[torontocbm] Re: WORKS! SD2IEC Real-Time Clock (RTC)

From: Ben Kayfetz <benkayfetz@xxxxxxxxxxx>
To: "torontocbm@xxxxxxxxxxxxx" <torontocbm@xxxxxxxxxxxxx>
Date: Sat, 20 Nov 2021 05:20:47 +0000

Very cool! Are you bringing it to WOC?

this email was composed and sent from my smartphone. please excuse any errors

Ben Kayfetz
416-831-6339
________________________________
From: torontocbm-bounce@xxxxxxxxxxxxx <torontocbm-bounce@xxxxxxxxxxxxx> on
behalf of Chiron Bramberger <dmarc-noreply@xxxxxxxxxxxxx>
Sent: Friday, November 19, 2021 6:56:19 PM
To: TPUG Mailing List <torontocbm@xxxxxxxxxxxxx>
Subject: [torontocbm] WORKS! SD2IEC Real-Time Clock (RTC)

So I got the real-time clock on the SD2IEC working!

It needs the hardware, battery, and you need to recompile and flash the
firmware. But now it works!

Here’s some pictures:

[cid:39036bae-2584-4951-8846-f11d9c7628d3@lamprd80.prod.outlook.com]
[cid:1eee2fc0-6241-4102-8015-36e5b8a397ef@lamprd80.prod.outlook.com]

[cid:f547d25e-3dc3-4596-ba83-3164f26df3bb@lamprd80.prod.outlook.com]

Sent from my iPhone

On Nov 14, 2021, at 3:32 PM, Chiron Bramberger <dmarc-noreply@xxxxxxxxxxxxx>
wrote:

Has anyone added the real-time clock to their SD2IEC?

I recently added the chip, crystal, pull-up resistors and little capacitors,
and a CR2032. I’ve also tested on the 10.3 firmware it came with as well as
the latest 10.0.0 29 firmware.

However, from what I can tell, it’s only using an internal software clock
that looses its time and date when either the C64 is reset and it’s power
externally from a separate IsB source, or when it is power cycled regardless
of where it’s powered from.

I checked the data sheet for the clock chip and it says it doesn’t need the
little 22 pF caps. I’ve tried with and without and there’s no difference.

I’ve also looked at the clock and data signals between the MCU and the RTC
and there’s nothing happening. Just the 5 volt pull-ups.

Is there a special firmware I need to run? Or compile? Or something?

If anyone has built and tested this and can offer some insight please let me
know.

Thanks in advance! Looking forward to seeing people at WoC!
-Chiron

Sent from my iPhone

Follow-Ups:
- [torontocbm] Re: WORKS! SD2IEC Real-Time Clock (RTC)
  - From: Chiron Bramberger

References:
- [torontocbm] Help: SD2IEC Real-Time Clock (RTC)
  - From: Chiron Bramberger
- [torontocbm] WORKS! SD2IEC Real-Time Clock (RTC)
  - From: Chiron Bramberger

[torontocbm] Re: WORKS! SD2IEC Real-Time Clock (RTC)

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