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Re: exxos blog - random goings on

Posted: Thu Jul 04, 2019 10:15 pm
by exxos
:cheer: :cheer: :cheer: :cheer: :cheer: :cheer:

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I get back "BFBF" as expected now. Its the ID from both flash chips at once on the bus (flash is 8bit wide so 2 chips used to get 16bit)


So it seems...

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Data being written to the bus isn't actually valid until UDS/LDS go low :roll:

So actually reading the 68K datasheet... :lol:

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So what I did was to delay the flash for a clock cycle, which basically simulates waiting for LDS,UDS going low.. THEN latch the data on the bus.. What would be happening before would be I would just be latching in 1's all the time as nothing would be driving the bus at that point :roll:

Incidentally, I had to use Keli's numbers , so he was right in that I needed to rotate some bits :thumbup:

So we are now talking to the flash :D :D

#bobslaw

Re: exxos blog - random goings on

Posted: Thu Jul 04, 2019 10:27 pm
by Icky
:thumbup: Well done - great work.

I just got one of the other RTC / Flash (Flashy Clock) boards working, sockets and pins are the biggest PITA ever.

Re: exxos blog - random goings on

Posted: Thu Jul 04, 2019 10:39 pm
by PhilC
Icky wrote:
Thu Jul 04, 2019 10:27 pm
:thumbup: Well done - great work.

I just got one of the other RTC / Flash (Flashy Clock) boards working, sockets and pins are the biggest PITA ever.
Welcome to the Socket Haters Society..

Re: exxos blog - random goings on

Posted: Thu Jul 04, 2019 10:41 pm
by Icky
PhilC wrote:
Thu Jul 04, 2019 10:39 pm
Icky wrote:
Thu Jul 04, 2019 10:27 pm
:thumbup: Well done - great work.

I just got one of the other RTC / Flash (Flashy Clock) boards working, sockets and pins are the biggest PITA ever.
Welcome to the Socket Haters Society..
Yep they are evil. Nice avatar PhilC :)

Re: exxos blog - random goings on

Posted: Thu Jul 04, 2019 10:46 pm
by PhilC
Was wondering when youd notice it :lol:

I might see if I can fit that key to one of my STs. Think it came from a Dragon 32, cant remember.

Re: exxos blog - random goings on

Posted: Fri Jul 05, 2019 8:22 am
by Icky
PhilC wrote:
Thu Jul 04, 2019 10:46 pm
I might see if I can fit that key to one of my STs. Think it came from a Dragon 32, cant remember.
Looks like a BBC Micro Break key :)

Re: exxos blog - random goings on

Posted: Fri Jul 05, 2019 10:35 am
by exxos
PhilC wrote:
Thu Jul 04, 2019 10:46 pm
Was wondering when youd notice it :lol:

I might see if I can fit that key to one of my STs. Think it came from a Dragon 32, cant remember.

Needs a hammer above it Phil ;)

Re: exxos blog - random goings on

Posted: Fri Jul 05, 2019 12:29 pm
by PhilC
exxos wrote:
Fri Jul 05, 2019 10:35 am
PhilC wrote:
Thu Jul 04, 2019 10:46 pm
Was wondering when youd notice it :lol:

I might see if I can fit that key to one of my STs. Think it came from a Dragon 32, cant remember.

Needs a hammer above it Phil ;)
I thought about that but it took me 30 mins just to make it small enough to fit in the 12k required

Re: exxos blog - random goings on

Posted: Fri Jul 05, 2019 12:54 pm
by exxos
PhilC wrote:
Fri Jul 05, 2019 12:29 pm
I thought about that but it took me 30 mins just to make it small enough to fit in the 12k required
Oh, I can increase the size to 20k or whatever...

Re: exxos blog - random goings on

Posted: Fri Jul 05, 2019 1:25 pm
by exxos
Done a quick flash routine..

Only writes to address 0, I need to program up the erase sectors routine next to clear the full banks which will hold TOS next.

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