Re: CBM-II/B series questions(Basic Differences)

From: Marko Mäkelä (
Date: 2001-01-10 10:59:27

On Wed, 10 Jan 2001, André Fachat wrote:

> How can sprites be disabled by the operating system?

The interrupt service routine turns the sprites off unless the most
significant bit in the current text color code (location 646) is set.

> Is it not possible to just enable them by poking to the VIC? (Assuming
> 4064 has a C64-like basic without extra sprite commands).

Yes, it is.

> >   C128               122365 bytes
> Should this not also be separated into code and variable numbers?

For curiosity, the figure in the C128 start-up message is hardcoded (not
computed as in the C64 or the VIC-20).  It won't change if there are 4
available RAM banks.


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