Problem with H4 not booting (zChris's board)

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zChris
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Re: Problem with H4 not booting (zChris's board)

Post by zChris »

sporniket wrote: Sun Aug 22, 2021 7:17 am
exxos wrote: Sat Aug 21, 2021 11:55 pm I'm confused what that last scope line is supposed to be, before you stated




So deadliness look fine if they are the top waveform. Same with AS. So I don't know what "analogue adressline" is referring to, I just assume that scope probe was not connected.
I believe that "analogue adressline" (with a little 'A0' tag on the left) means the actual voltage of the address line on the probe, and then "channel 0 at the top" (marked 'D0') as well as Channel 1 (marked 'D1') are the interpretations as logic high/low (in other words a logic analyser).

Am I right @zChris ?

Yes thats what it seems like and how i interpreted it.
zChris
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Re: Problem with H4 not booting (zChris's board)

Post by zChris »

This is the software im using https://www.saleae.com/downloads/

And this is the settings :

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czietz
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Re: Problem with H4 not booting (zChris's board)

Post by czietz »

Be aware that your Logic 4 has an analog bandwidth of 600 kHz. Yes, kilohertz. Anything toggling faster than that (on the analog channel) will be smoothed. It's not really a replacement for a scope.
zChris
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Re: Problem with H4 not booting (zChris's board)

Post by zChris »

czietz wrote: Sun Aug 22, 2021 1:37 pm Be aware that your Logic 4 has an analog bandwidth of 600 kHz. Yes, kilohertz. Anything toggling faster than that (on the analog channel) will be smoothed. It's not really a replacement for a scope.
I see, so i should ignore the analogue channel ? Is the digital channel more reliable then?
czietz
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Re: Problem with H4 not booting (zChris's board)

Post by czietz »

zChris wrote: Sun Aug 22, 2021 1:39 pm I see, so i should ignore the analogue channel ? Is the digital channel more reliable then?
I wouldn't want to call it "more reliable", it's just -- given your logic analyzer's very limited analog BW -- the digital channel is better suited to the task.
zChris
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Re: Problem with H4 not booting (zChris's board)

Post by zChris »

Hello,

I have done some testing and this is were i am at now.

Measured all the adress lines and datalines without a ROM, with A12 "patch", and no decoder. I had the trigger on AS and recorded 500ms after it found a trigger. To trigger i held the reset, started the measurment and then released the reset button. This is the results. There was 5 AS low.

Adressline 1 to RIGHT.
AS 1: 00000000000000000000000 LDS:0 UDS:0
AS 2: 10000000000000000000000 LDS:0 UDS:0
AS 3: 01000000000000000000000 LDS:0 UDS:0
AS 4: 11000000000000000000000 LDS:0 UDS:0
AS 5: 11111111111111111111111 LDS:1 UDS:1


Dataline 1 to RIGHT
AS 1: 1111111111111111
AS 2: 1111111111111111
AS 3: 1111111111111111
AS 4: 1111111111111111
AS 5: 1111111111111111


Then i did the same but with a ROM in (which i do not know it was 2.06 or EmuTOS).

Adressline 1 to RIGHT.
AS 1: 00000000000000000000000 LDS:0 UDS:0
AS 2: 10000000000000000000000 LDS:0 UDS:0
AS 3: 01000000000000000000000 LDS:0 UDS:0
AS 4: 11000000000000000000000 LDS:0 UDS:0
AS 5: 00010000000010000110111 LDS:0 UDS:0


Dataline 1 to RIGHT
AS 1: 1110000000000100
AS 2: 0101010000000110
AS 3: 00111101001111?0
AS 4: 000000010000?1?0
AS 5: 111111111111111?

The reason there is questionmarks is becouse the dataline was both values during the duration of AS low. See picture at the bottom. Also on the last AS low on the test WITH ROM it was low for about 8.333us before going high. This happened only on the test when ROM was inserted.

On a sidenote. I dont know if this has any relevance but i thought i might say it just in case. When i measure AS WITH ROM and decoder in place it seems to loop. The weird thing is that the amount of time that an adressline is when its HIGH seems to double each step i take on the adressline.

Adressline 1 has a top thats 1us that loops. When i measure Adressline 2 it has a top thats 2us that loops. A3 has 4us. A4 has 8us and so on. So 23 has over a second as high.

/zChris

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exxos
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Re: Problem with H4 not booting (zChris's board)

Post by exxos »

I would suggest you use a TOS104 ROM and verify you have the right bank selected else your data may be wrong otherwise..and for sure GLUE will not decode TOS206 or 256k EMUTOS.
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
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Re: Problem with H4 not booting (zChris's board)

Post by troed »

zChris - I have a dual 1.02/1.04 TOS for H4 you can have.

/Troed
zChris
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Re: Problem with H4 not booting (zChris's board)

Post by zChris »

troed wrote: Mon Aug 23, 2021 11:43 am zChris - I have a dual 1.02/1.04 TOS for H4 you can have.

/Troed
Thanks. But i have the same writer as you TL866+ and thanks to your page ive gotten it to read AT27C4096. So if you just could send over the bin it would great.
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Re: Problem with H4 not booting (zChris's board)

Post by exxos »

If you can read the ROM then just post the first few lines of hex codes from it..
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
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