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Author Topic: Internal RTC and 512KB Flash-ROM for Saint's memory expansions (Read 3933 times)

Offline gflorez

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Re: Internal RTC and 512KB Flash-ROM for Saint's memory expansions
« Reply #30 on: 2017.February.11. 23:58:51 »
Please Zozo, can you check if the solder points have been correctly selected?
« Last Edit: 2017.February.12. 00:03:49 by gflorez »

Offline Zozosoft

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Re: Internal RTC and 512KB Flash-ROM for Saint's memory expansions
« Reply #31 on: 2017.February.12. 07:20:22 »
The /Reset are wrong, it is the /INT.

Offline Zozosoft

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Re: Internal RTC and 512KB Flash-ROM for Saint's memory expansions
« Reply #32 on: 2017.February.12. 07:22:15 »
RTC Pin1 corrected?

Offline gflorez

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Re: Internal RTC and 512KB Flash-ROM for Saint's memory expansions
« Reply #33 on: 2017.February.12. 11:59:02 »
The /Reset are wrong, it is the /INT.

Ok, disconnected. It is not present on the original RTC board.

RTC Pin1 corrected?


The problem is, when I connect /RD, the EP starts to do odd things. It hangs at cold reset on the SD partitions screen, but only in 10Mhz, so I can reach the flashing letters screen on 4Mhz and then switch to Turbo speed. Also, once in Basic, loading SymbOS on 10Mhz also hangs. I have to switch to 4Mhz, and once loaded, again switch to 10Mhz. But then the mouse wouldn't work on Turbo speed.(we have to talk to Prodatron about that issue...)
 
On this situation, when pin 1 of RTC is connected to +5v(Motorola mode), at cold reset, the SD Reader hangs on the two speeds.

Sometimes on 4Mhz, pressing reset, it jumps to the clock, and other reset makes it jump to the SD partitions screen. But only sometimes.

I think I better will wait for Pear to make his own tests.
« Last Edit: 2017.February.12. 12:02:35 by gflorez »

Offline gflorez

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Re: Internal RTC and 512KB Flash-ROM for Saint's memory expansions
« Reply #34 on: 2017.February.16. 13:51:10 »
Ok, disconnected. It is not present on the original RTC board.

I said it very fast... of course /Reset is used on the original project. A 4,7 nF condenser and a 1KOhm resistance give a short GND impulse at power-on. I will try it while other better way is found...

Offline gflorez

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Re: Internal RTC and 512KB Flash-ROM for Saint's memory expansions
« Reply #35 on: 2017.February.17. 11:26:04 »
Even easier, /RESET can go directly to Vcc:


Offline Povi

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Re: Internal Real Time Clock
« Reply #36 on: 2019.March.27. 14:46:12 »
Stripes cut.
What kint of tool do you use to cut the stripes?
*** Speicherplatz zu klein

Offline gflorez

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Re: Internal RTC and 512KB Flash-ROM for Saint's memory expansions
« Reply #37 on: 2019.March.27. 15:04:01 »
You do mean to cut cooper tracks on a circuit, don't you?

I use a similar machine than this:



There are little milling tips that can be used as a pencil, with enough precision.