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Re: MMC/SD for older devices

From Paul Stewart <phorefaux@gmail.com>
Newsgroups comp.sys.acorn.hardware
Subject Re: MMC/SD for older devices
Date 2025-12-29 16:25 +0000
Organization A noiseless patient Spider
Message-ID <0b64e4925c.Paul@phorefaux> (permalink)
References <1f6859645c.Paul@phorefaux> <Cne*7cVnA@news.chiark.greenend.org.uk> <10bk4b1$jtid$1@druck.eternal-september.org> <047d32665c.Paul@phawfaux.co.uk> <Cne*mDdoA@news.chiark.greenend.org.uk>

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In message <Cne*mDdoA@news.chiark.greenend.org.uk>
          Theo <theom+news@chiark.greenend.org.uk> wrote:

> Paul Stewart <paulstewart@phawfaux.co.uk> wrote:
>> In message <10bk4b1$jtid$1@druck.eternal-september.org>
>>           druck <news@druck.org.uk> wrote:
>> 
>>> On 30/09/2025 12:45, Theo wrote:
>>>> Paul Stewart <phorefaux@gmail.com> wrote:
>>>>> Currently I have a MMC adaptor connected to the 2nd interface
>> 
>>> [snip]
>> 
>>>> If you adapter is really for MMC rather than SD (from the megabytes not
>>>> gigabytes era) then it might not support SD at all, or not SDHC, or some
>>>> arbitrary size limit.  Only thing is to try it.
>> 
>>> I suspect it is an IDE to Compact Flash adapter incorrectly described as
>>> MMC.
>> 
>> Quite right!

> Ah, that changes things!  In that case I'd be looking at an IDE to SATA
> adapter plus a SATA SSD.

> The A9home's IDE implementation was designed by Simtec, and I think the
> Simtec IDE ports (Unipod etc) were designed to a more modern spec and had
> better luck with adapters than the Acorn motherboard ones on Risc PCs.

So I went with an IDE to SD card adaptor from Amazon 
(https://www.amazon.co.uk/dp/B07B66QJHK?ref=ppx_yo2ov_dt_b_fed_asin_title
).  I tried an M.2 to IDE adaptor, but that did not work :(

The SD adaptor appears to be working fine.  Have it attached to the top 
interface on the motherboard.  The bottom interface where the old HDD was 
installed (many moons ago) no longer seems to recognise anything.  But 
can't say I have used it for years as it never recognised my CF adaptor 
anyway, but the top one always did!


-- 
Paul Stewart
Sent from A9home running RISC OS 4.42

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Thread

MMC/SD for older devices Paul Stewart <phorefaux@gmail.com> - 2025-09-30 08:22 +0100
  Re: MMC/SD for older devices Theo <theom+news@chiark.greenend.org.uk> - 2025-09-30 12:45 +0100
    Re: MMC/SD for older devices Stuart <Spambin@argonet.co.uk> - 2025-09-30 21:30 +0000
    Re: MMC/SD for older devices druck <news@druck.org.uk> - 2025-10-01 21:52 +0100
      Re: MMC/SD for older devices Paul Stewart <paulstewart@phawfaux.co.uk> - 2025-10-03 22:29 +0100
        Re: MMC/SD for older devices Theo <theom+news@chiark.greenend.org.uk> - 2025-10-04 09:39 +0100
          Re: MMC/SD for older devices Paul Stewart <phorefaux@gmail.com> - 2025-10-04 21:38 +0100
            Re: MMC/SD for older devices Theo <theom+news@chiark.greenend.org.uk> - 2025-10-05 11:09 +0100
          Re: MMC/SD for older devices Paul Stewart <phorefaux@gmail.com> - 2025-12-29 16:25 +0000

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