Knowledge (XXG)

Am386

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available at higher clock speeds at the time they were introduced and still cheaper than the Intel 386SX. Produced in 0.8 μm technology and using a static core, their clock speed could be dropped down to 0 MHz, consuming just some mWatts. Power consumption was up to 35% lower than with Intel's design and even lower than the 386SL's, making the AMD 386SX the ideal chip for both desktop and mobile computers. The SXL versions featured advanced power management functions and used even less power.
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In 1991 AMD also introduced advanced versions of the 386SX processor – again not as a second source production of the Intel chip, but as a reverse engineered pin compatible version. In fact, it was AMD's first entry in the x86 market other than as a second source for Intel. AMD 386SX processors were
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designs, and AMD's interpretation of the contract, made up in 1982, was that it covered all derivatives of them. Intel, however, claimed that the contract only covered the 80286 and prior processors and forbade AMD the right to manufacture 80386 CPUs in 1987. After a few years in the courtrooms, AMD
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While the AM386 CPU was essentially ready to be released prior to 1991, Intel kept it tied up in court. Intel learned of the Am386 when both companies hired employees with the same name who coincidentally stayed at the same hotel, which accidentally forwarded a package for AMD to Intel's employee.
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in 1989, AMD introduced 40 MHz versions of both its 386DX and 386SX out of the gate, extending the lifespan of the architecture. In the following two years the AMD 386DX-40 saw popularity with small manufacturers of PC clones and with budget-minded computer enthusiasts because it offered
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performance at a much lower price than an actual 486. Generally the 386DX-40 performs nearly on par with a 25 MHz 486 due to the 486 needing fewer clock cycles per instruction, thanks to its tighter
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using floating point intensive calculations. However, both were niche markets in the early 1990s and the chip sold well, first as a mid-range contender, and then as a budget chip. Although
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finally won the case and the right to sell their Am386 in March 1991. This also paved the way for competition in the
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using the older 386 CPUs often had limited memory expansion possibilities and therefore struggled under
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AMD (Advanced Micro Devices) AM386DE-33KC 32-BIT, 33 MHz, MICROPROCESSOR, PQFP132 pdf datasheet
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32-bit data bus, can select between either a 32-bit bus or a 16-bit bus by use of the BS16 input
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32-bit data bus, can select between either a 32-bit bus or a 16-bit bus by use of the BS16 input
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in March 1991. It sold millions of units, positioning AMD as a legitimate competitor to
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applications. The Am386 and its low-power successors were also popular choices for
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AMD Am386 Microprocessors for Personal Computers Datasheet 15021 and 15022
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24-bit physical address space, 16 Mbyte physical memory address space
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32-bit physical address space, 4 Gbyte physical memory address space
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32-bit physical address space, 4 Gbyte physical memory address space
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AMD Am386DE Block Diagram There is not a Paging Unit like a DX CPU
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performance of the Am386 could be boosted with the addition of a
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gave the 386DX-40 comparatively good memory and I/O performance.
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AMD had previously been a second-source manufacturer of Intel's
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of the 486DX. This made the Am386DX a suboptimal choice for
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Wafer of an Am386 processor with Intel copyright notice.
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The Am386DE-33 is an embedded version of the Am386DX-33
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A scan of an AMD Am386™DX-40 mounted on a PGA adapter.
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prefetch unit reads two bytes as one unit (like the
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Part 2 394:While Intel's 386 CPUs had topped out at 33 30: 1034: 1032: 1030: 1028: 1667: 1618: 1425: 1294: 1280: 1272: 467:A PQFP Am386DX-40 on a 132-pin PGA adapter 785: 635: 514: 1222:AMD.com: Am386 Family 32-bit Processors 991: 946: 727: 421: 1935:Computer-related introductions in 1991 29: 772:16-bit data bus, no bus sizing option 698: 593: 7: 1242:Shvets, Gennadiy (5 November 2011). 1039:Shvets, Gennadiy (5 November 2011). 968:A Cyrix FasMath 387DX-33 Coprocessor 1904:indicates an upcoming architecture. 25: 1099:"Intel Loses Trademark Decision" 1097:Pollack, Andrew (2 March 1991). 973: 961: 949: 754: 742: 730: 484: 472: 460: 448: 436: 424: 36: 629:fetches code in four-byte units 508:fetches code in four-byte units 159:Architecture and classification 42:An AMD 80386DX-40 in a 132-pin 1227:AMD Am386SX/SXL/SXLV Datasheet 1: 167:Desktop, Embedded (DE-Models) 1175:"The AMD Am386 SX Processor" 1007:"The AMD Am386 DX Processor" 980:An ULSI 387SX-40 Coprocessor 1232:cpu-collection.de: Pictures 1070:The Art of Thinking Clearly 956:An IIT 387SX-25 Coprocessor 1951: 1244:"AMD 80386 microprocessor" 1117:"386DX-40 and competitors" 1041:"AMD 80386 microprocessor" 130:20 MHz to 40 MHz 119:20 MHz to 40 MHz 1896: 1208:, AMD Datasheet no 15022. 876: 862: 848: 834: 828: 825: 704: 701: 690: 684: 675: 582: 571: 560: 554: 551: 35: 27:AMD microprocessor clone 1925:AMD x86 microprocessors 211:Physical specifications 1930:X86 microarchitectures 1121:the red hill cpu guide 511:released in March 1991 366: 355: 361: 353: 316:100%-compatible clone 146:Motherboard dependent 195:Instruction set 173:Technology node 788: 638: 517: 322:design released by 83:Common manufacturer 52:General information 32: 1421:Microarchitectures 1406:Microarchitectures 1204:2016-03-04 at the 1103:The New York Times 860:AMD Am386SX/SXL-33 846:AMD Am386SX/SXL-25 823:AMD Am386SX/SXL-20 786: 636: 591:AMD Am386DX/DXL-40 580:AMD Am386DX/DXL-33 569:AMD Am386DX/DXL-25 549:AMD Am386DX/DXL-20 515: 367: 356: 346:History and design 336:CPUs (then termed 46:, soldered onboard 1912: 1911: 1892: 1891: 1659: 1658: 1610: 1609: 1179:cpu-collection.de 1150:on 1 January 2014 1083:978-0-06-221968-8 1011:cpu-collection.de 916:applications and 890:80387 coprocessor 887: 886: 717: 716: 615: 614: 305: 304: 183:Microarchitecture 16:(Redirected from 1942: 1668: 1619: 1615:Current products 1569:Bobcat (aka 14h) 1562:x86-64 low-power 1426: 1296: 1289: 1282: 1273: 1258: 1256: 1254: 1209: 1197: 1191: 1190: 1188: 1186: 1171: 1160: 1159: 1157: 1155: 1146:. Archived from 1139: 1133: 1132: 1130: 1128: 1113: 1107: 1106: 1094: 1088: 1087: 1072:(1st ed.). 1062: 1056: 1055: 1053: 1051: 1036: 1023: 1022: 1020: 1018: 1003: 977: 965: 953: 938:embedded systems 789: 758: 746: 734: 710:AMD Am386DE-33GC 696:AMD Am386DE-33KC 673:AMD Am386DE-25KC 639: 518: 488: 476: 464: 455:A PGA Am386DX-40 452: 440: 428: 177:1.5 μm to 0.8 μm 40: 33: 21: 1950: 1949: 1945: 1944: 1943: 1941: 1940: 1939: 1915: 1914: 1913: 1908: 1907: 1888: 1843: 1771: 1686: 1655: 1606: 1588: 1557: 1457: 1415: 1305: 1300: 1252: 1250: 1241: 1218: 1213: 1212: 1206:Wayback Machine 1198: 1194: 1184: 1182: 1173: 1172: 1163: 1153: 1151: 1141: 1140: 1136: 1126: 1124: 1115: 1114: 1110: 1096: 1095: 1091: 1084: 1064: 1063: 1059: 1049: 1047: 1038: 1037: 1026: 1016: 1014: 1005: 1004: 993: 988: 981: 978: 969: 966: 957: 954: 892: 769: 762: 759: 750: 747: 738: 735: 722: 705:1.05-1.35 Watt 620: 499: 492: 489: 480: 477: 468: 465: 456: 453: 444: 441: 432: 429: 411:. However, its 365:of AMD Am386DX. 348: 276: 272: 267: 256: 242: 227: 92: 47: 28: 23: 22: 15: 12: 11: 5: 1948: 1946: 1938: 1937: 1932: 1927: 1917: 1916: 1910: 1909: 1906: 1905: 1898: 1897: 1894: 1893: 1890: 1889: 1887: 1886: 1885: 1884: 1874: 1869: 1868: 1867: 1857: 1851: 1849: 1845: 1844: 1842: 1841: 1836: 1831: 1826: 1825: 1824: 1814: 1809: 1804: 1803: 1802: 1797: 1786: 1784: 1773: 1772: 1770: 1769: 1764: 1759: 1754: 1753: 1752: 1747: 1737: 1732: 1727: 1722: 1717: 1712: 1707: 1701: 1699: 1688: 1687: 1685: 1684: 1678: 1676: 1665: 1661: 1660: 1657: 1656: 1654: 1653: 1648: 1643: 1638: 1632: 1630: 1616: 1612: 1611: 1608: 1607: 1605: 1604: 1598: 1596: 1590: 1589: 1587: 1586: 1585: 1584: 1579: 1571: 1565: 1563: 1559: 1558: 1556: 1555: 1554: 1553: 1546: 1541: 1536: 1531: 1526: 1521: 1516: 1506: 1505: 1504: 1499: 1494: 1489: 1481: 1476: 1471: 1465: 1463: 1462:x86-64 desktop 1459: 1458: 1456: 1455: 1450: 1445: 1439: 1437: 1423: 1417: 1416: 1414: 1413: 1408: 1403: 1398: 1397: 1396: 1391: 1386: 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Retrieved 1010: 944:processors. 934:Windows 3.1x 922:motherboards 893: 792:Model number 767:Am386SX data 723: 642:Model number 618:Am386DE data 521:Model number 497:Am386DX data 415:40 MHz 393: 387:-compatible 368: 337: 331: 308: 306: 273:132-pin PQFP 263: 260:100-pin PQFP 252: 249:132-pin PQFP 238: 97:Product code 1671:Early x86 ( 1497:Steamroller 1253:29 November 1185:30 November 1154:12 November 1127:12 November 1050:29 November 1017:12 November 906:coprocessor 877:40 MHz 863:33 MHz 849:25 MHz 826:20 MHz 699:33 MHz 676:25 MHz 594:40 MHz 583:33 MHz 572:25 MHz 552:20 MHz 380:Intel 80286 376:Intel 80186 339:8086-family 320:Intel 80386 286:Predecessor 164:Application 105:Performance 75:Designed by 65:Marketed by 1919:Categories 1492:Piledriver 1317:Processors 986:References 926:Windows 95 914:scientific 597:2.10 Watt 586:1.73 Watt 575:1.31 Watt 405:pipelining 372:Intel 8086 264:DE variant 257:88-pin PGA 253:SX variant 239:DX variant 115:clock rate 1790:Athlon 64 1502:Excavator 1487:Bulldozer 1453:Athlon/K7 1248:CPU-World 1045:CPU-World 880:1.55 Watt 866:1.35 Watt 795:Frequency 645:Frequency 605:3.03 Watt 558:1.05 Watt 524:Frequency 409:CPU cache 296:Successor 18:AMD Am386 1767:AMD Élan 1411:Chipsets 1202:Archived 1068:(2013). 835:100-pin 720:AM386 SX 685:132-pin 608:132-pin 561:132-pin 417:data bus 268:132-pin 243:132-pin 232:Packages 151:L2 cache 57:Launched 1902:Italics 1877:Alchemy 1872:Am29000 1834:Opteron 1807:Sempron 1514:1st gen 1389:Opteron 1379:Sempron 903:80387SX 899:80387DX 804:Voltage 654:Voltage 533:Voltage 318:of the 281:History 1882:MIPS32 1860:Am2900 1855:Am9080 1817:Phenom 1812:Turion 1781:64-bit 1777:x86-64 1740:Athlon 1735:K6-III 1715:Am5x86 1696:32-bit 1673:16-bit 1636:Athlon 1627:64-bit 1623:x86-64 1577:Jaguar 1534:Zen 3+ 1434:32-bit 1384:Turion 1359:Phenom 1332:Athlon 1181:. 2011 1123:. 2011 1080:  1013:. 2011 930:MS-DOS 814:Socket 664:Socket 543:Socket 413:32-bit 389:32-bit 127:speeds 1848:Other 1762:Geode 1757:Duron 1710:Am486 1705:Am386 1692:IA-32 1682:Am286 1641:Ryzen 1594:ARM64 1550:Zen 6 1544:Zen 5 1539:Zen 4 1529:Zen 3 1524:Zen 2 1430:IA-32 1374:Duron 1369:Ryzen 1310:Lists 883:1991 869:1992 841:1991 809:Power 780:80286 679:3-5 V 659:Power 538:Power 401:80486 399:near- 385:80386 328:Intel 314:is a 309:Am386 300:Am486 290:Am286 217:Cores 204:IA-32 188:80386 142:cache 135:Cache 110:Max. 100:23936 31:Am386 1865:list 1730:K6-2 1651:Epyc 1582:Puma 1573:16h 1519:Zen+ 1483:15h 1401:APUs 1394:Epyc 1255:2011 1187:2011 1156:2011 1129:2011 1078:ISBN 1052:2011 1019:2011 837:PQFP 687:PQFP 610:PQFP 563:CPGA 378:and 307:The 154:none 60:1991 44:PQFP 1509:Zen 932:or 918:CAD 910:FPU 901:or 829:5 V 799:FSB 702:5 V 649:FSB 555:5 V 528:FSB 396:MHz 363:Die 342:). 333:x86 324:AMD 312:CPU 270:PGA 245:PGA 200:x86 140:L1 125:FSB 112:CPU 89:AMD 78:AMD 69:AMD 1921:: 1829:FX 1822:II 1800:II 1795:X2 1750:MP 1745:XP 1725:K6 1720:K5 1474:K9 1469:K8 1448:K6 1443:K5 1364:FX 1352:II 1347:X2 1342:64 1337:XP 1327:K6 1322:K5 1246:. 1177:. 1164:^ 1119:. 1101:. 1043:. 1027:^ 1009:. 994:^ 942:PC 782:). 691:? 374:, 1783:) 1779:( 1698:) 1694:( 1675:) 1629:) 1625:( 1436:) 1432:( 1295:e 1288:t 1281:v 1257:. 1189:. 1158:. 1131:. 1105:. 1086:. 1054:. 1021:. 266:: 255:: 241:: 224:1 206:) 202:( 20:)

Index

AMD Am386

PQFP
AMD
CPU
clock rate
FSB
cache
Technology node
Microarchitecture
80386
Instruction set
x86
IA-32
Cores
PGA
PGA
Am286
Am486
CPU
100%-compatible clone
Intel 80386
AMD
Intel
x86
8086-family


Die
Intel 8086

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