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Copy pathmemory.asm
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memory.asm
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;*
;* MEMORY.ASM - Memory Manipulation Code
;* by GABY. Inspired by Carsten Sorensen & others.
;*
;* V1.0 - Original release
;*
;If all of these are already defined, don't do it again.
IF !DEF(MEMORY1_ASM)
MEMORY1_ASM SET 1
rev_Check_memory1_asm: MACRO
;NOTE: REVISION NUMBER CHANGES MUST BE ADDED
;TO SECOND PARAMETER IN FOLLOWING LINE.
IF \1 > 1.0 ; <---- NOTE!!! PUT FILE REVISION NUMBER HERE
WARN "Version \1 or later of 'memory.asm' is required."
ENDC
ENDM
INCLUDE "gbhw.inc"
; Macro that pauses until VRAM available.
lcd_WaitVRAM: MACRO
ld a,[rSTAT] ; <---+
and STATF_BUSY ; |
jr nz,@-4 ; ----+
ENDM
PUSHS ; Push the current section onto assember stack.
SECTION "Memory1 Code",ROMX, BANK[10]
;***************************************************************************
;*
;* mem_Set - "Set" a memory region
;*
;* input:
;* a - value
;* hl - pMem
;* bc - bytecount
;*
;***************************************************************************
mem_Set::
inc b
inc c
jr .skip
.loop ld [hl+],a
.skip dec c
jr nz,.loop
dec b
jr nz,.loop
ret
;***************************************************************************
;*
;* mem_Copy - "Copy" a memory region
;*
;* input:
;* hl - pSource
;* de - pDest
;* bc - bytecount
;*
;***************************************************************************
mem_Copy::
inc b
inc c
jr .skip
.loop ld a,[hl+]
ld [de],a
inc de
.skip dec c
jr nz,.loop
dec b
jr nz,.loop
ret
;***************************************************************************
;*
;* mem_Copy - "Copy" a monochrome font from ROM to RAM
;*
;* input:
;* hl - pSource
;* de - pDest
;* bc - bytecount of Source
;*
;***************************************************************************
mem_CopyMono::
inc b
inc c
jr .skip
.loop ld a,[hl+]
ld [de],a
inc de
ld [de],a
inc de
.skip dec c
jr nz,.loop
dec b
jr nz,.loop
ret
;***************************************************************************
;*
;* mem_SetVRAM - "Set" a memory region in VRAM
;*
;* input:
;* a - value
;* hl - pMem
;* bc - bytecount
;*
;***************************************************************************
mem_SetVRAM::
inc b
inc c
jr .skip
.loop push af
di
lcd_WaitVRAM
pop af
ld [hl+],a
ei
.skip dec c
jr nz,.loop
dec b
jr nz,.loop
ret
;***************************************************************************
;*
;* mem_CopyVRAM - "Copy" a memory region to or from VRAM
;*
;* input:
;* hl - pSource
;* de - pDest
;* bc - bytecount
;*
;***************************************************************************
mem_CopyVRAM::
inc b
inc c
jr .skip
.loop di
lcd_WaitVRAM
ld a,[hl+]
ld [de],a
ei
inc de
.skip dec c
jr nz,.loop
dec b
jr nz,.loop
ret
POPS ; Pop the current section off of assember stack.
ENDC ;MEMORY1_ASM