Vector Graphic Prom Ram III User manual

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U)i:=I) IilAnUAL

PRO'1/RAM III BOARD
Revision 1
and
PRCM PROORAMMING PR(X;RAM
Revision 1
USERS MANUAL
Revision B
June 13, 1980
Copyright 1980 vector Graphic Inc.

Copyright 1980 by vector Graphic Inc.
All rights reserved.
Disclaimer
Vector Graphic makes no representations or warranties with respect to the
contents of this manual itself, even if the product it describes is covered
by a warranty or repair agreement. Further, Vector Graphic reserves the
right to revise this publication and to make changes from time to time in
the content hereof without obligation of Vector Graphic to notify any person
of such revision or changes, except when an agreement to the contrary
exists.
Revision Numbers
The date and reVlSlon of each page herein appears at the bottom of each
page. The revision letter such as A or B changes if the manual has been
improved but the product itself has not been significantly modified. The
date and revision on the Title Page corresponds to that of the page most
recently revised. When the product itself is moclified significantly, the
product will get anew revision number, as shown on the manual's title page,
and the manual will revert to revision A, as if it were treating a brand new
product. THIS MANUAL SHOULD ONLY BE USED WITH THE PROOUcr(S) IDENTIFIED ON
THE TITLE PAGE.
Rev. l-l-B 6/13/80

PRCM/RAM III Board Users Manual
REPAIR AGREEMENT
The PROM RAM III Board sold hereunder is sold "as is", with all faults and
without any warranty, either expressed or implied, including any implied
warranty of fitness for intended use or merchantability. However, the above
notwithstanding, VECTOR GRAPHIC, INC., will, for a period of ninety (90)
days following delivery to customer, repair or replace any PROM RAM III
Board that is found to contain defects in materials or workmanship,
provided:
1. Such defect in material or \\Qrkrnanship existed at the time the
PROM RAM III Board left the VECTOR GRAPHIC, INC., factory;
2. VECTOR GRAPHIC, INC., is given notice of the precise defect
claimed within ten (10) days after its discovery;
3. The PROM RAM III Board is pranptly returned to VECTOR GRAPHIC,
INC., at customer Is expense, for examination by VECTOR GRAPHIC, INC., to
confirm the alleged defect, and for subsequent repair or replacement if
found to be in order.
Repair, replacement or correction of any defects in material or \\Qrkmanship
which are discovered after expiration of the period set forth above will be
performed by VECTOR GRAPHIC, INC., at Buyer's expense, provided the PROM RAM
III Board is returned, also at Buyer's expense, to VECTOR GRAPHIC, INC., for
such repair, replacement or correction. In performing any repair,
replacement or correction after expiration of the period set forth above,
Buyer
will be charged in addition to the cost of parts the then-current
VECTOR GRAPHIC, INC., repair rate. At the present time the applicable rate
is $35.00 for the first hour, and $18.00 per hour for every hour of work
required thereafter. Prior to commencing any repair, replacement or
correction of defects in material or \\Qrkrnanship discovered after expiration
of the period for no-cost-to-Buyer repairs, VECTOR GRAPHIC, INC., will
submit to Buyer a written estimate of the expected charges, and VECTOR
GRAPHIC, INC., will not commence repair until such time as the written
estimate of charges has been returned by Buyer to VECTOR GRAPHIC, INC.,
signed by duly authorized representative authorizing VECTOR GRAPHIC, INC.,
to camnence with the repair v,ork involved. VECTOR GRAPHIC, INC., shall have
no
obligation to repair, replace or correct any PROM RAM III Board until the
written estimate has been returned with approval to proceed, and VECTOR
GRAPHIC, INC., may at its option also require prepayment of the estimated
repair charges prior to camnencing work.
Repair Agreement void if the enclosed card is not returned to VECTOR
GRAPHIC, INC. within ten (10) days of end consumer purchase.
Rev. I-l-B 6/13/80

PRCM/RAM III Board Users Manual
Rev. 1-1-B 6/13/80

PROM/RAM III Board Users Manual
TABLE OF CONl'ENl'S
Section
Repair Agreement
Table of Contents
I. Introduction
1.1
1.2
Specifications. l1li II. '* "" Ill •• "e "''' •. ", 0lil l!I 0 ~.I.I) ~ ~. "". lJ>"."" a •••• 1-1
Description of the PROM/RAM III Board ••••••••••••••••••••••••• 1-3
II. Users Guide
and Use.,. III 0 " It • CI flI "" Q '" .e '" • ~ III •• " ~ D .2-1
Block Swap ••••••••••• e "" • Il1o oft '" ." '!I • l1li Ii) 0 ft ofl e fI) ~ .e IJ!I ~ 1Il "" ••••• III 11/1 2-10
Disable Power-on/Reset Response ••••••••••••••••••••••••••••••• 2-l0
RAM Ill .. Ill e ·0 ,. III •• 0 • e .. l!I I!I ..,. til '" ,. It 2-1
PROM Selection
Block Aand Block B - General •••••• ~A.o ••••••••••••••••••••••• 2-2
Block. Ae • It It eIII III III lJIo 1.1) el!'l l!I I!Il •• !II a III ••• Il!l 2-3
Block B. III .. ill 0III 0 II ,. oe 0 <III lit .. '" III 2- 3
Figures 2&3 - Examples of Block B Configurations •••••••••••• 2-5
Block Select Addressing ••••••••••••••••••••••••••••••••••••••• 2-6
PROM/Scratchpad
Memory Invert ••••••••••••••••••••••••••••••••• 2-6
RAM Memory Address Select in Block B •••••••••••••••••••••••••• 2-7
Disable 3K of Address Space in Block B •••••••••••••••••••••••• 2-7
2.10 Power-on/Reset Jump - Description ••••••••••••••••••••••••••••• 2-8
2.11 Use PRESET or POC for Power-on/Reset Jump ••••••••••••••••••••• 2-8
2.12 Phantom Generated if Power-on/Reset ••••••••••••••••••••••••••• 2-9
2.13 Jump to PROM/RAM III Board if Power-on/Reset •••••••••••••••••• 2-9
2.14
2.15
2.16 .MWR.ITE eo l1li l!'l .. " " II '" tll III e" 1111 ••• "' '" 2-10
2.17 Wait State Generation ••••••• o •••••• ee.o.~~.o •••• o ••••••••••••• 2-11
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
Tables 1, 2, and 3 ••••••• * •••••• tI:\I •• ee ".II'I •••••••••••••••• 2-12
2.18 Programming a PROM -Normal Procedure ••••••••••••••••••••••••• 2-l3
2.19 Writing a PROM Programming Program •••••••••••••••••••••••••••• 2-l6
2.20 Re-assembling the PROM Programming Program •••••••••••••••••••• 2-l7
2.21 PROM Programming Program Listing ••••••••••••••••••••••• 2-l8 -2-24
III. Theory of Operation
3.1 Addressing ell II •III • " • III III III 'Il II eo '" ••• fl) " ••• 11/1 •• II1II ••••••• e •••.• 3-1
3.2 ra.ta Input/OUtput •• ' II I(l • '" III I!lI e II oS '" lit ••••••• It ••• .: 3-2
3.3 Control Signals ... " •••••••••••••••••• "'lIllill ••• ft •••••••••••••••••••• 3-2
3 .. 4 PRCl'1. Pr<:lSJramming II ••••• III CIt III III 8 fl ..,. 1/11 l'I' .. III .. III 3-3
3.4 J?c)~r Supplies it III @ It." «I III '" "". '" • ~ -@ lit 3-4
Rev. l-l-B
6/13/80

J.V.
PROM/RAM III Board Users Manual
Schematics
J3c)ard r.a.you t" • IIIl • .. s ,. " ~ "oil .. 0 l' '" e '" .. /II ., l!I I!l e _ «!l "" <'lIl • II .. " " • " " • 4-1
Schematic Errata. '" ""0" III 4'lI '" " " " " "" "e.. e.. l1li l1li '" " " "" I!l '" ........ • 4-2
Schern.atic" «Il " " ,. ••• e ., "" " • '" II " • l1li III .. "" •• 0 " •• !III '" "" '" 0& "" .. '" 4-3
Rev. 1-1-B 6/13/80

PRCM/RAM III Board Users Manual
Rev. I-l-B 6/13/80

PRCM/RAM III Board Users Manual
I. INrROOOcrION
1.1 SPECIFICATIONS
Bus Compatibility
Memory Capacity
PRCMProgramming
PRCM Programming Program
PRCMs Included with Board
Memory Speed
Memory Types
Board Addressing
Addressing Options (jumper)
Standard Addressing
Standard Location of
Systems Monitor PRCM
(continued on back)
Rev.
l-l-B 6/13/80
S-lOO
RAM: lK, included with the board
PRCM: Sockets for 12 PRCMs.
Can program 2708 or 2704 EPROMs
Listing included in manual
Executable
version on MCOS System Diskettes
8.4 and later.
NONE
RAM: 300 ns.
PRCM: User selected (450 ns. typ)
RAM: 2114 static
PROM: 2708 (lK each) or 2704 (1/2K each)
Two blocks (A and B) are separately
addressed
Block A has 8 PRCM sockets
Block B has 4 PRCM sockets and lK RAM
Base address of the two 8K blocks
Block B PRCM at top or bottom of block
Address of lK RAM within remaining 4K
Disable unused 3K, for use by other boards
Block
A: disabled
Block B base address: EOOOH
Block B PRCMs: EOOOH - EFFFH
Block B RAM: FCOOH - FFFFH
Block B disabled 3K: FOOOH - FBFFH
EOOOH
1-1

Power-on/Reset Jump
Power-on/Reset JlllTlP Options.
(jrnnper)
Standard Power-onjReset
Jrnnpers
MWRITE
Wait state generation
Bus load
Card extractors
Power
1-2
PRCM/RAM III Board Users Manual
PRESET or POC causes jump to board
Use PRESET or POC
Jump to first instruction of Block A or B.
Disable phantom generation
Disable jump to on-board memory
POC is used
Jump to beginning of Block B
Phantom and j
lllTlP to on-board both enabled
Jumper option to generate MWRITE on board
Standard: option not enabled
Jumper option to generate one wait state
each time board is addressed
Standard: option not enabled
1 Tl'L load on all inputs
Standard
+8Vdc @450 rnA (Typ)
+18Vdc @(depends on quantity of PI01)
-18Vdc @(depends on quantity of PRCM)
Rev. 1-1-B 6/13/80

PRCM/RAM III Board Users Manual
.... 2 DESCRIPI'ION OF THE PRCM RAM III BOARD
Vector Graphic's PROM RAM III Board is a versatile, S-lOO bus compatible,
high density meI1Dry board combining the memory technologies of erasable
programmable read only memories (EPRCMs) and high speed random access memory
(RAM) •Of unique value, one of the PRrn sockets on the board can be used to
program a 2708 or 2704 EPROM, enabling any owner to create PROM-based
software for use on this board or in any other microprocessor device. lK of
RAM is provided on the board, but no PRCMs are included with purchase. The
software which is used to program PROMs is provided as a listing in this
manual, and is included on disk with all Vector Graphic systems shipPed with
this board.
By combining the use of MSI decoding logic and unique addressing features, a
wide range of applications requirements may be met by this memory board.
The addressing flexibility is as follows. The board offers two
independently addressable 8K blocks of memory (A and B). You use jumpers to
specify the two separate 8K addressing spaces assigned to these blocks.
Block A can be used for up to 8K of PRrn. Block B contains lK of on-board
RAM plus up to 4K of PRrn.
For block B, you use jumpers to specify whether the PROM is at the top or
the bottom of the 8K allocation, and then, within the remaining 4K, where
the lK of RAM is addressed. Once this is done, there are also jumper
options for DISABLING some or all of the remaining 3K of addressing space
allocated to block B, so that other boards in the system can use those
addresses.
The addressing spaces are fully utilized if 2708 1K PRCMs are used. If 2704
1/2K PROMs are used, then every other 1/2K of PRCM allocation will be used,
with 1/2K gaps between. Other features offered by the board are: jump on
power-on or reset to on-board memory, with phantom generated to temporarily
disable other memory boards, and a jumper option to use PRESET instead of
POC to cause this jump; jumper option for on-board generation of the S-lOO
MWRITE signal; and a jumper option to generate a one-cycle wait-state each
time the board is addressed.
Full buffering of all inputs and outputs is provided to minimize loading of
the system S-lOO bus to at most one 'ITL load. on-board p:Jwer regulation and
filtering is provided using Ie regulators and heat sinks for power
dissipation. careful attention to gocx:1 design practice and an awareness of
the need for flexibility has resulted in a reliable board useful in a wide
variety of systems and applications.
Rev. l-l-B 6/13/80
1-3

1-4
PRCM/RAM III Board Users Manual
Rev. I-l-B 6/13/80

PRCM/RAM III Board Users Manual
II. USERS GUIDE
This Users Guide begins with a description of the amount and kind of PRCM
which can be used on this board, followed by a description of the RAM
included with the board, then a' detailed description of the various options
you have for addressing the PROMs and the RAM. Read it before attempting to
re-jumper the board addressing. Following this section are a description of
each of the jumper options possible on the board, including addressing
options, po~r-on/reset jump, MWRITE input, and wait state generation. The
diagrams
of jumper pads show each of the pads as it is pre-jumpered at the
factory. The guide ends with instructions for operating the PROM
prograrraning software provided with the board, as well as instructions for
writing your own if desired. The listing of the program is provided.
2.1 PRCM SELECI'ION AND USE
A maximum of 12K bytes (where K=1024) of 2708 tyPe PROMs may be installed
in available sockets on the board. NO PRCMS ARE INCLUDED WITH PURCHASE OF
THE BOARD ALONE. Jumpers are used to determine where the PROMs are
addressed.
The following discussion assumes that 2708 type PROMs (having lK ·of 8-bit
bytes each) are used. If 2704 PROMs (having 1/2K bytes each) are used, the
issues are the same~ the only difference is that wherever a 2704 PROM is
used, there will be 1/2K bytes of PRCM accessible by the system, followed
immediately by a1/2K gap which will not contain any memory at all.
The numbers 2708 and 2704 are Intel generic part numbers. Many other
manufacturers make equivalents, with 2708 or 2704 as part of their
proprietary part number. All 2708 or 2704 pin for pin equivalents can be
used on this board.
2.2 RAM
In addition to the PROM sockets, there is lK of static RAM on the board,
which IS included with purchase of the board alone. Jumpers are used to
detennine where this lK of RAM is addressed.
Rev. I-l-B 6/13/80
2-1

PRCM/RAM III Board Users Manual
2.3 BLOCK A AND BICCK B - GENERAL
TO begin specifying the addresses for the meIOC>ry, there are tv.o separately
addressable blocks of memory space available on the board, called blocks A
and B. Jumpers are used to specify what the base address is for each of
these bNo blocks, within a64K total memory space. Alternately, one (or
both) blocks can be disabled canpletely. Jumper area F is normally used to
specify the base address of (or disable) block A and jumper area E is
normally used to specify the base address of (or disable) block B. If a
block is not disabled, then that block will occupy exactly 8K bytes of
memory, beginning at its base address. This is true for both blocks, as
shown in Figure 1.
B'lock B
FIGURE 1
...... -- ... At2000H
Bloc'k A
Start i ng A ddre:ss B
~:=::~--1 Starting Address A
Note that both blocks together occupy 16K of men:ory. However, there are
only 12 sockets for PRCMs, and only lK of RAM on the board, totalling 13K.
What happens if the processor addresses rnerrory in the remaining 3K portion?
This memory space is NO!' necessarily empty. A set of jumpers is provided
which in effect spec'ify that the unused 3K, within the 16K, is not on the
PRCM RAM III board at all, and therefore may be used on other boards.
It must be e:nphasized that except for the 3K specified as unused by jumper,
t..'1e addresses assigned to the board for blocks A and B cannot be used by any
other board, even if some of the PROM sockets are left empty. However,
remember
that you may choose not to use one (or both) of the blocks at all,
by disabling it completely in jumper areas Eand F. If you do this, then
the corres};X)nding memory space CAN be ass igned to another board, and no
space is was ted.
2-2
Rev. l-l-B 6/13/80

PRCM/RAM III Board Users Manual
If the jumpers in area G are switched from the way the board is normally
shipped, then the base address of block A will be controlled by jumper area
E and the base address of block B will controlled by jumper area F, ins tead
of the other way around. If this is done, then the address which is
accessed for power-on jump will also be switched, becaning the first address
in block A instead of the first address in block B. This is the pUrPOse for
using this option. (See Section 2.14) For simplicity of language, the
Users Guide is written assuming that jumper area G is left as manufactured.
2.4 Br..cx:::K A
Block A refers to the 8 PROM sockets at the top of the board (labeled a
through 7). Insert PROMs which you want in block A into these sockets.
Socket a corresponds to the IK block beginning at the base address of block
A. Socket 1 corresponds to the next lK and so on, as shown in the following
table:
Hexadecimal Address
Relative to Base Address ("A" )
of Block A
A+ lCOOH
A+1800H
A+1400H
A+ lOOOH
A+ COOH
A+ 800H
A+ 400H
A
Socket
7
6
5
4
3
2
1
o
Jumper area F is normally used to determine the base address of block A, or
to disable block A. When the board is sold, jumper area F is pre-wired to
disable block A. No particular base address is thus specified until you
install the jumpers.
2.5 Br..cx:::K B
Block B includes the lower four PRCM sockets on the board, labeled 8 through
11. The other 4K in block B is filled with the lK of RAM on the board, plus
the 3K of address space which can be, at you discretion, returned for use by
Rev. I-l-B 6/13/80
2-3

I
PRCM/RAM III Board Users Manual
other boards. The way you specify the address spaces wi thin block B is as
follows: First, you specify the base address of Block B using jumper area E
(or you specify in area E that the block is disabled). If it is not
disabled, then you use jumper area J to specify whether the 4K of PROM
occupies the top or the bottom 4K of the block. These are the only two
choices. The board is pre-jumpered so that the PROM occupies the lower 4K.
Then, you specify using jumper area I which lK within the other 4K is used
for the on-board RAM. Lastly, you specify using jumper area H whether one
of more of the last three lK blocks is to be returned for use by other
boards. (Normally you specify that all three of them are returned.)
Two typical configurations of Block B are shown in figures 2 and 3. Figure
2 is the standard - the one for which the board is pre-wired. Since in the
pre-wired version, block B begins at EOOOH, Figure 2 shows that the
standard address for scratch-pad RAM is FCOOH, and the standard address for
the System1s Monitor PROM(s) is EOOOH. Figure 3shows the result of putting
the PROM in the upper 4K and specifying that the RAM occupy the second lK
portion.
2-4
Rev. l-l-B 6/13/80

;B
~
H
H
H
i
OJ
~
(1)
t"l
Ul
::::0
~
C)
-0
~
;;0
l--'
CJ
:;;-
[pnOM
FIGURE 3
EPROM
FIGURE 2
IStarling -
L -Alhlress n
I
" •• r ....... 1
1-Bt2000"-1 .
I------:R::A~~~ ---1'1 _B t)CUUlt
.. ........-
• DISK _ 8'1800H
VIDEO - 8·1408H ""i
VIDEO \-8'1000H-1= . VIOEO •'. ~
r B'OCOOH-t- VIDEO ~
_. "
B'0800H- /lAM ;;
8.0400H-1 DISK_
•• ·r
,-
Cl
n::
<C
c:;)
co
I
c:;)
0::
CL
.-.-
-
CJ
l--'
I
l--'
J:,
~
l--'
~
o
f8
.<:
•
~
U1

2.6 BLOCK SELECl' ADDRESSING DISABLE
Jumper areas: E & F
PRCM/RAM III Board Users Manual
8A3'O A15
oA 14 0 0 DISA8LE
BA2
0
A14
°A130
SAl 0 A13
Jumper names: Al3, AD, Al4, Al4, Al5, Al5 := address lines
BAl, BA2, BA3 := block B address pads
BB1, BB2, BB3 := block A address pads
NOTE: The second letter in the block B address pads is "A", while the
second letter in the block A address pads is "B". This occurs because
historically, the pads were natred before it was decided to manufacture the
board with the "block swap" jumpers in area G reversed.
Function: Address lines AI3, Al4, Al5 form the most significant bits of the
address fran the cpu. These three bits can select any of 8 possible 8K
blocks of mem::::>ry in a64K mem:n::y space.. See table 1.,
Options: Table 2 te.lls you what jumpers to connect to specify any
particular 8K block starting address.
Jumper area: J
J~
Function: '!be pre-wired'connection specifies that the low order 4k bytes of
block B consists of PRCM. This jumper area is used to reverse this, putting
the PRCM at the high end of block. B.
Options: If the PROM is to occupy the high order addresses of this block
cut the. jumper fran 6 to 7and tie 6 to 8.
2-6
Rev. I-l-B 6/13/80