mirror of
https://github.com/a2stuff/prodos-drivers.git
synced 2024-12-21 14:29:18 +00:00
Pull out system reset logic
This commit is contained in:
Joshua Bell
parent
e65fdfe1b5
commit
fbddc217a6
126
cricket.system.s
126
cricket.system.s
@ -72,7 +72,8 @@ load: lda src,y ; self-modified
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;;; ============================================================
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.proc main
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jsr setup
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jsr save_chain_info
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jsr init_system
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jsr maybe_install_driver
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jsr launch_next
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brk
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@ -82,7 +83,7 @@ load: lda src,y ; self-modified
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;;; Preserve state needed to chain to next file
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;;; ============================================================
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.proc setup
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.proc save_chain_info
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;; --------------------------------------------------
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;; Save most recent device for later, when chaining
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;; to next .SYSTEM file.
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@ -132,16 +133,60 @@ devnum: .byte 0
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self_name: .res 16
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;;; ============================================================
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;;; Find and invoke the next .SYSTEM file
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;;; Init system state
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;;; ============================================================
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.proc quit
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MLI_CALL QUIT, quit_params
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brk ; crash if QUIT fails
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;;; Before installing, get the system to a known state.
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DEFINE_QUIT_PARAMS quit_params
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.proc init_system
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cld
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bit ROMIN2
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;; Update reset vector - ProDOS QUIT
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lda #<quit
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sta $03F2
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lda #>quit
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sta $03F3
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eor #$A5
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sta $03F4
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;; Quit 80-column firmware
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lda #$95 ; Ctrl+U (quit 80 col firmware)
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jsr COUT
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;; Reset I/O
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sta CLR80VID
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sta CLRALTCHAR
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jsr SETVID
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jsr SETKBD
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jsr SETNORM
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jsr INIT
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jsr HOME
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;; Update System Bit Map
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ldx #BITMAP_SIZE-1
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lda #%00000001 ; protect page $BF
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: sta BITMAP,x
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lda #%00000000 ; nothing else protected until...
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dex
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bne :-
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lda #%11001111 ; ZP ($00), stack ($01), text page 1 ($04-$07)
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sta BITMAP
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;; Determine lowercase support
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lda MACHID
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and #$88 ; IIe or IIc (or IIgs) ?
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bne :+
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lda #$DF
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sta lowercase_mask ; lower case to upper case
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: rts
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.endproc
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;;; ============================================================
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;;; Find and invoke the next .SYSTEM file
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;;; ============================================================
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online_buf := $1C00
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io_buf := $1C00
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dir_buf := $2000
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@ -155,14 +200,6 @@ block_len = $200
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.proc launch_next
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;; Update reset vector - now terminates.
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lda #<quit
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sta $03F2
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lda #>quit
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sta $03F3
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eor #$A5
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sta $03F4
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;; Read directory and look for .SYSTEM files; find this
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;; one, and invoke the following one.
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@ -173,10 +210,12 @@ block_len = $200
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;; --------------------------------------------------
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;; Own name found? If not, just quit
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lda self_name
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beq quit
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bne :+
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jmp quit
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;; --------------------------------------------------
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;; Find name of boot device, copy into PATHNAME
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lda devnum
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: lda devnum
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sta on_line_params::unit_num
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MLI_CALL ON_LINE, on_line_params
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bcc :+
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@ -331,6 +370,7 @@ not_found:
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lda open_params::ref_num
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sta read_params::ref_num
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sta close_params::ref_num
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MLI_CALL READ, read_params
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bcs on_error
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@ -364,6 +404,13 @@ not_found:
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jmp quit
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.endproc
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.proc quit
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MLI_CALL QUIT, quit_params
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brk ; crash if QUIT fails
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DEFINE_QUIT_PARAMS quit_params
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.endproc
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;;; ============================================================
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;;; Data
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@ -445,50 +492,10 @@ units: pla
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;;; ============================================================
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;;; ============================================================
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;;; Before installing, get the system to a known state and
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;;; ensure there is not a previous clock driver installed.
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;;; Ensure there is not a previous clock driver installed.
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.proc maybe_install_driver
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cld
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bit ROMIN2
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;; Update reset vector - re-invokes this code.
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lda #<maybe_install_driver
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sta $03F2
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lda #>maybe_install_driver
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sta $03F3
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eor #$A5
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sta $03F4
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;; Quit 80-column firmware
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lda #$95 ; Ctrl+U (quit 80 col firmware)
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jsr COUT
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;; Reset I/O
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sta CLR80VID
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sta CLRALTCHAR
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jsr SETVID
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jsr SETKBD
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jsr SETNORM
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jsr INIT
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;; Update System Bit Map
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ldx #BITMAP_SIZE-1
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lda #%00000001 ; protect page $BF
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: sta BITMAP,x
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lda #%00000000 ; nothing else protected until...
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dex
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bne :-
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lda #%11001111 ; ZP ($00), stack ($01), text page 1 ($04-$07)
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sta BITMAP
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lda MACHID
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and #$88 ; IIe or IIc (or IIgs) ?
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bne :+
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lda #$DF
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sta lowercase_mask ; lower case to upper case
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: lda MACHID
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and #$01 ; existing clock card?
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beq detect_cricket ; nope, check for Cricket
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@ -567,7 +574,6 @@ cricket_not_found:
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not_found:
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;; Show failure message
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jsr HOME
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jsr zstrout
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scrcode "\r\r\r", PRODUCT, " - Not Found."
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.byte 0
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@ -655,8 +661,6 @@ loop: lda driver,y
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jsr DATETIME
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;; Display success message
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bit ROMIN2
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jsr HOME
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jsr zstrout
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scrcode "\r\r\r", PRODUCT, " - Installed "
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.byte 0
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@ -69,7 +69,8 @@ load: lda src,y ; self-modified
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;;; ============================================================
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.proc main
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jsr setup
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jsr save_chain_info
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jsr init_system
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jsr maybe_install_driver
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jsr launch_next
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brk
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@ -79,7 +80,7 @@ load: lda src,y ; self-modified
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;;; Preserve state needed to chain to next file
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;;; ============================================================
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.proc setup
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.proc save_chain_info
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;; --------------------------------------------------
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;; Save most recent device for later, when chaining
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;; to next .SYSTEM file.
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@ -129,16 +130,60 @@ devnum: .byte 0
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self_name: .res 16
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;;; ============================================================
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;;; Find and invoke the next .SYSTEM file
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;;; Init system state
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;;; ============================================================
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.proc quit
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MLI_CALL QUIT, quit_params
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brk ; crash if QUIT fails
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;;; Before installing, get the system to a known state.
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DEFINE_QUIT_PARAMS quit_params
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.proc init_system
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cld
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bit ROMIN2
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;; Update reset vector - ProDOS QUIT
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lda #<quit
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sta $03F2
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lda #>quit
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sta $03F3
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eor #$A5
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sta $03F4
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;; Quit 80-column firmware
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lda #$95 ; Ctrl+U (quit 80 col firmware)
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jsr COUT
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;; Reset I/O
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sta CLR80VID
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sta CLRALTCHAR
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jsr SETVID
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jsr SETKBD
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jsr SETNORM
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jsr INIT
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jsr HOME
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;; Update System Bit Map
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ldx #BITMAP_SIZE-1
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lda #%00000001 ; protect page $BF
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: sta BITMAP,x
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lda #%00000000 ; nothing else protected until...
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dex
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bne :-
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lda #%11001111 ; ZP ($00), stack ($01), text page 1 ($04-$07)
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sta BITMAP
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;; Determine lowercase support
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lda MACHID
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and #$88 ; IIe or IIc (or IIgs) ?
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bne :+
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lda #$DF
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sta lowercase_mask ; lower case to upper case
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: rts
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.endproc
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;;; ============================================================
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;;; Find and invoke the next .SYSTEM file
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;;; ============================================================
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online_buf := $1C00
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io_buf := $1C00
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dir_buf := $2000
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@ -152,14 +197,6 @@ block_len = $200
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.proc launch_next
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;; Update reset vector - now terminates.
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lda #<quit
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sta $03F2
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lda #>quit
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sta $03F3
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eor #$A5
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sta $03F4
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;; Read directory and look for .SYSTEM files; find this
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;; one, and invoke the following one.
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@ -170,10 +207,12 @@ block_len = $200
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;; --------------------------------------------------
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;; Own name found? If not, just quit
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lda self_name
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beq quit
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bne :+
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jmp quit
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;; --------------------------------------------------
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;; Find name of boot device, copy into PATHNAME
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lda devnum
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: lda devnum
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sta on_line_params::unit_num
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MLI_CALL ON_LINE, on_line_params
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bcc :+
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@ -328,6 +367,7 @@ not_found:
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lda open_params::ref_num
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sta read_params::ref_num
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sta close_params::ref_num
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MLI_CALL READ, read_params
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bcs on_error
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@ -361,6 +401,13 @@ not_found:
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jmp quit
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.endproc
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.proc quit
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MLI_CALL QUIT, quit_params
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brk ; crash if QUIT fails
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DEFINE_QUIT_PARAMS quit_params
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.endproc
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;;; ============================================================
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;;; Data
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@ -442,50 +489,10 @@ units: pla
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;;; ============================================================
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;;; ============================================================
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;;; Before installing, get the system to a known state and
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;;; ensure there is not a previous clock driver installed.
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;;; Ensure there is not a previous clock driver installed.
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.proc maybe_install_driver
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cld
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bit ROMIN2
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;; Update reset vector - re-invokes this code.
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lda #<maybe_install_driver
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sta $03F2
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lda #>maybe_install_driver
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sta $03F3
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eor #$A5
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sta $03F4
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;; Quit 80-column firmware
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lda #$95 ; Ctrl+U (quit 80 col firmware)
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jsr COUT
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;; Reset I/O
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sta CLR80VID
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sta CLRALTCHAR
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jsr SETVID
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jsr SETKBD
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jsr SETNORM
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jsr INIT
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;; Update System Bit Map
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ldx #BITMAP_SIZE-1
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lda #%00000001 ; protect page $BF
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: sta BITMAP,x
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lda #%00000000 ; nothing else protected until...
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dex
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bne :-
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lda #%11001111 ; ZP ($00), stack ($01), text page 1 ($04-$07)
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sta BITMAP
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lda MACHID
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and #$88 ; IIe or IIc (or IIgs) ?
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bne :+
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lda #$DF
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sta lowercase_mask ; lower case to upper case
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: lda MACHID
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and #$01 ; existing clock card?
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beq detect_nsc ; nope, check for NSC
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@ -579,7 +586,6 @@ not_found:
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bpl :-
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;; Show failure message
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jsr HOME
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jsr zstrout
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scrcode "\r\r\r", PRODUCT, " - Not Found."
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.byte 0
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@ -629,8 +635,6 @@ loop: lda driver,y
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jsr DATETIME
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;; Display success message
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bit ROMIN2
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jsr HOME
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jsr zstrout
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scrcode "\r\r\r", PRODUCT, " - Installed "
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.byte 0
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