NEO-AES4-1 board



Seems to be the sixth and latest board revision.

Some (all ?) units appear to be heavily shielded with a metal cover and conductive coating on the plastic shell.

=Differences with the NEO-AES3-6 board=


 * The power supply circuit was (finally) moved next to the power connector.
 * Most through-hole chips were replaced by their surface mount versions.
 * The PLCC version of the 68k CPU was used. Also tiny Z80.
 * The SP1 ROM is an OTP part.
 * Resistor networks were added on bus lines, maybe as an attempt to reduce radiated noise.
 * TC9018P composite sync generator.
 * /NEW-SYNC jumper.
 * /RBNKB jumper.