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1050 US Doubler Speed


Paul Westphal

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True.. Basically, there is no stack, and you can't use ZP-indirect addressing... Keep state in registers and go to it!

 

Definitely the hard way to go around it, but no hardware mods are the way to go if you can!

I posted some info about the 1050 Turbo just about 2 months ago: http://atariage.com/forums/topic/218319-why-single-density-and-then-whey-enhanced-density/page-3?do=findComment&comment=2864878

 

The source code (link at the end of the posting, just get the software_1050_turbo.zip) is a very good and interesting bedtime reading :)

 

so long,

 

Hias

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I hate to be too pragmatic, but isn't that ram chip really cheap and easy to do? ;)

 

I have 1050 Doubler drives (and an Indus "Doubler" -- thanks MrMartain!), and they are fine... just IMO a bit less convenient than the 1050 Happy, but then I'm a dyed-in-the-wool MyDos user, so I know nothing about disk-based Sparta issues. (BTW, no one has mentioned the Super Archiver which is functionally a Doubler on steroids.)

 

-Larry

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  • 1 year later...

Slightly OT, but where do people get 2732 Eproms from these days? They're insanely expensive on eBay. Can a pin-compatible flash chip be used instead (say, for a US Doubler mod)?

 

There is nothing current that is directly pin compatible, you'd have to build a small PCB..

 

I have a stack of old 27CX641 EPROMS, that are 8Kx8, but in a 24 pin package. Very useful for this as with the addition of a wire I can fix 8K into the same socket...

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Slightly OT, but where do people get 2732 Eproms from these days? They're insanely expensive on eBay. Can a pin-compatible flash chip be used instead (say, for a US Doubler mod)?

There are some sellers on ebay selling in quantities of 5-20 units who have 2732 eproms as low as $1 each with free shipping.

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Hello All,

 

With a little bit of work, a modern Flash-Rom can also be used to replace a 2732. Just a bit of wireing to connect the extra pins to some fixed values.

But of course larger Eproms will do the same and with the same kind of extra connections.

That's one of the advantages of a Jedec-compattible pin-layout.

 

BR/

Guus

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Yeah I noticed a lot of "collections" but I just wanted the one for the moment. Thanks though! :)

There are a few available individually for about US$1.50(1£) w/free shipping.

eBay Auction -- Item Number: 1816308987091?ff3=2&pub=5574883395&toolid=10001&campid=5336500554&customid=&item=181630898709&mpt=[CACHEBUSTER]

eBay Auction -- Item Number: 3512286752501?ff3=2&pub=5574883395&toolid=10001&campid=5336500554&customid=&item=351228675250&mpt=[CACHEBUSTER]

Or in pairs for under $3(2£) w/free shipping.

eBay Auction -- Item Number: 2011359333051?ff3=2&pub=5574883395&toolid=10001&campid=5336500554&customid=&item=201135933305&mpt=[CACHEBUSTER]

 

These don't show up on a search on eBay UK for some reason.

Edited by BillC
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