Epson smd349 floppy

1,44mb

it's not locksum ,its Check SUM or CRC errors.
what OP, are you running,? windows what. i guess.

the CMOS battery just died.
install a new one.
all puters this old do that, the battery is good for 7-10 years,
and all fail.
DO NOT FLASH your BIOS, fix the real problem first

when the battery dies, all our bios setting were lost
including boot device, and order
fix battery
then go into BIOS and put back boot order.

Your TEAC FDD (floppy disk drive) is a Tri-mode device (720 KB, 1.2 MB, and 1.44MB)

The "235" part of the model number indicates the drive's form factor (size) is 3.5 inches.
The "HG" part of the model number indicates that the FDD is a Tri-mode device, with the 3 modes
given above.

The manufacturer notes that it has no jumpers, but every FDD I've ever seen has jumpers for
bus master/slave selection. Either master or slave will work.

Here's the manufacturer's web site URL for your TEAC floppy disk drive:
http://www.teac.com/DSPD/support/floppy_drives/fd235hg_id_your_drive.htm

Here's the info on the NEC FD 1137C drive:
--------------------------------------------------------------
Enclosure Type Internal
Interface Floppy (IDC)
Platform: PC
Technical Features Capacity 1.44 MB,2.8MB,360MB,720KB,1MB,640KB
Minimum System Requirements:
Operating System Microsoft DOS • Microsoft Windows 3.1 • Microsoft Windows 95 • Microsoft Windows NT
Form Factor: 3.5" floppy disk drive

Here's the best info I found on your NEC FD 1137C Floppy disk drive:
http://www.aliexpress.com/fm-store/602209/210081532-394871196/NEC1137C-DATE1992-floppy-Adaptive-720K-1-44M-120M-Capacity-120M-40PIN-Interface-3PIN-Jumper-FD1137C-NEC1137C.html

No need for one - this unit is very easy to use: make sure no floppy is in the unit and plug it in any USB slot on a pc; a icon saying that new hardware has been detected will appear in the bottom right side , next to the clock; when all the messages coming from there have stopped (less than 30 seconds) it means that the unit is installed and ready to be used; to use it put a floppy in it and to access it just open My Computer and the floppy will be there, like it was in the old days.

The replacement cost of these is prohibitive often greater than $200.

You should try to clean the heads in your drive and see if you can spot a mechanical problem. Clean the heads carefully with 91% isoprophyl alcohol and Tube Gauze on a tongue depressor. Be very careful.

This sounds like it MIGHT be a floppy drive problem rather than a full memory... REMEMBER to ONLY try recording a file no bigger than what the floppy will hold which is 720Kb.

NOTE: The disks used in this are not the COMMON 3.5 inch floppies, but the older 2DD 720K floppies. They have only one hole on corners where the new 1.44 Mb ones have two holes.

To USE the 1.44 Mb flopies do this: Use an opaque tape to cover the hole that does NOT have the write protect slider. THEN most omportantly DEGAUSS the disk with a degausser. THEN Reformat the disk in the CVP 65.

The pre-formatted 1.44 disk when formated at the 720Kb used by the CVP 65 will have ARTIFACTS between tracks since the higher density also have half the track spacing and the formatting doesn't always clean enough width leaving artifacts between the tracks when formatted as 720Kb These ARTIFACTS can cause trouble.

The 720Kb disks are ESSENTIALLY unavailable anymore.

Reverse the data ribbon direction in floppy side (data cables pink color side should be plugged opposite to power cables color side)

Check your Bios Settings.

Most floppy disks that you will still be able to find are 1.44MB DSDD disks, which a 720k drive will not be able to read. Check the capacity rating of the disks. Also the 720k drive has got to be at least 20+ years old, and the read/write heads may simply not work anymore. 1.44MB flopyy drives are literally a dime a dozen, you can probably pick one up at your local thrift store or electronics recycler for less than the bus fare it took to get there.

ibm ps 1 computer uses older type floppies either 360kb or 720kb these cannot alway be read by modern computers also to copy these you have to use the same capacity disks most disks are the HD versions 1.44MB. the older drives. If i remember right you can tell the 1.44mb disks by an extra hole on the disk.