Search found 195 matches
- Fri Mar 15, 2024 1:23 pm
- Forum: General Topics
- Topic: modded VIC 20 kernals?
- Replies: 14
- Views: 2321
Re: modded VIC 20 kernals?
The KERNAL is accessed through a jump table in RAM. You can change those jump points and switch out any KERNAL subroutine you want without having to replace ROMs.
- Thu Nov 17, 2022 11:09 am
- Forum: Hardware and Tech
- Topic: Can I Buy a VIC-20 Style Keyboard for Emulation?
- Replies: 2
- Views: 477
Can I Buy a VIC-20 Style Keyboard for Emulation?
Does anyone sell a Vic-20 style keyboard that I can plug into my PC for use with an emulator?
- Thu Nov 17, 2022 11:07 am
- Forum: Hardware and Tech
- Topic: Joystick in user port
- Replies: 19
- Views: 3727
Re: Joystick in user port
I remember an article, either in Compute or Compute's Gazette, that explained how to build the connector. I built one back in the day.
- Sun Sep 11, 2022 4:23 pm
- Forum: Other Systems
- Topic: The Secret Behind 80's Donkey Kong Jr. C-64 Demo Game
- Replies: 1
- Views: 3314
The Secret Behind 80's Donkey Kong Jr. C-64 Demo Game
A hilarious video: https://www.youtube.com/watch?v=KL5Nxew3szQ&ab_channel=8-BitShowAndTell Video takes a little monger than it should to get to the point but the payoff is worth it. Spoiler space: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
- Tue Jul 26, 2022 6:01 pm
- Forum: Games
- Topic: How many classic Vic games were fast-loaders?
- Replies: 7
- Views: 799
Re: How many classic Vic games were fast-loaders?
Most ran on the unexpanded VIC and were smaller than 3K, so there was less need for fastloaders on the VIC than on the '64.
- Wed May 25, 2022 3:36 pm
- Forum: Programming
- Topic: Emulating the Atari 2600 on the VIC-20? Hear me out...
- Replies: 8
- Views: 926
Emulating the Atari 2600 on the VIC-20? Hear me out...
Something I've put some thought into. Circa '81, when the VIC-20 was gaining traction, but games were scarce, Protecto Enterprises, who had Hong Kong connections and sold things like VIC-20 80-column cards, ran an ad in computer magazines offering something called an Atari Game Loader for the VIC-20...
- Mon Oct 07, 2019 10:57 am
- Forum: Other Systems
- Topic: The C16 - a Ferrari with no tires ?
- Replies: 14
- Views: 5153
Re: The C16 - a Ferrari with no tires ?
The C16/Plus4 line was a misfire. They enhanced the color capability over VIC-II chip but stripped out the sprite capability and simplified the sound capability; it was a step backward in many ways. The C16 didn't have enough memory, and the PLUS-4 had built in software that the market didn't want. ...
- Mon Oct 07, 2019 10:50 am
- Forum: General Topics
- Topic: VIC 20 multi-load tape software?
- Replies: 7
- Views: 3886
Re: VIC 20 multi-load tape software?
The common thing, especially for games written in BASIC, was that the first program would load graphics into memory from data statements and display instructions or maybe a splash screen, then would write text to the keyboard buffer that would cause the actual game to load and run. I wrote a game th...
- Mon Jul 01, 2019 9:29 am
- Forum: Emulation and Cross Development
- Topic: TheC64 to include a VIC-20 mode
- Replies: 18
- Views: 8699
Re: TheC64 to include a VIC-20 mode
It sounds like the new machine will use software emulation rather than hardware. I guess that this shouldn't matter, but somehow it does.
- Mon Jun 24, 2019 3:10 pm
- Forum: Other Systems
- Topic: Would it be possible to switch out the Vic 20 ROM for the 128?
- Replies: 1
- Views: 4387
Re: Would it be possible to switch out the Vic 20 ROM for the 128?
The kernal accesses the hardware directly, and wouldn't be able to deal with different hardware. The BASIC may not be able to deal with a different memory configuration.
- Mon Jun 24, 2019 3:07 pm
- Forum: Programming
- Topic: How do you make a demo?
- Replies: 19
- Views: 14496
Re: How do you make a demo?
Is there anything to be done in a demo that hasn't been done?
- Fri May 24, 2019 3:59 pm
- Forum: Other Systems
- Topic: 1978 book tells how to build KIM-1 based robot.
- Replies: 0
- Views: 4885
1978 book tells how to build KIM-1 based robot.
A mention of the Kim-1 on this forum reminded me of this: https://images-na.ssl-images-amazon.com/images/I/515uaYFveDL.jpg https://www.amazon.com/gp/product/0810456818/ref=dbs_a_def_rwt_bibl_vppi_i0 The book "How to build a computer-controlled robot" by Tod Loofbourrow. My library had this...
- Mon May 06, 2019 12:24 pm
- Forum: Other Systems
- Topic: Any love for the TRS-80 Color Computer?
- Replies: 17
- Views: 15839
Re: Any love for the TRS-80 Color Computer?
I think that a lot of people hated those joysticks, but for certain specific purposes there couldn't have been a substitute.
- Sat May 04, 2019 8:44 am
- Forum: Collecting and History
- Topic: Copyright on Vic20 Roms
- Replies: 20
- Views: 10435
Re: Copyright on Vic20 Roms
Do many programs use ROM entry points other than the KERNAL jump vectors? I can't imagine that many games would.
- Thu May 02, 2019 1:25 pm
- Forum: Collecting and History
- Topic: Copyright on Vic20 Roms
- Replies: 20
- Views: 10435
Re: Copyright on Vic20 Roms
When VTEC wrote their Apple II compatible ROMs for their Laser computer back in the 80's, they disassembled hundreds of popular programs to find all of the ROM entry points in use, and managed to produce a machine compatible with about 95% of existing software (there was some disagreement about this...