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Filename Latest commit message Latest commit date
Jeff Parsons cacc2f7dad Support for RX11 diskette drives has been added, but is still untested
2017-02-02 15:14:13 -08:00
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default.xml Numerous changes to make paper tape configurations more consistent with disk configurations. This allows all devices to share the machine-wide "autoMount" configuration object, now that the PC11 has a proper device name ("PTR"), making its properties distinguishable from those for RK11 and RL11 drives (eg, "RK0", "RL0", etc). And all the tape/disk components now use "Load" functions to connect a tape or disk to a device ("Attach" is deprecated). And finally, all tape/disk components now support operations to deposit their media directly into memory -- although in this case, the names of the operations are necessarily different: "Read" for tape images, "Boot" for disk images. The difference is partly historical convention but also reflects the fact that a "Boot" operation is more limited: paper tapes were designed to be completely loaded into memory, whereas bootable disks are designed for only the first sector to be loaded and executed. Also, paper tape images are now flagged as non-auto-starting, because they often require some user action (eg, loading another tape, setting some switches, etc), whereas disk boot sectors are flagged as auto-starting (see the fStart parameter of the loadImage() interface in the RAM component). 2016-12-03 14:49:51 -08:00
README.md Support for RX11 diskette drives has been added, but is still untested 2017-02-02 15:14:13 -08:00

README.md

layout title permalink
page RL11 Disk Controller /devices/pdp11/rl11/

RL11 Disk Controller

The RL11 Disk Controller controls up to four RL01 or RL02 disk drives, which in turn read/write RL01K or RL02K disk cartridges, respectively.

RL01K disks are single-platter cartridges with 256 tracks per side, 40 sectors per track, and a sector size of 256 bytes, for a total capacity of 5Mb (5,242,880 bytes).

RL02K disks are single-platter cartridges with 512 tracks per side, 40 sectors per track, and a sector size of 256 bytes, for a total capacity of 10Mb (10,485,760 bytes).

Machines containing the RL11 Component include:

PCjs has archived a selection of RL01K and RL02K disk images from Paul Nankervis for use by those machines, which are also listed in the following RL11 Device XML file:

which is typically referenced by a Machine XML file as:

<device ref="/devices/pdp11/rl11/default.xml"/>

Device XML files not only configure a device, but also list all the resource the device will use, and define UI elements used to control the device, such as choosing which disks should be "auto-mounted" by the RL11 device. For example:

<?xml version="1.0" encoding="UTF-8"?>
<device id="rl11" type="rl11" autoMount='{RL0:{path:"http://archive.pcjs.org/disks/dec/rl02k/RL02K-XXDP.json"}}' pos="left" width="35%" padLeft="8px" padBottom="8px">
    <name>Disk Drive Controls</name>
    <control type="container">
        <control type="list" binding="listDrives"/>
        <control type="list" binding="listDisks">
            <disk id="disk01" name="XXDP+ Diagnostics" path="http://archive.pcjs.org/disks/dec/rl02k/RL02K-XXDP.json"/>
        </control>
        <control type="button" binding="loadDisk">Load</control>
        <control type="button" binding="bootDisk">Boot</control>
        <control type="description" binding="descDisk" padRight="8px"/>
        <control type="file" binding="mountDisk"/>
    </control>
</device>