CydandClaude Fable 5
db7745fcd0
Un-ignored: the dev drive is the ground truth the restoration and emulator work constantly reference (DPL3/LIBDPL + VRENDER i860 renderer source, BT/RP live+dev game trees, VGL_LABS pod boot, scene/audio content). Kept in-repo for the pod-owner community. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
92 lines
3.5 KiB
Plaintext
92 lines
3.5 KiB
Plaintext
This information was accidentally left out of the documention for
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using the net14 driver. The net14 driver is a shell which installs
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inself to manage the interrupt 14h for serial communications and
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re-direct int 14h reads and writes to/from the ethernet network.
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It then starts up another program which uses the int 14h interface
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with the following programming interface:
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Int 14h Function 00H: Initialize communications
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Call With:
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AH = 00H
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AL = Ignored (serial communication programs use this for
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additional communication parameters, which are un-used
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in the net14 driver).
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DX = Comm. port number to initialize
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Returns:
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AH is returned with the port status:
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Bit: Meaning (if set):
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---- -----------------
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7 Timed-out
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6 Transmit shift register empty
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5 Transmit holding register empty
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4 Break detected
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3 Framing error detected
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2 Parity error detected
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1 Overrun error detected
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0 Receive data ready
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AL has the modem status:
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Bit: Meaning (if set):
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---- -----------------
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7 Receive line signal detect
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6 Ring indicator
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5 Data-set-ready
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4 Clear-to-send
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3 Change in receive line signal detect
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2 Trailing edge ring indicator
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1 Change in data-set-ready status
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0 Change in clear-to-send status
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Int 14h Function 01H: Send Character
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Call With:
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AH = 01H
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AL = Character
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DX = Comm. port to send through
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Returns:
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Bit 7 of AH is zero if successful, otherwise Bit 7 of AH is one.
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Int 14h Function 02H: Receive Character
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Call With:
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AH = 02H
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DX = Comm. port to receive from
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Returns:
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Bit 7 of AH is zero if successful, otherwise Bit 7 of AH is one.
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Character read is in AL if the call was successful.
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Int 14h Function 03H: Get Comm. Port Status
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Call With:
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AH = 03H
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DX = Comm. port to get status of
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Returns:
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AH is returned with the port status, and AL has the modem status.
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(See function 00H above)
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Notes:
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In order to establish a connection, the following steps must be
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followed in order:
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1. Call function 00H with the port to initialize.
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2. Send the following sequence to the port: one ascii 02 code
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(control-B), the name of the machine to connect to (or its
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IP address) one character at a time, and the ascii 03 code
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(control-C).
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Following a connection being established, the net14 driver
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will ignore any control-C's and control-B's in the data stream
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send or received. A connection can be closed by re-initializing
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the comm. port (function 00H).
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So, to use net14 with another application, first verify that the other
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application uses interrupt 14 to write to the communications port.
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In Kermit, for instance, this is done with "set port bios1". If the
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application is using interrupt 14 to access the port, it will have
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initialized it for you. Now send the ^Bhostname^C sequence out.
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Once again, in kermit this is done by going to connect mode with
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"connect" and then typing ^Bhostname^C. Net14 will deinstall itself
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and close all connections when you exit the application.
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