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AD-H391A-T1

May 1982

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Document:	uhler Functional changes to the PDP-10 architecture 19830328
Order Number:	AD-H391A-T1
Revision:	0
Pages:	2
Original Filename:	uhler_Functional_changes_to_the_PDP-10_architecture_19830328.pdf

OCR Text

!

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interoffice

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memorandum

e ittt
LT e +

To:

Architecture Committee List

CC:

Date:

28 Mar 83

From:

Mike

Dave Braithwaite

Dept:

L.S.E.G.

Ulf Fagerquist
Peter Hurley

DTN:
(8-) 231-6448
Loc/Mail stop:
MRO1-2/E85

Vern Poulter

Net mail:

Jack

Functional

the past

documenting
instances,

changes

few years,

changes
this was

Architecture

to

we

to

due

to

Committee

the

have
the

the

been

We are about
CPU which

to begin

has

lack

of

to

correct,

the

reasons

the

we

In

architecture

the Jupiter

||

The

initial

functional

from

the

o

KCIO version 8

chapter
Other

(March 29,

Extended
part of

requests

to be

be

included

the

for

has

been

functional

functional

changes

architecture must

17:00,

Friday,

change must

have been

Architecture

wish

or

of

the

to have

as

in

be

taken

update

a

chapter

29-Apr-83.

To

be

proposed

In

to

the

at
a

a

in

that

the

including

no

||

later

a proposed

meeting

complete

listed

Jupiter

by me

considered,

addition,

change,

in

received

be

in

the machine.

corrections

included

reviewed and approved

Committee.

the

included

description of

implementation

of

will

extended addressing described

you

specification

design

1983).

which

PDP-10

the

policy on making

the machine

documentation

than

are

|II

to meet both

(AA-H391A-TK with June 1982

Addressing

the description of

is

changes

description of

Processor Reference Manual
AD-H391A-T1 installed).

and

such

the Jupiter

order

our

to

them endlessly.

that

reevaluate

at

changes

specifications.

phase of
In

some

taken

sources:

o

KCI0O

we made

incomplete

requirement

if

clearly
In

design.

following

My memo on

or

others,

and we can debate

must

in

acceptable minutes

the hardware design
and

lax

architecture.

aggressive performance goals.

performance goals

functionally

rather

PDP-10

meetings.

There are probably other

changes

|10

PDP-10 architecture

the architecture based on ambiguous

the

UHLER at

Rosen

Subject:

During

Uhler

of

the

functional

normal

and

Page 2

exception

handling

second-guessing why

also

include minutes

must
a

be

included.

change was

of

made,

To avoid

later

problems

suggest

that

the

|

the discussion of

the change.

As in the past, we will consider
adding
Changes
this date to the machine on a case-by-case basis.
It

should be pointed out

require

extensive

difficult
changes

to

to change

that

hardware

than microcode,

the architecture

received

some performance goals will
support.

later

of

change

Because

the cost

of

hardware

making

on may be quite high.

after

probably
is more

repeated

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