"status" field means return codes from disk bios.
Real disk bios return codes for PC-88 and PC-98 is here.
00h , normal
and everything else is an error code or notification.
10h , the data has DDAM
30h , warning 'try to access over final track'
40h , Fault signal from FDD,Recalibrate error
50h , time out error
60h , FDD not ready
70h , detected write protected
a0h , ID CRC error
b0h , Data CRC error
c0h , cannot find specified sector in the track
d0h , cannot find specified cylinder
e0h , cannot find Address Mark
f0h , cannot find DAM or DDAM when reading datas.
so i have never seen any status codes except for 00h or b0h.
'cause D88 images is just sector dumped image.
i wish this information may helps you.
and i'm interesting this topic you wrote in 'Using 1 HxC for 2 floppy drives on a NEC PC-8801'
If someone could port this on PC88 this can be interesting :
PC-88 is z80 cpu,64KB memory and 640x200 line display.
do you think it is possible to port this software to PC-88? poritng fat32 drivers to PC-88 ?
can i get source codes any other PCs ?