chris/open-roms
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adapted to Kick Assembler, some documentation update

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FeralChild64 committed 2019-09-07 12:35:21 +02:00
1 parent ae23dbae7b
commit de27124b4f
198 files changed
+4181 -3976
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c64/basic/under_rom_routines.s
+26 -29
View File
@@ -1,19 +1,19 @@
;; IMPORTANT:
;; These routines lengths cannot be changed without changing
;; the aliases for peek_under_roms, poke_under_roms etc
;; in ,aliases.s.
;; Thus those addresses are expressed using formulae.
// IMPORTANT:
// These routines lengths cannot be changed without changing
// the aliases for peek_under_roms, poke_under_roms etc
// in ,aliases.s.
// Thus those addresses are expressed using formulae.
install_ram_routines:
;; Copy routines into place
ldx #ram_routines_len-1
*
// Copy routines into place
ldx #ram_routines_end-ram_routines_start-1
!:
lda ram_routines_start,x
sta tiny_nmi_handler,x
dex
bpl -
bpl !-
;; Point NMI handler to tiny_nmi_handler
// Point NMI handler to tiny_nmi_handler
lda #<tiny_nmi_handler
sta $FFFE
lda #>tiny_nmi_handler
@@ -23,14 +23,14 @@ install_ram_routines:
ram_routines_start:
;; XXX - Routine order must match that of the KERNAL version of the file.
;; (since it has fewer routines)
// XXX - Routine order must match that of the KERNAL version of the file.
// (since it has fewer routines)
tiny_nmi_handler_routine:
inc missed_nmi_flag
rti
peek_under_roms_routine:
php
; Offset of arg of lda ($00),y
// Offset of arg of lda ($00),y
stx peek_under_roms+pa-peek_under_roms_routine+1
jsr memmap_allram
pa: lda ($00),y
@@ -40,7 +40,7 @@ pa: lda ($00),y
poke_under_roms_routine:
php
; Offset of arg of lda ($00),y
// Offset of arg of lda ($00),y
stx poke_under_roms+pb-poke_under_roms_routine+1
jsr memmap_allram
pb: sta ($00),y
@@ -64,12 +64,12 @@ memmap_allram_routine:
rts
shift_mem_up_routine:
;; Move memmove_size bytes from memmove_src to memmove_dst,
;; where memmove_dst > memmove_src
;; This means we have to copy from the back end down.
;; This routine assumes the pointers are already pointed
;; to the end of the areas, and that Y is correctly initialised
;; to allow the copy to begin.
// Move memmove_size bytes from memmove_src to memmove_dst,
// where memmove_dst > memmove_src
// This means we have to copy from the back end down.
// This routine assumes the pointers are already pointed
// to the end of the areas, and that Y is correctly initialised
// to allow the copy to begin.
php
jsr memmap_allram
smu1:
@@ -85,12 +85,12 @@ smu1:
jmp memmap_normal
shift_mem_down_routine:
;; Move memmove_size bytes from memmove_src to memmove_dst,
;; where memmove_dst > memmove_src
;; This means we have to copy from the back end down.
;; This routine assumes the pointers are already pointed
;; to the end of the areas, and that Y is correctly initialised
;; to allow the copy to begin.
// Move memmove_size bytes from memmove_src to memmove_dst,
// where memmove_dst > memmove_src
// This means we have to copy from the back end down.
// This routine assumes the pointers are already pointed
// to the end of the areas, and that Y is correctly initialised
// to allow the copy to begin.
php
jsr memmap_allram
smd1:
@@ -105,7 +105,4 @@ smd1:
plp
jmp memmap_normal
ram_routines_end:
.alias ram_routines_len ram_routines_end-ram_routines_start