[NTLK] NewtonTalk Digest, Vol 99, Issue 13

[Bertrand LAMBERT]

I am interested in purchasing 2 cards.

Bertrand

> Le 17 mars 2022 à 15:19, Perley Mears <perley at mears.us> a écrit :
> 
> Matthias,
> 
>    I'm on board for buying a couple of these new ROM boards. :-) As Fry on
> Futurama would say "Shut up and take my money?" :-)
> 
> Perley
> 
> Perley Mears
> perley at mears.us
> 
> 
> On Thu, Mar 17, 2022 at 8:26 AM <newtontalk-request at newtontalk.net> wrote:
> 
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>> Today's Topics:
>> 
>>   1. Re: A new ROM board (Matthias Melcher)
>>   2. Re: A new ROM board (DXH)
>>   3. Metamorphosis (NewtonTalk)
>>   4. Re: Metamorphosis (Matthias Melcher)
>>   5. Re: Metamorphosis (Pawel Piotrowski)
>>   6. Re: Metamorphosis (Doug)
>>   7. Re: Metamorphosis (Alan Grassia)
>>   8. Re: A new ROM board (Bertrand LAMBERT)
>>   9. Re: A new ROM board (Sylvain Pilet)
>>  10. Re: Metamorphosis (NewtonTalk)
>>  11. Re: Metamorphosis (Sylvain Pilet)
>>  12. Re: A new ROM board (Matthias Melcher)
>> 
>> 
>> ----------------------------------------------------------------------
>> 
>> Message: 1
>> Date: Wed, 16 Mar 2022 21:17:00 +0100
>> From: Matthias Melcher <m.melcher at robowerk.de>
>> To: newtontalk at newtontalk.net
>> Subject: Re: [NTLK] A new ROM board
>> Message-ID: <C5CBAF03-20AC-4007-8373-CDB1E86931D5 at robowerk.de>
>> Content-Type: text/plain;       charset=us-ascii
>> 
>> 
>> Hi Newts,
>> 
>> 
>> tl;dr : the ROM replacement board works and offers an additional 24MB of
>> ROM-like storage for apps. Currently, the ROMs must be programmed
>> externally, but I am working on a solution to make the boards
>> reprogrammable by anyone.
>> 
>> It would be helpful to know if anyone is interested in buying any of these
>> boards. Target cost is roughly 20 Euros plus shipping.
>> 
>> - Matthias
>> 
>> 
>> 
>> Time for some geek stuff. I'll try to make it understandable for everyone.
>> Sorry for any repeats.
>> 
>> 
>> The replacement ROM Cards that I built for the MP2x00 work better than
>> expected. I am super thrilled that I will be able to offer backup boards,
>> ROM fixes, and Extensions on boards that can be reprogrammed over and over.
>> 
>> The original MP has 8MB of ROM on a removable card. I replaced old-school
>> ROM chips with modern Flash memory. The Newton Operating System can
>> officially manage an additional 8MB block and another 16MB block.
>> 
>> By now, I fully tested adding 8MB of additional packages in that first
>> block. With a dedicated programmer, that can be done now. I am writing
>> software that will enable this feature for everyone.
>> 
>> 8MB on a Newton are a lot of apps. But we have an additional 16MB that can
>> hold even more packages. This is mostly tested, works with the programmer,
>> and will eventually also be programmable by the user.
>> 
>> Both blocks extend your machine's ROM. They can be written with an app,
>> but they do not extend the Flash RAM of your machine.
>> 
>> 
>> So we know how to address 8+8+16MB=32MB of the card. The hardware
>> interface of the card has an additional address pin, which appears very
>> much like an afterthought. It's not used by the OS, but it is very much
>> addressable by the CPU, so we actually have an additional 32MB of memory
>> available. I am not sure if that can be used easily for anything, but it's
>> there nevertheless.
>> 
>> 
>> - Matthias
>> 
>> 
>> 
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>> ------------------------------
>> 
>> End of NewtonTalk Digest, Vol 99, Issue 13
>> ******************************************
>> 
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