Re: Memory Expander

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Re: Memory Expander

I decided to use memory banking so the limit to addressable memory is 1GB
(which is pointless).
However I'm not sure if I am going to build this design or an expander at
all.


_____________________________________________________________________
I'm, like, a product, OK, of american, you know, education, all right?
DJ_Ramen@juno.com

On Mon, 9 Mar 1998 15:27:54 -0500 The Pletchers
<bpspcp-travelin@WORLDNET.ATT.NET> writes:
>32 K ?? You'll get nowhere trying to sell that. Like I said, Look at
>others'
>ideas.
>
>At 09:00 AM 3/9/98 -0500, Chris A Brainerd wrote:
>>I'm making it as much for fun as business, and why not make some
>>competition for the EII and EII anyway? Also, I thought the person
>>writing 83 software for EII stopped working on it. I don't know how
>much
>>mine are going to cost, but the current estimated cost on mine is
>$35-$40
>>for 32K including labor and stuff. The memory is pluggable and each
>extra
>>32K will be about $5.
>>Mine will be VERY expandable, its based on a Z80 CPU so a serial
>port,
>>sound capabilities, a display maybe even a floppy drive could be
>added,
>>although their usefulness is debatable. Also, a serial modem could be
>>added.
>>I am planning on using SRAM with backup batteries. To expand, the
>SRAM
>>can be unplugged along with a backup battery. I am still considering
>>using FLASH EEPROM because you wouldn't have to worry about backup
>>batteries, of course that would be slow, and have limited life, not
>to
>>mention a likely bulky power supply to give the 12V necessary to
>write to
>>it.
>>
>>        Chris
>>
>>
>>_____________________________________________________________________
>>I'm, like, a product, OK, of american, you know, education, all
>right?
>>DJ_Ramen@juno.com
>>
>>On Sun, 8 Mar 1998 20:27:53 -0500 The Pletchers
>><bpspcp-travelin@WORLDNET.ATT.NET> writes:
>>>Let him make it on his own if he wants I guess.
>>>
>>>At 03:50 PM 3/8/98 -0700, Grant Stockly wrote:
>>>>Why would you make this when the EII is going to be out by the end
>of
>>>the
>>>>week?  The EIII (link menu transfers) will be in 2 weeks...
>>>>
>>>>Grant
>>>>
>>>>>First of all, look around at the kind of hardware other people are
>>>using to
>>>>>make their own expanders. If you cant think of a price on your
>own,
>>>you'll
>>>>>never make a good businessman (or Ferengi). I would really
>recommend
>>>against
>>>>>any kind of ram because it takes power. EEPROM is probably the
>best
>>>way to
>>>>>go. Look at other ideas from other people. Hmm. anythink over 1 or
>>>two megs
>>>>>is too much if you think about it. Use ASM for the transfers
>>>probably. You
>>>>>dont have to, but it sure beats the link menu.
>>>>>
>>>>>At 04:29 AM 3/9/98 -0500, Chris A Brainerd wrote:
>>>>>>Hey,
>>>>>>I've done lots and lots of research into building a memory
>>>expander. I'm
>>>>>>getting ready to build the prototype (witin a week), but I need
>to
>>>know
>>>>>>what people want.
>>>>>>Specificly how much storage do you want and at what price? Also
>>>would you
>>>>>>want to pay extra to send and recieve with the link menu, or have
>>>it be
>>>>>>cheaper and use an assembly program for transfers. If you have
>any
>>>>>>answers to any of these questions please email me.
>>>>>>BTW: any amount of memory is possible from 0 all the way to 1GB,
>>>believe
>>>>>>it or not. Of course a 1GB expander would be ridiculously huge
>and
>>>>>>expensive (the SRAM chips alone would be $36,250), not to mention
>>>>>>pointless.
>>>>>>
>>>>>>I'm only planning on making 83 compatible software, but if
>there's
>>>anyone
>>>>>>out there who wants to work on making it 82, 85 or 86 compatible
>>>email
>>>>>>me.
>>>>>>
>>>>>>Chris
>>>>>>_____________________________________________________________________
>>>>>>I'm, like, a product, OK, of american, you know, education, all
>>>right?
>>>>>>DJ_Ramen@juno.com
>>>>>>
>>>>>>_____________________________________________________________________
>>>>>>You don't need to buy Internet access to use free Internet
>e-mail.
>>>>>>Get completely free e-mail from Juno at http://www.juno.com
>>>>>>Or call Juno at (800) 654-JUNO [654-5866]
>>>>>>
>>>>>__________________________
>>>>>
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>>>>>__________________________
>>>>>Welcome to the U.S.S. Crew
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>>>__________________________
>>>
>>>What is there to say about silence?
>>>__________________________
>>>Welcome to the U.S.S. Crew
>>>-- http://www.jeffb.home.ml.org/
>>>-- http://www.geocities.com/Area51/Station/1149/
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>>
>>_____________________________________________________________________
>>You don't need to buy Internet access to use free Internet e-mail.
>>Get completely free e-mail from Juno at http://www.juno.com
>>Or call Juno at (800) 654-JUNO [654-5866]
>>
>__________________________
>
>What is there to say about silence?
>__________________________
>Welcome to the U.S.S. Crew
>-- http://www.jeffb.home.ml.org/
>-- http://www.geocities.com/Area51/Station/1149/
>================================================
>ICQ UIN (if you have ICQ)        -- 2097846
>ICQ E-mail Express (if you dont) -- mailto:2097846@wwp.mirabilis.com
>__________________________
>

_____________________________________________________________________
You don't need to buy Internet access to use free Internet e-mail.
Get completely free e-mail from Juno at http://www.juno.com
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