Search found 526 matches
- Fri Apr 19, 2024 2:12 pm
- Forum: Buy, Sell, and Trade
- Topic: WTB: Cardco Cardboard 6
- Replies: 11
- Views: 2835
Re: WTB: Cardco Cardboard 6
I wouldn't attempt to fit the largest available cartridges in it because of the extra cost involved - I have an 80 column cart that is about 2x the thickness of a standard one. People can always sacrifice one slot for something big like that. As long as the spacing is large enough to accommodate ca...
- Thu Apr 18, 2024 9:19 pm
- Forum: Hardware and Tech
- Topic: Cart Expander connector spacing?
- Replies: 0
- Views: 43
Cart Expander connector spacing?
Revisiting my X-Pander 3 VIC design as I plan to get it up on Github and perhaps consider a re-run. It had bugs and I'd like to get them fixed before I put something into the wild. Is there a preferred port spacing? Also, as I recall, pin 20 and pin Y, though noted as N/C on many pinouts, were in ac...
- Thu Apr 18, 2024 11:56 am
- Forum: Buy, Sell, and Trade
- Topic: WTB: Cardco Cardboard 6
- Replies: 11
- Views: 2835
Re: WTB: Cardco Cardboard 6
As I remember Jim made 100 of these, but noticed the dip-switches were to close to the cartridge slots, so you could not plug in a standard cartrdige fully. You can still buy this for $22 a piece and I got one some years ago: https://store.go4retro.com/non-functional-goodies/ See the notes at the b...
- Tue May 25, 2021 10:13 pm
- Forum: Emulation and Cross Development
- Topic: libultimem for cc65 (C/asm)
- Replies: 9
- Views: 778
Re: libultimem for cc65 (C/asm)
Sorry I didn't see this earlier. It's very much appreciated!
Let me know how I can help get this working on real HW.
Jim
Let me know how I can help get this working on real HW.
Jim
- Sat Mar 27, 2021 12:06 am
- Forum: Hardware and Tech
- Topic: Question on serial port
- Replies: 2
- Views: 313
Re: Question on serial port
As the linked posting illustrates, the inverters are open collector, which is very important for the bus. You could somewhat accomplish the same thing by putting pullup resistors on all the VIA pins connected to the bus and switching the output to an input when you want to send a '1',, but the 6522 ...
- Wed Feb 24, 2021 2:01 pm
- Forum: Hardware and Tech
- Topic: My hardware project :: GCart 2011
- Replies: 154
- Views: 90027
Re: My hardware project :: GCart 2011
Does the ARM automatically connect to the DRAM and handle refresh, or do you implement your own refresh scheme?
Jim
Jim
- Mon Feb 22, 2021 11:44 am
- Forum: Hardware and Tech
- Topic: My hardware project :: GCart 2011
- Replies: 154
- Views: 90027
Re: My hardware project :: GCart 2011
Does the cart allow FLASH in any bank besides 5?
Jim
Jim
- Fri Feb 19, 2021 8:38 pm
- Forum: Hardware and Tech
- Topic: My hardware project :: GCart 2011
- Replies: 154
- Views: 90027
Re: My hardware project :: GCart 2011
I'd fix this by using an 29F040b, which only requires 12 bit unlock codes. It's still 512kB, and I believe it still available. That way, the unlock can be done from any bank.
And, I think they are less expensive that your current option.
Jim
And, I think they are less expensive that your current option.
Jim
- Sun Jan 24, 2021 1:13 am
- Forum: Hardware and Tech
- Topic: My hardware project :: GCart 2011
- Replies: 154
- Views: 90027
Re: My hardware project :: GCart 2011
Here's the repo for UltiMEM: https://github.com/go4retro/UltiMEM And, the register description is here: http://www.go4retro.com/products/ultimem/ Essentially, each of the various memory segments (RAM 1,2,3 | BLK1 | BLK2 | BLK3 | BLK5 | IO2 | IO3) can be set to read/write RAM, R/O RAM, ROM, or nothin...
- Mon Jan 18, 2021 10:53 pm
- Forum: Hardware and Tech
- Topic: My hardware project :: GCart 2011
- Replies: 154
- Views: 90027
Re: My hardware project :: GCart 2011
I'll put the UltiMEM schematics and such into github, as it sounds a lot like your current project (8MB FLASH, 1MB RAM, bankable blocks and rams and IO segments)
Jim
Jim
- Sat Dec 12, 2020 1:22 pm
- Forum: General Topics
- Topic: Bible Series I and II reviewed - and possible problem
- Replies: 15
- Views: 1579
Re: Bible Series I and II reviewed - and possible problem
Ingo's dedicated opinion is not a good basis to get things done, Well, given that these things are passion projects, not financial items, I think it's as good a basis as any if one expects Ingo to do the work. The promise of open source was that lots of people would contribute to source code, but t...
- Sat Dec 12, 2020 11:39 am
- Forum: General Topics
- Topic: Bible Series I and II reviewed - and possible problem
- Replies: 15
- Views: 1579
Re: Bible Series I and II reviewed - and possible problem
Jim, I think it would be best to modify the implementation to not use 1581 sub-partitions, quite honestly. sub partition support in sd2iec requires a ton of code to make it work (one has to implement formatting inside an image, and the code for sub-partitions cannot be shared with any other drive t...
- Fri Dec 11, 2020 7:07 pm
- Forum: General Topics
- Topic: Bible Series I and II reviewed - and possible problem
- Replies: 15
- Views: 1579
Re: Bible Series I and II reviewed - and possible problem
I think it would be best to modify the implementation to not use 1581 sub-partitions, quite honestly. sub partition support in sd2iec requires a ton of code to make it work (one has to implement formatting inside an image, and the code for sub-partitions cannot be shared with any other drive type), ...
- Tue Nov 10, 2020 10:18 pm
- Forum: Hardware and Tech
- Topic: Need Help with VIC Hardware Diagrams
- Replies: 19
- Views: 1217
Re: Need Help with VIC Hardware Diagrams
With apologies to those who think $ffff should be at the bottom, it is more common for 0 to be at the bottom and $MAX to be at the top: https://www.google.com/search?q=memory+map&client=firefox-b-1-d&tbm=isch&source=iu&ictx=1&fir=KdgyaK_ZB_qykM%252C-IK5sMTdXGbYiM%252C%252Fm%252F0...
- Sat Oct 10, 2020 5:15 pm
- Forum: Buy, Sell, and Trade
- Topic: MasC=uerade!
- Replies: 0
- Views: 519
MasC=uerade!
For the brave, the adventurous, the ones willing to try new things, after an incredibly long wait, I present the MasC=uerade. This unit remaps control lines from the VIC-20 onto a pseudo C64 cartridge socket, potentially allowing C64 I/O cartridges to operate in the VIC-20. At $11.00, it's almost to...