MEMCHK.X86

; MEMORY_CHECK broken ax

ifdef NP2
sub_memchk:		push	es
				push	di
				push	cx
				mov		es, bx
				xor		di, di
				mov		al, cl
				mov		ah, al
				mov		cx, 8000h
memchk1:		stosw
				loop	memchk1
				add		bh, 10h
				mov		es, bx
				mov		cx, 8000h
memchk2:		stosw
				loop	memchk2
				mov		cx, 8000h
memchk3:		scasw
				loopz	memchk3
				jne		memoryerror
				sub		bh, 10h
				mov		es, bx
				mov		cx, 8000h
memchk4:		scasw
				loopz	memchk4
memoryerror:	pop		cx
				pop		di
				pop		es
				ret

endif

ifdef MSDOS
sub_memchk:		mov		ah, 1
				call	WAITVSYNC
				sub		ax, ax
				ret
endif

; --------------------------------------------------------------------------

EXTMEMORYMAX	equ		128						; 128MB MAX

res_memory128ok	db	"MEMORY 128"
res_memoryok	db	"KB OK", 0
res_plusspace	db	"+", 0

res_ramchk		db	"RAM check    :   128KB Ok", 0
res_extchk		db	"Extended RAM :   128KB Ok", 0


extmemory_chk:	push	ax
				mov		bx, 2000h
				mov		cl, 0
				call	bp
				pop		ax
				add		ax, 128
				adc		dx, 0
				push	bp
				mov		bp, sp
				push	ax
				push	dx
				call	STRING_L2A
				mov		cl, 0e1h
				mov		dx, [bp+6+2]					; location
				mov		si, offset res_plusspace
				call	TEXTOUT_CS
				mov		si, [bp+2+2]					; offset
				call	TEXTOUT_DS
				mov		si, offset res_memoryok
				call	TEXTOUT_CS
				pop		dx
				pop		ax
				dec		word ptr [bp+4+2]				; count
				pop		bp
				jne		extmemory_chk
				ret		4


MEMORY_TEST:	mov		bp, offset sub_memchk

				; メインメモリ ～128KB
				mov		bx, 2000h
				mov		cl, 0
				call	bp
				mov		cl, 0e1h
				mov		si, offset res_memory128ok
				call	TEXTOUT_CS

				; メインメモリ 128KB～640KB
				mov		ch, es:[MEM_MSW3]
				and		ch, 7
				je		short mainmemtest_ed
				cmp		ch, 4
				jbe		short mainmemtest_st
				mov		ch, 4
mainmemtest_st:	mov		cl, -1
mainmemtest_l1:	call	bp
				jne		short mainmemtest_ed
				inc		cl
				je		mainmemtest_l1
				add		bh, 20h
				push	cx
				push	dx
				mov		ax, bx
				mov		cl, 6
				shr		ax, cl
				call	STRING_I2A
				pop		dx
				pop		cx
				mov		dl, 7
				mov		cl, 0e1h
				call	TEXTOUT_DS
				dec		ch
				jne		mainmemtest_st
mainmemtest_ed:
				mov		dl, 13
				push	dx
				in		al, 42h
				test	al, 2
				jne		short extmemtest_end	; lowモードは拡張メモリ無し
				xor		bx, bx
				push	ds
				mov		ds, bx
				or		bl, ds:[MEM_EXPMMSZ]
				pop		ds
				je		short extmemtest_end

				mov		ah, 12
				call	WAITVSYNC

				xor		ax, ax
				mov		dx, ax
				push	bx
				mov		cx, I2ABUFFER + 5
				push	cx
				call	extmemory_chk

				push	ds
				xor		bx, bx
				mov		ds, bx
				or		bx, ds:[MEM_EXTMSZ]
				pop		ds
				je		short extmemtest_end
				cmp		bx, (EXTMEMORYMAX - 16)
				jc		short extmomey_o16
				mov		bx, (EXTMEMORYMAX - 16)
extmomey_o16:
				push	ax
				mov		ah, 6
				call	WAITVSYNC
				pop		ax
				mov		cl, 3
				shl		bx, cl
				push	bx
				mov		cx, I2ABUFFER + 3
				push	cx
				call	extmemory_chk

extmemtest_end:	pop		dx
				ret


; ---- epson

epson_memtest:	mov		bx, 2000h				; メインメモリ ～128KB
				mov		cl, 0
				call	sub_memchk
				mov		cl, 0e1h
				mov		si, offset res_ramchk
				call	TEXTOUT_CS

				mov		ch, es:[MEM_MSW3]		; メインメモリ 128KB～640KB
				and		ch, 7
				je		short epmt_ext
				cmp		ch, 4
				jbe		short epmt_main_lp
				mov		ch, 4
epmt_main_lp:	mov		cl, 0
				call	sub_memchk
				add		bh, 20h
				push	cx
				push	dx
				mov		ax, bx
				mov		cl, 6
				shr		ax, cl
				call	STRING_I2A
				pop		dx
				pop		cx
				mov		dl, 17
				mov		cl, 0e1h
				call	TEXTOUT_DS
				dec		ch
				jne		epmt_main_lp

epmt_ext:		in		al, 42h					; 拡張メモリ
				test	al, 2
				jne		short epmt_exit
				xor		ax, ax
				push	ds
				mov		ds, ax
				or		al, ds:[MEM_EXPMMSZ]
				pop		ds
				je		short epmt_exit
				inc		dh
				mov		dl, 0
				push	ax
				mov		bx, 2000h
				mov		cl, 0
				call	sub_memchk
				mov		cl, 0e1h
				mov		si, offset res_extchk
				call	TEXTOUT_CS
				pop		ax
epmt_ext_lp:	inc		ah
				push	ax
				mov		bx, 2000h
				mov		cl, 0
				call	sub_memchk
				pop		ax
				push	ax
				push	dx
				mov		al, 0
				shr		ax, 1
				call	STRING_I2A
				pop		dx
				mov		cl, 0e1h
				mov		dl, 15
				mov		si, I2ABUFFER + 5
				call	TEXTOUT_DS
				pop		ax
				cmp		ah, al
				jb		epmt_ext_lp
epmt_exit:		inc		dh
				mov		dl, 0
				ret