceivers is related. I have enough chips to swap all back to AHC= T so I may try that when I have the software issues sorted.<br /> <br /> I have PPP up and running on the second UART; I can ping stuff on the inter= net etc. However some issues remain to investigate:<br /> <br /> <div class=3D"pre"><pre> root@darkstar:~# wget sowerbutts.com --2016-03-04 22:11:33-- http://sowerbutts.com/ Resolving sowerbutts.com (sowerbutts.com)... 195.149.84.65 Connecting to sowerbutts.com (sowerbutts.com)|195.149.84.65|:80... connecte= d. HTTP request sent, awaiting response... 200 OK Length: 2188 (2.1K) [text/html] Saving to: 'index.html' index.html 0%[ ] 0 --.-KB/s in 0s 2016-03-04 22:11:33 (0.00 B/s) - Read error at byte 0/2188 (Invalid argumen= t). Retrying. </pre></div><br /> <br /> Possibly wget is using some kernel feature I've compiled out, or maybe it d= oesn't like the fact that our timers have only 10ms resolution. Need to inv= estigate. Telnet to port 80 on the web server and typing the request in by = hand works fine so the TCP stack is certainly working.<br /> <br /> I have issues with interrupt priorities; with the 1Mbit/sec serial port on = IRQ0 (highest priority) it is possible to send data at 1Mbit/sec and overwh= elm the machine. Similarly with second IDE on IRQ1 and timer on IRQ8 when y= ou use the second IDE interface heavily about 60% of timer interrupts are l= ost.<br /> <br /> I have looked in the NS32202 datasheet and I see it has several different p= riority modes including a "rotating priority" mode. Also there is= the option of edge/level triggering. There is also interrupt nesting to c= onsider. I need to sit down and figure out which modes would be best and ho= w they would interact with Linux's IRQ handling.<br /> <br /> It may be that the best solution is actually to have the timer as the highe= st priority interrupt, followed by the serial ports, with IDE last. This ma= y mean some more hardware mods to re-arrange to fit the required order.<br = /> <br /> Can anyone confirm my ideas about the '202;<br /> - An EOI cycle (ie read with A13 set) simply clears the highest priority b= it that is set in the ISRV register<br /> - The CPU can also clear the bit in ISRV itself by reading, masking, and w= riting back the register; doing this removes the need for a separate EOI<br= /> - Writing (eg) 8 to FPRT will make IRQ8 the highest priority, so the prior= ity order becomes: 8, 9, 10, 11, 12, 13, 14, 15, 0, 1, 2, 3, 4, 5, 6, 7 ie = it just rotates the priority around -- the datasheet is unclear on this poi= nt.<br /> <br /> Also can anyone confirm my understanding that we could run all the devices = on this system in EITHER edge or level triggered modes without issue.<br /> <br /> If anyone has thoughts on edge vs level, priorities, and the various modes = of the 202, input would be most welcome at this stage.<br /> <br /> Hmmmmmm. Lots to think about! But enough for tonight. Tomorrow I am in Lond= on all day so it will probably be Sunday before I get to look at this again= .<br /> =09=09 </td> </tr> <tr class=3D"RowStyleB"> <td colspan=3D"3"> [ <a href=3D"http://www.retrobrewcomputers.org/forum/index.php?t=3Dpost&r= eply_to=3D410">Reply</a> ][ <a href=3D"http://www.retrobrewcomputers.org/fo= rum/index.php?t=3Dpost&reply_to=3D410"e=3Dtrue">Quote</a> ][ <a href=3D= "http://www.retrobrewcomputers.org/forum/index.php?t=3Drview&goto=3D410#msg= _410">View Topic/Message</a> ][ <a href=3D"http://www.retrobrewcomputers.or= g/forum/index.php?t=3Drview&th=3D38">Unsubscribe from this topic</a> ] </td> </tr> </table> </div> </body></html> --------------96412276711959624513665731661006949428--
How to fix?
Make sure FUDForum is sending a notification email:
- Look for “Content-Type: text/plain”, “Content-Type: text/html”, and 3x dividers “————–”.
- If all three are present, split out the plain text and html and add to the POST request used to send the notification email.
- HTML is easy - look for position of <!DOCTYPE html> and </html> and split out this section
- Plain text is a bit harder -
