Emax

picture xm5ylx.jpg shows Revision 2 board which needs many jumpers  
and traces cut for SCSI to be used. If not skilled with a solder  
iron, should have a technician do the work or emax can be destroyed.

Same picture shows IC 49 with IP344, this would need to be IP356,  
which is hard to get- must be gotten from a dead emax in most cases.  
Binary is not available to make a new one....
IC13 is showing in ix813q.jpg. It is IP349- this would need to be  
IP355, which is also hard to get. Same problem from above- binary not  
available to make a IP355 chip.

Blank slot in m90ztq.jpg is where SCSI 5380 chip goes, but two chips  
above must be correct or just adding this chip is no good.

See Emax SCSI retrofit guide at emulator archive.

So in a nutshell-

a) You do not have IP355 and IP356 so, no SCSI.
b) Your board would have to be modified if you are able to acquire  
IP355 and IP356. Technically skilled persons only should attempt the  
modification.
c) You would also need to get SCSI 5380 chip

Regards,
Ted