RS232 is actually +/- 12V! My recollection is that the E3 runs at 0V/5V (I described it as TTL back in 2003). A 3.3V serial converter might work, I couldn't say. On Wed, 3 Apr 2019 at 20:52 Nick Griffin <[email protected]> wrote:
> On your site.. > “In order to talk to the E2, you need the appropriate cable. Irritatingly, > while the E2 has a serial port, it runs at TTL line levels not RS232 > levels. This means that if you're going to connect it to a PC, you need a > line level converter” > > So I can use a CPC 2102 USB to TTL serial converter because its a line > level converter… 😊 and its RX line is 3.3 volt, this can’t take 5 > volts because it could blow the UART0…? > > Spanner.. > > *From:* David Given <[email protected]> > *Sent:* Wednesday, 3 April 2019 18:52 > *To:* Discussion of the Amstrad E3 emailer hardware/software > <[email protected]> > > I've got a tool which speaks the PBL protocol and will let you read and > write the flash: http://cowlark.com/amstrad/ > <https://nam04.safelinks.protection.outlook.com/?url=http://cowlark.com/amstrad/&data=02%7c01%7c%7c0ff5e97479d549450d8208d6b85d225c%7c84df9e7fe9f640afb435aaaaaaaaaaaa%7c1%7c0%7c636899107478251836&sdata=1rV57mYpj1Hs38RqCM3fqnEhqzLh5F3vWhwQWqW9AuM%3D&reserved=0> > > > It's also got details of the serial pinout. > > On Wed, 3 Apr 2019 at 19:07 Nick Griffin <[email protected]> wrote: > >> As far as I know when you connect this to serial you don’t get a console, >> like if you connect TheC64 Mini to Putty using a CPC 2102 USB to TTL serial >> convertor, you can log on with your root user and password so you can add >> files, change games and edit files and that ,TheC64 Mini uses Uboot to boot >> up with not PBL so it must be the PBL that's stopping the console coming up >> so if we could hack the PBL (Primary Boot Loader) and keep the firmware on >> the NAND so its still boots up with Amstrad E3 logo and that, we need to >> see the system files and see what can be changed. PBL is on the NOR Flash >> and the Kernel and System is on the NAND Flash. I don’t know anything about >> PBL so we need someone who does.it >> <https://nam04.safelinks.protection.outlook.com/?url=http://does.it&data=02%7c01%7c%7c0ff5e97479d549450d8208d6b85d225c%7c84df9e7fe9f640afb435aaaaaaaaaaaa%7c1%7c0%7c636899107478261846&sdata=cKbkujL//PuqTj5W5Dtacrb2GoLLKmqXMA81FjPrIDE%3D&reserved=0> >> all most works the same as TheC64 Mini,(Its a small Commodore 64, Mini >> Console, its here.. https://www.c64-wiki.com/wiki/THEC64Mini >> <https://nam04.safelinks.protection.outlook.com/?url=https://www.c64-wiki.com/wiki/THEC64Mini&data=02%7c01%7c%7c0ff5e97479d549450d8208d6b85d225c%7c84df9e7fe9f640afb435aaaaaaaaaaaa%7c1%7c0%7c636899107478271851&sdata=bd45fNPeGF/ASugX1AaQYewd6OIAxHko0Z9iDRsRAbI%3D&reserved=0>) >> The mini has 2 partitions, One for Uboot and other for the Kernel and >> System. but only has one chip, NAND Flash, its made by Toshiba too.. 😊. >> Amstrad E3 has 2 chips NOR and NAND Flash. and is using a different Boot >> loader. >> >> Oh.. Can I use my CPC 2102 USB to TTL serial converter to connect to the >> serial on the E3..? this is a pic of it here.. >> *https://sc02.alicdn.com/kf/HTB11eb9PFXXXXcLaXXXq6xXFXXXd/CP2102-USB-2-0-to-TTL-UART.jpg_350x350.jpg* >> <https://nam04.safelinks.protection.outlook.com/?url=https://sc02.alicdn.com/kf/HTB11eb9PFXXXXcLaXXXq6xXFXXXd/CP2102-USB-2-0-to-TTL-UART.jpg_350x350.jpg&data=02%7c01%7c%7c0ff5e97479d549450d8208d6b85d225c%7c84df9e7fe9f640afb435aaaaaaaaaaaa%7c1%7c0%7c636899107478281862&sdata=P8EsfPfMK3uzbtWcuKbOcwf1gTPEVk3IFhNWzhTzLIk%3D&reserved=0> >> I >> have used it on my TheC64 Mini and my Gotek Drive. >> >> Spanner.. >> _______________________________________________ >> e3-hacking mailing list >> [email protected] >> https://www.earth.li/mailman/listinfo/e3-hacking >> <https://nam04.safelinks.protection.outlook.com/?url=https://www.earth.li/mailman/listinfo/e3-hacking&data=02%7c01%7c%7c0ff5e97479d549450d8208d6b85d225c%7c84df9e7fe9f640afb435aaaaaaaaaaaa%7c1%7c0%7c636899107478291867&sdata=1y6cn51sOKEHHpvkAfK37Sm4yBmS3QNSEadRK1KH6dY%3D&reserved=0> >> > _______________________________________________ > e3-hacking mailing list > [email protected] > https://www.earth.li/mailman/listinfo/e3-hacking >
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