Cheetah Cub board

From: Tony Duell <ard_at_p850ug1.demon.co.uk>
Date: Wed Jun 9 18:33:04 2004

>
> The _chips_ are 256K by 1 bit. You feed an 18 bit address into

Confusing correction (for the real hardware hackers here). These DRAMs
take the address in 2 halves of 9 bits each. You give the chip 9 bits of
the address, then the other 9 bits, and finally read/write 1 bit of data.

> one chip and you get one data bit out. 9 chips form a bank with
> 8 data bits plus a parity bit.

Correct

-tony
Received on Wed Jun 09 2004 - 18:33:04 BST