Date: Wed, 12 Nov 2003 08:16:54 +0800 From: Raymond <[EMAIL PROTECTED]> Subject: Re: [LIB] USB
At 03:16 PM 11/11/2003 -0800, you wrote:
Date: Tue, 11 Nov 2003 14:59:45 -0800 From: PhotoEngineering <[EMAIL PROTECTED]> Subject: USB
I was looking at the board specs of the Libretto 100/110CT and according to Toshiba the USB controller is acuallly in the I/O GA. So a USB jack be simply wired into the CPU board it seems.
I had a look at this a while back when I was bringing the PS/2 port lines out from the motherboard PS/2 controller (details of which are available at www.raybot.net in case anyone was remotely interested!), yes the USB controller is on the motherboard but the USB driver chip (and, from my limited experience with USB driver chips, at least some of the smarts for current control, etc.) sit in the EPR ... I was going to try doing this once I got a few spare moments to read up on the chips involved but if you're more familiar with the way USB driver circuits work I'll leave it to you! :-)
A somewhat easier mod I was also thinking of doing was bringing out the RS-232 port (the raw signals are there, all it needs is the RS-232 line driver and a few capacitors, both of which I actually understand :-) ) ...
As for a modem on the audio chip, are you sure that audio chip has an inbuilt modem and you're not looking a modem line input (which is probably already routed to a line on the PCMCIA port for connection to a PCMCIA modem)? The data sheet I have for that chip mentions its multipurpose I/O line can be configured as a modem interface (or a 16-bit address decode, EEPROM interface, ZV port interface, CPU/DAC interface or IDE CD-ROM interface) and has 3 signals (chip select, interrupt and analog input) but I don't think it actually has a hardware modem onboard.
- Raymond
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