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#111024 - 10/10/17 11:06 PM Re: VME boards [Re: Edstrom]  
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It's merged now and roms are on messftp. No docs (yet -- they exist, just have to be scanned, I am waiting for that), but I suspect that code tests if IRQ is triggered after it's unmasked.

#111025 - 10/11/17 12:12 AM Re: VME boards [Re: Edstrom]  
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Ok I got it up and running now and I got the self test to hang obviously since the emulation is not complete but is there an actual problem apart from that?

Selftests does torture the emulation and as it is optional you can just ignore it for now I think as interrupts seems to work just fine from what I can see when the firmware is communicating with the terminal.

#111028 - 10/11/17 06:40 AM Re: VME boards [Re: Edstrom]  
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Well, passing self test gives some confidence that emulation is done correctly smile Interrupt line is not hooked up, so firmware must be doing polled i/o.

Let's wait until the docs are scanned, anyway

#111037 - 10/11/17 06:57 PM Re: VME boards [Re: Edstrom]  
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Sure, do you have a picture of the board already were we might see if there is a VME controller ASIC and a BIM or some other IRQ controller suspects?

#111039 - 10/12/17 06:38 AM Re: VME boards [Re: Edstrom]  
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No pictures yet - only a brief spec sheet - newdoc/hcpudocu_txt in http://ftp.stu.neva.ru/besta/sysv-misc/docs-html-koi8.tar.gz

#111150 - 10/24/17 09:49 PM Re: VME boards [Re: Edstrom]  
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more complete spec sheet + schematics -- https://yadi.sk/d/4jiyxn373P48Mn

no BIM or ASIC, just a bunch of PLM (no dumps of those)

#111151 - 10/24/17 10:35 PM Re: VME boards [Re: Edstrom]  
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Ok, you just need to check how to the IRQ is connected to the 68020 and make sure the driver provides the vector from the DUSCC. It looks like many interrupts can be polled in one go through the 74ALS240 on page 17, question is where the IRQ is routed and if it in fact interrupts the 68020 CPU at all, I may be that it causes a generic interrupt for the 68030 which reads the interrupt source and deals with it, in which case there is no vector from the DUSCC.

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