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    Do you seriously know everything about PCs- hardware and software? I'm half-convinced that you do. I think I've yet to see a thread where you don't know the answer :P (maybe I should look harder?)!
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    please reply to 8085 thread.
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    Hi Chuck - Sorry to bother you with a trivial question but I'm sure you can give me an authoritative answer - I've got a pair of Mitsubishi M4853 1/2 height 5.25" drives. I _think_ they are 1.2m drives but I see numerous references to them as 360k drives on the internet. What are they REALLY?

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    chuck smart. chuck lern me gud. thanks for all the C help.
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    Thank you Chuck for all the great explanations!
    One or two sentence of verbal info is a tremendous
    boost for learning a lot of stuff on my own....ziloo
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About Chuck(G)

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About Chuck(G)
Pacific Northwest, USA


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February 4th, 2013 05:22 PM
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January 11th, 2007
View Chuck(G)'s Blog

Recent Entries

GoTek Floppy Emulator, Part III - Try to crack the nut, first try

by Chuck(G) on January 16th, 2013 at 11:23 PM
So what's in the firmware for this thing? I can guess, based on the operation--and having done one myself, but it'd be nice to get the firmware from the unit itself.

So, there's that header near the power pins that I was talking about. I've identified the connections to the MCU USART and noted from that there's a serial boot utility that's present in the chip. All that's needed is a level converter for 3.3V logic to RS232C and a terminal emulator running on a PC (I really like

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Updated January 16th, 2013 at 11:37 PM by Chuck(G)


GoTek Floppy Emulator, Part II - Operation

by Chuck(G) on January 7th, 2013 at 05:01 PM
Okay, time to test this thing and see what's up.

As mentioned earlier, this thing comes with a mini-CD--but don't expect much. You get English and Chinese versions of the somewhat cryptic manual and a couple of software programs in RAR archives.

No installation routines; you have to figure that out all by yourself. No wonder they don't sell many of these.

The format is fixed at 18 512-byte sectors per track on 80 tracks, with sectors numbered from 1 to

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GoTek 1.44M 3.5" Floppy Emulator Tear-down

by Chuck(G) on January 7th, 2013 at 04:29 PM
On a whim, I picked up a GoTek 3.5" 1.44M floppy emulator from eBay for just under USD$29 shipped.

It arrived in a padded mailing envelope with a "China Post" shipping label. Inside, inside of a plastic bag was a "mini" CD and the GoTek unit with a couple of mounting screws.

Here's a top view of the GoTek next to a traditional (NEC) 3.5" 1.44M drive:

Attachment 11542

Here's what the front looks

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LCD's and Backlights?

by Chuck(G) on October 16th, 2012 at 09:51 AM
Quote Originally Posted by lyonadmiral View Post
Hi Guys,
I think I'm going to take a whack at replacing the inverter. It is only $5 bucks shipped so I think I'll do that first. The laptop isn't mission critical, so if I break it, it's okay.
Be careful if the thing comes with a plug with wires attached--one of mine was shipped with a plug with red = ground and black = +12, so double-check the documentation before you solder!

PC-6300 and a Future Domain TMC-850M SCSI Controller, locking up the system

by Chuck(G) on September 9th, 2012 at 09:22 AM
There's probably a better place to put this post, but since it came up...

I've located the booklet--actually about 20 pages (AT&T pub 999-300-3091S) that gives instructions for upgrading to the 1.43 BIOS. It came with 2 EPROMs and 1 PAL, identified as "PAL 90" and as a "memory decoder PAL". It replaces PAL49 at position 2P on the motherboard.

There's some additional information regarding switches and disks in the booklet as well. In particular,

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