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noted the SD-2's incompatibilities with some 1541 software, but concluded that "serious users of the
Commodore 64 will easily be able to justify the $ 695 price tag. The time savings alone, when backing up disk files, will rapidly pay for the machine", and also a good replacement for the CBM 4040.
290:
Magazine wrote that the MSD SD-2 was "built like a tank and can run 24 hours a day for weeks". And while program loading and saving was no faster than on the 1541 when using the serial interface due to that interface's limitations, both the SD-1 and SD-2 were several times faster when connected to
326:
command can also be used to copy files from one drive to another on the MSD SD-2, a feature not available with two 1541 drives. However, the MSD Super Disk drives have difficulty loading most copy-protected software, due to substantial differences in the DOS code, memory mapping and the
295:
interface. MSD Systems also offered the VIE and CIE IEEE-488 interface for the VIC-20 and
Commodore 64, respectively. Furthermore, a blank disk could be formatted in only 18 seconds on the MSD Super Disk series, compared to 1 minute and 22 seconds on the 1541.
307:
of internal RAM, it allows entire disks to be copied in less than 2 minutes. It is still unable to read and write an entire track of data (over 7kB) in a single rotation of the media, which would be optimal. It does have an empty
275:
Magazine lists the MSD SD-1 single drive at $ 249.95, compared to $ 199.95 for the
Commodore 1541. The SD-2 was listed at $ 449.95, much less than the comparable Commodore PET dual drive (
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How Much Is That in Real Money? A Historical Price Index for Use as a
Deflator of Money Values in the Economy of the United States: Addenda et Corrigenda
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543:
651:
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The MSD SD-1 was more expensive than the
Commodore 1541. For instance, a typical mail-order advertisement in the January 1985 issue of
528:
How Much Is That in Real Money? A Historical Price Index for Use as a
Deflator of Money Values in the Economy of the United States
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brand (model FB-501) floppy drive mechanisms. The electronics on the mechanisms are modified by MSD to be compatible with the
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941:
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347:
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279:) which sold for $ 699. To justify the typically $ 50 or so (equivalent to $ 142 in 2023) higher price of the MSD
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Introduced in 1983, the MSD Super Disk drives were the first third-party devices designed for compatibility with the
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Duplicate command from the older
Commodore PET dual drive series. Because the SD-2 has paired drive units and 6
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433:
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93:
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351:
156:
98:
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pad available to add a 4th 2kB chip. A third-party hardware & software add-on (Chip Level
Designs'
316:) was produced to add the extra RAM and allow for full-track-per-rotation 22-second disk duplication.
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117:
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disk drive. produced by Micro
Systems Development (Dallas, Texas; later MSD Systems) for use with
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single drive over the
Commodore 1541, MSD claimed to offer several advantages over the 1541.
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Video: Demonstration of MSD-SD2 Super Disk Drive with Mass Duplicator Upgrade (Sep 7, 2016)
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recording format used by all Commodore floppy disk drives at that time (the
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249:. Therefore, they can be connected to any Commodore 8-bit system, from the
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16:"Super Disk Drive" redirects here. For the Laser-servo disk drives, see
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recording format). The main control board utilizes a 1 MHz
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448:"REPAIRS TO THE MSD SD-1 (SINGLE) AND SD-2 (DUAL) DISK DRIVE"
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286:In an August 1985 review of 1541 replacements,
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627:The Peripheral Connection: Enhancing Your 64
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204:drives compatible to some degree with the
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622:MSD SD-2 operating manual and schematics
544:"Consumer Price Index (estimate) 1800–"
381:
150:Commodore serial IEEE-488 bus (IEC Bus)
973:Commodore 64 peripheral manufacturers
542:Federal Reserve Bank of Minneapolis.
7:
899:
897:
35:The MSD SD-2 dual floppy disk drive
921:. You can help Knowledge (XXG) by
342:hard disks and the later produced
14:
901:
434:"cbm/firmware/drives/other/msd/"
330:Internally, both models feature
392:Kevelson, Morton (July 1984).
1:
605:"MSD Mass Duplicator manual"
588:. January 1985. p. 26.
568:. January 1985. p. 28.
536:American Antiquarian Society
516:American Antiquarian Society
485:. August 1983. p. 311.
465:. January 1985. p. 91.
299:The MSD SD-2 implements the
222:; and the dual-drive model,
173:, 4000-series, 8000-series,
994:
896:
15:
394:"The MSD Dual Disk Drive"
245:and the custom Commodore
200:were a series of 5¼-inch
44:Micro Systems Development
28:
346:3½-inch drive used the
968:CBM floppy disk drives
917:-related article is a
352:Rockwell International
327:microcontroller used.
99:Rockwell International
291:the computer via the
667:Storage devices for
321:Commodore BASIC V4.0
265:Features and pricing
136:brand (model FB-501)
978:Microcomputer stubs
132:170 kB per disk –
84:MSD DOS, partially
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243:parallel interface
120:), 16kB EPROM (2x
57:Introductory price
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52:Floppy disk drive
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540:1800–present:
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198:MSD Super Disk
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116:6 kB SRAM (3x
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923:expanding it
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549:February 29,
547:. Retrieved
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402:. Retrieved
400:. p. 42
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236:Commodore 64
233:
230:Introduction
223:
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197:
195:
164:Commodore 64
141:Connectivity
60:$ 695 (SD-2)
41:Manufacturer
520:1700–1799:
500:1634–1699:
202:floppy disk
88:compatible.
86:CBM DOS 2.6
70:floppy disk
962:Categories
882:Lt. Kernal
878:Hard drive
804:Serial CBM
785:Hard drive
584:" ".
564:" ".
481:" ".
461:" ".
376:References
686:Datasette
669:Commodore
362:Reception
210:Commodore
144:Parallel
18:SuperDisk
845:Indus GT
781:SFD-1001
680:Cassette
525:(1992).
505:(1997).
340:D9060/90
293:IEEE-488
277:CBM 4040
240:IEEE-488
157:Backward
146:IEEE-488
852:3½-inch
811:5¼-inch
742:5¼-inch
674:systems
404:27 June
253:to the
181:Related
129:Storage
861:CMD FD
840:MSD SD
719:8-inch
354:6511Q
187:&
113:Memory
101:6511Q
913:- or
909:This
672:8-bit
532:(PDF)
512:(PDF)
398:Ahoy!
368:Ahoy!
281:SD-1
213:8-bit
107:1 MHz
73:SS SD
65:Media
919:stub
871:SCSI
856:1581
835:1571
830:1570
825:1551
820:1541
815:1540
794:9090
789:9060
776:8250
771:8050
766:4040
761:4031
756:3040
751:2040
746:2031
738:8280
733:8062
728:8061
723:8060
704:Disk
695:1531
690:1530
551:2024
483:Byte
406:2014
344:1581
324:COPY
319:The
259:C128
257:and
224:SD-2
220:SD-1
196:The
189:4040
175:B128
168:C128
122:2764
118:2016
68:5¼"
49:Type
591:RUN
586:RUN
571:RUN
566:RUN
468:RUN
463:RUN
348:MFM
336:GCR
332:TEC
310:PCB
288:RUN
272:RUN
255:C64
134:TEC
94:CPU
964::
534:.
514:.
396:.
384:^
358:.
305:kB
226:.
166:,
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105:@
950:e
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925:.
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450:.
436:.
422:.
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124:)
20:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
