Sold 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 and upper metal shield , RAM extension to 2MB CHIP RAM with RTC, without FAT AGNUS 8375 and ECS Super Denise 8373.


This type boards are 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 on this thread 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 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 (showed on photos below) 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 when You buy both (mainboard with 2MB extension) is 105Euro



Proof of ownership is on first photo


Board's description:

Amiga 500+ rev. 8a, with bottom & upper metal shield. Board is working when all custom chips inserted. Board was repaired - original joy, mouse, serial, parallel and video RGB ports had a damages (broken pins or corrosion stains on metal shields of dsubs) and they was unsoldered and brand new DSubs was soldered. Also Denise sockets was broken - it was changed with new 48pin socket.
At last : badly chip u38 - 75188 (rs232) was unsoldered and new, working chip was mounted with socket.

All was tested with 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 (REV37.300)
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.

 

[freaktmp]

Declaring interest, pending questions.

 

[freaktmp]

Payment sent!

 

[freaktmp]

Motherboard received. Thank you!!!

 

[Chris_vs]

Hi!
Im very glad that package arrived to You safely!! Thanks for information and best Regards
Chris