Lexicon 960L - DSP 56301 Expansion Port Memory Map

Lexicon
7-37
Upon receipt of this program the 56301 initializes the three T-MIX devices and loads a program into the Z-
80 dual port RAMs. The 56301 releases the Lexichips and Z-80s from the reset state by driving the
DBRD_RSTn/ signals high and the Z80_INITn/ signals high. At this point the Z-80s execute their startup
code from the dual port RAMs and pass messages back to the 56301 using the DB_MAS_INTn/ interrupt
signals and the dual port RAM interrupt vector locations. The Z-80s will illuminate the Z-80 LEDs under
software control to indicate their startup success or failure. The 56301 then receives commands from the
host to detect which cards are resident on the 960L I/O bus. After reporting this information to the host
processor through the PCI bus the 56301 is commanded by the host to initialize the cards resident on the
960L I/O bus.
DSP 56301 Expansion Port Memory Map
Address Attribute
Number
Address Resource
- $FF0000 - $FFFFFF Internal Decodes
AA1 $D00400 - $FEFFFF -
AA1 $D00000 - $D003FF Boot PROM
$9D8000 - $CFFFFF -
AA1 $9D4002 - $9D7FFF -
AA1 $9D4001 T-mix #3 Control Data Port
AA1 $9D4000 T-mix #3 Control Pointer Port
AA1 $9D3002 - $9D3FFF -
AA1 $9D3001 T-mix #2 Control Data Port
AA1 $9D3000 T-mix #2 Control Pointer Port
AA1 $9D2002 - $9D2FFF -
AA1 $9D2001 T-mix #1 Control Data Port
AA1 $9D2000 T-mix #1 Control Pointer Port
AA1 $9D1800 - $9D1FFF -
AA1 $9D1000 - $9D17FF Dual Port SRAM #2
AA1 $9D0800 - $9D0FFF -
AA1 $9D0000 - $9D07FF Dual Port SRAM #1
AA1 $9C0001 - $9CFFFF -
AA1 $840000 - $9BFFFF -
AA2 $83C400 - $83FFFF -
AA2 $83C000 - $83C3FF T-mix #1 DSP Port
AA2 $83A400 - $83BFFF -
AA2 $83A000 - $83A3FF T-mix #2 DSP Port
AA2 $838400 - $839FFF -
AA2 $838000 - $8383FF T-mix #3 DSP Port
AA2 $800000 - $837FFF -
$308000 - $7FFFFF -
AA0 $301A00 - $307FFF -
AA0 $301800 - $3019FF IOBUS SLOT #5-
AA0 $301600 - $3017FF IOBUS SLOT #4
AA0 $301400 - $3015FF IOBUS SLOT #3
AA0 $301200 - $3013FF IOBUS SLOT #2
AA0 $301000 - $3011FF IOBUS SLOT #1-
AA0 $300000 - $300FFF -
$010000 - $2FFFFF -
$0 - $00FFFF Internal Decodes
Z80 Memory Map