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ISAHOSTLD
movep
#%0101000000011000,x:M_HPCR
bra
<HDI08CONT
HC11HOSTLD
movep
#%0000001000011000,x:M_HPCR
A-8
; If MD:MC:MB:MA=1100, go load from ISA HOST
; Configure the following conditions:
; HAP
= 0 Negative host acknowledge
; HRP
= 1 Positive host request
; HCSP
= 0 Negatice chip select input
; HDDS
= 1 Dual strobes bus (RD and WR)
; HMUX
= 0 Non multiplexed bus
; HASP
= 0 (address strobe polarity has no
;
meaning in non-multiplexed bus)
; HDSP
= 0 Negative data stobes polarity
; HROD
= 0 Host request is active when enabled
; spare = 0 This bit should be set to 0 for
;
future compatability
; HEN
= 0 When the HPCR register is modified
;
HEN should be cleared
; HAEN
= 0 Host acknowledge is disabled
; HREN
= 1 Host requests are enabled
; HCSEN = 1 Host chip select input enabled
; HA9EN = 0 (address 9 enable bit has no
;
meaning in non-multiplexed bus)
; HA8EN = 0 (address 8 enable bit has no
;
meaning non-multiplexed bus)
; HGEN
= 0 Host GPIO pins are disabled
; Configure the following conditions:
; HAP
= 0 Negative host acknowledge
; HRP
= 0 Negative host request
; HCSP
= 0 Negatice chip select input
; HDDS
= 0 Single strobe bus (R/W~ and DS)
; HMUX
= 0 Non multiplexed bus
; HASP
= 0 (address strobe polarity has no
;
meaning in non-multiplexed bus)
; HDSP
= 1 Negative data stobes polarity
; HROD
= 0 Host request is active when enabled
; spare = 0 This bit should be set to 0 for
;
future compatability
; HEN
= 0 When the HPCR register is modified
;
HEN should be cleared
; HAEN
= 0 Host acknowledge is disabled
; HREN
= 1 Host requests are enabled
; HCSEN = 1 Host chip select input enabled
; HA9EN = 0 (address 9 enable bit has no
DSP56367
MOTOROLA
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