Search found 4717 matches
- Sun Jun 02, 2024 11:24 am
- Forum: Hardware and Tech
- Topic: Final Expansion :: 512KB SRAM + 512KB EEPROM + SD Card (2GB)
- Replies: 321
- Views: 81837
Re: FE3 crosstalk issues (was: UltiMem)
Has anyone found a way to fix this problem for the FE3 in the last 8 years? Or can you point me in the right direction, please? The issue has never been fixed, but the reason is known: the timing of CPU R/W accesses is derived from CR/W with some delay states in the FE3 CPLD. This is and had always...
- Sun Jun 02, 2024 7:29 am
- Forum: Hardware and Tech
- Topic: Victor Progress
- Replies: 4
- Views: 174
Re: Victor Progress
[...] the next task is to create a PCB that brings all the components onto one board (previously, I had an off-the-shelf FPGA development board with an interface card plugged into it). [...] In the commentary to your latest YT video, you write "[...] on one PCB. It'll be a bit of a chunky beas...
- Sun Jun 02, 2024 5:02 am
- Forum: Hardware and Tech
- Topic: Kung Fu Flash - like device?
- Replies: 7
- Views: 210
Re: Kung Fu Flash - like device?
Sorry, I didn't quite understand what VFLI use-case would not be achievable from your explanation. An associated BASIC extension would possibly want to retrieve the physical colour from a pixel akin to the @() function of MINIGRAFIK which does that for the logical colours. This is an operation you ...
- Sun Jun 02, 2024 3:53 am
- Forum: Hardware and Tech
- Topic: Kung Fu Flash - like device?
- Replies: 7
- Views: 210
Re: Kung Fu Flash - like device?
Is that a deal breaker? For me, yes. I write programs for the VIC-20 that do not just trivially use the whole-file load and save operations of the KERNAL. Seems the device fulfils the requirements of the OP and much more e.g. HDMI support. The OP asked for something that acts like a floppy drive. B...
- Sun Jun 02, 2024 3:25 am
- Forum: Hardware and Tech
- Topic: Kung Fu Flash - like device?
- Replies: 7
- Views: 210
Re: Kung Fu Flash - like device?
Take a look at SideKick64 [...] To quote from the READ ME: Drive emulation The Sidekick20 emulates LOAD and SAVE via kernal vectors, i.e. single-file programs and programs that use kernal routines LOAD/SAVE only work fine (for other programs use a real drive, Pi1541 or SD2IEC). The drive emulation ...
- Sat Jun 01, 2024 3:37 pm
- Forum: Hardware and Tech
- Topic: Kung Fu Flash - like device?
- Replies: 7
- Views: 210
Re: Kung Fu Flash - like device?
Not yet, unfortunately. The idea had been discussed in several threads here in Denial, starting with a proposal by TLovskog in 2011 for his GCart. It never happened. Some posts that round up things as of today: My hardware project :: GCart 2011 Ultimem or Final Expansion? Banked RAM cart ... In shor...
- Sat Jun 01, 2024 4:19 am
- Forum: Hardware and Tech
- Topic: Paged EEPROM
- Replies: 5
- Views: 153
Re: Paged EEPROM
Ultimem would fit the bill in a similar fashion. Jim is located in the US, and I've heard rumours that Jim plans for a new batch. Having, say, 8 sets of data for each half of BLK5 could be emulated (albeit somewhat wasteful) by providing 8² = 64 copies of the whole 8K range. 3 bits of the relevant ...
- Fri May 31, 2024 11:11 am
- Forum: Programming
- Topic: scroll routine $e975 (59765 in basic) doesn't work reliable for me
- Replies: 5
- Views: 208
Re: scroll routine $E975 (59765 in decimal) doesn't work reliably for me
The scroll down routine not only scrolls down from a given line, it opens a new physical line for the current logical line (unless the maximum of 4 physical lines for one logical line has been reached). In the case at hand, and as a side effect, it combines the two top physical lines into one logica...
- Fri May 31, 2024 10:32 am
- Forum: Programming
- Topic: scroll routine $e975 (59765 in basic) doesn't work reliable for me
- Replies: 5
- Views: 208
Re: scroll routine $E975 (59765 in decimal) doesn't work reliably for me
You would need to provide an executable (not just source code) of this test program and the exact course of actions up to the point where you think the routine deviates from expected behaviour for me (or anyone else) to follow through. The KERNAL retains any existing linking of physical lines into l...
- Fri May 31, 2024 8:41 am
- Forum: Programming
- Topic: scroll routine $e975 (59765 in basic) doesn't work reliable for me
- Replies: 5
- Views: 208
Re: scroll routine $E975 (59765 in decimal) doesn't work reliably for me
What is the reason for this [...] $E975 scrolls up logical lines . This is done by the screen editor to ensure no remnants of, respectively, incomplete logical lines are there at the top of the screen when, for example, BASIC programs are listed. With the start-up message on screen, the overflowing...
- Thu May 30, 2024 7:43 am
- Forum: Programming
- Topic: Background change at Raster Location
- Replies: 53
- Views: 4022
Re: Background change at Raster Location (was: ** Stable rasters on the VIC-20)
[...] It is somewhat frustrating to install this thread just to see Marko's outdated method being resurrected. :( Edit : to explain, and for posteriority - MrSterlingBS originally wrote his post above into the topic '** Stable rasters on the VIC-20' which has me as OP. I had started that other topi...
- Wed May 29, 2024 11:55 pm
- Forum: Buy, Sell, and Trade
- Topic: WTB: Cardco Cardboard 6
- Replies: 7
- Views: 8219
Re: WTB: Cardco Cardboard 6
Moderation notice: please check out the thread "WIP: X PANDER ViC" in the Hardware and Tech section.
Greetings,
Michael
Greetings,
Michael
- Tue May 28, 2024 7:40 am
- Forum: Programming
- Topic: Using interrupts in cartridge code
- Replies: 5
- Views: 296
Re: Using interrupts in cartridge code
The cartridge init code needs to setup the VIAs properly so that interrupts work at all. Changing the vector at $0314 is just boilerplate.
Please check out the discussion in the thread "Cartridge Auto Start Tips?".
Please check out the discussion in the thread "Cartridge Auto Start Tips?".
- Sun May 26, 2024 4:30 am
- Forum: Programming
- Topic: wAxpander with wAx2
- Replies: 74
- Views: 17902
Re: wAxpander with wAx2
Have you thought about adding the ability to chain files from disk- to allow assembly of much larger programs? That should already be possible with one of the established methods to chain programs from CBM BASIC, as wAx2 'merely' operates as BASIC extension. Eventually you will need to propagate th...
- Sat May 25, 2024 6:59 am
- Forum: Hardware and Tech
- Topic: Diagnostic Tools for the Vic-20
- Replies: 31
- Views: 4064
Re: Diagnostic Tools for the Vic-20
Please check out https://www.zimmers.net/anonftp/pub/cbm/firmware/misc/vc-20diag / vc-20-diag.zip , the file 'cart-pcb.jpg' in particular. The diagnostic cartridge requires RAM in RAM1 ($0400..$07FF) for own workspace variables. What is used as carrier is the same PCB that is otherwise used for the ...