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Fast loader

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times faster, but programs can only be loaded with a loader saved to disk when the cartridge is not present. Whereas the ARMK6 fastloader was compatible with most software, The Final Cartridge III was known to crash often, so programs had to be loaded in normal C64 mode, deactivating the cartridge, making it more or less useless.
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in the C64 and the DOS ROM in the 1541. While these were more difficult to install, they offered greatly increased compatibility, being almost invisible to software running on the machine. The cartridge, Action Replay MK6 RAM loader loads a 202 block program in around 9 seconds. Its Warp loader is 25
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Many commercial programs for the C64, especially games, contained their own fast-loading routines on the distribution media. The user would load a small "stub" program from the disk with the standard slow routines, which would then install faster transfer routines in both the computer and the drive
685:, written by David Aubrey-Jones and David Looker in 1983. The two programmers had become frustrated at the slow loading times of the computer's tape loading system, and realised it would be possible to write a better one. The prototype sat unused for about a year, but was finally picked up by 803:
came with a fast loading version on one side of the cassette and a conventional loading version on the other. Soon enough other software houses jumped on board. Ocean used "pavloda" and a real breakthrough came with the Novaload software which allowed loading screens and music to play.
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routine. Next, the fast loader would transfer the necessary code into the drive RAM and order its execution, then receive the file sent by the altered transfer code. Depending on the exact nature of the routines used, the loading speed could be improved by as much as a factor of five.
649: 779:'s own use. The loader itself has a copyright date of 1987, but the first games that used the loader showed up in 1988. Over the following years, Mastertronic used the loader in dozens of titles. The loader was also memorable for the soundtrack, originally made by 715:
without the protection. Early versions used a set of audible "clicking" lead tones when loading a program. Later versions did not include this, but instead had a counter showing the time left to finish loading the program, similar to those of
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disk drive still had a 6522 VIA. Commodore chose not to redesign the 1541 hardware, also in order to retain backward compatibility with VIC-20 peripherals; this however came at the expense of speed. Because of the transfer protocol, the
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This technique was used for a few of the many fast-load systems made (such as JiffyDOS). Others were simply more efficient in I/O and file handling, offering marginal to good improvement. Other products added parallel hardware.
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In the UK, where the price of a 1541 disk drive was beyond the means of many of the target audience of C64 owners, there was enormous demand for fast loaders for C64 games. One of the first to use such a loader was
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It was printed yet again in August 1986, without the VIC-20 version, but with several accompanying utilities to relocate the program in memory and to create auto-booting software that took advantage of
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before proceeding to load the rest of the program at high speed. This way, the user benefited from the fast loader without having to buy or know about a dedicated fast-loader product.
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tapes were made for safe storing rather than speed. Better tape quality in the 1980s made it possible to store data more effectively, reducing loading time and tape length.
453:, which could "steal" CPU cycles. Some fast loaders disabled interrupts and blanked the screen for this reason. A fast loader would generally "wedge" itself into the 1586: 707:
in 1985. The system used several advanced features of the Spectrum's architecture, such as the memory refresh register and parity branch instructions of the
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line (which was normally used to perform the handshaking). On the C64, this required very careful timing to avoid interference from interrupts and from the
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on both the drive and computer. However, hardware bugs were discovered in the 6522 that prevented this function from working consistently. As a result, the
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Fast loaders came about because of a discrepancy between the actual speed at which floppy drives could transfer data and the speed that was provided by the
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in the C64 ran at approximately the same speed as that in the 1541 disk drive, it was sufficient to synchronize only at the beginning of each
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disk drive was the original plan put into action and a hardware shift register was used, reducing the need for special fast loaders.
1492: 1467: 1441: 287: 269: 167: 70: 1337: 1103: 1077: 105: 98: 1051: 1025: 491:. Most fast loader cartridges also incorporated other features to increase ease of use. An on-board implementation of Commodore's 1233: 557:, a fast loader that included C64 and VIC-20 versions. This program proved popular and was republished in the July 1985 issue of 1207: 1181: 981: 955: 929: 749:
was a fast loader for cassette-based games which not only accelerated the loading of blocks from the tape, but also contained a
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in December 1987, an integrated package that included a relocatable fast loader with autoboot generation capability.
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decoding proved to be the bottleneck, and modern loaders all carry their own optimized routines for such.
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on the VIC-20. The serial bus was intended to be nearly as fast as its predecessor, due to the use of the
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Some companies created software to bypass protection schemes, including Speedlock, for the purpose of
809: 369: 772: 767:, as, by the time it was written, the Commodore market in the United States had mostly switched to 438:. Moreover, this transfer method allowed two bits to be sent simultaneously, one over the standard 373: 1363: 1613: 507:
were also common additions. Some fast loader cartridges were very sophisticated, incorporating a
395: 553: 523: 670:. The PET Rabbit was one such program for the PET, while TurboTape was one for the Commodore 660: 648: 530: 457: 384: 343: 331: 62: 1517: 830:
which had animated sprites of runners as the game loaded and two impressive soundtracks by
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also published several other utilities that speed up C64-to-1541 communications, including
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was perhaps the most successful of this genre. A few commercial fast loaders, most notably
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disk drives soon gained a reputation for extreme slowness. Only at the introduction of the
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routines were hastily rewritten to transfer a single bit at a time, using a slow software
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was a very visible example of this. U.S. Gold releases became infamous for playing the
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Soon after the C64's release, some astute programmers realized that Commodore's
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version was also included for those C128 users who still had 1541 disk drives.
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was granted in February 1998 and assigned to Namco despite the Invade-a-Load
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A emulator screenshot of a program being loaded from disk using a fast loader
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Various software companies released fast loaders for the C64, usually in
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The type-in fast loader fashion continued in the age of the Internet.
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Ltd. invented a variant of the Invade-a-Load technique for use with
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over the main game itself. It mostly appeared in games sold in the
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Martin van der Heide, Martin Kopanske and Tomaz Kac (1997–1999).
1442:"TurboTape / High-Speed Tape Utility For Commodore 64 And VIC-20" 346:'s default routines. This discrepancy was most pronounced on the 609: 431: 659:
The built-in routines for storing and reading data to and from
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published Loader, a machine-language fast-loading software for
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serial KERNAL routines were unnecessarily sluggish. Since the
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Such programs existed for several computers, such as the
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chips, which did not suffer from this bug, the companion
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as their games loaded. Other notable releases included
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Speedlock was a software protection system used on the
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during loading. With modern loaders the slow rate of
526:, were not cartridge-driven but instead replaced the 703:, amongst others. Speedlock was also ported to the 487:, probably the most popular such cartridge was the 210:. Unsourced material may be challenged and removed. 326:, that accelerates the speed of file loading from 674:. Turbo 2000 was a similar system for the Atari. 621:published TurboDisk for DOS 3.3 in October 1986. 394:Although the C64 replaced the 6522 VIA with two 541:Several popular Commodore magazines published 511:, "freeze" capabilities, and a simple onboard 27:Software acceleration program for file loading 495:was included in most fast loader cartridges. 8: 1390:"Fast Tape Read/Write Programs For Your OSI" 467:, thus intercepting any calls to the KERNAL 812:and showing a character map version of the 71:Learn how and when to remove these messages 711:processor, which made it harder to create 288:Learn how and when to remove this message 270:Learn how and when to remove this message 168:Learn how and when to remove this message 1588:Lerm Tape Utility D (instruction manual) 1533: 1531: 1657:"Tape Decoding : Encoding schemes" 1581: 1579: 1577: 1466:De Ceukelaire, Harrie (February 1985). 1388:Carlson, Edward H. (March–April 1980). 899: 503:, and various convenience commands for 1637: 1626: 1563: 1552: 1440:De Ceukelaire, Harrie (January 1985). 545:fast loading software. In April 1985, 104:Please improve this article by adding 743:, or other proprietary disk systems. 358:series had used an industry-standard 7: 208:adding citations to reliable sources 1659:. World of Spectrum. Archived from 1414:Strasma, James (March–April 1980). 888:Commodore 64 disk / tape emulation 25: 1312:"Fast Loading with Apple DOS 3.3" 771:media. The loader was written by 434:, rather than at each individual 52:This article has multiple issues. 1310:Williams, John (November 1983). 184: 82: 41: 30:For the firearms accessory, see 1370:from the original on 2017-03-21 1336:Ellerbrock, R. (October 1986). 1154:Rozenberg, Bert (August 1986). 585:(a 4-minute full-disk copier), 195:needs additional citations for 60:or discuss these issues on the 1616:(61pages=66–67). Your Sinclair 1614:"How To Hack : Speedlock" 1232:Voosen, William (April 1987). 1: 1362:Åkesson, Linus (2013-03-31). 872:. The technique was used for 106:secondary or tertiary sources 1284:Zaky, Adib (December 1988). 1258:Zaky, Adib (December 1988). 1206:Cutrone, A.M. (April 1986). 1180:Cutrone, A.M. (April 1986). 1128:Bavaro, Dino (August 1986). 1013:. January 1986. p. 120. 800:Revenge of the Mutant Camels 797:where Jeff Minter's classic 314:is a software program for a 850:In 1995, Yoichi Hayashi of 783:for the Mastertronic title 365:, this was replaced with a 1765: 1712:Newsfield Publications Ltd 1102:Lewis, Don (August 1986). 1076:Lewis, Don (August 1986). 1050:Lewis, Don (August 1986). 1024:Lewis, Don (August 1986). 862:and applied for a patent. 806:Daley Thompson's Decathlon 753:(in this case, a clone of 699:and for several titles by 692:Daley Thompson's Decathlon 668:Ohio Scientific Challenger 29: 1499:. March 1985. p. 146 1364:"GCR decoding on the fly" 907:Brain, Jim (1996-01-10). 834:, including a version of 497:Machine language monitors 1682:"CRASH review from 1985" 980:Lewis, Don (July 1985). 954:Lewis, Don (July 1985). 928:Lewis, Don (July 1985). 858:based platforms such as 1338:"TurboDisk For DOS 3.3" 617:3.3, in November 1983. 593:(another fast loader). 517:The Final Cartridge III 1636:Cite journal requires 1562:Cite journal requires 1538:Eddy, Richard (1987). 701:Ultimate Play the Game 656: 442:line and one over the 307: 93:relies excessively on 1739:Commodore 64 software 1468:"How TurboTape Works" 1130:"TurboDisk Relocator" 865:U.S. patent 5,718,632 786:One Man and His Droid 651: 305: 1744:ZX Spectrum software 810:U.S. National Anthem 354:. While the earlier 204:improve this article 1612:North, Jon (1990). 735:or transferring to 713:illegitimate copies 601:Magazine published 1710:. United Kingdom: 1396:. pp. 115–117 1318:. pp. 502–504 1290:COMPUTE!'s Gazette 1264:COMPUTE!'s Gazette 1238:COMPUTE!'s Gazette 1212:COMPUTE!'s Gazette 1186:COMPUTE!'s Gazette 1160:COMPUTE!'s Gazette 1134:COMPUTE!'s Gazette 1108:COMPUTE!'s Gazette 1082:COMPUTE!'s Gazette 1056:COMPUTE!'s Gazette 1030:COMPUTE!'s Gazette 986:COMPUTE!'s Gazette 960:COMPUTE!'s Gazette 934:COMPUTE!'s Gazette 657: 579:COMPUTE!'s Gazette 560:Compute!'s Gazette 308: 1156:"Turbo BootMaker" 1011:Compute's Gazette 814:Stars and Stripes 415:computer and the 298: 297: 290: 280: 279: 272: 254: 178: 177: 170: 152: 75: 16:(Redirected from 1756: 1723: 1722: 1720: 1719: 1698: 1692: 1691: 1689: 1688: 1678: 1672: 1671: 1669: 1668: 1652: 1646: 1645: 1639: 1634: 1632: 1624: 1622: 1621: 1609: 1603: 1602: 1600: 1599: 1593: 1583: 1572: 1571: 1565: 1560: 1558: 1550: 1548: 1547: 1535: 1526: 1525: 1514: 1508: 1507: 1505: 1504: 1489: 1483: 1482: 1480: 1479: 1463: 1457: 1456: 1454: 1453: 1437: 1431: 1430: 1428: 1427: 1416:"The PET Rabbit" 1411: 1405: 1404: 1402: 1401: 1385: 1379: 1378: 1376: 1375: 1359: 1353: 1352: 1350: 1349: 1333: 1327: 1326: 1324: 1323: 1307: 1301: 1300: 1298: 1297: 1281: 1275: 1274: 1272: 1271: 1255: 1249: 1248: 1246: 1245: 1229: 1223: 1222: 1220: 1219: 1203: 1197: 1196: 1194: 1193: 1177: 1171: 1170: 1168: 1167: 1151: 1145: 1144: 1142: 1141: 1125: 1119: 1118: 1116: 1115: 1099: 1093: 1092: 1090: 1089: 1073: 1067: 1066: 1064: 1063: 1047: 1041: 1040: 1038: 1037: 1021: 1015: 1014: 1003: 997: 996: 994: 993: 977: 971: 970: 968: 967: 951: 945: 944: 942: 941: 925: 919: 918: 916: 915: 904: 867: 840:Chariots of Fire 661:Compact Cassette 470: 466: 456: 445: 441: 367:custom Commodore 344:operating system 332:compact cassette 293: 286: 275: 268: 264: 261: 255: 253: 212: 188: 180: 173: 166: 162: 159: 153: 151: 110: 86: 78: 67: 45: 44: 37: 21: 1764: 1763: 1759: 1758: 1757: 1755: 1754: 1753: 1749:Copy protection 1729: 1728: 1727: 1726: 1717: 1715: 1700: 1699: 1695: 1686: 1684: 1680: 1679: 1675: 1666: 1664: 1654: 1653: 1649: 1635: 1625: 1619: 1617: 1611: 1610: 1606: 1597: 1595: 1591: 1585: 1584: 1575: 1561: 1551: 1545: 1543: 1540:"The One David" 1537: 1536: 1529: 1516: 1515: 1511: 1502: 1500: 1491: 1490: 1486: 1477: 1475: 1465: 1464: 1460: 1451: 1449: 1439: 1438: 1434: 1425: 1423: 1413: 1412: 1408: 1399: 1397: 1387: 1386: 1382: 1373: 1371: 1361: 1360: 1356: 1347: 1345: 1335: 1334: 1330: 1321: 1319: 1309: 1308: 1304: 1295: 1293: 1283: 1282: 1278: 1269: 1267: 1257: 1256: 1252: 1243: 1241: 1231: 1230: 1226: 1217: 1215: 1205: 1204: 1200: 1191: 1189: 1179: 1178: 1174: 1165: 1163: 1153: 1152: 1148: 1139: 1137: 1127: 1126: 1122: 1113: 1111: 1104:"TurboDisk 128" 1101: 1100: 1096: 1087: 1085: 1078:"TurboDisk 128" 1075: 1074: 1070: 1061: 1059: 1049: 1048: 1044: 1035: 1033: 1023: 1022: 1018: 1005: 1004: 1000: 991: 989: 979: 978: 974: 965: 963: 953: 952: 948: 939: 937: 927: 926: 922: 913: 911: 906: 905: 901: 896: 884: 863: 848: 646: 505:Commodore BASIC 468: 461: 454: 443: 439: 340: 294: 283: 282: 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773:Richard Aplin 770: 766: 762: 761:Invade-a-Load 758: 757: 752: 748: 747:Invade-a-Load 744: 742: 738: 737:ZX Microdrive 734: 729: 727: 726: 721: 720: 714: 710: 706: 702: 698: 694: 693: 688: 684: 680: 675: 673: 669: 664: 662: 654: 653:Invade-a-Load 650: 643: 641: 639: 635: 631: 627: 622: 620: 616: 612: 611: 606: 604: 600: 599: 594: 592: 588: 584: 580: 576: 574: 573:Commodore 128 570: 564: 562: 561: 556: 555: 550: 549: 544: 539: 535: 532: 529: 525: 522: 518: 514: 510: 506: 502: 498: 494: 490: 489:Epyx FastLoad 486: 485:United States 483:form. In the 482: 477: 473: 464: 459: 452: 451:graphics chip 449: 437: 433: 429: 425: 420: 418: 414: 413:Commodore 128 410: 406: 401: 397: 392: 390: 386: 383: 379: 375: 371: 368: 364: 361: 357: 356:Commodore PET 353: 349: 345: 337: 335: 333: 329: 325: 321: 317: 316:home computer 313: 304: 300: 292: 289: 274: 271: 263: 252: 249: 245: 242: 238: 235: 231: 228: 224: 221: –  220: 219:"Fast loader" 216: 215:Find sources: 209: 205: 199: 198: 193:This article 191: 187: 182: 181: 172: 169: 161: 150: 147: 143: 140: 136: 133: 129: 126: 122: 119: –  118: 117:"Fast loader" 114: 113:Find sources: 107: 101: 100: 96: 91:This article 89: 85: 80: 79: 74: 72: 65: 64: 59: 58: 53: 48: 39: 38: 33: 19: 18:Invade-a-Load 1716:. Retrieved 1714:. March 1991 1705: 1696: 1685:. Retrieved 1676: 1665:. Retrieved 1661:the original 1650: 1629:cite journal 1618:. Retrieved 1607: 1596:. Retrieved 1594:. Lerm. 1990 1587: 1555:cite journal 1544:. Retrieved 1521: 1518:"Turbo 2000" 1512: 1501:. Retrieved 1496: 1487: 1476:. 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Index

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verification
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