For Sale Mainboard Amiga 500+ Revision 8A with 2MB Chip RAM + RTC, without Fat Agnus 8375 and Super Denise

[Chris_vs]

Hello!
I have to offer Amiga 500+ rev. 8a with bottom shield without FAT AGNUS 8375 and ECS Super Denise 8373.


This is version cost-reduced with only 0.5MB RAM on board and need soldering work for get their full capabilities of getting 2MB Chip RAM

Board has soldered a 3pin 2mm pitch male header on JP2 pads(look at photo below), and it allows for quick changing visibility of additional trapdoor 0.5MB RAM extension as:
SLOWRAM (jumper on pos.1-2) or
CHIPRAM (jumper on position 2-3).

Price for this board : 75Euro

And additionally , You can purchase a trapdoor extension which extend memory up to 2MB of CHIPRAM and give RTC circuit with CR2032 coin battery.

It works in two modes:
When JP2 on mainboard is set to 2-3 and jumper from trapdoor is set to Open , there will be full 2MB of CHIPRAM (0.5MB memory in 4 chips soldered on mainboard are not used anymore - all 2MB of RAM using chip from trapdoor extension).

When JP2 on mainboard is set to 1-2 and jumper from trapdoor is set to Closed, there will be 0.5MB of CHIPRAM and 0.5MB of SLOWRAM (also 0.5MB memory in 4 chips soldered on mainboard are not used anymore - all 1MB of RAM using chip from trapdoor extension).

RTC circuit was builded with M6242B chip , coin battery CR2032 is new.

Additional Price for extension (with little modyfing of mainboard for work with this trapdoor extension) - 35Euro.

Total price for both (mainboard with 2MB extension) is 110Euro



Proof of ownership is on first photo


Board's description:

Amiga 500+ rev. 8a, with bottom metal shield. Board is working when all custom chips inserted. PCB is in good condition.
Tested on many games, checked serial port and parallel port (tested with loopback and Amiga Advanced Analyzer), video - tested with SCART cable and VGA adapter (with monitor which supports 15,6kHz HSync), also monochrome RCA video is working. Sound is ok, external drive port, mouse/joy ports, keyboard port and RAM extension also are working.


Board have custom chips: 2*CIAs, GARY, CPU, PAULA, ROM 1.3 . All those chips are 100% working.
Additionally with board is ROM 2.0 (REV37.299)
Shield have corrosion stains.

Shipping:
Via Global Expres package with tracking, package will be very well secured with bubble foil.

European countries: 15Euro

I can also send with DHL courier - price depends of destination country.

Time from payment to sent: max. 2 working days

Payment:
Via IBAN / REVOLUT/ PAYPAL (F&F)

Board is from my private collection.
If You need custom chips for Amiga 600 or 500 check my other threads or write to me.

 

[Koolvin]

Declaring interest.

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Declaring interest in motherboard

 

[Koolvin]

Sale agreed and payment sent