From: bgrubb@dante.nmsu.edu (GRUBB)
Subject: Mac & IBM raw info
Organization: New Mexico State University, Las Cruces, NM
Distribution: na
Date: Mon, 28 Sep 1992 21:05:50 GMT

Was rewriting -Mac & IBM CPUs Info- and desided to broaden the subject.
Part of this is because the Mac vs IBM thread is getting very messy
and that the Mac CPU, hardware, and OS are besigned to work together,
so talking about one ONLY is silly.  This info list is incomplete so
any help that can be provided will be welcome.  When completed it
will, I hope, enable us to make convincing arguements for or against
the Mac.  Please if posible site articles that the information came
from.  Thank you.

The CPU

Note: I am not showing ALL the CPUs made by Motorola & Intel, just the ones 
in the Mac and the MAIN IBM machines. This is why, for example, the Motorola  
68008 and 68010 are not listed: Apple NEVER used these chips in the Mac.

Special thanks to pwagner%us.oracle.com and nan@matt.ksu.ksu.edu for part 
of the following info.

IBM     ALU  Registers  External  External  Total  Features/
CPU                      bus      address           Notes

 8088   16      16        8?        20?      52? {A dieing CPU}
 8086   16      16       16         20?      60? {Ditto}
80286   16      16       16         24       72   Protected Mode & MMU
80386   32      32       32         32      128   32-bit Protected Mode
80486   32      32       32         32      128   FPU

80586: Now called the P5.  I have not the foggiest idea except rumor
indicates a 64-bit superscalar chip with many RISC-like features, a
386-emulation unit for backward compatibility.  As to performance, Intel
claims 100+ MIPS. It is to be out in the first quarter of 1993 [InfoWorld 27 
July and Vaporware 9/92].{We need to see this thing.}
PowerPC: Rumor has it that it is due out at the end of the year and the 601 
machine will be four times as fast as a 50 MHz 486DX running Windows.{could 
give the P5 a run for the money with the five OSs that could run on this: 
DOS, Windows 3.x, OS/2, Mac OS, and UNIX (AU/X 4.0) and its earlier release 
date.}
NOTE:  this list is just the main CPU I do not have infomation on the 
differences of 386SX, 386DX, and 386SLC nor 486SX, 486DX, and 486DX2.


MAC     ALU  Registers  External  External  Total  Features/
CPU                      bus      address           Notes

68000   16      32       16         24        88 {Cheap CPU use}
68020   32      32       32         32       128 {no longer used}
68030   32      32       32         32       128     MMU
68040   32      32       32         32       128  MMU & FPU
68050: Not to be, see 68060
68060: WHO KNOWS? Better question with the RISCs coming: WHO CARES?
PowerPC: Rumor has it that it is due out at the end of the year and the 601 
machine will be three times as fast as a Mac Quadra. Rumor is that Apple is 
planning to provide info to third party developers to use this as an 
accelorator for present Nubus Macs [InfoWorld 3 August and Vaporware 9/92]

in compairing the CPUs the list looks like this:

8088/8086 ~ 68000 {a 16-bit vs a 16/24/32-bit chip (data path/address 
lines/data and address registers.  The ALU is what determines the bit
classification chip so the 68000 is 16-bit despite the higher bits
of the External Address(24) and the Registers(32)}{Side note: aside 
from use as a cheap CPU in the Classic and the lower end notebooks the 
68000 is basicly a dead CPU at Apple due to its poor preformence compaired 
to the 68030 under System 7.0.dot and the increasing demands of QT and, 
soon Quicktime GX on the CPU.}

286       ~ 68020 {This is the poorest compairison since the MMU in the 
286 pulls it past the 68020 and to the 68030 class while the 16-bit of the 
286 pulls it nearer the 68000. Since a IBM guru here says that VERY FEW 
programers or OSes use the MMU of the 286 the 68000 looks like a better 
comparison, but since the MMU does exist I desided that the 68020 fits
better even though the 286 is 16-bit and the 68020 32-bit.
Side Note: the 68020 just bit it -again and for good, I hope- as a CPU.}

386       ~ 68030 {The MMUs and 32-bit nature of these chips puts
them roughly together with protected memory a added feature of the 386.}

486       ~ 68040 {two 32-bit microprocessors with built-in FPU, MMU, 8K
internal cache.  The cache is implemented as two 4K caches in the 68040
and one in the 486.  This fits as far as that goes.}

P5(586)   ~ NA {This chip is intresting but may founder against the
more robust PowerPC chip.}

PowerPC   = PowerPC{This is the only CPU to be used by both IBM and
Apple and is planned to run DOS, Windows 3.x, OS/2, Mac OS, and PowerOpen 
(AU/X 4.0)

Hardware:
Color Support
Mac:  ALL PRESENT Macs execpt the Classic SUPPORT 24(32)-bit color. The
LCII and IIsi can work on 32 bit images in 8 bit mode.  With the exception
of the 12" color{69 dpi} monitor ALL Apple Mac monitors are 72 dpi. 

IBM:  I need infomation on this. monitor types:???(the old green and black 
type), EGA, VGA, SVGA

Expandtion
Mac: limited to the SCSI interface and memory expandtion until the LCII(PDS).
IIsi lowest machine with NuBus support.

IBM:  I need infomation on this.

OSes

Mac
6.0.7: Requires 2 MB and HD floppy and features a GUI, sudo-multitasking
(MultiFinder) and standard program interface.
6.0.8: 6.0.7 with 7.0.0 print drivers
7.0.1: Requires 4 MB, a 40 MB Hard Drive and a 68030 to run WELL. It has
6.0.7  features and AIC(between computers) built in network support, Virtural 
Memory in machines with MMU{1.6 times real RAM for least noticable speed 
degrigation on a IIsi}, and drag and drop.
AU/X 3.0(Unix): Needs a 160MB hard drive and 8MB of RAM and something the 
power of a fx(68030) or a Quatra(68040) to run well.
PowerOpen(AU/X 40): Rumor is that it is ahead of schedule to the point it 
COULD be out by the end of this year[MacWeek 13 July]

IBM
DOS 5.0: does this still have the 640K barrier?
DRDOS 6.0: Need Info, please
Window 3.1: breaks 640K barrier but still has to deal with DOS file stucture and runs well on 386SX.
Windows NT:  Rumor mill is that the FINAL version and ALL programing 
infomation not to be avalible before Oct 1993 (InfoWorld 25 May and 
InfoWorld 6 July which are sited in Vaporware 07/92 and 08/92 repectively.)
OS/2: Unix like featuresIand unix like requirements; a 80MB hard drive,
4 MB of RAM, and 386 CPU.


Price issue: Rumor is that Apple is dropping prices 15% to 20%
[MacWeek 17 August] and that the Preforma line will be out by September 14
[MacWeek 3 and 10 August].  IBM is planning cheap machines as well:
A 25 MHz 386SLC model with a 60 MByte hard drive and color VGA for less 
than $1,200 is planned after September 14.[MacWeek 17 August] These changes 
will in the LONG term change the price issue. Too early to tell though.


Bibliagraphy notes
VAPORWARE is availible in the digest/vapor directory on Sumex(36.44.0.6) and 
is by Murphy Sewall, From APPLE PULP H.U.G.E. Apple Club (E. Hartford) News 
Letter  $24/year, P.O. Box 18027, East Hartford, CT 06118.
Phone #: "Bit Bucket" (203) 257-9588 {"These are rumors folks; we reserve 
the right to be dead wrong!"}



Corrections to the INFORMATION are welcome

"Eliminate the impossible and what ever remains, no matter how improble,
is the truth" -- Sir Arthur Conan Doyle through Sherlock Holmes

"The Computer is your friend"--Parinoia RPG