RS232?

Modern, Memotech inspired, hardware projects
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JonB
Posts: 116
Joined: 08 Nov 2013 11:16

RS232?

Post by JonB »

Hi mateys

I have MTX512 / ReMemorizer and MagROM (Not really used it yet, but will, honest, Dave!). I would like to add one or more serial ports to the machine for Kermit file transfer under CP/M. Anyone done this, or must I recreate the Memotech addon?

Cheers
JonB
stephen_usher
Posts: 220
Joined: 27 Nov 2016 19:58

Re: RS232?

Post by stephen_usher »

Given that the schematics and GAL code are freely available, recreating the original is probably the simplest method.
Martin A
Posts: 477
Joined: 09 Nov 2013 21:03

Re: RS232?

Post by Martin A »

I would be tempted to use a Z80 SIO/0 and one or more level shifters from the MAX232 family rather than replicate the original design the old Z80 DART and the MC1488/1489.

For the MTX plus I put the SIO/0 and a RS232 to USB adaptor on the I/O baord. As to how well that works it's anyone's guess as I've not actually got any software that uses the serial port!
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1024MAK
Posts: 644
Joined: 24 Dec 2012 03:01
Location: Looking forward to summer, in Somerset, UK

Re: RS232?

Post by 1024MAK »

Are you actually going to need or use RS232 +12V / -12V levels, or are you using a TTL logic level RS232 to USB device?

Mark
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