41CL User Manual
© 2019, Systemyde International Corporation
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UPLUG1U
UPLUG2U
UPLUG3U
UPLUG4U
UPLUGH
The
UPLUG1U
(
Unplug from Port 1 upper half
) function is identical to the
UPLUG1
function except that it only operates on the upper half of Port 1 (Page 9 of the logical
address space). Be careful using this function if you are planning on plugging a physical
module into Port 1, because the lower half of the Port will still be fetched from internal
memory.
The
UPLUG2U
(
Unplug From Port 2 Upper Half
) function operates on the upper half of
Port 2 (Page B).
The
UPLUG3U
(
Unplug From Port 3 Upper Half
) function operates on the upper half of
Port 3 (Page D).
The
UPLUG4U
(
Unplug From Port 4 Upper Half
) function operates on the upper half of
Port 4 (Page F).
The
UPLUGH
(
Unplug From HP-IL Page
) function operates on Page 7.
Memory Block Functions
The memory block functions allow the user to manipulate pages (4K blocks) of memory.
In particular, a page can be initialized to a user-selected value or copied to another loca-
tion in memory. Neither of these functions check whether the blocks are in Flash memory
or RAM, and if you attempt to write to Flash memory the operation will appear to pro-
ceed, without any writes occurring.
Given that they are operating on 4096 memory locations, the 41CL is automatically
switched to the 50x Turbo mode during the transfer. The current Turbo mode is restored
after the transfer is complete.
YMCLR
(address and data in ALPHA register)
Executing
YMCLR
(
Clear Memory Block
) writes the contents of the data field to an
