tequilaboy

Since the original post on this topic did not get much attention, I decided to start a dedicated thread.

1986 ($32) bins are missing a few lines in the serial data initialization routine intended to disable transmit through sxr. This makes scanning at 8192 baud troublesome compared to the later 87-88 ($32B) and 89 ($6E) bins.

The corrected (missing) bytes are shown in red in the disassembly excerpt below:

ldaa L4008
ldaa #0x27
staa L4007
ldaa L4009
ldd L3FFC
orab #0x04
jsr LF3B5
std L3FFC
ldaa L4004
anda #0xF7
staa L4004
rts

With the indicated changes along with updated dependencies, my updated bin will respond to the standard mode 1 request (in 10k aldl mode) and transmit 8192 baud data.

Note: This bin has only been briefly tested in my own 88 4+3 car to check connectivity and data flow.

Hopefully someone is willing to test it in an actual 86 4+3 car. Timing should be safe for iron heads, but may be a bit lazy for aluminum. Use at your own risk.

Please post any resulting datalogs and feedback here.

If there is sufficient interest, I may provide equivalent versions of BUA, BUC, or any other popular 86 bins.