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Loader: INBAY

[BBC Micro disc version, Flight]

Name: INBAY [Show more] Type: Subroutine Category: Loader Summary: Load and run the main docked code in T.CODE
Context: See this subroutine in context in the source code References: This subroutine is called as follows: * DEATH2 calls INBAY
.INBAY LDX #LO(LTLI) \ Set (Y X) to point to LTLI ("L.T.CODE", which gets LDY #HI(LTLI) \ modified to "R.T.CODE" in the DOENTRY routine) JSR OSCLI \ Call OSCLI to run the OS command in LTLI, which *RUNs \ the main docked code in T.CODE \ \ Note that this is a JSR rather than a JMP, so if LTLI \ is still set to "L.T.CODE" (rather than "R.T.CODE"), \ then once the command has been run and the docked code \ has loaded, execution will continue from the next \ instruction \ \ By this point the T.CODE binary has loaded over the \ top of this one, so we don't fall through into the \ LTLI variable (as that's in the flight code), but \ instead we fall through into the DOBEGIN routine in \ the docked code) \ \ This means that if the LTLI command is unchanged, then \ we load the docked code and fall through into DOBEGIN \ to restart the game from the title screen, so by \ default, loading the docked code will restart the game \ \ However if we call DOENTRY in the flight code first, \ then the command in LTLI is changed to the "R.T.CODE" \ version, which *RUNs the docked code and starts \ execution from the start of the docked binary at S%, \ which contains a JMP DOENTRY instruction that docks at \ the station instead