Search found 408 matches

by MCes
Wed Oct 27, 2021 3:23 pm
Forum: Hardware and Tech
Topic: The DIY cartridge: JOLLY CARTRIDGE!
Replies: 105
Views: 7039

Re: The DIY cartridge: JOLLY CARTRIDGE!

That would be great! I love the idea of taking cassette games and giving them their own cartridges. I grew up in the UK and had some games on cassette as a kid that were released on cartridge here in the US (specifically Amok and Grid Runner), so it's great to be able to do that with other games to...
by MCes
Wed Oct 27, 2021 1:57 am
Forum: Hardware and Tech
Topic: The DIY cartridge: JOLLY CARTRIDGE!
Replies: 105
Views: 7039

Re: The DIY cartridge: JOLLY CARTRIDGE!

Yes, it isn't a cartridge game, and yes, that's exactly what happens. Mces has explained it in this thread: Sorcery is 12.5 Kb, it's stored in a ROM, and copied on the fly to the RAM upon usage. See Mces' earlier post here . Bonzo may be flashed to ROM too, as long as it's a single file and <12.5 K...
by MCes
Mon Oct 25, 2021 3:15 am
Forum: Hardware and Tech
Topic: The DIY cartridge: JOLLY CARTRIDGE!
Replies: 105
Views: 7039

Re: The DIY cartridge: JOLLY CARTRIDGE!

Now I have looked at it a bit deeper, and I understand how the jumpers behave (I think), I have one further question - how do you create the ROMs? Obviously I don't mean how do you burn them, but where in the 512Kbits of a 27C512 does what go?, ie how do I combine for example SJLoad and 2x8K ROMs i...
by MCes
Mon Oct 25, 2021 2:31 am
Forum: Hardware and Tech
Topic: The DIY cartridge: JOLLY CARTRIDGE!
Replies: 105
Views: 7039

Re: The DIY cartridge: JOLLY CARTRIDGE!

+24k RAM, +12.75k ROM self-loading on RAM. How does it work? The autostart launcher occupy 1 page into BLK5 (<256Bytes) and starts copying to RAM the 31 pages present in the remaining BLK5 area: 7.75kBytes. The launcher continuous copying to RAM 8page (2K) from I/O2,3 areas, then it end copying to ...
by MCes
Fri Oct 22, 2021 9:56 am
Forum: Hardware and Tech
Topic: The DIY cartridge: JOLLY CARTRIDGE!
Replies: 105
Views: 7039

Re: The DIY cartridge: JOLLY CARTRIDGE!

Now, it would be great for me to have my own Sorcery cartridge, with its box and manual! Can we do it Max? P_20211021_093939.jpg The beta cartridge is ready...(remember that I can't supply the plastic shells) I have to test the game! P_20211021_105159.jpg This configuration (+24kRAM, +13kROM) is li...
by MCes
Wed Oct 20, 2021 2:51 pm
Forum: Hardware and Tech
Topic: The DIY cartridge: JOLLY CARTRIDGE!
Replies: 105
Views: 7039

Re: The DIY cartridge: JOLLY CARTRIDGE!

(..) Do they fit OK in TFW8B cartridge cases? It looks like they should be a good fit. I try to always use the same shape of the cart because it is easy to pull out by hand, it does not protrude from the cartridge compartment, and it can be placed inside the shells of standard cartridges...... P_20...
by MCes
Tue Oct 19, 2021 11:00 am
Forum: Hardware and Tech
Topic: The DIY cartridge: JOLLY CARTRIDGE!
Replies: 105
Views: 7039

Re: The DIY cartridge: JOLLY CARTRIDGE!

It looks cool! My ideal cartridge PCB would: (1) Be able to accept a 28C64B and locate it as ROM at block 3 (2) Add 8KB RAM at block 5 Would this one be able to do that? If so, my other question's the same as Doug's; how do we get them? Your is a strange configuration for a RAM/ROM cart: RAM is req...
by MCes
Tue Oct 19, 2021 10:08 am
Forum: Hardware and Tech
Topic: The DIY cartridge: JOLLY CARTRIDGE!
Replies: 105
Views: 7039

Re: The DIY cartridge: JOLLY CARTRIDGE!

That looks really nice. I like the flexibility of being able to use it for pretty much whatever you want. One question though - will you be selling these, putting them on Github etc? The JOLLY CARTRIDGE has been designed bearing in mind that a reduction in costs can be achieved by producing a batch...
by MCes
Sun Oct 17, 2021 6:11 am
Forum: Hardware and Tech
Topic: The DIY cartridge: JOLLY CARTRIDGE!
Replies: 105
Views: 7039

The DIY cartridge: JOLLY CARTRIDGE!

Finally a basic DIY cartridge that can be any standard cartridge you want (and more): the JOLLY CARTRIDGE is here! PROTO.jpg NAKED.jpg Perfect for fiddling with all possible RAM expansion capabilities, as a new cart for old downloaded software or as a support for your own new software even in small...
by MCes
Sun Aug 22, 2021 5:18 am
Forum: Hardware and Tech
Topic: Voltage level shifter recommendations?
Replies: 6
Views: 415

Re: Voltage level shifter recommendations?

An example.... https://www.ti.com/product/SN74CBTD3384#tech-docs page 5 into http://focus.ti.com/pdfs/logic/bswitchprodbull.pdf you need the CBT D version... This "analog switch" does not buffer the I/O, but it does not need to be declared the signals direction and the High Z state..... th...
by MCes
Fri Feb 19, 2021 12:41 pm
Forum: Hardware and Tech
Topic: “Vicky Twenty” - late model replacement board
Replies: 11
Views: 1372

Re: “Vicky Twenty” - late model replacement board

This replica board is a great job, and probability its value is also because it's like as the original one.... Personally I would have implemented some tricks .... 1 ) the double mounting possibilities to be fitted ROMs as 2332/2364 or the 27C32/27C64 2 ) using 2x 8kram instead 2x2k+3x(1/2)k 3 ) usi...
by MCes
Fri Feb 19, 2021 8:16 am
Forum: Hardware and Tech
Topic: My hardware project :: GCart 2011
Replies: 154
Views: 89793

Re: My hardware project :: GCart 2011

TLovskog wrote: Sun Feb 14, 2021 8:20 am Next stop is the handling of flashing the flash memory.
Is the flash memory writable by VIC 20 (and how)? because I read from the datasheet that it need particular HW procedures....
by MCes
Mon Dec 21, 2020 9:14 am
Forum: Games
Topic: DreamCart: for new games a new kind of cart support is now possible!
Replies: 17
Views: 1252

Re: DreamCart: for new games a new kind of cart support is now possible!

(...) In any case, you would use part of I/O x to hold paged ROM data (say, I/O 2 to transfer 1K pages in one go), from which BLK1..3 (and eventually BLK5) are filled (...) You'd need an 8 bit latch register for the upper address lines of the (E)EPROM, the register which would be located in I/O 3. ...
by MCes
Sun Dec 20, 2020 3:54 am
Forum: Games
Topic: DreamCart: for new games a new kind of cart support is now possible!
Replies: 17
Views: 1252

Re: DreamCart: for new games a new kind of cart support is now possible!

Programs/Games that are ultimately intended to run on a cartridge should ...... That's exactly what I don't want: a SW version expressly written for fitting a cartridge.... At the opposite side I want a cartridge expressly developed to be fitted by a common .PRG files (+ a little standard firmware:...
by MCes
Sat Dec 19, 2020 11:32 am
Forum: Games
Topic: DreamCart: for new games a new kind of cart support is now possible!
Replies: 17
Views: 1252

Re: DreamCart: for new games a new kind of cart support is now possible!

My suggestion for a "univeral" (....) If you want make a physical cartridge with an old game/software you can easily download its .BIN image from Zimmers and put it inside an (E)EPROM that has to be fitted on a simple PCB, no other HW resorces are needed, and it's possible because those S...