[Arm-netbook] Huge RAM requirements (was: What do 1, 000 EOMA68-A20 PCBs look like?)

[Paul Boddie]

On Wednesday 12. December 2018 19.19.43 Luke Kenneth Casson Leighton wrote:
>
> On Wed, Dec 12, 2018 at 6:39 PM Paul Boddie <paul at boddie.org.uk> wrote:
> > 
> > Although it's not a 64-bit CPU and is MIPS-based not ARM-based, wasn't the
> > JZ4775 board almost done?
> 
>  pretty much - i just couldn't get beyond u-boot, as i had put a 24mhz
> XTAL in rather than a 48mhz, and i couldn't get the PLLs right to get
> beyond the SPL loader.

Yes, 48MHz seems to be the EXCLK frequency for this particular generation of 
JZ SoCs: the JZ4780 uses that frequency for the CI20. As for the PLLs, the 
clock configuration seems to change from SoC to SoC, but they are probably 
similar, and documentation, kernel and U-Boot support should be out there for 
perusal.

[Dingoo, GCW-Zero, MIPS-based consoles and emulation]

>  ok - well, i've still got 2 of the cards around somewhere, and i can
> order some 48mhz XTALs: i have a heat gun so should be ok to put them
> in.
> 
>  i have no idea what kinds of volumes to expect.

Demand or supply volume? As for demand, it is difficult to say, but I thought 
some reporting of things from the wider world might help you decide what might 
be worthwhile doing in future, especially if most of the work is done.

Paul