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@Section(Microware Model 32 Prom Programmer/Emulator)
                      
@Begin(Comment)
                      EUCSD Operating Instructions
                               M. R. King
                              August 1980
@end(Comment)

This section describes the Microware Model 32 PROM programmer and
emulator as modified by the author for use in the Edinburgh Universities
Department of Computer Science.  Large parts of this section are taken
from the manufacturers original documentation.


@SubSection(General Description)

The instrument consists of the following:

@Begin(Itemize)
A simple keypad consisting of a hexadecimal pad (0 to F) and three
other keys on the right hand side; Function (red), Address and Data
(both yellow).

A three hexadecimal digit display that indicates the address, data or
current entry being keyed.

A plug in personality module which determines the Family of PROMs to
be emulated or programmed.  This carries the following:

@Begin(Itemize)
A "configurator plug" which determines the specific type PROM to
be emulated.  This is a 14 pin DIL module situated on the top left
of the personality module.

A DIL socket situated on the underside of the personality into
which a ribbon cable may be pluged.  This cable carries a second
plug which is used in place of the emulated PROM.

A second configurator plug which determines the specific type of
PROM to be programmed.  This is a 16 pin DIL module situated in the
top centre of the personality module.

A zero insertion force socket used to hold PROMs during
programming operations.
@End(Itemize)

At the rear of the instrument is a mains supply switch and an
EIA/RS232 socket providing a serial interface to a host computer.

Internally the instrument conatins a 4k byte memory referred to as
the 'emulator memory'.  This holds the contents of a PROM being emulated
or future contents of a PROM to be programmed.  It may be loaded from a
host computer and edited using the hexadecimal keypad.

@End(Itemize)

@SubSection(Warning)

@Begin(Enumerate)
Switch off the mains before changing or removing the plug in
personality modules.  This warning does not apply to the configurator
plugs.

Ensure configurator plugs for the correct PROM are inserted
correctly before inserting PROMs into the programming socket or the
emulation cable into any other equipment.  Note the instrument may be
configured to program PROMs of one type and emulate a different type.

Make sure configurator plugs, emulation cables and PROMs are
inserted the right way round.

Make sure any special functions have been entered correctly before
trying to use them.
@End(Enumerate)

@SubSection(Operating Instructions)

Any one of several functions is selected by first keying the Function
key followed by another key corresponding to the required function.  The
possible functions are as follows:
@Begin(FileExample, LeftMargin +0)

0 Set all 00            Clears all of the emulator memory to 00 and then
                        goes to the enter data function at address 000.

1 Set all FF            Sets all of the emulator memory to FF and then
                        goes to the enter data function at address 000.

2 Read                  Copies the contents of the PROM into the
                        emulator memory and then goes to the enter data
                        function at address 000.

3 Verify                Compares the contents of the PROM and the
                        emulator memory without changing either.  If
                        they are equal it then goes to the enter data
                        function at address 000.  If a difference is
                        found, the display flashes the address and
                        differing PROM contents alternately.

4 Test Blank            Checks to see if the PROM contents are in their
                        unprogrammed state ( all FF).  The result is the
                        same as the verify function.

7 Special Function.     Executes the 'Special Function' entered using
                        the 'C' function.  See the section of this
                        manual 'Using special functions'.

8 Program               Programs all of the PROM with the contents of
                        the appropriate area of emulator memory.  It
                        then performs the verfiy function and goes to
                        the enter data function at address 000.

9 Fast Program          This is the same as the program function except
                        that for PROMs requiring repetative passes
                        through the PROM, just 10 of the required passes
                        are performed.  This is used to speed throughput
                        in applications not requiring long retention of
                        the PROM contents.

A Serial input          Loads the emulator memory from a host computer.
                        See the section of this manual 'Loading From A
                        Host Computer'.

B Serial output         Sends the contents of emulator memory to a host
                        computer.  See the section of this manual
                        'Sending To A Host Computer'.

C Special entry         Enters special function data into the
                        instrument.  See the sections of this manual
                        'Using special functions' and 'Entering memory
                        contents'.

D Development system    Places the instrument under the control of a
                        host computer.

E Enter Data            Enables entry and editing of data into the
                        emulator memory.  See the section of this manual
                        'Entering memory contents'.

F Emulate               Emulator memory acts as a PROM connected to the
                        emulator header plug.  The display is blanked to
                        indicate this mode.

@End(FileExample)

@Paragraph(Warning)
Note that some functions cause the whole of emulator memory to be
changed.  Great care should be taken to select only the required
function after pressing the red Function key.

@SubSection(Entering memory contents)

The enter function is selected by keying Function followed by either
C for special function entry or E for emulator memory entry.  It enables
data to be keyed into memory or the contents of memory to be examined or
changed.  This function is used as follows:

@b[Entering Data]
@Begin(Enumerate)
When the enter function is first selected the 'current address' will
be set to 000 and the contents of that location displayed.

Data may then be entered. as soon as a hexadecimal key is pressed
the display changes to indicate the current entry.  Note that
leading 0's need not be entered.

No 'Rubout' key is provided because errors may be corrected by
simply rekeying the right data, the wrong ones being shifted left
off the display.

When the correct data entry is displayed it may be entered into the
current address by typing the yellow Data key.  The current address
is then incremented and the contents of new address displayed.
@End(Enumerate)
@b[Changing the current address]

The current address at which data is entered into memory may be
changed as follows:

@Begin(Enumerate)
Key in up to three hexadecimal digits to form the required address.
leading 0's need not be entered.  Only the last two digits are
displayed but the other will still be remembered as part of the
required address.

An incorrect entry can be replaced by simply keying in the correct
three digits again.  Be careful to correct all three digits, not
just the displayed ones.

When the address entry is correct press the yellow Address key which
will display the new current address.  When this key is released the
contents of this location will be displayed.
@End(Enumerate)
@b[Examining Data and Addresses]

The data at the current address is always displayed until a new
entry from the keyboard is started.

Succesive memory locations can be examined by repeatitive keying of
the yellow Data key, which only steps the current address if no data
entry is made.  Changes to the data are made only when new data is
keyed before pressing the yellow Data key.

Pressing the yellow Address key without a data entry first causes
the current address to be displayed until the key is released.  When
released the display reverts to the contents of the current
location.