Search found 110 matches

by MCes
Wed Aug 09, 2017 12:23 pm
Forum: Buy, Sell, and Trade
Topic: WTB: VIC-20 Chips (NTSC)
Replies: 6
Views: 98

Re: WTB: VIC-20 Chips (NTSC)

I have an original ntsc kernal, where are you?
by MCes
Tue Jul 25, 2017 1:22 am
Forum: Hardware and Tech
Topic: List of banking memory expansions (more than 35K RAM)
Replies: 5
Views: 156

Re: List of banking memory expansions (more than 35K RAM)

I developed a +123k REU that can be used as standard multi configurable RAM expansion and as 12x 8k paging on BLK5 for a total of 123k ram available. Only prototype was produced, but if more than 4 people will be interested in getting it then I can draw the PCB and make the REU http://sleepingelepha...
by MCes
Sun Jul 16, 2017 2:54 am
Forum: Buy, Sell, and Trade
Topic: FOR SALE: VIC20 FULL-RAM expansion cartridge +37K RAM with RESET!
Replies: 17
Views: 467

Re: FOR SALE: VIC20 FULL-RAM expansion cartridge +37K RAM with RESET!

A question: SJLoad work only on PAL VIC20 or on NTSC too? About comparing Tokra $98C40-assembled SJLoad version and my $9800 (SYS40000) assembled version: Tokra's one is a smaller file (less than 1k) and use only I/O3 area (I/O2 free), but it's limited (no SJ-save, no declaring start-stop address.....
by MCes
Sat Jul 15, 2017 2:59 am
Forum: Buy, Sell, and Trade
Topic: FOR SALE: VIC20 FULL-RAM expansion cartridge +37K RAM with RESET!
Replies: 17
Views: 467

Re: FOR SALE: VIC20 FULL-RAM expansion cartridge +37K RAM with RESET!

This really is a great little card. :D Thanks MCes. Thanks Vicist, I'm happy for your enthusiasm in discovering the potentiality of your "new" VIC20 system... If I remember well the RAM into i/o areas is (now) out of VICE possibilityes.... the real world win! Try the attached file, it sho...
by MCes
Sat Jul 15, 2017 12:06 am
Forum: Buy, Sell, and Trade
Topic: FOR SALE: VIC20 FULL-RAM expansion cartridge +37K RAM with RESET!
Replies: 17
Views: 467

Re: FOR SALE: VIC20 FULL-RAM expansion cartridge +37K RAM with RESET!

This really is a great little card. :D Thanks MCes. Thanks Vicist, I'm happy for your enthusiasm in discovering the potentiality of your "new" VIC20 system... If I remember well the RAM into i/o areas is (now) out of VICE possibilityes.... the real world win! Try the attached file, it sho...
by MCes
Sat Jul 08, 2017 4:31 am
Forum: Buy, Sell, and Trade
Topic: FOR SALE: VIC20 FULL-RAM expansion cartridge +37K RAM with RESET!
Replies: 17
Views: 467

Re: FOR SALE: VIC20 FULL-RAM expansion cartridge +37K RAM with RESET!

Yes, I know: Gold is better than Tin, but..... HASL can damage a VIC-20's cartridge port connector in the long run... never heard before.... the worst case after years could be the eventual oxidation of cart fingers, but (oxide) Tin is soft respect to the contact metal into VIC20 connector, the oxid...
by MCes
Sat Jul 08, 2017 2:17 am
Forum: Buy, Sell, and Trade
Topic: FOR SALE: VIC20 FULL-RAM expansion cartridge +37K RAM with RESET!
Replies: 17
Views: 467

Re: FOR SALE: VIC20 FULL-RAM expansion cartridge +37K RAM with RESET!

vicist wrote:Payment sent.


Payment received,
+37K REU shipped!
by MCes
Fri Jul 07, 2017 11:16 pm
Forum: Buy, Sell, and Trade
Topic: FOR SALE: VIC20 FULL-RAM expansion cartridge +37K RAM with RESET!
Replies: 17
Views: 467

Re: FOR SALE: VIC20 FULL-RAM expansion cartridge +37K RAM with RESET!

mrr19121970 wrote:Is it HASL or ENIG ?


It's HASL
by MCes
Thu Jul 06, 2017 11:21 am
Forum: Buy, Sell, and Trade
Topic: FOR SALE: VIC20 FULL-RAM expansion cartridge +37K RAM with RESET!
Replies: 17
Views: 467

FOR SALE: VIC20 FULL-RAM expansion cartridge +37K RAM with RESET!

VIC20 FULL-RAM expansion cartridge +37K RAM with RESET! Every VIC 20 expandable memory areas can be covered (also the I/Os areas), and BLK 5 can also be write protected! https://s21.postimg.org/6nraayas3/fronte.jpg https://s21.postimg.org/ehrvwcikz/retro.jpg Dip-switch: 1.) 8K= BLK1: $2000-$3FFF (81...
by MCes
Wed Jul 05, 2017 2:10 pm
Forum: Buy, Sell, and Trade
Topic: WTB Vic 20 Case - Any condition
Replies: 2
Views: 98

Re: WTB Vic 20 Case - Any condition

maybe I have what you are looking for...
by MCes
Fri Jun 23, 2017 10:55 am
Forum: Hardware and Tech
Topic: I/O Addresses
Replies: 8
Views: 234

Re: I/O Addresses

Thanks for your words... No, I haven't a blog but you can find on this forum some ideas of mine. It's only a theoretical circuit, but it could near to be working: IMG_0003.GIF Q6 out of registered SIPO and it's negation (/Q6: Q6 via NOT gate) will generate the 2-bits for comparing with IO2 and IO3 l...
by MCes
Fri Jun 23, 2017 12:27 am
Forum: Hardware and Tech
Topic: I/O Addresses
Replies: 8
Views: 234

Re: I/O Addresses

Ok, try to follow my idea...... Target: a way to permit at software to set the bank address of the cartridge. Immagine:periferics or memory expansion (RAM/ROM) use every decoded lines (I/O2, I/O3, /BLKs, /RAMs...) My solution: take a serial in parallel out (SIPO) schift register that has this input:...
by MCes
Thu Jun 22, 2017 11:51 pm
Forum: Hardware and Tech
Topic: Game cartridge faulty from new
Replies: 5
Views: 146

Re: Game cartridge faulty from new

Cover the eprom window!
It's true that sunlight need years for damage the bytes,
but I destroyed an eprom (it will be un-reprogrammable!) taking a macro with my camera..... WITH FLASH!!!!!!
The UV inside the flash light destroyed my EPROM!

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