91 lines
1.7 KiB
Z80 Assembly
91 lines
1.7 KiB
Z80 Assembly
; Prints a string
|
|
; Arguments: Takes a pointer in HL to a null-terminated string
|
|
; Clobbers: A, BC, HL
|
|
.global print
|
|
print:
|
|
ld a, 0
|
|
jp 0xdffd
|
|
|
|
; Gets a free frame of memory
|
|
; Returns: Frame card in C, frame number in HL
|
|
; Clobbers: A, B, DE, IX, IY
|
|
.global get_free_frame
|
|
get_free_frame:
|
|
ld a, 1
|
|
jp 0xdffd
|
|
|
|
; Maps a RAM frame into memory
|
|
; Arguments: Page to map in C, card # in B, bank # in DE
|
|
; Clobbers: A, IX, and C
|
|
.global set_frame
|
|
set_frame:
|
|
ld a, 2
|
|
jp 0xdffd
|
|
|
|
; Creates a new process
|
|
; Arguments: Entry point in HL, page mapping in IY
|
|
; Clobbers: unknown
|
|
.global new_process
|
|
new_process:
|
|
ld a, 3
|
|
jp 0xdffd
|
|
|
|
; Yields to the next process
|
|
.global yield
|
|
yield:
|
|
ld a, 4
|
|
jp 0xdffd
|
|
|
|
; Sends a message to the given mailbox
|
|
; Arguments: Mailbox ID in HL, message pointer in C:DE:IX
|
|
; Returns: 0 in B if message was sent, or 1 if the box was full
|
|
.global mb_send
|
|
mb_send:
|
|
ld a, 5
|
|
jp 0xdffd
|
|
|
|
; Reads a message from the given mailbox
|
|
; Arguments: Mailbox ID in HL
|
|
; Returns: 0 in B if there was a message, or 1 in B if there wasn't
|
|
; message pointer in C:DE:HL
|
|
.global mb_read
|
|
mb_read:
|
|
ld a, 6
|
|
jp 0xdffd
|
|
|
|
; Gets a free mailbox
|
|
; Returns: ID in HL
|
|
.global get_free_mailbox
|
|
get_free_mailbox:
|
|
ld a, 7
|
|
jp 0xdffd
|
|
|
|
|
|
; Sets the given type ID to the given PID
|
|
; Arguments: Type ID in DE, PID in HL
|
|
.global proc_map_set
|
|
proc_map_set:
|
|
ld a, 8
|
|
jp 0xdffd
|
|
|
|
; Gets the value of the given type ID
|
|
; Arguments: Type ID in DE
|
|
; Returns: PID in HL
|
|
.global proc_map_get
|
|
proc_map_get:
|
|
ld a, 9
|
|
jp 0xdffd
|
|
|
|
; Finds the first card with a given type
|
|
; Arguments: Card type in B
|
|
; Returns: Zero in A if a card was found, or nonzero otherwise
|
|
; The ID of the card in L if a card was found,
|
|
; or zero otherwise
|
|
; Clobbers: A and H
|
|
.global find_first_card
|
|
find_first_card:
|
|
ld a, 10
|
|
jp 0xdffd
|
|
|
|
|