From: groepaz (groepaz_at_gmx.net)
Date: 2001-10-17 15:38:34
Hello Mark, Wednesday, October 17, 2001, 3:19:52 PM, you wrote: KM> Forgive my non-familiarity of the C64 disk drive but KM> how would the server running from its ROM know about KM> the filesystem layout? Isn't the drive only working at KM> a sector level? The Atari's require a disk operating KM> system (DOS) to be booted into RAM to handle such things KM> as free/used sectors, directories etc. How the C64/1541 KM> handle this? all cbm IEC-bus devices (such as the 1541 discdrive) are so-called "intelligent devices" ... they have their own cpu+ram+rom+i/o and so they are basically a microcomputer of its own.... all the dos-stuff you are referring to is entire handled by the drive itself, the c64 just issues commands like "open file xyz" or "read 2 bytes from open file" or whatever.... the c64 doesnt (need to) know about the drives hardware-layout by this time. -- Best regards, groepaz mailto:groepaz_at_gmx.net ---------------------------------------------------------------------- To unsubscribe from the list send mail to majordomo_at_musoftware.de with the string "unsubscribe cc65" in the body(!) of the mail.
This archive was generated by hypermail 2.1.3 : 2001-12-14 22:05:43 CET