Sharp PC-E500 to PC link issues

[fy789]

Hi all,

I bought the RS232C-to-USB cable from tmfg.jp
to facilitate file transfer from PC to Sharp PC-E500.

I follow the instruction on their website to transfer
a file from PC to the E500:

1. First, I connect the cable to the PC and the E500
(Drivers on the PC side are preloaded)

2. Then I set up the E500 port by using
OPEN "9600,N,8,1,A,L,&H1A,N,S":CLOSE

3. Then I put the E500 into RECEIVE mode:
LOAD

However, after the "LOAD" command, the E500
always return "I/O error". Is this ok?
The E500 is supposed to sit there waiting for the
bitstream to come in.

I have read thru quite a few discussions here as well
as a few other places, and there are a lot of info.

(i) logic inversion of 4 flow control signals
(the FTDI chip manufacturer has a configure tool to do this,
but it has not been updated to run on Win10 or Win11).
Is this necessary?

(ii) I assume the FTDI chip will do the voltage level conversion.


BTW, I appreciate if anybody successfully doing this before
can post a cheatsheet to walk thru the steps and the tools
used (TeraTerm, HTerm, PC-E500-Notepad....etc) ?


Thanks!