https://www.vogonswiki.com/index.php?action=history&feed=atom&title=Gemlight_PTI237WGemlight PTI237W - Revision history2026-04-29T18:41:30ZRevision history for this page on the wikiMediaWiki 1.30.2https://www.vogonswiki.com/index.php?title=Gemlight_PTI237W&diff=3038&oldid=prevMalvineous: Basic info2016-11-27T00:48:44Z<p>Basic info</p>
<p><b>New page</b></p><div>{{Device Infobox/Begin<br />
| Bus type = ISA<br />
| Bus width = 16-bit<br />
| Bus speed = 8 MHz<br />
| 8-bit ISA compatible = ?<br />
| Manufacturer = Gemlight Computer Ltd<br />
| Chipset = Winbond W83877F <!-- assumed from EXT2FDD capability --><br />
| Compatible with = [[Has compatibility::IDE]], [[Has compatibility::PC Floppy]], [[Has compatibility::RS232]], [[Has compatibility::LPT]], [[Has compatibility::Gameport]]<br />
| Connectors = [[Has connector::RS232/DB9]], [[Has connector::LPT]] <!-- Other connectors aren't shipped with the card so aren't included --><br />
| Requires -5VDC = No<br />
| Requires -12VDC = Yes<br />
| Config = [[Config method::Jumpers]]<br />
}}<br />
{{Device Infobox/IO<br />
| Serial ports = 2<br />
| UART =<br />
| COM1 = Yes<br />
| COM2 = Yes<br />
| COM3 = Yes<br />
| COM4 = Yes<br />
| Parallel ports = 1<br />
| Bi-dir =<br />
| ECP = Yes<br />
| EPP = Yes<br />
| LPT1 = Yes<br />
| LPT2 = Yes<br />
| LPT3 = Yes<br />
| LPT4 = No<br />
| Game ports = 1<br />
}}<br />
{{Device Infobox/Floppy Controller<br />
| Floppy buses = 1<br />
| Drives per bus = 2<br />
| Secondary = Yes<br />
| ROM type = None<br />
}}<br />
{{Device Infobox/IDE Controller<br />
| IDE buses = 2<br />
| Primary = Yes<br />
| Secondary = Yes<br />
| Tertiary = No<br />
| Quaternary = No<br />
| ROM type = None<br />
}}<br />
{{Device Infobox/End<br />
| Driver = N/A<br />
}}<br />
<br />
The '''Gemlight PTI237W''' is the OEM of one version of the [[DTC2280]]. The card is notable in that it supports two floppy drives connected to the parallel port via a passive cable adapter.<br />
<br />
== External floppy support ==<br />
<br />
A passive cable can be built to access one or two floppy drives externally via the parallel port. This mode changes the pin assignments on the DB-25 connector to those of a proprietary Winbond designation - it is not an IEEE1284 standard parallel port when operating in this mode.<br />
<br />
The pin assignments for the conversion cable are shown in the image gallery below, taken from the W83877F datasheet.<br />
<br />
Although the datasheet mentions support for up to four floppy drives, it appears that only two can be used. In EXTFDD mode (not supported by this card) the drive 0 is on the external connector and drive 1 is on the DB-25 port while in EXT2FDD mode (supported by this card) both drives 0 and 1 are on the DB-25 port and the internal floppy connector appears to be unused.<br />
<br />
== Additional photos ==<br />
<br />
<gallery mode="packed"><br />
Image:Gemlight PTI237W underside.jpg|Underside<br />
Image:Winbond EXT2FDD wiring diagram.png|EXT2FDD wiring diagram<br />
</gallery><br />
<br />
== Related links ==<br />
<br />
* [https://fccid.io/KDDPTI237W FCC entry]</div>Malvineous