DIGITAL-LOGIC MICROSPACE MSM286 Series Technical User's Manual page 60

DIGITAL-LOGIC AG
(AH)=22h:
(AH)=23h:
(AH)=24h:
(AH)=25h:
(AH)=26h:
(AH)=27h:
(AH)=28h:
(AH)=29h:
(AH)=2Ah-7Fh:
(AH)=80h-FFh:
(AH)=00h:
Input:
Output: (BX:AX)
Example:
(AH)=01h:
(BL) = 0 - Get Free Memory Above 1MB.
Input:
Output: (AX)
(DX)
(BL) = 1 - Allocate Memory Above 1MB from bottom.
Input: (DX)
Output: (AX)
(DX:BX)
Example:
(BL) = 2 - Block Memory Move.
Input: (CX)
(DS:SI)
(ES:DI)
Output:
Example:
APM Enable/Disable Secondary Storage Devices
APM Enable/Disable Parallel Ports
APM Enable/Disable Serial Ports
PCCARD Socket Services Re-director
(Reserved for Chips and Technologies)
Hook external PS pin interrupt
Miscellaneous hooks and functions
Context Switch functions
Reserved for Chips and Technologies
Reserved for OEMs.
Get 32-Bit SuperState Block address.
None
= 32-bit value of SuperState Block
If the Superstate block were at F000:10 (in shadow RAM, then the following
sequence would return with BX:AX = 000F:0010.
MOV AH,0
INT 1Fh
Memory Management functions.
None
= Free memory above 1MB in 1k blocks.
= Total memory above 1MB in 1k blocks.
= Amount requested in 1k blocks.
= Amount of memory allocated in 1k blocks.
= 32-Bit address of memory block.
The largest block of memory less that or equal to the amount requested is
returned. AX is equals zero if there is no free memory.
If the user request 8k, then:
MOV AH,1
MOV BL,1
MOV DX,8
INT 1Fh
CMP AX,8
JB Error
= Words to move.
= 32-Bit address of source memory block.
= 32-Bit address of destination memory block.
None
To move memory 512 bytes (128 words) at 1234:5678 to 32Meg (PCCARD
card), then:
MOV AH,1
MOV BL,2
MOV CX,80h
MOV SI,0001h
MOV DS,SI
MOV SI,79B8h
MOV DI,0200h
MOV ES,DI
MOV DI,0000h
INT 1Fh
; function 0
; do system call
;function 1
;subfunction 1
;ask for 8k
;did we get < 8k?
;function 1
;subfunction 2
;128 words
;1234:5678 = 0179B8
; as a 32-bit value
;DS:SI = source
;32Meg has 6 zeroes
;ES:DI = destination
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MSM286 Manual V6.4