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--- On Sat, 5/1/80, Ivan Chaparro wrote:
From: Ivan Chaparro
Subject: Re: [xl7] Re: FLASH SIMM
To: xl7@yahoogroups.com
Received: Saturday, 5 January, 1980, 8:37 AM
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>Im in, just wondering if you could clarify how this
> would integrate into a maxed out command station. Eg: all four roms filled will
> i have to sacrifice one? will it just pop into one of the existing
> slots?
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>----- Original Message -----
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>Sent: Tuesday, February 16, 2010 9:47
>�� AM
>Subject: [xl7] Re: FLASH SIMM
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>definately in.
--- In xl7@yahoogroups. com, Jack Pratt
>�� wrote:
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> Howdy.
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> I
>�� have created�a schematic for a FLASH SIMM. I can send a copy to anyone
>�� who is sufficiently interested�(rather than posting it to everyone [which
>�� I thought would be bad etiquette]) - so pm me if you want to see it.
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> This FLASH SIMM is not the same as DRAM SIMM mentioned previously,
>�� but has some similar features. The intention is to have two 1Gb FLASH devices
>�� populated (total of 256MB FLASH) which would allow as many as seven 32+4MB
>�� images [32MB = wave memory, 4MB preset memory].
>
> What The SIMM
>�� is does mirrors�up to�four slots - it is actually in one slot but
>�� can respond to requests for any of the slots, but you can turn 'off' that
>�� response so you can put a physical ROM (or other FLASH) in that slot. Of cours
>�� that only accounts for 4 ROM images, the other may be accessed by either a
>�� switch or possibly in the future the OS could be modified so that there would
>� be a menu item that allows the user to select which�image appears in any
>�� given slot. The SIMM has 4 footprints for FLASH devices and if Numonyx every
>�� release a 2Gb part then the�SIMM could support 1GB of FLASH or 28 images.
>�� I'm not planning on altering the OS�in the near future so don't hold
>�� your breath.
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> Unfortunately this FLASH SIMM will probably not
>�� be programmable in the old way [Ultra for wave memory, Proteus for preset
>�� memory] so I need to also produce another board to read and write the board.
>�� This solution would be cheaper than buying an Ultra sampler but it wouldn't be
>�� a sampler!
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> In order to proceed I need to know if anyone is
>�� interested in this SIMM. Cost would be about USD150 for the SIMM, and about
>�� USD125 for the programmer. Not sure on the exact prices because it will depend
>� on the PCB manufacture cost, but I figure I need to sell about 20 of them to
>�� make it worth while. Not asking for money, but�just a show of
>�� hands.
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> Let me know what you think.
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