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
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
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:
Here's what the front looks
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,