Manufacturer ... Adaptec
Model .......... AHA-1542B
FDC chip ....... DP8473V (1987)
Class .......... ISA
Floppy ......... TEAC FD-55GFR

#####

TESTFDC 1.18 / Mar 07 2012
Copyright 2007-2012 Dave Dunfield - All rights reserved.
BIOS reports drive A: as 1.2M HD, 80-track.
Testing as: 1.2M HD, 80-track

Insert low density media - Press ENTER or ESC to skip:
300k Single-Density: Format Write Verify Ok
300k Double-Density: Format Write Verify Ok
300k Double/128byte: Format Write Verify Ok

Insert high density media - Press ENTER or ESC to skip:
500k Single-Density: Format Write Verify !error (0) NoAdrMark 
500k Double-Density: Format Write Verify Ok
500k Double/128byte: Format Write Verify Ok

Report on FDC capabilities, issued 14/10/2019 11:20:28:

Single-Density at 250 kbps ............................ Not tested
Single-Density at 300 kbps ......................... Passed
Single-Density at 500 kbps ............................ Failed

Double-Density at 250 kbps ............................ Not tested
Double-Density at 300 kbps ......................... Passed
Double-Density at 500 kbps ......................... Passed

Double-Density at 250 kbps / 128 byte sectors ......... Not tested
Double-Density at 300 kbps / 128 byte sectors ...... Passed
Double-Density at 500 kbps / 128 byte sectors ...... Passed

EOF