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EMA32.ASM
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;ema32.asm
; Expanded Memory Array
INCLUDE UBDEF.H
INCLUDE UB.H
shl_dxax_cl macro
db 0fh,0a5h,0c2h ;=shld dx,ax,cl
shl ax,cl
endm
shl_edxeax_cl macro
set32
db 0fh,0a5h,0c2h ;=shld dx,ax,cl
set32
shl ax,cl
endm
makemaptbl macro reg1,reg2
mov [reg1],reg2
inc reg2
mov [reg1+4],reg2
inc reg2
mov [reg1+8],reg2
inc reg2
mov [reg1+12],reg2
sub reg2,3
endm
get_dxax macro
local jp
backsp_mac
xor dx,dx
lodsw
or ax,ax
jz jp
cmp ax,2
lodsw
jb jp
mov dx,[si]
je jp
jmp ilgerr
jp:
endm
_emabaseadr equ 0
_emabasehigh equ 2
_ema1stlim equ 4
_ema2ndlim equ 8
_emaattribsize equ 16 ;>= _ema2ndlim + 4
_emaattribsizeword equ 8 ;_emaattribsize/2
_emaattribsizelog equ 4 ;log_2 of _emaattribsize
EMSpagesize equ 4000h
EMSmaxhigh equ 128*16 ;128*16*64K=128M
CODE SEGMENT PUBLIC
ASSUME CS:CODE,DS:DATA
public getemaadr,emaword,letema,inpema,dimema,useema
public swapema,emain,ema_close
public clrema,negema,incema,decema
extrn mainlp:near,hotst:near
extrn clr_next:near,neg_next:near
extrn inc_next:near,dec_next:near
extrn negallsi:near,lvincin:near,lvdecin:near
extrn blockout:near
extrn let_extended:near
extrn ready:near,print2:near,ahedsp:near
extrn FORMUL:near,KAKKO:near
extrn addin:near,subin:near,mulin:near,divin:near
extrn resin:near,idivin:near,ratdivin:near
extrn farFORMUL:far
extrn farGET_AX:far,farGET_EAX:far
extrn farPRNTBX:far,farBINASC:far
extrn UNDEFERR:near,OVRERR:near,DBLDEF:near,emaerr:near
extrn cantdo:near,synerr:near,sperr:near
extrn ilgerr:near,diskerr:near,nofile:near,existerr:near
extrn nolerr:near,indexerr:near,blockerr:near
extrn undeferr:near,nofile:near
;
; * return EMS handle
;
ema_close:
mov dx,[emahandle]
or dx,dx
jz emacloseret
mov ah,45h
int 67h
mov [emahandle],0
emacloseret:
ret
;
; * get ema adr
; out: ecx = file pointer
getemacantdo:
jmp undeferr
getemadirect:
mov ax,[bp+1]
add bp,3
jmps getema5
getemaadr:
cmp [emahandle],0
je getemacantdo
mov al,[bp]
mov ah,[bp+3]
cmp ax,0c1f1h ;1 word number + ; ?
je getemadirect
call formul ;get ema number
cmp byte ptr [bp],0c1h ;code of ;
je getema2
xor ax,ax ;ema number is not specified
push ax ;* attribute base adr
jmp getema7
getema2:
backsp_mac
mov ax,[si]
cmp ax,1
jb getema5
jne getemailg
mov ax,[si+2]
getema5:
cmp ax,16
jae getemailg
my_shl ax,_emaattribsizelog
push ax ;* attribute base adr
inc bp
call formul
getema7:
get_dxax
mov cl,[bp]
cmp cl,0c2h ;code of ,
je getema20 ;2 dim case
; 1 dim case
cmp cl,')'
jne getemasynerr
inc bp
if FLG98
mov cx,emaattributeseg
else
mov cx,ss
add cx,emaattributeseg
endif
mov es,cx
set32
shl dx,16
mov dx,ax
pop di ;* attrib offset
cmp word ptr es:[di+_emabasehigh],-1
je getemaundef
set32
cmp dx,es:[di+_ema1stlim]
ja getemailg
set32
mov ax,es:[di+_ema2ndlim]
set32
or ax,ax
jnz getemailg
mov cl,[emaunitlog]
set32
shl dx,cl
set32
add dx,es:[di+_emabaseadr]
set32
mov cx,dx
smov es,ss
ret
getemailg:
jmp ilgerr
getemasynerr:
jmp synerr
getemaundef:
jmp undeferr
getema20: ;2 dim case
push dx ;** 1st argument
push ax ;
inc bp
call kakko
get_dxax
push dx ;*** 2nd argument
push ax ;
getema50:
if FLG98
mov ax,emaattributeseg
else
mov ax,ss
add ax,emaattributeseg
endif
mov es,ax
set32
pop bx ;*** 2nd arg
set32
pop ax ;** 1st arg
pop di ;* attrib offset
cmp word ptr es:[di+_emabasehigh],-1
je getemaundef
set32
cmp ax,es:[di+_ema1stlim]
ja getemailg
set32
mov cx,es:[di+_ema2ndlim]
set32
cmp bx,cx
ja getemailg
set32
inc cx
set32
mul cx
set32
add ax,bx ;now eax = local element number
mov cl,[emaunitlog]
set32
shl ax,cl
set32
add ax,es:[di+_emabaseadr]
set32
mov cx,ax
smov es,ss
ret
;
; map logical pages to physical pages
; in :ecx file pointer
emsmaperror:
call ema_close
jmp emaerr
mappage_ax:
push ax
push cx
push dx
push si
; make allocation map
mov si,offset maptable
mov cx,ax
makemaptbl si,cx
; do mapping
mov ax,5000h
mov dx,[emahandle]
mov cx,4 ;64K/pagesize
mov si,offset maptable
int 67h
or ah,ah
jnz emsmaperror
pop si
pop dx
pop cx
pop ax
ret
;farmappage:
; call mappage
; retf
;
;* expanded MEMORY ARRAY used as function
;
EMA1ilg:
jmp ilgerr
EMAIN:
call getemaadr ;ecx = offset
; jmp getfromema ;call & ret
;
; * copy from ema to calc stack
; in : ecx file pointer
; result : [calcsp] and its value
; destroy : cx,di,si
getfromema:
set32
mov ax,cx
set32
shr ax,14
and al,0fch ;cut lowest 2 bits
cmp ax,[maptable] ;mapped top page
je getfromema10 ;already mapped
call mappage_ax
getfromema10:
call ahedsp
mov di,si ;dest
push ds ;*
mov ds,[EMSbaseseg] ;EMS seg
mov si,cx ;EMS adr
mov cx,[si]
and cx,lenmask
inc cx
rep movsw
pop ds ;*
ret
;
; * copy to ema from calc stack
; in :ecx file pointer
; [calcsp] and its value
; [calcsp] will be updated
; destroy : ax,bx,cx,dx,si
puttoema:
set32
mov ax,cx
set32
shr ax,14
and al,0fch ;cut lowest 2 bits
cmp ax,[maptable] ;mapped top page
je puttoema10 ;already mapped
call mappage_ax
puttoema10:
mov si,[calcsp] ;source
push es ;*
mov es,[EMSbaseseg] ;EMS seg
mov di,cx ;EMS adr
mov cx,[si]
and cx,lenmask
cmp cx,[emawords]
ja emaover
inc cx
rep movsw
pop es ;*
ret
farputtoema:
call puttoema
retf
emaover:
jmp ovrerr
;
; * access to expanded ram
;
letema:
inc bp
call getemaadr ;ecx = offset
set32
push cx
;calc value to assign
cmp byte ptr [bp],codeofequal
JNE letema_expanded
INC BP
CALL FORMUL
letema_30:
;store value
set32
pop cx
call puttoema
add [calcsp],unitbyte
jmp mainlp
emasynerr:
jmp synerr
letema_expanded:
call getfromema
call let_extended
jmp letema_30
;
;* input to ema
;
inpemaover:
jmp ovrerr
inpema:
winc bp
call getemaadr ;ecx = offset
call puttoema
add [calcsp],unitbyte
ret
;
;* dim ema
;
dimdblerr:
jmp dbldef
dimema:
push es
call far ptr farinitema
winc bp
call formul
cmp byte ptr [bp],0c1h ;code of ;
je dimema5
xor ax,ax ;ema number is not specified
push ax ;* attribute base
jmp dimema15
dimema5:
backsp_mac
lodsw
cmp ax,1
jb dimema10 ;if 0
jne dimemailg
mov ax,[si]
cmp ax,16
jae dimemailg ;must <= 15
dimema10:
my_shl ax,_emaattribsizelog
push ax ;* attribute base
mov di,ax
cmp byte ptr [bp],0c1h ;code of ;
jne dimemailg
inc bp
call formul
dimema15:
get_dxax
push dx ;** 1st limit
push ax ;
cmp byte ptr [bp],0c2h ;code of ,
jne dimema40
inc bp
call formul
get_dxax
push dx ;*** 2nd limit
push ax ;
jmp dimema50
dimema40:
set32
xor ax,ax
set32
push ax ;*** 2nd limit(for 1 dim case)
dimema50:
cmp byte ptr [bp],')'
jne dimemailg
inc bp
;set ema attributes
if FLG98
mov ax,emaattributeseg
else
mov ax,ss
add ax,emaattributeseg
endif
mov es,ax
set32
pop ax ;***
set32
pop bx ;**
pop di ;*
cmp word ptr es:[di+_emabasehigh],-1
je dimema55
jmp dimdblerr ;duplicate definition
dimema55:
set32
mov es:[di+_ema2ndlim],ax ;2nd limit
set32
inc ax
jz dimemailg
set32
mov es:[di+_ema1stlim],bx ;1st limit
set32
inc bx
jz dimemailg
set32
mul bx ;edx:eax = # of elements
set32
or dx,dx
jnz dimemaover
set32
push ax ;*
mov cl,[emaunitlog]
shl_edxeax_cl
set32
or dx,dx
jnz dimemaover
set32
mov bx,[emanow] ;ebx = limit+1
set32
add ax,bx
dimema60:
set32
mov es:[di+_emabaseadr],bx ;start adr
set32
mov [emanow],ax ;next start adr
set32
push bx ;* start adr
;check EMS free space
set32
mov dx,ax
set32
shr dx,16
cmp dx,EMSmaxhigh
jae dimemaover
mov cx,EMSpagesize
div cx
or dx,dx
jz chkEMS10
inc ax
chkEMS10:
add ax,3 ;pages-1
and ax,0fffch ;cut lowest 3bits
mov bx,ax ;total page number
mov ah,51h ;reallocation
mov dx,[emahandle]
int 67h
or ah,ah
jnz dimemaover
; make allocation map
xor bx,bx ;map 0 page
mov si,offset maptable
makemaptbl si,bx
; do mapping
mov ax,5000h
mov dx,[emahandle]
mov cx,4
mov si,offset maptable
int 67h
or ah,ah
jnz emsmaperror
; set all elements to 0
pop di ;si:di = start ptr
pop si ;
set32
pop dx ;edx = # of elements
mov es,[EMSbaseseg]
dimema90:
set32
push dx
mov ax,si
my_shl ax,2
cmp ax,[maptable] ;mapped top page
je dimema95 ;already mapped
push si
push di
; make allocation map
mov bx,offset maptable
my_shl si,2 ;*4
makemaptbl bx,si
; do mapping
mov ax,5000h
mov dx,[emahandle]
mov cx,4
mov si,offset maptable
int 67h
or ah,ah
jnz emsmaperror
pop di
pop si
dimema95:
mov word ptr es:[di],0 ;set 0
add di,[emaunitbytes]
adc si,0
set32
pop dx
set32
dec dx
jnz dimema90
pop es
ret
dimemaover:
jmp emaerr
dimemailg:
jmp ilgerr
;
; * use expanded ram
;
useema:
call far ptr farinitema
jmp mainlp
;
; * check expanded ram
;
EMAword:
jmp far ptr farEMAword
;
; * swap ema
;
swapema:
call getemaadr ;ecx = offset
set32
push cx ;* offset1
call getfromema
cmp byte ptr [bp],0c2h ;code of ,
jne swapemasynerr
INC BP
cmp word ptr [bp],0f580h ;code of ema(
jne swapemasynerr
add bp,2
call getemaadr ;ecx = offset
set32
pop ax
set32
push cx ;* offset2
set32
push ax ;** offset1
call getfromema
set32
pop cx ;** offset1
call puttoema
add [calcsp],unitbyte
set32
pop cx ;* offset2
call puttoema
add [calcsp],unitbyte
jmp mainlp
swapemasynerr:
jmp synerr
farSwapemasub:
mov ax,code2
mov es,ax
set32
mov ax,es:[emablocknowB]
set32
push ax ;*p2
set32
mov cx,es:[emablocknow]
set32
push cx ;**p1
mov ax,ss
mov es,ax
call getfromema ;get valA from var1
set32
pop ax ;**p1
set32
pop cx ;*p2
set32
push cx ;*p2
set32
push ax ;**p1
call getfromema ;get valB from var2
set32
pop cx ;**p1
call puttoema ;write valB to var1
add [calcsp],unitbyte
set32
pop cx ;*p2
call puttoema ;write valA to var2
add [calcsp],unitbyte
retf
;
;* copy ema to ema by block
;
copyemasub:
mov ax,code2
mov es,ax
set32
mov ax,es:[emablocknowB]
set32
push ax
set32
mov cx,es:[emablocknow]
mov ax,ss
mov es,ax
call getfromema
set32
pop cx
call puttoema
add [calcsp],unitbyte
retf
;
;* add ema (block+=const)
;
addemablkconstsub:
mov ax,code2
mov es,ax
set32
mov cx,es:[emablocknow]
set32
push cx
mov ax,ss
mov es,ax
call getfromema
call ahedsp
mov di,si
add si,2*unitbyte
copy_si2di
call word ptr [blockoperation]
set32
pop cx
call puttoema
add [calcsp],unitbyte
retf
;
; * add ema (block+=block)
;
addemablkblksub:
mov ax,code2
mov es,ax
set32
mov cx,es:[emablocknowB]
set32
push cx ;*
set32
mov ax,es:[emablocknow]
set32
push ax ;**
mov ax,ss
mov es,ax
call getfromema
set32
pop cx ;**
call getfromema
call word ptr [blockoperation]
set32
pop cx ;*
call puttoema
add [calcsp],unitbyte
retf
;
; * negate ema
;
negema:
call getemaadr ;ecx = offset
call negemasub
jmp neg_next
negemasub:
set32
push cx
call getfromema
mov si,[calcsp]
call negallsi
set32
pop cx
call puttoema
add [calcsp],unitbyte
ret
farnegemasub:
call negemasub
retf
;
; * increment ema
;
incema:
call getemaadr ;ecx = offset
set32
push cx ;offset
call getfromema
mov di,[calcsp]
mov ax,[emawords]
mov [limitlen],ax
call lvincin
set32
pop cx ;offset
call puttoema
add [calcsp],unitbyte
jmp inc_next
;
; * decrement ema
;
decema:
call getemaadr ;ecx = offset
set32
push cx ;offset
call getfromema
mov di,[calcsp]
mov ax,[emawords]
mov [limitlen],ax
call lvdecin
set32
pop cx ;offset
call puttoema
add [calcsp],unitbyte
jmp dec_next
;
; * clear ema
;
clrema:
call getemaadr ;ecx = offset
call clremasub
jmp clr_next
clremasub:
set32
mov ax,cx
set32
shr ax,14
and al,0fch ;cut lowest 2 bits
cmp ax,[maptable] ;mapped top page
je clrema10 ;already mapped
call mappage_ax
clrema10:
push ds
mov ds,[EMSbaseseg]
mov si,cx
mov word ptr [si],0
pop ds
ret
farclremasub:
call clremasub
retf
code ends
DATA SEGMENT PUBLIC
public emahandle,emanow,emawords
extrn fnamebuf:byte
extrn calcsp:word
extrn maxword:word,limitlen:word
extrn blocksw:byte,blockoperation:word
extrn calcsp_limit:word
EMSbaseseg dw 0
emahandle dw 0
emanow dw 0,0
emaunitlog db 0,0
emaunitbytes dw 0,0
emawords dw 0
maptable dw 0,0,0,1,0,2,0,3
data ends
code2 segment public
assume cs:code2,ds:data
public swapemablk,clremablk,negemablk,emablkin
public faremaword
public fardeleteema,emausing
extrn ahedsp2:near
extrn msg2:near,msg_cs2:near,get_char2:near,letnl2:near
extrn farBEEPSUB:far
extrn ex3ilgerr:near
;
; * jumped from freeze
;
emausing:
mov dx,offset emausingmsg
call msg_cs2
jmp far ptr ready
if JAPANESE
emausingmsg db 'ＥＭＡ配列使用中はfreezeできません',0
else
emausingmsg db 'cannot freeze including ema-arrays',0
endif
;
; * use expanded ram
;
farinitema:
call initema
retf
initema:
mov bx,[emahandle]
or bx,bx
jnz initemaret ;already got handle
call getemahandle
useemain:
set32
xor ax,ax
set32
mov [emanow],ax
if FLG98
mov ax,emaattributeseg
else
mov ax,ss
add ax,emaattributeseg
endif
mov es,ax
xor di,di
mov cx,_emaattribsizeword*16 ;16emas
mov ax,-1
rep stosw
smov es,ss
mov ax,[maxword]
inc ax ;+ attribute
add ax,ax
call goodEMSunitlog
mov [emaunitlog],cl
mov [emaunitbytes],ax
shr ax,1
dec ax
mov [emawords],ax
initemaret: