372:
360:
311:) while having a pin out similar to the existing 386SX, enabling existing board designs to be easily modified for the new chip. It ran at speeds of 20, 25, 33, and 40 MHz, although it had difficulty running reliably at 40 MHz using some operating systems. In December 1992 Cyrix also released the Cyrix Cx486SLC/e (25, 33 MHz) which offered power management, and a low voltage laptop version, the 3.3v Cyrix Cx486SLC/e-V (20, 25 MHz). In December 1993 Cyrix released a clock doubled version (25/50 MHz) cx486SLC2, as well as a clip-on upgrade for 386SX systems, the cx486SRx2 (16/33, 20/40 & 25/50 MHz).
348:
31:
384:
291:
manufactured the 486SLC for Cyrix. Texas
Instruments also sold it under its own name as TX486SLC. Later, Texas Instruments also released their own version of the chip, the TI486SXLC which featured 8KB internal cache vs 1KB in the original Cyrix design. These chips went under the name Potomac, and
935:
Before even announcing the chip in March of 1992, Intel filed a lawsuit against Cyrix for patent infringement. Prior to this, Cyrix asked for a declaratory judgement that would prevent Intel from suing Cyrix. Texas
Instruments joined the suit shortly after with an intervene, siding with Cyrix.
939:
Cyrix used SGS-Thomson as a second manufacturer of the chip, as the company had license to use Intel's patents. Intel however claimed the licence SGS-Thomson had was never intended to allow companies like Cyrix to circumvent Intel patents, which Intel stated was "patent laundering".
266:
units and offered better performance at a comparable or lower price. It was announced in March of 1992, and released 2 months later in May, with a price of $ 119. It was priced competitively against the
948:
Cyrix is entitled to judgment in its favor on its affirmative defenses of patent exhaustion and implied license based on the use or resale of its claim 1 microprocessors purchased from TI and ST.
318:
added. Unfortunately it inherited the 386SX's 24-bit address bus (16 MB max. DRAM), and 16-bit datapath which limited its memory bandwidth. Like the 386 and 486SX, it had no on-board
326:
coprocessor. Due to the limitations of the 386SX's bus and its smaller L1 cache, its performance could not compete with the 486SX when the latter was running on a full 32-bit bus.
371:
359:
767:
The TI486SXLC/SXLC was Texas
Instrument's version of the Cx486SLC. They had 8 KB of cache over the original 1 KB, a 32-bit internal data bus, and supported clock-doubling.
664:
1456:
1507:
1476:
1168:
1145:
404:
The base 486SLC, which had speeds of 20, 25, 33, and 40 MHz with 1 KB of cache and a 16-bit bus. A later version, the 486SLC2, ran at 50 MHz.
771:
1351:
1390:
1502:
1105:
1078:
1233:
1200:
1419:
983:
1512:
1312:
1050:
1022:
1446:
1272:
183:
1282:
1243:
1210:
1115:
1484:
300:
are often confused with the Cyrix chips, but are not related and instead based on an Intel CPU core.
1395:
255:
105:
347:
1051:"Competition benefits consumers, Advancing technology produces good buys on computer chips"
204:
8:
259:
283:
bus, and was intended as an entry-level chip to compete with the Intel 386SX and 486SX.
271:
486SX, causing Intel to lower the price of their chip from $ 286 to $ 119 in just days.
1424:
1173:
284:
314:
The 486SLC can be described as a 386SX with the 486 instruction set and 1K of onboard
296:, 486SLC2, 486SLC3 (16-bit external bus version of IBM 486DLC aka Blue Lightning) and
1365:
1326:
1286:
1247:
1154:
1119:
997:
816:
709:
448:
288:
61:
30:
1361:
1322:
383:
17:
924:
Clip-on upgrade version of the SLC, compatible with the 386SX-16, 20, or 25 MHz.
337:. The 486SLC was also available as a 32-bit version based on the i386DX bus, see
880:
322:, but unlike the 486SX, it could make use of an Intel i287, 387SX or compatible
1027:
993:
962:
118:
1496:
1369:
1330:
1290:
1251:
1123:
1001:
988:
1055:
307:
it was a hybrid CPU, incorporating features of a new CPU (in this case the
304:
220:
1273:"Is the Cyrix 386-to-486 Upgrade Chip really that good? Just ask anybody"
330:
308:
238:
16:"486SLC" redirects here. For the unrelated IBM CPU of the same name, see
333:
and PC clones. Because of its low power consumption, it also saw use in
868:† - Can operate at nonclock-doubled 40 MHz or clock-doubled 20/40 MHz.
293:
108:
1277:
1238:
1205:
1110:
151:
315:
292:
Cyrix would receive full royalties for them. The similarly named
1451:
1447:"Cyrix Corp. v. Intel Corp., 846 F. Supp. 522 (E.D. Tex. 1994)"
1356:
1317:
338:
334:
297:
280:
188:
1169:"COMPANY NEWS; TEXAS INSTRUMENTS INTRODUCES LINE OF 486 CHIPS"
268:
263:
251:
192:
57:
329:
The 486SLC was primarily used in very inexpensive low-end
323:
319:
303:
Introduced in May 1992, like the later and more famous
1147:
TI486SXLC and TI486SXL Microprocessors
Reference Guide
966:- Cyrix's next CPU offering, released in June of 1992.
756:
Advanced power management, low voltage, 100-pin QFP.
561:
Advanced power management, low voltage, 100-pin QFP.
473:
Advanced power management, low voltage, 100-pin QFP.
1079:"TEXAS "TO MAKE CYRIX Cx486" AS WELL AS SGS THOMSON"
377:
Cyrix Cx486SLC with 87SLC co-processor (bottom view)
1023:"Cyrix-Intel market fight heats up with new chip"
365:Cyrix Cx486SLC with 87SLC co-processor (top view)
1494:
250:is a x86 microprocessor that was developed by
943:The lawsuit, which concluded in 1994, stated:
1489:Mentions Cyrix Cx486SLC in the Introduction.
863:100-pin QFP for compatibility with 486SLC.
841:100-pin QFP for compatibility with 486SLC.
258:offerings, released after years of selling
1391:"TI asks to intervene in Cyrix-Intel suit"
930:
1352:"Fast Inroads for Cyrix 486 Hybrid Chip"
1201:"Cyrix gains customers for its 486 chip"
734:Advanced power management, 100-pin QFP.
660:TI's rebranded version of the Cx486SLC.
627:Advanced power management, 100-pin QFP.
605:Advanced power management, 100-pin QFP.
539:Advanced power management, 100-pin QFP.
517:Advanced power management, 100-pin QFP.
1417:
1234:"Cyrix readies clock-doubled processor"
1231:
1198:
1103:
1508:Computer-related introductions in 1992
1495:
1106:"TI licenses Cyrix 486SLC Technology"
1310:
1194:
1192:
1232:Polilli, Steve (15 November 1993).
815:Low power version of SXLC, 100-pin
708:Advanced power management, 100-pin
13:
762:
14:
1524:
1418:Pollack, Andrew (30 March 1992).
1189:
772:TI 486SXLC/486SXL Reference Guide
274:
1420:"New Rival For Intel's Key Chip"
665:TI 486SLC/486DLC Reference Guide
399:
382:
370:
358:
346:
29:
1459:from the original on 2015-10-02
1439:
1411:
1383:
1364:16 June 1992. pp. 29, 32.
1344:
1311:Barr, Christopher (July 1992).
1304:
1265:
819:for compatibility with 486SLC.
170:Architecture and classification
1225:
1161:
1137:
1097:
1071:
1043:
1015:
984:"It's a 386 - no, it's a 486!"
976:
254:. It was one of Cyrix's first
1:
1483:. 5 July 2001. Archived from
1360:. Vol. 11, no. 11.
1313:"Is the 486SLC a 386 or 486?"
1199:Quinlan, Tom (6 April 1992).
1114:. Vol. 14, no. 20.
970:
881:Cx486DRx2/Cx486SRx2 Datasheet
35:Cyrix Cx486SLC Microprocessor
1104:Quinlan, Tom (18 May 1992).
996:. 30 March 1992. p. 8.
874:
18:IBM 386SLC § IBM 486SLC
7:
1285:25 April 1994. p. 79.
1283:InfoWorld Media Group, Inc.
1244:InfoWorld Media Group, Inc.
1211:InfoWorld Media Group, Inc.
1116:InfoWorld Media Group, Inc.
955:
655:
394:
279:The 486SLC is based on the
10:
1529:
124:20 MHz to 40 MHz
113:20 MHz to 50 MHz
15:
1503:Cyrix x86 microprocessors
1399:. 3 June 1992. p. 37
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98:
75:
67:
53:
45:
40:
28:
1396:Fort Worth Star-Telegram
1321:. Vol. 11, No. 13.
1242:. Vol. 15, No. 46.
1209:. Vol. 14, No. 14.
992:. Vol. 26, No. 13.
199:Physical specifications
1513:X86 microarchitectures
1477:"VIA C3 (AKA Cyrix 3)"
953:
951:
931:Intel v. Cyrix lawsuit
952:
945:
1157:. 1994. p. 1.2.
320:x87 math coprocessor
184:Instruction set
1455:. 21 January 1994.
883:
774:
667:
262:that competed with
76:Common manufacturer
41:General information
25:
1425:The New York Times
1174:The New York Times
879:
847:TI486SXLC2-050-PJF
770:
663:
23:
1155:Texas Instruments
928:
927:
872:
871:
825:TI486SXLC-040-PJF
799:TI486SXLC-V25-PJF
760:
759:
653:
652:
449:quad flat package
289:Texas Instruments
260:math coprocessors
244:
243:
85:Texas Instruments
62:Texas Instruments
1520:
1488:
1487:on 29 July 2020.
1469:
1468:
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1432:
1415:
1409:
1408:
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1362:Ziff Davis, Inc.
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1342:
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1339:
1337:
1323:Ziff Davis, Inc.
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1302:
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1177:. 8 October 1993
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1008:
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884:
878:
775:
769:
718:TI486SLC/E-33PAF
668:
662:
611:Cx486SLC/E-40-MP
589:Cx486SLC/E-33-MP
545:Cx486SLC/E-V25MP
523:Cx486SLC/E-25-QP
501:Cx486SLC/E-25-MP
407:
406:
386:
374:
362:
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162:8 KB (TI486SXLC)
33:
26:
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1085:. 31 March 1992
1077:
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1059:. 16 April 1993
1049:
1048:
1044:
1034:
1032:
1031:. 31 March 1992
1021:
1020:
1016:
1006:
1004:
982:
981:
977:
973:
958:
933:
908:Cx486SRx2-25/50
877:
765:
763:TI486SXLC/SXLC2
658:
402:
397:
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387:
378:
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366:
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215:
165:
94:
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1070:
1042:
1028:The Desert Sun
1014:
994:IDG Enterprise
974:
972:
969:
968:
967:
963:Cyrix Cx486DLC
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487:
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459:
457:Cx486SLC/E-V20
453:
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275:Specifications
273:
248:Cyrix Cx486SLC
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50:
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43:
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38:
37:
34:
24:Cyrix Cx486SLC
9:
6:
4:
3:
2:
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989:Computerworld
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649:100-pin QFP.
648:
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631:
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623:
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592:
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583:100-pin QFP.
582:
579:
576:
573:
570:
568:
567:Cx486SLC-33MP
565:
564:
560:
557:
554:
551:
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538:
535:
532:
529:
526:
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510:
507:
504:
502:
499:
498:
495:100-pin QFP.
494:
491:
488:
485:
482:
480:
479:Cx486SLC-25MP
477:
476:
472:
469:
466:
463:
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440:
437:
434:
432:
429:
428:
424:
421:
418:
415:
412:
409:
408:
405:
400:Cx486SLC/SLC2
385:
380:
373:
368:
361:
356:
349:
344:
343:
342:
340:
336:
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327:
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306:
301:
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185:
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177:
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139:
137:Address width
135:
131:
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116:
112:
110:
107:
102:
97:
87:
84:
83:
81:
80:
78:
74:
70:
66:
63:
59:
56:
52:
48:
44:
39:
32:
27:
19:
1485:the original
1480:
1461:. Retrieved
1450:
1441:
1429:. Retrieved
1423:
1413:
1401:. Retrieved
1394:
1385:
1373:. Retrieved
1355:
1346:
1334:. Retrieved
1325:p. 40.
1316:
1306:
1294:. Retrieved
1276:
1267:
1255:. Retrieved
1246:p. 38.
1237:
1227:
1215:. Retrieved
1204:
1179:. Retrieved
1172:
1163:
1146:
1144:"Features".
1139:
1127:. Retrieved
1109:
1099:
1087:. Retrieved
1083:Tech Monitor
1082:
1073:
1061:. Retrieved
1056:Argus-Leader
1054:
1045:
1033:. Retrieved
1026:
1017:
1005:. Retrieved
987:
978:
961:
947:
946:
942:
938:
934:
907:
846:
824:
798:
766:
740:TI486SLC/E-V
739:
717:
691:
659:
633:Cx486SLC2-50
632:
610:
588:
566:
544:
522:
500:
478:
456:
430:
403:
331:motherboards
328:
313:
305:Cyrix Cx5x86
302:
278:
247:
245:
221:Co-processor
159:1 KB (Cx486)
1463:15 February
1431:15 February
1403:21 February
1375:15 February
1118:p. 6.
1063:21 February
1035:20 February
1007:22 February
829:20-40 MHz†
431:Cx486SLC-20
309:Intel 80486
285:SGS-Thomson
239:Cyrix Cx486
175:Application
99:Performance
88:SGS-Thomson
68:Designed by
54:Marketed by
1497:Categories
1336:3 February
1296:3 February
1257:2 February
1217:2 February
1213:p. 29
1181:8 February
971:References
893:Frequency
890:Bus Speed
784:Frequency
781:Bus Speed
692:TI486SLC/E
677:Frequency
674:Bus Speed
416:Frequency
413:Bus Speed
298:IBM 386SLC
294:IBM 486SLC
225:287, 387SX
129:Data width
109:clock rate
1481:TweakTown
1370:0888-8507
1331:0888-8507
1291:0199-6649
1278:InfoWorld
1252:0199-6649
1239:InfoWorld
1206:InfoWorld
1124:0199-6649
1111:InfoWorld
1002:0010-4841
875:Cx486SRx2
389:TI486SXLC
235:Successor
1457:Archived
956:See also
899:Voltage
790:Voltage
683:Voltage
656:TI486SLC
447:100-pin
422:Voltage
395:Versions
353:TI486SLC
316:L1 cache
49:May 1992
46:Launched
1129:3 March
1089:2 March
915:50 MHz
912:25 MHz
854:50 MHz
851:25 MHz
832:40 MHz
806:25 MHz
803:25 MHz
747:25 MHz
744:25 MHz
725:33 MHz
722:33 MHz
699:25 MHz
696:25 MHz
640:50 MHz
637:25 MHz
618:40 MHz
615:40 MHz
596:33 MHz
593:33 MHz
574:33 MHz
571:33 MHz
552:25 MHz
549:25 MHz
530:25 MHz
527:25 MHz
508:25 MHz
505:25 MHz
486:25 MHz
483:25 MHz
464:20 MHz
461:20 MHz
451:(QFP).
438:20 MHz
435:20 MHz
335:laptops
264:Intel's
230:History
178:Desktop
1452:Justia
1368:
1357:PC Mag
1329:
1318:PC Mag
1289:
1250:
1122:
1000:
921:3.3 V
902:Notes
896:Cache
887:Model
812:3.3 V
793:Notes
787:Cache
778:Model
686:Notes
680:Cache
671:Model
558:3.3 V
470:3.3 V
425:Notes
419:Cache
410:Model
339:486DLC
281:i386SX
189:x86-16
121:speeds
1151:(PDF)
918:1 kB
857:8 kB
835:8 KB
809:8 kB
750:1 KB
728:1 KB
702:1 KB
643:1 kB
621:1 kB
599:1 kB
577:1 kB
555:1 kB
533:1 kB
511:1 kB
489:1 kB
467:1 kB
441:1 KB
269:Intel
252:Cyrix
205:Cores
193:IA-32
152:cache
145:Cache
104:Max.
71:Cyrix
58:Cyrix
1465:2022
1433:2022
1405:2022
1377:2022
1366:ISSN
1338:2022
1327:ISSN
1298:2022
1287:ISSN
1259:2022
1248:ISSN
1219:2022
1183:2022
1131:2022
1120:ISSN
1091:2022
1065:2022
1037:2022
1009:2022
998:ISSN
860:5 V
753:3 V
731:5 V
705:5 V
646:5 V
624:5 V
602:5 V
580:5 V
536:5 V
514:5 V
492:5 V
444:5 V
287:and
246:The
838:5V
817:QFP
710:QFP
324:x87
256:CPU
150:L1
119:FSB
106:CPU
1499::
1479:.
1449:.
1422:.
1393:.
1354:.
1315:.
1281:.
1275:.
1236:.
1203:.
1191:^
1171:.
1153:.
1108:.
1081:.
1053:.
1025:.
986:.
712:.
341:.
191:,
140:24
132:16
60:,
1467:.
1435:.
1407:.
1379:.
1340:.
1300:.
1261:.
1221:.
1185:.
1133:.
1093:.
1067:.
1039:.
1011:.
212:1
20:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
