-
Notifications
You must be signed in to change notification settings - Fork 2
/
mem.bas
1001 lines (750 loc) · 33.5 KB
/
mem.bas
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
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