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Does anyone have some links to programming tools for the Victor-70?

If it's as similar to the Famicom as people make it out to be, this web site might be useful.

converting an old piece of software to run w/o serious bugs on new hardware does require some work. Nintendulator and Nestopia seem to run newly discovered and newly developed NES programs flawlessly, and given the amount of documentation that Nintendo still has about the NES, most of the work was done when Nintendo produced the acNES emulator for GameCube as part of the development of Animal Crossing. Most of the work is in recoding the game to be seizure-regulation-compliant (for example Link's death animation in Zelda II was changed) and getting an ESRB rating (for NES games that did not appear in ACPG or in Classic NES Series, and for Super NES games released prior to ESRB).

So, your O/S requires that you issue all read and write operations using the hard drive's native block size? That must suck. What else must you do? Setup DMA manually in your app? Solder a microcontroller onto the board perhaps? You try NES development. If you can't solder together your own devcart out of a gutted NES Game Pak (the analog of building your own lightsaber in the Star Wars universe), some prominent forum members will look down upon you as an "emulator weenie".

The O/S lets you write anything -- from a single byte, to gigabytes -- transparently; all you do is tell the O/S read n bytes of file F so and so into buffer at x, or write m bytes from buffer at y into file F, which is the interface that 99% of programmers use. Unless it is your job to port an operating system to new hardware. Or unless you are programming for a microcontroller in a handheld device whose resources are limited. Perhaps each file descriptor is associated with only 512 bytes of buffer, and adding 3584 more bytes per open file would require drastic cuts to the maximum number of open files or a larger, more expensive RAM in the system-on-chip.

I don't think there are many voluntaires that write device drivers for Windows in the first place

Would you say that if you were one? What should Kevin Horton, developer of the CopyNES development kit, or Memblers, developer of the Squeedo development cartridge, do?

Or just play hundreds of old nintendo games on an emulator on my computer for free.

I hope you're talking about homebrew games for Nintendo platforms, such as Solar Wars and Bombsweeper and Tetanus On Drugs and Luminesweeper. Otherwise, go directly to jail, do not pass Go, do not collect $200. If you want to compare unauthorized Internet copying of 1980s video games to something, compare it to unauthorized Internet copying of 1980s movies.