Difference between revisions of "RX50 dual-diskette drive"
From Computer History Wiki
m (Jnc moved page RX50 to RX50 dual-diskette drive: Name used in DEC documentation) |
(DEC order number for RX50 floppy and two more controllers added.) |
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[[Image:rx50.jpg|thumb|left|200px|RX50]] | [[Image:rx50.jpg|thumb|left|200px|RX50]] | ||
| − | The '''RX50 dual-diskette drive''' is a 5.25" full height [[floppy disk]] drive from [[Digital Equipment Corporation|DEC]]. It uses [[Modified Frequency Modulation|MFM]] encoding, and holds 400 KB per | + | The '''RX50 dual-diskette drive''' is a 5.25" full height [[floppy disk]] drive from [[Digital Equipment Corporation|DEC]]. It uses [[Modified Frequency Modulation|MFM]] encoding, and holds 400 KB per floppy. |
It is supported by the following DEC [[QBUS]] MFM disk controllers: | It is supported by the following DEC [[QBUS]] MFM disk controllers: | ||
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* [[RQDX1/RQDX2 MFM Disk & Floppy QBUS Controllers|RQDX2]] | * [[RQDX1/RQDX2 MFM Disk & Floppy QBUS Controllers|RQDX2]] | ||
* [[RQDX3 MFM Disk & Floppy QBUS Controller|RQDX3]] | * [[RQDX3 MFM Disk & Floppy QBUS Controller|RQDX3]] | ||
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| + | There are two controllers for other buses: | ||
| + | |||
| + | * [[RUX50]] for the DEC [[UNIBUS]] | ||
| + | * [[RCX50]] for the DEC [[CTI BUS]] | ||
| + | |||
| + | The DEC order number for RX50 floppies is '''RX50K'''. | ||
==4.3 BSD disktab== | ==4.3 BSD disktab== | ||
Latest revision as of 14:45, 15 September 2023
| RX50 | |
| Manufacturer: | DEC |
|---|---|
| Capacity: | 400 KB (per floppy) |
| Transfer Rate: | 250K bits/sec |
| Average Access Time: | 164 msec |
| Revolutions per Minute: | 300 |
| 1/2 Revolution Time: | 100 msec |
| One Track Seek Time: | 6 msec |
| Total Surfaces: | 1 (2 floppies per RX50) |
| Number of Heads: | 1 (per floppy) |
| Tracks per Surface: | 80 (per floppy) |
| Sectors per Track: | 10 (soft) |
| Bytes per Sector: | 512 |
| Tracks per Inch: | 96 |
| Density: | 5576 flux changes/inch |
| Recording Method: | MFM |
| Start Time: | 500 msec |
| Physical Size: | 3.25" x 5.75" x 8.5" |
| Weight: | 4.8 lb |
| Power Consumption: | 4.2W (idle) 17.5W (active) |
The RX50 dual-diskette drive is a 5.25" full height floppy disk drive from DEC. It uses MFM encoding, and holds 400 KB per floppy.
It is supported by the following DEC QBUS MFM disk controllers:
There are two controllers for other buses:
The DEC order number for RX50 floppies is RX50K.
4.3 BSD disktab
rx50|RX50|DEC RX50:\ :ty=removable:ns#10:nt#1:nc#80:\ :pa#800:ba#4096:fa#512:
External links
- rx50 - documentation at Bitsavers
- Rainbow 100 Technical Manual (EK-PC100-TM-001) - the RX50 is covered in detail here, in Chapter 6 (pp. 218-255 of the PDF)
- Frequently Asked Questions File for RX50 Users
- The RX50 FAQ
- RX50 technology
