Editing Commodore 1570

{{refimprove|date=August 2016}}

{{Infobox information appliance
| name         = Commodore 1570
| title        = 
| image        = Commodore 1570 01.JPG
| caption      = Commodore 1570 floppy drive
| manufacturer = Commodore Business Machines, Inc.
| type         = Floppy drive
| releasedate  = <!--{{Start date|198?||}}-->
| price <!--intro--> = <!--? USD (198?) USD {{Inflation|US|?|198?|fmt=c|r=-2}} ({{CURRENTYEAR}} equivalent)-->
| discontinued = 
| media        = 5¼" [[floppy disk]] [[Floppy disk format#Single Sided, Double Density|SS DD]] using [[Group coded recording|GCR]] or [[Modified Frequency Modulation|MFM]]<ref name=z71>{{cite web |url=https://www.zimmers.net/cbmpics/d1571s.html
|title=Commodore 1571 Disk Drive : Coming up to par
|date=2015-03-20
|website=zimmers.net
|archive-url=https://web.archive.org/web/20160326051411/http://www.zimmers.net/cbmpics/d1571s.html
|archive-date=2016-03-26
|access-date=2016-04-27}}</ref>
| os           = [[Commodore DOS|CBM DOS v3.0]]<ref name=z71/>
| power        = <!--220 V 50 Hz ? W-->
| cpu          = [[MOS Technology 6502|MOS 6502]] @ {{nowrap|1-2 MHz}}<!--clock from es.wikipedia -->, [[Western Digital FD1771|WD1770]]
| memory       = 2 kB RAM 32 kB ROM
| storage      = 170 kB (GCR) ; 200 kB (MFM)<!--de:Commodore 128 says so-->
| connectivity = [[Commodore bus|Commodore proprietary serial IEEE-488]]<!--"Two Serial Ports"--> {{nowrap|5200 bytes/s}}
| dimensions   = 
| weight       = 
| compatibility= {{nowrap|[[Commodore 64]],}} {{nowrap|[[Commodore 128]]}}
| predecessor  = [[Commodore 1541]]
| successor    = [[Commodore 1571]]
| related      = 
}}

The '''Commodore 1570''' is a 5¼" [[floppy disk]] drive for the [[Commodore 128]] [[home computer|home]]/[[personal computer]]. It is a single-sided, 170 kB version of the [[Commodore 1571]], released as a stopgap measure when [[Commodore International]] was unable to provide sufficient quantities of 1571s due to a shortage of double-sided drive mechanisms (which were supplied by an outside manufacturer). Like the 1571, it can read and write both [[Group Coded Recording|GCR]] and [[Modified Frequency Modulation|MFM]] disk formats.
The 1570 utilizes a 1571 logic board in a cream-colored [[Commodore 1541|original-1541]]-like case with a drive mechanism similar to the 1541's except that it was equipped with track-zero detection. Like the 1571, its built-in DOS provides a data burst mode for transferring data to the C128 computer at a faster speed than a 1541 can. Its [[Read-only memory|ROM]] also contains some DOS bug fixes that didn't appear in the 1571 until much later. The 1570 can read and write all single-sided [[CP/M operating system|CP/M]]-format disks that the 1571 can access.

Although the 1570 is compatible with the [[Commodore 64]], the C64 isn't capable of taking advantage of the drive's higher-speed operation, and when used with the C64 it is little more than a pricier 1541. Also, many early buyers of the C128 chose to temporarily make do with a 1541 drive, perhaps owned as part of a previous C64 setup, until the 1571 became more widely available.

The drive uses the CPU [[MOS Technology 6502|MOS 6502]], floppy controller [[Western Digital FD1771|WD1770]] or WD1772, I/O controllers 2x [[MOS Technology 6522]] and 1x [[MOS Technology 6526]].

==References==
{{Reflist}}

{{Commodore disk drives}}

[[Category:Commodore 64]]
[[Category:CBM floppy disk drives]]