Texas Instruments 990 Operation Manual page 222

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945255-9701
The MI, SW, and RC subcommands set up the control information for an SN74S287 PROM and
for the first 4 bits of each word of a 256 word block of memory. The MB and RB
sub commands specify a transfer of data between PROM word addresses 0 through FF
16
and
memory addresses 0 through 1 FF
16'
The MI subcommand defines the memory data configuration ,as follows:
Loop level
Bit increment
Number of iterations
Initial bit displacement
=
I
=
lO16
=
lO016
=0
TheRI subcommand defines the PROM data configuration as follows:
Loop level
Bit increment
Number of iterations
Initial bit displacement
=
I
=4
=
100
16
=0
The SW command defines the bit string width for memory and PROM to be 4.
The RC subcommand defines the following PROM characteristics:
High/low level output
Pulse width
Number of retries
Duty cycle
Programmable bits
=0
=2
=0
=
19
16
=
I
The user should insert the PROM containing the data configuration to be transferred to memory
in the PROM programming module. The PROM data may be displayed by setting the toggles to
display PROM with the TS subcommand. The display is printed when the GO subcommand is
entered .
• PP,
rs,
0, l, 0, 0
.PP,t:;1l
~oooo. 00= 00
R0004.00=0:3
R0008.00=OF
R OOOC. 00= 01=
ROOl O. 00= OF
ROOl4.00=OF
ROOlB.OO=OF
ROOlC.OO=OF
R0020.00=OF
R0024.00=OF
R0028.00=OF
R002C.00=OF
R0001.00=00
ROO 05 • 0 0= 06
R0009.00=OF
ROOOD.OO=OF
ROOll.OO=OF
R0015.00=OF
RO 01'3. OO=OF
ROOlD.OO=OF
R0021.00=OF
R0025.00=OF
R0029.00=OF
R002D.OO=OF
R0002.00=00
R0006.00=03
ROOOA.OO=OF
ROOOE.OO=OF
RO.Ol2.00=OF
R0016.00=OF
ROOIA.OO=OI=
ROOIE.OO=OF
R0022.00=OF
R0026. OO=OF
R002A.00=OF
R002E.00=OF
11-4
ROO 03. 0 0= OE
ROO 07 • 0 0= 07
ROO 011. 0 0= OF
ROOOF.OO=OF
R0013.00=OF
ROOt7.00=OF
ROOlB.OO=OF
ROOIF.OO=OF
R 1)02:3.00= OF
R0027.00=OF
ROI)2B.00=OF
ROI)2F.00=OF
Digital Systems Division .