Denial

I actually have a project on the bench that should handle this. ... I made it a 28 pin EPROM so it could be used for lots of platforms, not just the VIC, but you could optimze the design onto a cart directly for VIC specific operation. Jim I like the sound of this! How do you handle the updates? I ...

I actually have a project on the bench that should handle this. It's an esp32 on a PCB that plugs into a 28pin EPROM socket. The idea is that the esp32 connects to the local WLAN and presents a TFTP (or something, code is not written for this) server to the world. The developer then compiles/assembl...

Indeed, you could go all the way to 37kB if you put RAM in the IO regions (3 1kB blocks [RAM1,2,3] + 4 8kB blocks [BLK1,2,3,5] + 2 IO 1kB blocks [IO2/3]

And, if you use a bank switcher, like UltiMem, you can use as much RAM as you want (or can afford)

Jim

$$$ is the most likely reason. In the era, 8kB was expensive, 16kB was hard to justify due to expense (otherwise, KERNAL and BASIC would have been loaded onto a single 23128). I suspect, knowing that, Michael and company stipulated games under development by internal and/or external resources needs ...

I've got atmega8/88/168/328 code that replicates the 1351 and I remember having some defines in the code to make the mouse function work on the VIC-20. It's not up on github yet, but holler if you want it. It was for a project called PSXJoy...

I think it would require an active interface. You can use an arduino or esp or something's ADCs to read the POTs, and then use a digital pot IC to feed the correct resistance into the 64. An experienced developer could use just an Arduino by itself without the digital pots by mimicking how the 1351 ...

sdi2ec supports JiffyDOS, which is available on VIC, 64,128,264 series, for what it's worth. But yes, sd2iec was always designed as a mass storage device, not a 1541 replacement, so that has to be kept in mind. It was also designed to be inexpensive, though Pi1541 can also be inexpensive and support...

As far as i can see, some of the tapuino/sd2iec devices only work fully on c64, partly on vics/+4, not at all on pets or other 6502s.. They should work perfectly on VIC and 264 series, as well as 128/128D/DCR and SX. If you want PET, I think there is PetSD for that (same idea, just IEEE 488), but f...

To answer the OP, it for sure is possible. Most SD cards are OK being clocked slower than maximum, so you're OK there. The 6522 is a great place to start, but I'd skip trying to use the build in shift register. It seems like it would be a nice HW solution, but SPI is bidirectional, and the 6522 is n...

Yes I thought that too, but someone who was reverse asm the ROMs for PET basic and VIC20 figured out that it cam from Basic 4.0. This was the history for the earliest Basic ROMS: https://www.pagetable.com/?p=46 I will have to dig out the one for Basic 4/vic.. I found it: https://www.pagetable.com/?...

I understand that they took Basic 4 from the Pet 4032, stripped the disk commands out and put it in the Vic20 as Basic 2.0. That was then put in the c64. Can you point to notes about that? I was under the impression they had BASIC v2 (from the original PET 2001 days) and just used that as the base....

Dremel with a small sanding wheel would be my recommendation. It will go slower, but you can get a more even chamfer But, if you're handy with tools, a disc sander on the drill will be quick, but beware ensuring the sand is even. Though, to be fair, the VIC-20 .156" cart slot is very forgiving,...

Hehe, I did the same, and I figured out you could put lots of switches on the joystick port if you used only 1 at a time and used diodes (I can't remember off top of head how, but I am sure I can re figure it out). Anyway, I took out a keypad from a phone or similar and wired all the keys up to a jo...

[M]ovable [O]ff [R]oad [T]ransport or M.O.R.T. for short :-) https://i.postimg.cc/pLGPYNr3/ROBOT.png Not sure if it meets your criteria, but it was a labor of love. Always unfinished, and I still have it (disassembled, I need to re-assemble it). It ran on a 12V car battery and used windshield wiper ...

Brilliant! Thank you! What radius should I be using on the corners of the edge connector do you think? I just got back in town and saw this. Give me a rest cycle and I'll measure it. Jim It's 1.27mm, give or take (I checked a few, and they are a bit inconsistent.) Edge connector is ~3.58" (90....