Sujet : Re: The DOS 3.3 SYS.COM Bug Hunt
De : ldo (at) *nospam* nz.invalid (Lawrence D'Oliveiro)
Groupes : comp.miscDate : 25. Feb 2025, 08:54:58
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <vpjt0i$1qtkt$1@dont-email.me>
References : 1 2 3 4 5
User-Agent : Pan/0.162 (Pokrosvk)
On 25 Feb 2025 02:19:13 -0400, Mike Spencer wrote:
Learned all the basic principles of how computers operate --
intentionally obstructed from day 1 by Apple for Mac, dismally more
arcane for then-current 386.
The “Inside Macintosh” series had all the details. Volumes I and II
covered the software APIs, while Volume III described the original
Macintosh hardware: the video buffers, sound buffers, vertical refresh
interrupt, floppy interface, Z8530 serial controller chips, the lot.
Volume IV updated all that for the Mac Plus (with SCSI!).
Those Z8530 chips were wonderfully versatile. Back when your Microsoft-
compatible PCs were struggling to do transfers beyond about 19200bps, the
Mac could do 230.4kbps, or even a megabit per second with external
clocking (e.g. for MIDI).
The DOS 3.3 SYS.COM Bug Hunt
Re: The DOS 3.3 SYS.COM Bug Hunt