For sale: 37k RAM expanders with gold plated connectors

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eslapion
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For sale: 37k RAM expanders with gold plated connectors

Post by eslapion »

Full featured 37k RAM expansions, with gold plated edge connector, reset button and full DIP switch controls.

Features:
- RAM expansion in BLK 1,2,3 and 5 areas with read-only mode on switch
- 3k RAM expansion area ($0400-$0FFF)
- IO2 and IO3 areas
- Master enable/disable switch
- Uses only new components - no NOS parts
- Full RoHS compliant boards and components
- Full schematics available

Pricing is 20 Euros or 24.50$US
DIP switches
DIP switches
Prototype
Prototype
DIP switches functions:
1- BLK1 RAM enable ($2000-$3FFF)
2- BLK2 RAM enable ($4000-$5FFF)
3- BLK3 RAM enable ($6000-$7FFF)
4- BLK5 RAM enable ($A000-$BFFF)
5- BLK 1,2,3 and 5 read-only/normal
6- BLK 1,2,3,5 enable
7- IO2,3 RAM enable ($9800-$9FFF)
8- 3k RAM enable ($0400-$0FFF)

Yes, there is a battery holder but this feature is untested at this point and not included at the above price.
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Radical Brad
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Re: For sale: 37k RAM expanders with gold plated connectors

Post by Radical Brad »

Nice looking board!

May I ask which PCB house you use?
I will be looking to make a few boards for various projects.

Brad
norm8332
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Re: For sale: 37k RAM expanders with gold plated connectors

Post by norm8332 »

Good idea making the grounds a bit longer. 8)
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eslapion
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Re: For sale: 37k RAM expanders with gold plated connectors

Post by eslapion »

Radical Brad wrote:Nice looking board!

May I ask which PCB house you use?
This is a small batch (prototypes). In small quantities, OshPark is the least expensive.

Production units may look different.
norm8332 wrote:Good idea making the grounds a bit longer. 8)
This is Fredric's idea actually.
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dimebag
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Re: For sale: 37k RAM expanders with gold plated connectors

Post by dimebag »

hi
how order ??

cheers

Laurent
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cbmeeks
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Re: For sale: 37k RAM expanders with gold plated connectors

Post by cbmeeks »

eslapion wrote:In small quantities, OshPark is the least expensive.
Not by a country mile.

Try JLCPCB.
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eslapion
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Re: For sale: 37k RAM expanders with gold plated connectors

Post by eslapion »

cbmeeks wrote:
eslapion wrote:In small quantities, OshPark is the least expensive.
Not by a country mile.

Try JLCPCB.
Looks like they have good deals. Thanks for the tip!
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eslapion
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Re: For sale: 37k RAM expanders with gold plated connectors

Post by eslapion »

SOLD OUT!
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