Sold VIC 20 adaptive expansion cartridge up to +123K

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MCes

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I propose a very flexible and powerful tool for your VIC 20,
it's a cartridge for memory expansion that is configurable via an internal 4bit PIO.
PIO is located in each address from 39936 to 40959 (for simplicity '40000') and it's Writable and Readable so the cartridge could be also DYNAMICALLY reconfigured by a working software.
At VIC20 startup you type "POKE40000,N" with 'N' that means:
0) unexpanded configuration (default at powering up)
1) +3K (RAM1+RAM2+RAM3)
[+3k(Basic)]
2)
like '1' and more: +16K (BLK1+BLK2) [+3k,+16k(Basic)]
3) like '2' and more: +16K WRITE PROTECTED (BLK3+BLK5)

4)
like '3' but without the write protection of BLK3,5 [+3k,+24k(basic),+8k]

5..15) like '4' but BLK5 is re-addressed in another of 12 "RAM expansion segments".
So cartridge could become every expansion that you need and/or the memory support of a software that can dynamically chose a 8k page in BLK5 from a 12*8K=96K memory space .

After "POKE40000,N" you can type SYS64802 to restart the operative system of VIC20 for recognize the new memory asset.

PIO is readble with "PEEK(40000) AND 15"

REU.JPG

Price is 44€ +shipping (PayPall gift)
 
Last edited:
Thanks majikeyric,
my job is into the electronic world...
 
Last edited:
Money arrived,
cartridge sended!

@admin:
Please declare "SOLD", thanks!
 
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