-- Control reset with write of '7BAX' to C0-DF
-- 7BAC enters reset, 7BAD exits it

-- Control bank with wite of 4BAX
-- 4BA0 is "For BAnk 0", 4BA1 is for bank 1

-- Control HPI access on write of '400X' to C0-DF
-- 4000 - Flash read/write mode
*- 4001 - Change - Flash read-only mode  (was 'lock mode, disable all bus writes', same effect?)
*- 4002 - New - Reserved (Actually works like 6MB read/write, only writes to upper 2MB fail)
*- 4003 - New - Flash read-only mode, 6MB mapped, no EZ-HOST read access
-- 4004 - HPI read/write (A1-0=00)
-- 4005 - HPI mailbox read/write (A1-0=01)
-- 4006 - HPI boot mode (A10=10) -- RD/WR are held low
-- 4007 - HPI status read (A10=11)

