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BASIC-SO
RMX/SO BASIC-SO
After you modify BQOPS.ASM and verify the contents
of
the BOOTCM.ASM and
BQBMEM.ASM modules, you are ready to generate your boot loader. To do this,
you must assemble
BOOTCM.ASM and BQBMEM.ASM, and LINK and LOCATE
the resultant object code. The GBOOT.CSD module
will
do this with the SUBMIT
command. Figure F-2
is
a listing
of
the GBOOT .CSD module used with the
BQOPS.ASM module in figure
F-l.
The DATA location and the BOTMEM address must
be
the same.
If
your hardware
configuration uses an
iSBC
SO/20
or iSBC S0/10, each occurrence
of
S30
should be
changed to
S20
or
SID.
After you have generated the boot
loader,
it should be
burned into
PROM and inserted into your CPU board. (See the Universal
PROM
Programming Manual for details)
The
iSBC
SO/10
does not have an onboard clock.
If
your configuration includes a
clock, add the appropriate routines when linking
GBOOT.CSD. (Refer to Appendix
G of the
RMX/80
User's Guide for further information.)
If
you
don't
have a clock
in your configuration, include the dummy clockroutine
CLOCK.OBJ.
ASM80
ASM80
LINK
LOCATE
:FO:BOOTCM.ASM MACROFILE(:FO:) NOSYMBOLS
:FO:BQBMEM.ASM MACROFILE(:FO:) NOSYMBOLS
:F1
: BOT830.LlB(VECRST)
:F1
:RMX830.LlB(START)
:FO:BOOTCM.OBJ,
&
:FO:BQBMEM.OBJ, &
:F1
:
BOT830.
LIB, &
:F1
:DI0830.LlB, &
:F1
:DFSUNR.LlB, &
:F1
:RMX830.LlB, &
:F1
:BOTUNR.LlB, &
:FO:PLM80.LlB
TO
:F1:BQBOOT.LNK MAP PRINT(:F1:LNK.LST)
:F1
:BQ800T.LNK
TO
:FO:BQBOOT MAP PUBLICS PRINT(:F1 :LOC.LST)&
CODE(40H)
DATA(OFD40H)
ST
ACKSIZE(O)
Figure F-2. Sample
Configuration
OBOOT
.CSD
Module
Generating a Boot-Loadable BASIC-80. Once you have determined how to
generate the boot loader that fits your particular
RMX/SO implementation, the bulk
of your work
is
over. Generating
BASIC-SO
is
relatively simple.
There are four steps to generating a boot loadable
RMX/80
BASIC-80: assembling
the
BASCM.ASM and BQMEM.ASM modules, and linking and locating the
resulting
BASIC-SO
into RMXSYS. The GBASIC.CSD module
is
a SUBMIT file
that performs these steps. Figure F-3 shows a listing of the
GBASIC.CSD module
used with the sample configuration.
If
you are using an iSBC
80/10
or
iSBC
SO/20
based system, you need
to
modify the
"S30"
references in the module to
"SI0"
or
"S20"
with the ISIS-II Text Editor.
For
further information about using the Text
Editor, refer to the
ISIS-II User's Guide.
The CODE and START addresses should reflect the addresses
at
the start of system
RAM. The following list shows typical starting addresses:
iSBC80/10or80/10-A
3COOH
iSBC 80/20
3800H
iSBC 80/20-4
3000H
iSBC 80/30
4000H
F-7