v028

re-arrange the caps & resistors to be easier to solder
ok yes also neater looking

v025

Enlarge the solder pads in the battery clip footprint to completely enclose the metal egdes.
Other minor routing and ground pour adjustments.

v022

• add battery
• support both 14mm and 20mm tsop sram
• switch to commodity machined pins
• don't power anything but the sram on standby
• decoupling

v012

• Internal ram supressed by holding RAMRST high (same as original QUADv4).
• Non-resetting. Bank-selection logic maintained by VMEM along with ram.