Re: [cc65] offtopic: random numbers in c64

Date view Thread view Subject view

From: Marko Mäkelä (marko.makela_at_hut.fi)
Date: 2003-06-27 13:28:53


On Fri, Jun 27, 2003 at 11:28:30AM +0200, Stephan Lesch wrote:
> Also, I think the c128 has eight bit color ram. (It has a
> 2k x 8 ram, but I don't know if the upper bits are connected)

The upper bits are not connected.  In the C128 mode, the LORAM and HIRAM
bits of the on-chip I/O register of the processor select the colour RAM
bank for the processor and the video chip.  I guess 4-bit, 2-kiloword
RAM chips were not available, and it was cheaper to waste the upper bits.

	Marko
----------------------------------------------------------------------
To unsubscribe from the list send mail to majordomo_at_musoftware.de with
the string "unsubscribe cc65" in the body(!) of the mail.


Date view Thread view Subject view

This archive was generated by hypermail 2.1.3 : 2003-06-27 13:29:01 CEST