MOD-68, MOD-69, SYM-1/68, SYM-1/69
The MOD-69 and MOD-68 replace the 6502 with a Motorola 6809 or 6802 CPU on an adaptor board and the Monitor is replaced with a new ROM with a new Supermon.
There were also SYM-1’s available with the Motorola processor 6802 : SYM-1/68 and 6809: SYM-1/69.
|SYM-1/69 SYM-1 supplement manual
ROM of MOD 69, 2-9002-129 MOD 69 Hi 2-9002-12 MOD 69 Lo
PROM 82S129 of MOD 69 (2103 marked IC in photos below