I am a lucky owner of a Yaesu FT1000D since 1992 - it is still my best rig ever !
But, when I wanted to use the transceiver with CAT (computer aided tuning), I could not get it working. Only MIXW32 would communicate correctly - I had to specify FT1000m in the setup.
I looked at the data transfer between PC and FT1000 using a RS-232 Datascope and found, that the FT1000, when asked by the PC for a VFO-frequency, responded and added the content of the 100 memory places. This complete message was 1636 Bytes long and took about 3 seconds to transfer. Because there is no protocol between the two systems, the PC did not wait for the end of the message. The systems were never in sync.
Searching for a solution, I found the Yahoo-group FT1000D and registered. There I found the friendly support and the firmware upgrade file: FT-1000-V6.bin (timestamp: 1991/11/08
A ham-friend produced a new eprom (27C256). It must be mounted on the Control Unit Board (Q 5003 TMS27C256-15JL).
Since I published this description, I have had several requests for the bin-file or for eproms. So, if you have no access to an eprom-burner, I can ship you an eprom. I need $25 to cover my expenses. I may be out of stock for a week or two. Give me a mail to hb9bnk<at>uska.ch to discuss details.
And here is, how I replaced the eprom