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mem.bas
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static shared As Integer mem_a20_alt=0
static shared As Integer mem_a20_key=0
static Shared As Integer mem_a20_state = 0
'static shared as Integer readlnum=0,writelnum=0
static shared As Integer nopageerrors
static shared As Integer cache=4 ' en la rutina "mem_updatecache" 4=256k, el maximo para un 486 dx266
static shared As Integer memwaitstate
static shared As ULong biosmask=&hFFFF ' BIOS de 64k
static shared As Integer cachesize=256
'static shared as UByte romext(32768)
static shared As ULong mmucache(0 To &hFFFFF)
static shared As Integer mmucaches(0 To 53)
static shared As Integer mmunext=0
static shared As Integer mmuflush=0
static shared As Integer pctrans=0
static Shared as ULong mem_logical_addr
Declare Sub addwritelookup(virt As ULong , phys As ULong )
Declare Sub addreadlookup (virt As ULong , phys As ULong )
sub loadbinary(memaddr as ULong, filename as String, mem As UByte Ptr)
if Dir(filename) = "" then print "No existe:";filename:Sleep:end
Dim handle As ULong= FreeFile
Dim tmpdata As String=""
Dim n As ULong
open filename for binary as #handle
tmpdata = Space(lof(handle))
get #handle, , tmpdata
for n = 1 to len(tmpdata)
mem[memaddr + n - 1] = asc(Mid(tmpdata, n, 1))
next n
close handle
end Sub
''''''''''''
Function leeram1(ByVal addr As ULong) As UByte
' no se si esto es bueno, pero evito que se salga de la RAM total
'addr=addr And rammask
If addr > RAM_TOTAL Then Return &hff
If addr>=&h000000 And addr<=&h09FFFF Then Return ram[addr] ' 640K RAM
'
If addr>=&h0A0000 And addr<=&h0AFFFF Then Return svga_read(addr)' 64K VRAM VGA
If addr>=&h0B0000 And addr<=&h0B7FFF Then Return svga_read(addr)' 32K VRAM MDA
If addr>=&h0B8000 And addr<=&h0BFFFF Then Return svga_read(addr)' 32K VRAM CGA
'
If addr>=&h0C0000 And addr<=&H0C7FFF Then Return vrom[addr And &h7fff] ' 32K VROM VIDEO
If addr>=&h0C8000 And addr<=&H0CFFFF Then Return &hff 'vrom[addr And &h7fff] ' 32K VROM VIDEO EXPANSION ( POR EJEMPLO, VIDEO ROM 64K)
If addr>=&h0D0000 And addr<=&H0DFFFF Then Return ram[addr] ' 64k RAM zona alta --NO SE USAN??????
If addr>=&h0E0000 And addr<=&H0EFFFF Then Return rom[addr And biosmask] ' 64K ROM BIOS EXPANSION
If addr>=&h0F0000 And addr<=&H0FFFFF Then
If shadowbios=0 Then Return rom[addr And biosmask]
Return ram[addr]
EndIf
If addr>=&h100000 And addr<=RAM_TOTAL Then Return ram[addr] ' RAM EXTENDIDA, DESDE 1mb
' no deberia llegar aqui, si lo hace, algo va mal
Print #5,"RAM leer fuera rango:";Hex(addr,8)
Return &hff
End Function
Function leeram2(ByVal addr As ULong) As UShort
'If addr>=&h0A0000 And addr<=&h0AFFFF Then Return svga_readw(addr) ' 64K VRAM VGA
'If addr>=&h0B0000 And addr<=&h0B7FFF Then Return svga_readw(addr) ' 32K VRAM MDA
'If addr>=&h0B8000 And addr<=&h0BFFFF Then Return svga_readw(addr) ' 32K VRAM CGA
If addr>=&h0F0000 And addr<=&H0FFFFF Then
If shadowbios=0 Then Return rom[addr And biosmask] Or (rom[(addr And biosmask)+1] Shl 8)
Return ram[addr] Or (ram[addr+1] Shl 8)
EndIf
Return leeram1(addr) Or (leeram1(addr+1) Shl 8)
End Function
Function leeram4(ByVal addr As ULong) As ULong
'If addr>=&h0A0000 And addr<=&h0AFFFF Then Return svga_readl(addr) ' 64K VRAM VGA
'If addr>=&h0B0000 And addr<=&h0B7FFF Then Return svga_readl(addr) ' 32K VRAM MDA
'If addr>=&h0B8000 And addr<=&h0BFFFF Then Return svga_readl(addr) ' 32K VRAM CGA
If addr>=&h0F0000 And addr<=&H0FFFFF Then
If shadowbios=0 Then Return rom[addr And biosmask] Or (rom[(addr And biosmask)+1] Shl 8) Or (rom[(addr And biosmask)+2] Shl 16) Or (rom[(addr And biosmask)+3] Shl 24)
Return ram[addr] Or (ram[addr+1] Shl 8) Or (ram[addr+2] Shl 16) Or (ram[addr+3] Shl 24)
EndIf
Return leeram1(addr) Or (leeram1(addr+1) Shl 8) Or (leeram1(addr+2) Shl 16) Or (leeram1(addr+3) Shl 24)
End Function
''''''''''''''
sub grabaram1(ByVal addr As ULong, ByVal valor As ubyte)
' no se si esto es bueno, pero evito que se salga de la RAM total
'addr=addr And rammask
If addr > RAM_TOTAL Then Return
If addr>=&h000000 And addr<=&h09FFFF Then ram[addr]=valor: Return ' 640k ram
'
If addr>=&h0A0000 And addr<=&h0AFFFF Then svga_write(addr,valor):Return ' 64k vram vga
If addr>=&h0B0000 And addr<=&h0B7FFF Then svga_write(addr,valor):Return ' 32k VRAM MDA, CGA, EGA
If addr>=&h0B8000 And addr<=&h0BFFFF Then svga_write(addr,valor):Return ' 32k vram cga
'
If addr>=&h0C0000 And addr<=&H0C7FFF Then Return ' 32k vrom video
If addr>=&h0C8000 And addr<=&H0CFFFF Then Return ' 32k vrom video
If addr>=&h0D0000 And addr<=&H0DFFFF Then ram[addr]=valor: Return ' 64k ram alta --NO SE USAN??????
If addr>=&h0E0000 And addr<=&H0EFFFF Then Return ' 64k rom expansion
If addr>=&h0F0000 And addr<=&H0FFFFF Then
If modo_bios=0 Or modo_bios=1 Then return
If shadowbios_write Then
ram[addr]=valor ' 64K ROM BIOS (las rom empiezan de FFFFF hacia abajo) FFFF0 vector de salto
EndIf
return
EndIf
' expansion de RAM
If addr>=&h100000 And addr<=RAM_TOTAL Then ram[addr]=valor: Return
' no deberia llegar aqui, si lo hace, algo va mal
Print #5,"RAM grabar fuera rango:";Hex(addr,8),Hex(valor,2)
End Sub
sub grabaram2(ByVal addr As ULong, ByVal valor As UShort)
'If addr>=&h0A0000 And addr<=&h0AFFFF Then svga_writew(addr,valor):Return
'If addr>=&h0B0000 And addr<=&h0B7FFF Then svga_writew(addr,valor):Return
'If addr>=&h0B8000 And addr<=&h0BFFFF Then svga_writew(addr,valor):Return
If addr>=&h0F0000 And addr<=&H0FFFFF Then
If modo_bios=0 Or modo_bios=1 Then Return
If shadowbios_write Then
ram[addr]=valor And &hff
ram[addr+1]=(valor Shr 8) And &hff
EndIf
return
EndIf
grabaram1(addr,valor And &hff)
grabaram1(addr+1,(valor Shr 8) And &hff)
End Sub
sub grabaram4(ByVal addr As ULong, ByVal valor As ULong)
'If addr>=&h0A0000 And addr<=&h0AFFFF Then svga_writel(addr,valor):Return
'If addr>=&h0B0000 And addr<=&h0B7FFF Then svga_writel(addr,valor):Return
'If addr>=&h0B8000 And addr<=&h0BFFFF Then svga_writel(addr,valor):Return
If addr>=&h0F0000 And addr<=&H0FFFFF Then
If modo_bios=0 Or modo_bios=1 Then return
If shadowbios_write Then
ram[addr]=valor And &hff
ram[addr+1]=(valor Shr 8) And &hff
ram[addr+2]=(valor Shr 16) And &hff
ram[addr+3]=(valor Shr 24) And &hff
EndIf
return
EndIf
grabaram1(addr,valor And &hff)
grabaram1(addr+1,(valor Shr 8) And &hff)
grabaram1(addr+2,(valor Shr 16) And &hff)
grabaram1(addr+3,(valor Shr 24) And &hff)
End Sub
'''''''''''''
Sub initmmucache()
Dim As Integer c =Any
for c=0 To &hFFFFF
mmucache(c)=&hFFFFFFFF
Next
for c=0 To 63
mmucaches(c)=&hFFFFFFFF
Next
mmunext=0
End Sub
Sub resetreadlookup()
Dim As Integer c
For c=1 To 1024*1024 '*4 'Step 4 '?? creo que no, por que "readlookup2 ya es de 4 bytes)
readlookup2[c-1]=&hFFFFFFFF
Next
for c=0 To 255
readlookup(c)=&hFFFFFFFF
Next
readlnext=0
For c=1 To 1024*1024 '*4 'Step 4'?? creo que no, por que "writelookup2 ya es de 4 bytes)
writelookup2[c-1]=&hFFFFFFFF
Next
for c=0 To 255
writelookup(c)=&hFFFFFFFF
Next
writelnext=0
pccache=&hFFFFFFFF
' este lo pongo yo
'For c=1 To 1024*1024
' cachelookup2[c-1]=&hFF
'Next
End Sub
Sub flushmmucache()
'''''''''''''''''''''''''
Return ' anulado por ahora
''''''''''''''''''''''''
Dim As integer c =Any
for c=0 To 255
if (readlookup(c)<>&hFFFFFFFF) Then
readlookup2[readlookup(c)]=&hFFFFFFFF
readlookup(c)=&hFFFFFFFF
EndIf
if (writelookup(c)<>&hFFFFFFFF) Then
writelookup2[writelookup(c)]=&hFFFFFFFF
writelookup(c)=&hFFFFFFFF
EndIf
Next
mmuflush+=1
pccache=&hFFFFFFFF
c=&hFFFFFFFF ' es mejor asi??? (para que el puntero PCCACHE2 no apunte al infinito)
pccache2=@c'&hFFFFFFFF
for c=0 To 63
if (mmucaches(c)<>&hFFFFFFFF) Then
mmucache(mmucaches(c))=&hFFFFFFFF
mmucaches(c)=&hFFFFFFFF
EndIf
Next
End Sub
Sub flushmmucache_cr3()
'''''''''''''''''''''''''
Return ' anulado por ahora
''''''''''''''''''''''''
Dim As Integer c=Any
for c=0 To 255
if (readlookup(c)<>&hFFFFFFFF) Then
readlookup2[readlookup(c)]=&hFFFFFFFF
readlookup(c)=&hFFFFFFFF
EndIf
if (writelookup(c)<>&hFFFFFFFF) Then
writelookup2[writelookup(c)]=&hFFFFFFFF
writelookup(c)=&hFFFFFFFF
EndIf
Next
for c=0 To 63
if (mmucaches(c)<>&hFFFFFFFF) Then
mmucache(mmucaches(c))=&hFFFFFFFF
mmucaches(c)=&hFFFFFFFF
EndIf
Next
End Sub
Sub mem_updatecache()
flushmmucache()
'if ( 0 =is386) Then ' solo para8086
' cachesize=256
' memwaitstate=0
' return
'EndIf
'if (cpu_16bitbus) Then
' memwaitstate = 512 * cpu_multi
'else
memwaitstate = 384 * cpu_multi
'EndIf
'Print #5,cache
Select Case As Const (cache)
case 0
cachesize=32
case 1
cachesize=64
case 2
cachesize=128
case 3
cachesize=256
case 4
cachesize=256
memwaitstate=0
End Select
end Sub
Function mmutranslatereal(ByVal addr As ULong , ByVal rw As Integer ) As ULong
'Dim As Integer mmuout=0
Dim As ULong addr2 =Any
Dim As ULong temp=any,temp2=any,temp3=Any
If abrt Then Return -1 'Print #5,"FALLO EN MMUTRANSLATEREAL":Return -1
addr2=cr3 + ((addr Shr 20) And &hFFC)
temp=leeram4(addr2) 'Shr 2) ' ----------------
temp2=temp
'For mmuout=-32 To 32 Step 4:Print Hex(leeram4(addr2+mmuout),8):Next
'Print #5,"traslada ";Hex(addr,8),rw,Hex(temp,8),Hex(addr2,8),Hex(cr3)
If (temp And 1)=0 Then
'deb=2:printdebug()
cr2=addr
temp = temp And 1
if (CPL=3) Then temp = temp Or 4
if rw Then temp = temp Or 2
abrt = ABRT_PF
abrt_error = temp
Return -1
EndIf
temp=leeram4(((temp And inv(&hFFF))+((addr Shr 10) And &hFFC))) ' Shr 2) ' --------------
temp3=temp And temp2
'Print #5,"traslada 2: ";Hex(temp,8),Hex(temp3,8)
If ((temp And 1)=0) Or ((CPL=3) And ((temp3 And 4)=0) And (cpl_override=0)) _
Or ( (rw<>0) And ((temp3 And 2)=0) And ((CPL=3) Or (cr0 And WP_FLAG))) Then
cr2=addr
temp = temp And 1
if (CPL=3) Then temp = temp Or 4
if rw Then temp = temp Or 2
abrt = ABRT_PF
abrt_error = temp
Return -1
EndIf
mmu_perm=temp And 4
'Print #5,Hex(addr,8),Hex((temp And inv(&hFFF))+(addr And &hFFF)),Hex(temp),Hex(cs0),Hex(pc),Hex(EDI):sleep
grabaram4(addr2, leeram4(addr2) Or &h20)
temp3=(temp2 And inv(&hFFF)) + ((addr Shr 10) And &hFFC)') shr 2 ' ---------------
grabaram4(temp3, leeram4(temp3) or iif(rw,&h60,&h20))
return (temp And inv(&hFFF))+(addr And &hFFF)
End Function
Sub addreadlookup(ByVal virt As ULong , ByVal phys As ULong )
'If virt<&h100000 Or virt>RAM_TOTAL Then Return
'print #5,"AddReadlookup:";Hex(virt);" ";Hex(phys);" ";Hex(cs0);" ";Hex(ds0);" ";Hex(es0);" ";Hex(ss0);" ";Hex(opcode);" ";Hex(pc)
'''''''''''''''''''''''''
Return ' anulado por ahora
''''''''''''''''''''''''
if readlookup2[virt Shr 12]<>&hFFFFFFFF Then Return
if cachelookup2[phys Shr 12]=0 Then
' readlnum+=1
cycles-=memwaitstate
if cachelookup(cachelnext) <> &hffffffff Then cachelookup2[cachelookup(cachelnext)] = 0
cachelookup(cachelnext) = phys Shr 12
cachelookup2[phys Shr 12] = 1
cachelnext = (cachelnext + 1) And (cachesize - 1)
EndIf
if readlookup(readlnext)<>&hFFFFFFFF Then
readlookup2[readlookup(readlnext)]=&hFFFFFFFF
EndIf
readlookup2[virt Shr 12]=phys And inv(&hFFF)
readlookupp(readlnext)=mmu_perm
readlookup(readlnext)=virt Shr 12: readlnext+=1
readlnext = readlnext And (cachesize-1)
End Sub
Sub addwritelookup(ByVal virt As ULong , ByVal phys As ULong )
'If virt<&h100000 Or virt>RAM_TOTAL Then Return
'print #5,"AddWritelookup:";Hex(virt);" ";Hex(phys);" ";Hex(virt Shr 12);" ";Hex(writelookup2[virt Shr 12])
'''''''''''''''''''''''''
Return ' anulado por ahora
''''''''''''''''''''''''
if writelookup2[virt Shr 12]<>&hFFFFFFFF Then Return
if cachelookup2[phys Shr 12]=0 Then
' writelnum+=1
cycles-=memwaitstate
if (cachelookup(cachelnext) <> &hffffffff) Then cachelookup2[cachelookup(cachelnext)] = 0
cachelookup(cachelnext) = phys Shr 12
cachelookup2[phys Shr 12] = 1
cachelnext = (cachelnext + 1) And (cachesize - 1)
EndIf
cycles-=memwaitstate
if writelookup(writelnext)<>&hFFFFFFFF Then
writelookup2[writelookup(writelnext)]=&hFFFFFFFF
EndIf
writelookup2[virt Shr 12]=phys And inv(&hFFF)
writelookupp(writelnext)=mmu_perm
writelookup(writelnext)=virt Shr 12: writelnext+=1
writelnext = writelnext And (cachesize-1)
End Sub
''''''''''''''''''''''''LEE BYTE'''''''''''''''''''''''''''''
Function readmemb_386l(ByVal seg As Ulong , ByVal addr As Ulong ) As UByte
If (seg=&hFFFFFFFF) Then
'if (deb=3) Then print #5,"SEG:";Hex(seg,8);" ADDR:";Hex(addr,8)
'if (deb=3) Then print #5,"error segment rb FFFFFFFF":sleep
return -1
EndIf
mem_logical_addr = seg + addr
addr = mem_logical_addr
If (readlookup2[mem_logical_addr Shr 12] <> &hFFFFFFFF) Then
return leeram1(readlookup2[mem_logical_addr Shr 12] + (mem_logical_addr And &hFFF))
EndIf
if (cr0 Shr 31) Then
addr = mmutranslatereal(addr, 0)
if (addr = &hFFFFFFFF) Then return &hFF
EndIf
addr = addr And rammask
'If (addr Shr 15)<(RAM_TOTAL Shr 15) Then
addreadlookup(mem_logical_addr, addr)
Return leeram1(addr)
'EndIf
'if (_mem_read_b[addr Shr 15]) Then return _mem_read_b[addr Shr 15](addr)
Return &hFF
End Function
' esta llama a la anterior
Function readmemb_386(byval s As Ulong , byval a As ULong) As UByte
Return iif( (readlookup2[(s+a) Shr 12]=&hFFFFFFFF) or (s=&hFFFFFFFF) , readmemb_386l(s,a), _
leeram1(readlookup2[(s+a) Shr 12] + ((s+a) And &hFFF)) )
End Function
''''''''''''''''''''''''''''''''''''''''''''''''''''''
'''''''''''''''''''''' LEE PALABRA '''''''''''''''''''''''''''''
Function readmemw_386l(ByVal seg As Ulong , ByVal addr As ULong ) As UShort
'Dim As ulong mem_logical_addr '''''''''''''''propia'''''''''''''''''''''''''''''''''''''''''''''
Dim As ULong addr2 = seg + addr
mem_logical_addr = addr2
' esta condicion solo se cumple si ADDR2=&HFFF nada mas.....
if (addr2 And &hFFF)>&hFFE Then
if (cr0 Shr 31) Then
If ( mmutranslatereal(addr2, 0) = &hffffffff ) Then Return 0
If ( mmutranslatereal(addr2+1, 0) = &hffffffff ) Then Return 0
EndIf
'if (is386) Then ' no lo necesito ya, siempre es 386 minimo
return readmemb_386l(seg,addr) Or (readmemb_386l(seg,addr+1) Shl 8)
'else
' Return readmembl(seg+addr) Or (readmembl(seg+addr+1) Shl 8) ' ya no me hace falta, no es 8086
'EndIf
EndIf
if (seg=&hFFFFFFFF) Then
'if (deb=3) Then print #5,"0 segment rw",CS1,cs0,pc,opcode,addr
return -1
EndIf
if (cr0 Shr 31) Then
addr2=mmutranslatereal(addr2,0)
if (addr2=&hFFFFFFFF) Then return &hFFFF
EndIf
addr2 = addr2 And rammask
'If (addr2 Shr 15)<(RAM_TOTAL Shr 15) Then
addreadlookup(mem_logical_addr, addr2)
Return leeram2(addr2)
'EndIf
'if (_mem_read_w[addr2 Shr 15)) Then return _mem_read_w[addr2 Shr 15)(addr2)
'if (_mem_read_b[addr2 Shr 15)) Then return _mem_read_b[addr2 Shr 15)(addr2) Or (_mem_read_b[(addr2 + 1) Shr 15)(addr2 + 1) Shl 8)
Return &hffff
End Function
' esta llama a la anterior
Function readmemw_386(byval s As Ulong , byval a As ULong) As UShort
Return iif( (readlookup2[(s+a) Shr 12]=&hFFFFFFFF) or (s=&hFFFFFFFF) or (((s+a) And &hFFF)>&hFFE) , readmemw_386l(s,a), _
leeram2(readlookup2[(s+a) Shr 12] + ((s+a) And &hFFF)))
End Function
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'''''''''''''''''''''' LEE LONG '''''''''''''''''''''''''''''''''''
Function readmeml_386l(ByVal seg As Ulong , ByVal addr As ULong ) As Ulong
'Dim As ulong mem_logical_addr '''''''''''''''propia'''''''''''''''''''''''''''''''''''''''''''''
Dim As ULong addr2 = seg + addr
mem_logical_addr = addr2
if ((addr2 And &hFFF)>&hFFC) Then
if (cr0 Shr 31) Then
if (mmutranslatereal(addr2, 0) = &hffffffff) Then return 0
if (mmutranslatereal(addr2+3, 0) = &hffffffff) Then return 0
EndIf
return readmemw_386(seg,addr) Or (readmemw_386(seg,addr+2) Shl 16)
EndIf
if (seg=&hFFFFFFFF) Then
'if deb=3 then print #5,"0 segment rl ",CS1,cs0,pc,opcode,addr
return -1
EndIf
if (cr0 Shr 31) Then
addr2=mmutranslatereal(addr2,0)
if (addr2=&hFFFFFFFF) Then return &hFFFFFFFF
EndIf
addr2 = addr2 And rammask
'If (addr2 Shr 15)<(RAM_TOTAL Shr 15) Then
addreadlookup(mem_logical_addr, addr2)
Return leeram4(addr2)
'EndIf
'if (_mem_read_l[addr2 Shr 15)) Then return _mem_read_l[addr2 Shr 15)(addr2)
'if (_mem_read_w[addr2 Shr 15)) Then return _mem_read_w[addr2 Shr 15)(addr2) Or (_mem_read_w[addr2 Shr 15)(addr2 + 2) Shl 16)
'if (_mem_read_b[addr2 Shr 15)) Then return _mem_read_b[addr2 Shr 15)(addr2) Or (_mem_read_b[addr2 Shr 15)(addr2 + 1) Shl 8) Or (_mem_read_b[addr2 Shr 15)(addr2 + 2) Shl 16) Or (_mem_read_b[addr2 Shr 15)(addr2 + 3) Shl 24)
Return &hffffffff
End Function
' esta llama a la anterior
Function readmeml_386(byval s As Ulong , byval a As ULong) As ULong
Return iif( (readlookup2[(s+a) Shr 12]=&hFFFFFFFF) or (s=&hFFFFFFFF) or (((s+a) And &hFFF)>&hFFC) ,readmeml_386l(s,a), _
leeram4(readlookup2[(s+a) Shr 12] + ((s+a) And &hFFF)))
End Function
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'''''''''''''''GRABA BYTE'''''''''''''''''''''''
Sub writememb_386l(ByVal seg As Ulong , ByVal addr As Ulong , ByVal valor As UByte )
If (seg=&hFFFFFFFF) Then
'if (deb=3) Then print #5,"SEG:";Hex(seg,8);" ADDR:";Hex(addr,8)
'if (deb=3) Then print #5,"error segment wb FFFFFFFF":sleep
return
EndIf
mem_logical_addr = addr + seg
addr = mem_logical_addr
if (cr0 Shr 31) Then
addr = mmutranslatereal(addr, 1)
if (addr = &hFFFFFFFF) Then return
EndIf
addr = addr And rammask
'If (addr Shr 15)<(RAM_TOTAL Shr 15) Then
addwritelookup(mem_logical_addr, addr)
grabaram1(addr,valor)
'EndIf
'if (_mem_write_b[addr Shr 15)) Then _mem_write_b[addr Shr 15)(addr, valor)
End Sub
' esta llama a la anterior
Sub writememb_386(ByVal s As Ulong, ByVal a As ULong, ByVal v As UByte)
If (writelookup2[(s+a) shr 12]=&hFFFFFFFF) Or (s=&hFFFFFFFF) Then
writememb_386l(s,a,v)
else
grabaram1(writelookup2[(s+a) shr 12]+((s+a) And &hFFF),v)
EndIf
End Sub
'''''''''''''''''''''''''''''''
'''''''''''''''GRABA PALABRA''''''''''''''''''''''''''''
Sub writememw_386l(ByVal seg As ULong , ByVal addr As Ulong , ByVal valor As UShort )
'Dim As ulong mem_logical_addr '''''''''''''''propia'''''''''''''''''''''''''''''''''''''''''''''
Dim As ULong addr2 = seg + addr
mem_logical_addr = addr2
' esta condicion solo se cumple si ADDR2=&HFFF nada mas.....
if ((addr2 And &hFFF)>&hFFE) Then
if (cr0 Shr 31) Then
if (mmutranslatereal(addr2, 1) = &hffffffff) Then return
if (mmutranslatereal(addr2+1, 1) = &hffffffff) Then return
EndIf
'if (is386) Then ' ya no lo necesito, nunca sera menos de 386
writememb_386(seg,addr,valor)
writememb_386(seg,addr+1,valor Shr 8)
'else
' writemembl(seg+addr,valor) ' solo para el 8086
' writemembl(seg+addr+1,valor Shr 8)
'EndIf
return
EndIf
if (seg=&hFFFFFFFF) Then
'if (deb=3) Then print #5,"0 segment ww",CS1,cs0,pc,opcode,addr
return
EndIf
if (cr0 Shr 31) Then
addr2=mmutranslatereal(addr2,1)
if (addr2=&hFFFFFFFF) Then return
EndIf
addr2 = addr2 And rammask
'If (addr2 Shr 15)<(RAM_TOTAL Shr 15) Then
addwritelookup(mem_logical_addr, addr2)
grabaram2(addr2,valor)
'EndIf
'if (_mem_write_w[addr2 Shr 15)) Then
' _mem_write_w[addr2 Shr 15)(addr2, valor)
' return
'EndIf
'if (_mem_write_b[addr2 Shr 15)) Then
' _mem_write_b[addr2 Shr 15)(addr2, valor)
' _mem_write_b[(addr2 + 1) Shr 15)(addr2 + 1, val Shr 8)
' return
'EndIf
End Sub
' esta llama a la anterior
Sub writememw_386(ByVal s As Ulong, ByVal a As ULong, ByVal v As UShort)
If (writelookup2[(s+a) shr 12]=&hFFFFFFFF) or (s=&hFFFFFFFF) Or (((s+a) And &hFFF)>&hFFE) Then
writememw_386l(s,a,v)
Else
grabaram2(writelookup2[(s+a) shr 12]+((s+a) And &hFFF),v)
EndIf
End Sub
'''''''''''''''''''''''''''''''''''''''''''''
'''''''''''''''''''GRABA LONG''''''''''''''''''''''''''
Sub writememl_386l(ByVal seg As Ulong , ByVal addr As Ulong , ByVal valor As ULong )
'Dim As ulong mem_logical_addr '''''''''''''''propia'''''''''''''''''''''''''''''''''''''''''''''
Dim As ULong addr2 = seg + addr
mem_logical_addr = addr2
if ((addr2 And &hFFF)>&hFFC) Then
if (cr0 Shr 31) Then
if (mmutranslatereal(addr2, 1) = &hffffffff) Then Return
if (mmutranslatereal(addr2+3, 1) = &hffffffff) Then return
EndIf
writememw_386l(seg,addr,valor)
writememw_386l(seg,addr+2,valor Shr 16)
return
EndIf
if (seg=&hFFFFFFFF) Then
'if deb=3 then print #5,"0 segment wl",CS1,cs0,pc,opcode,addr
return
EndIf
if (cr0 Shr 31) Then
addr2=mmutranslatereal(addr2,1)
if (addr2=&hFFFFFFFF) Then return
EndIf
addr2 = addr2 And rammask
'If (addr2 Shr 15)<(RAM_TOTAL Shr 15) Then
addwritelookup(mem_logical_addr, addr2)
grabaram4(addr2,valor)
'EndIf
'if (_mem_write_l[addr2 Shr 15)) Then
' _mem_write_l[addr2 Shr 15)(addr2, valor)
' return
'EndIf
'if (_mem_write_w[addr2 Shr 15)) Then
' _mem_write_w[addr2 Shr 15)(addr2, valor)
' _mem_write_w[addr2 Shr 15)(addr2 + 2, valor Shr 16)
' return
'EndIf
'if (_mem_write_b[addr2 Shr 15)) Then
' _mem_write_b[addr2 Shr 15)(addr2, valor)
' _mem_write_b[addr2 Shr 15)(addr2 + 1, valor Shr 8)
' _mem_write_b[addr2 Shr 15)(addr2 + 2, valor Shr 16)
' _mem_write_b[addr2 Shr 15)(addr2 + 3, valor Shr 24)
' return
'EndIf
End Sub
' esta llama a la anterior
Sub writememl_386(ByVal s As Ulong, ByVal a As ULong, ByVal v As ULong)
if (writelookup2[(s+a) shr 12]=&hFFFFFFFF) Or (s=&hFFFFFFFF) or (((s+a) And &hFFF)>&hFFC) Then
writememl_386l(s,a,v)
else
grabaram4(writelookup2[(s+a) Shr 12]+((s+a) And &hFFF),v)
EndIf
End Sub
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
' Esta rutina se llama solo desde el teclado, modulo "keyboard_at", runtina "keyboard_at_write"
' pero NO es para el teclado, sino para habilitar A20, y permitir mas de 1mb de RAM en 286 o posterior
' no entiendo por que lo activa el teclado, pero en internet, la gente se pregunta lo mismo!!!!
Sub mem_a20_recalc()
Dim As Integer state = mem_a20_key Or mem_a20_alt
if (state<>0) And (mem_a20_state=0) Then
rammask = &hffffffff
flushmmucache()
elseif (state=0) And (mem_a20_state<>0) Then
rammask = &hffefffff
flushmmucache()
EndIf
'print #5,"rammask ahora ";Hex( rammask,8)
mem_a20_state = state
End Sub
''''''''''''''''''''''''''''''''''''''''
' estas parecen usarse solo en X86SEG.C
''''''''''''''''''''''''''''''''''''''''
' esta es llamada unicamente por "writememb_x86", la de debajo suya
Sub writemembl_x86(ByVal addr As Ulong , ByVal valor As UByte )
mem_logical_addr = addr
if (cr0 Shr 31) Then
addr = mmutranslatereal(addr,1)
if (addr = &hFFFFFFFF) Then return
EndIf
addr = addr And rammask
'If (addr Shr 15)<(RAM_TOTAL Shr 15) Then
addwritelookup(mem_logical_addr, addr)
grabaram1(addr,valor)
'EndIf
'if (_mem_write_b[addr Shr 15]) Then _mem_write_b[addr Shr 15](addr, valor)
End Sub
' esta llama unicamente a la de arriba de esta
Sub writememb_x86(ByVal a As ULong , ByVal v As UByte )
'memcycs+=4 ' no se usa?
if (writelookup2[a Shr 12]=&hFFFFFFFF) Then
writemembl_x86(a,v) ' la rutina de arriba de este grupo
else
grabaram1(writelookup2[a Shr 12]+(a And &hFFF),v)
EndIf
End Sub
Sub writememw_x86(ByVal s As Ulong , ByVal a As ULong , ByVal v As UShort )
'memcycs+=8 'Shr is8086) ' ojo con esto, que NO deberia ser 8086
if (writelookup2[(s+a) Shr 12]=&hFFFFFFFF) Or (s=&hFFFFFFFF) Then
writememw_386l(s,a,v)
else
grabaram2(writelookup2[(s+a) Shr 12]+((s+a) And &hFFF),v)
EndIf
End Sub
Sub writememl_x86(ByVal s As Ulong , ByVal a As Ulong , ByVal v As ULong )
if (writelookup2[(s+a) Shr 12]=&hFFFFFFFF) Or (s=&hFFFFFFFF) Then
writememl_386l(s,a,v)
else
grabaram4(writelookup2[(s+a) Shr 12]+((s+a) And &hFFF),v)
EndIf
End Sub
' de lectura BYTE en X86_SEG unicamente y solo tres llamadas en TASKSWITCH
Function readmembl_x86(ByVal addr As ULong ) As UByte
' al parecer, solo lo usan las dos siguientes rutinas (aqui abajo ambas)
mem_logical_addr = addr
if (cr0 Shr 31) Then
addr = mmutranslatereal(addr, 0)
if (addr = &hFFFFFFFF) Then return &hFF
EndIf
addr = addr And rammask
'If (addr Shr 15)<(RAM_TOTAL Shr 15) Then
addreadlookup(mem_logical_addr, addr)
Return leeram1(addr)
'EndIf
'if (_mem_read_b[addr Shr 15]) Then return _mem_read_b[addr Shr 15](addr)
return &hFF
End Function
' esta es exclusivamente para el modulo "taskswitch286" del modulo X86SEG.C, y llama a la anterior a esta
Function readmemb_x86(ByVal a As Ulong ) As UByte
'if (a<>(cs0+pc)) Then memcycs+=4 ' no se de donde he sacado esto, pero en el original no va, lo quito por ahora
if (readlookup2[a Shr 12]=&hFFFFFFFF) Then
return readmembl_x86(a) ' rutina anterior a esta
Else
return leeram1(readlookup2[a Shr 12]+(a And &hFFF))
EndIf
End Function
''''''''''''''''''''''''''''''''''
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
''''' rutinas x86 ''''''
''''''''''''''''''''''''''''
' se usan en el modulo X86SEG.C nada mas, y es MUY, MUY importante, se emplea el 99% de las llamadas
'Function readmemw_x86(byval s As Ulong , ByVal a As ULong ) As UShort
' 'if (a<>(cs0+pc)) Then memcycs+=8' Shr is8086) ' ojo con esto, que NO deberia ser 8086
' if (readlookup2[(s+a) Shr 12]=&hFFFFFFFF) Or (s=&hFFFFFFFF) Or (((s+a) And &hFFF)>&hFFE) Then
' return readmemw_386(s,a)
' Else
' return leeram2(readlookup2[(s+a) Shr 12]+((s+a) And &hFFF))
' EndIf
'End Function
'Function readmeml_x86(byval s As Ulong , byval a As ULong) As ULong
' Return IIf ( (readlookup2[(s+a) shr 12]=&hFFFFFFFF) Or (s=&hFFFFFFFF) , readmeml_386l(s,a) , _
' (leeram4(readlookup2[(s+a) Shr 12]+((s+a) And &hFFF))) )
'End Function
'''''''''''''''''''''''''''''''
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
' rutina UNICAMENTE para FETCHCOMPLETE, nadie mas lo usa.
Function readmembf_x86(ByVal a As ULong ) As UByte
if (readlookup2[a Shr 12]=&hFFFFFFFF) Then
return readmembl_x86(a) ' rutina anterior a esta
else
return leeram1(readlookup2[a Shr 12]+(a And &hFFF))
EndIf
End Function
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Function getpccache(ByVal a As ULong ) As UByte Ptr
Dim As ULong a2=a
'Print #5,"getpccache:";Hex(readlookup2[a Shr 12]),Hex(a,8)
If (readlookup2[a Shr 12]<>&hFFFFFFFF) Then
'Print #5,Hex(a,8),Hex(readlookup2[a Shr 12] - (a And inv(&hFFF))):sleep
Return @ram[readlookup2[a Shr 12] - (a And inv(&hFFF))]
EndIf
If (cr0 Shr 31) Then
pctrans=1
a=mmutranslatereal(a,0)
pctrans=0
if (a=&hFFFFFFFF) Then Return ram ' es como devolver "@ram[0]", la primera direccion.
EndIf
a = a And rammask
If (isram(a Shr 16)) Then
' solo en zonas RAM (entre la 0 y &hA0000) y desde la FFFFF hasta acabar los megas)
If ((a Shr 16)<>&hF) Or (shadowbios<>0) Then addreadlookup(a2,a)
'If ((a And &hFFFFF000) - (a2 And inv(&hFFF)))<>0 Then
' Print #5,Hex(a And &hFFFFF000), hex(a2 And inv(&hFFF)),Hex((a And &hFFFFF000) - (a2 And inv(&hFFF))):sleep
'EndIf
Return @ram[(a And &hFFFFF000) - (a2 And inv(&hFFF))]
EndIf
Select Case As Const (a Shr 16)
case &hC ' direccion C0000 VROM
' if (a and &h 8000) then return @romext .... aqui va la lectura de ROMEXT, pero lo tengo desactivado
Return @vrom[(a And &h7000) - (a2 And inv(&hFFF))]
case &hE ' direccion E0000 ROM
If shadowbios Then Return @ram[ (a And &hFFF000) - (a2 And inv(&hFFF)) ]
Return @rom[((a And biosmask) And inv(&hfff)) - (a2 And inv(&hFFF))] ' ROM -->>ffff antes biosmask
case &hF ' direccion F0000 ROM
If shadowbios Then Return @ram[ (a And &hFFF000) - (a2 And inv(&hFFF)) ]
Return @rom[((a And biosmask) And inv(&hfff)) - (a2 And inv(&hFFF))] ' ROM
End Select
return @rom[(a And &hF000) - (a2 And inv(&hFFF))]
End Function
''''''' rutinas 386 ''''''''
Function fastreadw(ByVal a As ULong ) As UShort ' devuelve 16 bits, 2 bytes
Dim As ULong t =Any
' esta condicion solo se cumple si ADDR2=&HFFF nada mas.....
If ((a And &hFFF)>&hFFE) Then
t=readmemb_386(0,a)
t = t Or (readmemb_386(0,a+1) Shl 8)
return t
EndIf
' si la lectura esta dentro de 4096 bytes, usa el cache de 4k para leer
If ((a Shr 12)=pccache) Then Return (pccache2[a+1] Shl 8) Or pccache2[a]
pccache2=getpccache(a)
pccache=a Shr 12
return (pccache2[a+1] Shl 8) or pccache2[a]
End Function
Function fastreadl(ByVal a As ULong ) As ULong ' devuelve 32bits (4 bytes)
Dim As UByte Ptr t
Dim As ULong valor =Any
' si la lectura esta dentro de 4096 bytes, usa el cache de 4k para leer
If ((a And &hFFF)<&hFFD) Then
if ((a Shr 12)<>pccache) Then
'print #5,"fastreadl:";hex(a,8)':Sleep
t = getpccache(a)
'If abrt Then Print #5,"Error en fastreadl":Return 0
pccache2 = t
pccache=a Shr 12
EndIf
Return (pccache2[a+3] Shl 24) Or (pccache2[a+2] Shl 16) Or (pccache2[a+1] Shl 8) Or pccache2[a]
EndIf
valor = readmemb_386(0,a)
valor = valor Or (readmemb_386(0,a+1) Shl 8)
valor = valor Or (readmemb_386(0,a+2) Shl 16)
valor = valor Or (readmemb_386(0,a+3) Shl 24)
return valor