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Expose JT entry point for restoring system state
This commit is contained in:
Joshua Bell
parent
4763b829aa
commit
10d84c1e11
4
APIs.md
4
APIs.md
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@ -129,6 +129,10 @@ Restore from overlay routine
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Set DHR color or monochrome mode, respectively. DHR monochrome mode is supported natively on the Apple IIgs, and via the AppleColor card and Le Chat Mauve, and is used by default by DeskTop. Desk Accessories that display images or exit DeskTop can can toggle the mode.
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#### `JUMP_TABLE_RESTORE_SYS` ($4048) *
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Used when exiting DeskTop; exit DHR mode, restores DHR mode to color, restores detached devices and reformats /RAM if needed, and banks in ROM and main ZP.
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<!-- ============================================================ -->
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## DeskTop API
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@ -54,29 +54,8 @@ start:
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lda #$FE ; "BASIC.SYSTEM not found"
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bne fail
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;; Restore devices DeskTop may have removed
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: jsr restore_device_list
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jsr JUMP_TABLE_COLOR_MODE
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;; Restore to normal state
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sta ALTZPOFF
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lda ROMIN2
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jsr SETVID
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jsr SETKBD
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jsr INIT
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jsr HOME
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sta TXTSET
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sta LOWSCR
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sta LORES
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sta MIXCLR
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sta DHIRESOFF
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sta CLRALTCHAR
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sta CLR80VID
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sta CLR80COL
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;; Reformat /RAM if it was restored
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jsr maybe_reformat_ram
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;; Restore system state: devices, /RAM, ROM/ZP banks.
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: jsr JUMP_TABLE_RESTORE_SYS
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;; Load BS
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MLI_CALL OPEN, open_params
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@ -225,46 +204,3 @@ fail: return #1
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lda LCBANK1
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rts
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.endproc
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;;; ============================================================
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.proc restore_device_list
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ldx devlst_backup
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inx
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: copy devlst_backup,x, DEVLST-1,x
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dex
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bpl :-
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rts
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.endproc
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;;; ============================================================
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.proc maybe_reformat_ram
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ram_unit_number = (1<<7 | 3<<4 | DT_RAM)
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;; Search DEVLST to see if S3D2 RAM was restored
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ldx DEVCNT
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: lda DEVLST,x
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cmp #ram_unit_number
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beq format
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dex
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bpl :-
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rts
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;; NOTE: Assumes driver (in DEVADR) was not modified
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;; when detached.
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;; /RAM FORMAT call; see ProDOS 8 TRM 5.2.2.4 for details
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format: copy #DRIVER_COMMAND_FORMAT, DRIVER_COMMAND
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copy #ram_unit_number, DRIVER_UNIT_NUMBER
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copy16 #$2000, DRIVER_BUFFER
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lda LCBANK1
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lda LCBANK1
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jsr driver
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sta ROMIN2
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rts
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RAMSLOT := DEVADR + $16 ; Slot 3, Drive 2
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driver: jmp (RAMSLOT)
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.endproc
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@ -63,6 +63,7 @@ JUMP_TABLE_CUR_WATCH := $403C ; Changes mouse cursor to watch
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JUMP_TABLE_RESTORE_OVL := $403F ; Restore from overlay routine
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JUMP_TABLE_COLOR_MODE := $4042 ; Set DHR color mode (IIgs, AppleColor, Le Chat Mauve) *
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JUMP_TABLE_MONO_MODE := $4045 ; Set DHR mono mode (IIgs, AppleColor, Le Chat Mauve) *
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JUMP_TABLE_RESTORE_SYS := $4048 ; Exit DHR, restore devices and /RAM, bank in ROM and ZP. *
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;;; ============================================================
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;;; Error codes used for alerts which are not ProDOS errors
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@ -167,10 +168,6 @@ path_table := $DFB3 ; window address table
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selected_file_list := $DF22 ; indexes of selected file (global, not w/in window, up to 127)
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file_table := $DD9F ; file address table
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;;; Copy of DEVLST before DeskTop modifies it. Used when exiting or
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;;; invoking to restore devices.
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devlst_backup := $E196
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last_menu_click_params := $E25A
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;;; Icon (file/volume) entries - length 27 bytes, maximum of 127
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@ -65,9 +65,10 @@ JT_CUR_WATCH: jmp set_watch_cursor
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JT_RESTORE_OVL: jmp restore_dynamic_routine
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JT_COLOR_MODE: jmp set_color_mode ; *
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JT_MONO_MODE: jmp set_mono_mode ; *
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JT_RESTORE_SYS: jmp restore_system ; *
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.assert JUMP_TABLE_MAIN_LOOP = JT_MAIN_LOOP, error, "Jump table mismatch"
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.assert JUMP_TABLE_MONO_MODE = JT_MONO_MODE, error, "Jump table mismatch"
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.assert JUMP_TABLE_RESTORE_SYS = JT_RESTORE_SYS, error, "Jump table mismatch"
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;; Main Loop
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.proc enter_main_loop
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@ -2158,11 +2159,8 @@ start:
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MLI_RELAY_CALL READ, read_params
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MLI_RELAY_CALL CLOSE, close_params
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;; Restore devices, stack, graphics, and /RAM
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jsr restore_device_list
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sta ALTZPOFF
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jsr exit_dhr_mode ; sets ROMIN2
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jsr maybe_reformat_ram
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;; Restore system state: devices, /RAM, ROM/ZP banks.
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jsr restore_system
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quit: jmp quit_code_addr
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@ -2172,6 +2170,45 @@ fail: jsr ShowAlert
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.endproc
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cmd_quit := cmd_quit_impl::start
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;;; ============================================================
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;;; Exit DHR, restore device list, reformat /RAM.
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;;; Returns with ALTZPOFF and ROM banked in.
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.proc restore_system
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jsr restore_device_list
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;; Switch back to main ZP, preserving return address.
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pla
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tax
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pla
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sta ALTZPOFF
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pha
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txa
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pha
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;; Switch back to color DHR mode
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jsr set_color_mode
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;; Exit graphics mode entirely
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lda ROMIN2
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jsr SETVID
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jsr SETKBD
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jsr INIT
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jsr HOME
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sta TXTSET
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sta LOWSCR
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sta LORES
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sta MIXCLR
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sta DHIRESOFF
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sta CLRALTCHAR
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sta CLR80VID
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sta CLR80COL
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;; Restore /RAM if possible.
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jmp maybe_reformat_ram
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.endproc
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;;; ============================================================
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.proc cmd_view_by_icon
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@ -3525,12 +3562,8 @@ check_drive_flags:
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;; also invoked by launcher code
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.proc reset_and_invoke
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;; Restore devices, stack, graphics, and /RAM
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jsr restore_device_list
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sta ALTZPOFF
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jsr exit_dhr_mode ; sets ROMIN2
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jsr maybe_reformat_ram
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;; Restore system state: devices, /RAM, ROM/ZP banks.
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jsr restore_system
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;; also used by launcher code
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target := *+1
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@ -3538,12 +3571,6 @@ check_drive_flags:
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.endproc
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reset_and_invoke_target := reset_and_invoke::target
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;;; ============================================================
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.proc restore_state_for_exit
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.endproc
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;;; ============================================================
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active_window_view_by:
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@ -9366,30 +9393,6 @@ open: MLI_RELAY_CALL OPEN, open_params
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done: rts
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.endproc
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;;; ============================================================
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;;; Invoked when exiting or launching another program.
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.proc exit_dhr_mode
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jsr set_color_mode
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lda ROMIN2
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jsr SETVID
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jsr SETKBD
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jsr INIT
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jsr HOME
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sta TXTSET
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sta LOWSCR
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sta LORES
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sta MIXCLR
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sta DHIRESOFF
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sta CLRALTCHAR
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sta CLR80VID
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sta CLR80COL
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rts
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.endproc
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.proc set_color_mode
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;; AppleColor Card - Mode 2 (Color 140x192)
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sta SET80VID
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@ -950,10 +950,9 @@ entries_read_this_block:
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;;; ============================================================
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;; Backup copy of DEVLST made before detaching ramdisk
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devlst_backup_:
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.assert * = devlst_backup, error, "Entry point mismatch"
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.res 10, 0
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;;; Backup copy of DEVLST made before detaching ramdisk
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devlst_backup:
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.res 14, 0
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;; index is device number (in DEVLST), value is icon number
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device_to_icon_map:
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