Hard to find firmware, now it's here.
To write the firmware, use the pictures below.
Diagnostics of the chip 789101A (figure below).
Since questions were asked how SH7058 was read, here is a photo and screenshot.
The machine is working, the process is complete.
hi, could you send pinout for read?
Fgtech Renesas: flat cable: 8-orange-/audrst 9-red-vcc-audmd 7-yellow-audata0 6-green-audata1 4-violet-audata2 2-white-audata3 1-black-audck 10-brown-/audsync 3-grey-GND big cable: white-rcv(TXD1/pin165) violet-transmit(RXD1/pin166)
Thank you, evrything works.