exxos blog - random goings on

[exxos]

yay.jpg (64.31 KiB) Viewed 792 times

tab.jpg (29.07 KiB) Viewed 792 times

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...

68kread.png (182.07 KiB) Viewed 792 times

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

So actually reading the 68K datasheet...

grrr.jpg (106.74 KiB) Viewed 792 times

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

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

So we are now talking to the flash

#bobslaw

[Icky]

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.

[PhilC]

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..

[Icky]

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

[PhilC]

Was wondering when youd notice it

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

[Icky]

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

[exxos]

Was wondering when youd notice it

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

[PhilC]

Was wondering when youd notice it

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

[exxos]

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...

[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.

f.jpg (40.12 KiB) Viewed 742 times