Combine preamble files, .gitignore, and split out ns.clock
This commit is contained in:
Joshua Bell
parent
cd2074c864
commit
0f41276584
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@ -1,3 +1,11 @@
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# Generated files
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*.BIN
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*.SYS
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*.list
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# Reference copy of original binary
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orig
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# Build directory
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out
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2
Makefile
2
Makefile
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@ -1,4 +1,4 @@
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targets := cricket bbb ram.drv
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targets := ns.clock cricket bbb ram.drv
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.PHONY: all $(targets)
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@ -1,3 +0,0 @@
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# Generated files
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*.list
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*.SYS
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@ -48,7 +48,7 @@ ASCII_ESCAPE := $1B
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;;; ************************************************************
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.include "driver_preamble.inc"
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.include "../inc/driver_preamble.inc"
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;;; ************************************************************
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;;; ------------------------------------------------------------
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@ -702,5 +702,5 @@ cout: jmp COUT
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poporg
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;;; ************************************************************
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.include "driver_postamble.inc"
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.include "../inc/driver_postamble.inc"
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;;; ************************************************************
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@ -1,10 +0,0 @@
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# Reference copy of original binary
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orig
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# Output directory
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out
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# Output files
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*.SYS
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*.BIN
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*.list
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@ -8,7 +8,6 @@ HEADERS = $(wildcard *.inc) $(wildcard ../inc/*.inc)
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TARGETS = \
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$(OUTDIR)/prodos.mod.BIN \
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$(OUTDIR)/ns.clock.system.SYS \
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$(OUTDIR)/cricket.system.SYS \
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$(OUTDIR)/test.BIN \
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$(OUTDIR)/date.BIN \
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@ -32,7 +32,7 @@ Requires [cc65](https://github.com/cc65/cc65). The included `Makefile` is very s
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## Notes
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I ended up disassembling both [NS.CLOCK.SYSTEM](ns.clock.system.s) (to understand the SYSTEM chaining - what a pain!) and The Cricket!'s [PRODOS.MOD](prodos.mod.s) and melding them together, adding in the detection routine following the protocol in the manual.
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I ended up disassembling both [NS.CLOCK.SYSTEM](../ns.clock/ns.clock.system.s) (to understand the SYSTEM chaining - what a pain!) and The Cricket!'s [PRODOS.MOD](prodos.mod.s) and melding them together, adding in the detection routine following the protocol in the manual.
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## Other Utilities
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@ -42,8 +42,6 @@ These `BRUN`able files are also built:
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* [SET.DATE](set.date.s) sets the Cricket's current date.
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* [SET.TIME](set.time.s) sets the Cricket's current time.
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Also, an updated [NS.CLOCK.SYSTEM](ns.clock.system.s) is included that fixes a typo, removes beeps, and is less chatty so you can have both `NS.CLOCK.SYSTEM` and `CRICKET.SYSTEM` in the same hard disk image if you use the image across different hardware configurations.
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## Resources
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Cricket disks on Asimov:
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@ -19,7 +19,7 @@
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.include "../inc/prodos.inc"
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;;; ************************************************************
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.include "driver_preamble.inc"
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.include "../inc/driver_preamble.inc"
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;;; ************************************************************
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;;; ============================================================
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@ -333,5 +333,5 @@ done: pla ; restore saved command state
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.assert sizeof_driver <= 125, error, "Clock code must be <= 125 bytes"
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;;; ************************************************************
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.include "driver_postamble.inc"
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.include "../inc/driver_postamble.inc"
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;;; ************************************************************
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@ -1,3 +0,0 @@
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poporg
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reloc_end := *
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@ -1,458 +0,0 @@
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;;; ------------------------------------------------------------
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;; SYS files load at $2000; relocates self to $1000
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.org SYS_ADDR
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dst_addr := $1000
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;;; ------------------------------------------------------------
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jmp relocate
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.byte MM, DD, YY ; version date stamp
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;;; ------------------------------------------------------------
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;;; Relocate this code from $2000 (.SYSTEM start location) to $1000
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;;; and start executing there. This is done so that the next .SYSTEM
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;;; file can be loaded/run at $2000.
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.proc relocate
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src := reloc_start
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dst := dst_addr
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ldx #(reloc_end - reloc_start + $FF) / $100 ; pages
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ldy #0
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load: lda src,y ; self-modified
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load_hi := *-1
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sta dst,y ; self-modified
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store_hi := *-1
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iny
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bne load
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inc load_hi
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inc store_hi
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dex
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bne load
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jmp main
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.endproc
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;;; ============================================================
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;;; Start of relocated code
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reloc_start := *
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pushorg dst_addr
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;;; ============================================================
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;;; Main routine
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;;; ============================================================
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.proc main
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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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jmp launch_next
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.endproc
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;;; ============================================================
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;;; Preserve state needed to chain to next file
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;;; ============================================================
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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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lda DEVNUM
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sta devnum
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;; --------------------------------------------------
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;; Identify the name of this SYS file, which should be present at
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;; $280 with or without a path prefix. Search pathname buffer
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;; backwards for '/', then copy name into |self_name|.
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;; Find '/' (which may not be present, prefix is optional)
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ldx PATHNAME
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beq no_name
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ldy #0 ; Y = length
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: lda PATHNAME,x
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and #$7f ; ignore high bit
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cmp #'/'
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beq copy_name
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iny
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dex
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bne :-
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;; Copy name into |self_name| buffer
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copy_name:
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cpy #0
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beq no_name
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sty self_name
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ldx PATHNAME
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: lda PATHNAME,x
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sta self_name,y
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dex
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dey
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bne :-
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;; Done
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rts
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no_name:
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lda #0
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sta self_name
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rts
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.endproc
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devnum: .byte 0
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self_name: .res 16
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;;; ============================================================
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;;; Init system state
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;;; ============================================================
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;;; Before installing, get the system to a known state.
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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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block_len = $200
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DEFINE_ON_LINE_PARAMS on_line_params,,online_buf
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DEFINE_OPEN_PARAMS open_params, PATHNAME, io_buf
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DEFINE_READ_PARAMS read_params, SYS_ADDR, SYS_LEN
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DEFINE_READ_PARAMS read_block_params, dir_buf, block_len
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DEFINE_CLOSE_PARAMS close_params
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.proc launch_next
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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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ptr := $A5
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num := $A7
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len := $A8
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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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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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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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jmp on_error
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: lda #'/' ; Prefix by '/'
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sta PATHNAME+1
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lda online_buf
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and #$0F ; Mask off length
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sta PATHNAME
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ldx #0 ; Copy name
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: lda online_buf+1,x
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sta PATHNAME+2,x
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inx
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cpx PATHNAME
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bne :-
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inx ; One more for '/' prefix
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stx PATHNAME
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;; Open directory
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MLI_CALL OPEN, open_params
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bcc :+
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jmp on_error
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: lda open_params::ref_num
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sta read_block_params::ref_num
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sta close_params::ref_num
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;; Read first "block"
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MLI_CALL READ, read_block_params
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bcc :+
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jmp on_error
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;; Get sizes out of header
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: lda dir_buf + VolumeDirectoryHeader::entry_length
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sta entry_length_mod
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lda dir_buf + VolumeDirectoryHeader::entries_per_block
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sta entries_per_block_mod
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lda #1
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sta num
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;; Set up pointers to entry
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lda #<(dir_buf + .sizeof(VolumeDirectoryHeader))
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sta ptr
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lda #>(dir_buf + .sizeof(VolumeDirectoryHeader))
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sta ptr+1
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;; Process directory entry
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entry: ldy #FileEntry::file_type ; file_type
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lda (ptr),y
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cmp #$FF ; type=SYS
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bne next
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ldy #FileEntry::storage_type_name_length
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lda (ptr),y
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and #$30 ; regular file (not directory, pascal)
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beq next
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lda (ptr),y
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and #$0F ; name_length
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sta len
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tay
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;; Compare suffix - is it .SYSTEM?
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ldx suffix
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: lda (ptr),y
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cmp suffix,x
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bne next
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dey
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dex
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bne :-
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;; Yes; is it *this* .SYSTEM file?
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ldy self_name
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cpy len
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bne handle_sys_file
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: lda (ptr),y
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cmp self_name,y
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bne handle_sys_file
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dey
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bne :-
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sec
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ror found_self_flag
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;; Move to the next entry
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next: lda ptr
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clc
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adc #$27 ; self-modified: entry_length
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entry_length_mod := *-1
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sta ptr
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bcc :+
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inc ptr+1
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: inc num
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lda num
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cmp #$0D ; self-modified: entries_per_block
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entries_per_block_mod := *-1
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bcc entry
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;; Read next "block"
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MLI_CALL READ, read_block_params
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bcs not_found
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;; Set up pointers to entry
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lda #0
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sta num
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lda #<(dir_buf + $04)
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sta ptr
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lda #>(dir_buf + $04)
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sta ptr+1
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jmp entry
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;; --------------------------------------------------
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;; Found a .SYSTEM file which is not this one; invoke
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;; it if follows this one.
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handle_sys_file:
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bit found_self_flag
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bpl next
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MLI_CALL CLOSE, close_params
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;; Compose the path to invoke.
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ldx PATHNAME
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inx
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lda #'/'
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sta PATHNAME,x
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ldy #0
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: iny
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inx
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lda (ptr),y
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sta PATHNAME,x
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cpy len
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bcc :-
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stx PATHNAME
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jmp invoke_system_file
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not_found:
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jsr zstrout
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scrcode "\r\r* Unable to find next '.SYSTEM' file *\r"
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.byte 0
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bit KBDSTRB
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: lda KBD
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bpl :-
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bit KBDSTRB
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jmp quit
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.endproc
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;;; ------------------------------------------------------------
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;;; Load/execute the system file in PATHNAME
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.proc invoke_system_file
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MLI_CALL OPEN, open_params
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bcs on_error
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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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MLI_CALL CLOSE, close_params
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bcs on_error
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jmp SYS_ADDR ; Invoke loaded SYSTEM file
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.endproc
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;;; ------------------------------------------------------------
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;;; Error handler - invoked if any ProDOS error occurs.
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.proc on_error
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pha
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jsr zstrout
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scrcode "\r\r* Disk Error $"
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.byte 0
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pla
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jsr PRBYTE
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jsr zstrout
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scrcode " *\r"
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.byte 0
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bit KBDSTRB
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: lda KBD
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bpl :-
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bit KBDSTRB
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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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suffix:
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PASCAL_STRING ".SYSTEM"
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found_self_flag:
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.byte 0
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;;; ============================================================
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;;; Common Routines
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;;; ============================================================
|
||||
|
||||
;;; ------------------------------------------------------------
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;;; Output a high-ascii, null-terminated string.
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;;; String immediately follows the JSR.
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.proc zstrout
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ptr := $A5
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pla ; read address from stack
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sta ptr
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pla
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sta ptr+1
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bne skip ; always (since data not on ZP)
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next: cmp #HI('a') ; lower-case?
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bcc :+
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and lowercase_mask ; make upper-case if needed
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: jsr COUT
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skip: inc ptr
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bne :+
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inc ptr+1
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: ldy #0
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lda (ptr),y
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bne next
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lda ptr+1 ; restore address to stack
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pha
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lda ptr
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pha
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rts
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.endproc
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lowercase_mask:
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.byte $FF ; Set to $DF on systems w/o lower-case
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|
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;;; ------------------------------------------------------------
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;;; COUT a 2-digit number in A
|
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|
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.proc cout_number
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ldx #HI('0')
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cmp #10 ; >= 10?
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bcc tens
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||||
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;; divide by 10, dividend(+'0') in x remainder in a
|
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: sbc #10
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inx
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cmp #10
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bcs :-
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tens: pha
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cpx #HI('0')
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beq units
|
||||
txa
|
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jsr COUT
|
||||
|
||||
units: pla
|
||||
ora #HI('0')
|
||||
jsr COUT
|
||||
rts
|
||||
.endproc
|
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|
|
@ -0,0 +1,34 @@
|
|||
|
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CAFLAGS = --target apple2enh --list-bytes 0
|
||||
LDFLAGS = --config apple2-asm.cfg
|
||||
|
||||
OUTDIR = out
|
||||
|
||||
HEADERS = $(wildcard *.inc) $(wildcard ../inc/*.inc)
|
||||
|
||||
TARGETS = \
|
||||
$(OUTDIR)/ns.clock.system.SYS
|
||||
|
||||
# For timestamps
|
||||
MM = $(shell date "+%-m")
|
||||
DD = $(shell date "+%-d")
|
||||
YY = $(shell date "+%-y")
|
||||
DEFINES = -D DD=$(DD) -D MM=$(MM) -D YY=$(YY)
|
||||
|
||||
.PHONY: clean all
|
||||
all: $(OUTDIR) $(TARGETS)
|
||||
|
||||
$(OUTDIR):
|
||||
mkdir -p $(OUTDIR)
|
||||
|
||||
clean:
|
||||
rm -f $(OUTDIR)/*.o
|
||||
rm -f $(OUTDIR)/*.list
|
||||
rm -f $(OUTDIR)/$(TARGETS)
|
||||
|
||||
$(OUTDIR)/%.o: %.s $(HEADERS)
|
||||
ca65 $(CAFLAGS) $(DEFINES) --listing $(basename $@).list -o $@ $<
|
||||
|
||||
$(OUTDIR)/%.SYS: $(OUTDIR)/%.o
|
||||
ld65 $(LDFLAGS) -o $@ $<
|
||||
xattr -wx prodos.AuxType '00 20' $@
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
# No Slot Clock ProDOS Driver
|
||||
|
||||
Adapted from `NS.CLOCK.SYSTEM` (by "CAP"), with these changes:
|
||||
|
||||
* Fixes a typo
|
||||
* Removes beeps
|
||||
* Is less chatty so you can have multiple clock drivers, e.g. if you use the same hard disk image across different hardware configurations
|
||||
* Uses file I/O rather than block I/O for chaining
|
||||
* Does not hard-code driver file name
|
||||
|
|
@ -18,7 +18,7 @@
|
|||
.include "../inc/prodos.inc"
|
||||
|
||||
;;; ************************************************************
|
||||
.include "driver_preamble.inc"
|
||||
.include "../inc/driver_preamble.inc"
|
||||
;;; ************************************************************
|
||||
|
||||
;;; ============================================================
|
||||
|
|
@ -309,5 +309,5 @@ unlock:
|
|||
|
||||
|
||||
;;; ************************************************************
|
||||
.include "driver_postamble.inc"
|
||||
.include "../inc/driver_postamble.inc"
|
||||
;;; ************************************************************
|
||||
|
|
@ -1,3 +0,0 @@
|
|||
|
||||
poporg
|
||||
reloc_end := *
|
||||
|
|
@ -1,458 +0,0 @@
|
|||
;;; ------------------------------------------------------------
|
||||
|
||||
;; SYS files load at $2000; relocates self to $1000
|
||||
.org SYS_ADDR
|
||||
dst_addr := $1000
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
|
||||
jmp relocate
|
||||
|
||||
.byte MM, DD, YY ; version date stamp
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
;;; Relocate this code from $2000 (.SYSTEM start location) to $1000
|
||||
;;; and start executing there. This is done so that the next .SYSTEM
|
||||
;;; file can be loaded/run at $2000.
|
||||
|
||||
.proc relocate
|
||||
src := reloc_start
|
||||
dst := dst_addr
|
||||
|
||||
ldx #(reloc_end - reloc_start + $FF) / $100 ; pages
|
||||
ldy #0
|
||||
load: lda src,y ; self-modified
|
||||
load_hi := *-1
|
||||
sta dst,y ; self-modified
|
||||
store_hi := *-1
|
||||
iny
|
||||
bne load
|
||||
inc load_hi
|
||||
inc store_hi
|
||||
dex
|
||||
bne load
|
||||
|
||||
jmp main
|
||||
.endproc
|
||||
|
||||
;;; ============================================================
|
||||
;;; Start of relocated code
|
||||
|
||||
reloc_start := *
|
||||
pushorg dst_addr
|
||||
|
||||
;;; ============================================================
|
||||
;;; Main routine
|
||||
;;; ============================================================
|
||||
|
||||
.proc main
|
||||
jsr save_chain_info
|
||||
jsr init_system
|
||||
jsr maybe_install_driver
|
||||
jmp launch_next
|
||||
.endproc
|
||||
|
||||
;;; ============================================================
|
||||
;;; Preserve state needed to chain to next file
|
||||
;;; ============================================================
|
||||
|
||||
.proc save_chain_info
|
||||
;; --------------------------------------------------
|
||||
;; Save most recent device for later, when chaining
|
||||
;; to next .SYSTEM file.
|
||||
lda DEVNUM
|
||||
sta devnum
|
||||
|
||||
;; --------------------------------------------------
|
||||
;; Identify the name of this SYS file, which should be present at
|
||||
;; $280 with or without a path prefix. Search pathname buffer
|
||||
;; backwards for '/', then copy name into |self_name|.
|
||||
|
||||
;; Find '/' (which may not be present, prefix is optional)
|
||||
ldx PATHNAME
|
||||
beq no_name
|
||||
ldy #0 ; Y = length
|
||||
: lda PATHNAME,x
|
||||
and #$7f ; ignore high bit
|
||||
cmp #'/'
|
||||
beq copy_name
|
||||
iny
|
||||
dex
|
||||
bne :-
|
||||
|
||||
;; Copy name into |self_name| buffer
|
||||
copy_name:
|
||||
cpy #0
|
||||
beq no_name
|
||||
sty self_name
|
||||
|
||||
ldx PATHNAME
|
||||
: lda PATHNAME,x
|
||||
sta self_name,y
|
||||
dex
|
||||
dey
|
||||
bne :-
|
||||
|
||||
;; Done
|
||||
rts
|
||||
|
||||
no_name:
|
||||
lda #0
|
||||
sta self_name
|
||||
rts
|
||||
.endproc
|
||||
|
||||
devnum: .byte 0
|
||||
self_name: .res 16
|
||||
|
||||
;;; ============================================================
|
||||
;;; Init system state
|
||||
;;; ============================================================
|
||||
|
||||
;;; Before installing, get the system to a known state.
|
||||
|
||||
.proc init_system
|
||||
cld
|
||||
bit ROMIN2
|
||||
|
||||
;; Update reset vector - ProDOS QUIT
|
||||
lda #<quit
|
||||
sta $03F2
|
||||
lda #>quit
|
||||
sta $03F3
|
||||
eor #$A5
|
||||
sta $03F4
|
||||
|
||||
;; Quit 80-column firmware
|
||||
lda #$95 ; Ctrl+U (quit 80 col firmware)
|
||||
jsr COUT
|
||||
|
||||
;; Reset I/O
|
||||
sta CLR80VID
|
||||
sta CLRALTCHAR
|
||||
jsr SETVID
|
||||
jsr SETKBD
|
||||
jsr SETNORM
|
||||
jsr INIT
|
||||
jsr HOME
|
||||
|
||||
;; Update System Bit Map
|
||||
ldx #BITMAP_SIZE-1
|
||||
lda #%00000001 ; protect page $BF
|
||||
: sta BITMAP,x
|
||||
lda #%00000000 ; nothing else protected until...
|
||||
dex
|
||||
bne :-
|
||||
lda #%11001111 ; ZP ($00), stack ($01), text page 1 ($04-$07)
|
||||
sta BITMAP
|
||||
|
||||
;; Determine lowercase support
|
||||
lda MACHID
|
||||
and #$88 ; IIe or IIc (or IIgs) ?
|
||||
bne :+
|
||||
lda #$DF
|
||||
sta lowercase_mask ; lower case to upper case
|
||||
|
||||
: rts
|
||||
.endproc
|
||||
|
||||
;;; ============================================================
|
||||
;;; Find and invoke the next .SYSTEM file
|
||||
;;; ============================================================
|
||||
|
||||
online_buf := $1C00
|
||||
io_buf := $1C00
|
||||
dir_buf := $2000
|
||||
block_len = $200
|
||||
|
||||
DEFINE_ON_LINE_PARAMS on_line_params,,online_buf
|
||||
DEFINE_OPEN_PARAMS open_params, PATHNAME, io_buf
|
||||
DEFINE_READ_PARAMS read_params, SYS_ADDR, SYS_LEN
|
||||
DEFINE_READ_PARAMS read_block_params, dir_buf, block_len
|
||||
DEFINE_CLOSE_PARAMS close_params
|
||||
|
||||
|
||||
.proc launch_next
|
||||
;; Read directory and look for .SYSTEM files; find this
|
||||
;; one, and invoke the following one.
|
||||
|
||||
ptr := $A5
|
||||
num := $A7
|
||||
len := $A8
|
||||
|
||||
;; --------------------------------------------------
|
||||
;; Own name found? If not, just quit
|
||||
lda self_name
|
||||
bne :+
|
||||
jmp quit
|
||||
|
||||
;; --------------------------------------------------
|
||||
;; Find name of boot device, copy into PATHNAME
|
||||
: lda devnum
|
||||
sta on_line_params::unit_num
|
||||
MLI_CALL ON_LINE, on_line_params
|
||||
bcc :+
|
||||
jmp on_error
|
||||
|
||||
: lda #'/' ; Prefix by '/'
|
||||
sta PATHNAME+1
|
||||
lda online_buf
|
||||
and #$0F ; Mask off length
|
||||
sta PATHNAME
|
||||
ldx #0 ; Copy name
|
||||
: lda online_buf+1,x
|
||||
sta PATHNAME+2,x
|
||||
inx
|
||||
cpx PATHNAME
|
||||
bne :-
|
||||
inx ; One more for '/' prefix
|
||||
stx PATHNAME
|
||||
|
||||
;; Open directory
|
||||
MLI_CALL OPEN, open_params
|
||||
bcc :+
|
||||
jmp on_error
|
||||
: lda open_params::ref_num
|
||||
sta read_block_params::ref_num
|
||||
sta close_params::ref_num
|
||||
|
||||
;; Read first "block"
|
||||
MLI_CALL READ, read_block_params
|
||||
bcc :+
|
||||
jmp on_error
|
||||
|
||||
;; Get sizes out of header
|
||||
: lda dir_buf + VolumeDirectoryHeader::entry_length
|
||||
sta entry_length_mod
|
||||
lda dir_buf + VolumeDirectoryHeader::entries_per_block
|
||||
sta entries_per_block_mod
|
||||
lda #1
|
||||
sta num
|
||||
|
||||
;; Set up pointers to entry
|
||||
lda #<(dir_buf + .sizeof(VolumeDirectoryHeader))
|
||||
sta ptr
|
||||
lda #>(dir_buf + .sizeof(VolumeDirectoryHeader))
|
||||
sta ptr+1
|
||||
|
||||
;; Process directory entry
|
||||
entry: ldy #FileEntry::file_type ; file_type
|
||||
lda (ptr),y
|
||||
cmp #$FF ; type=SYS
|
||||
bne next
|
||||
ldy #FileEntry::storage_type_name_length
|
||||
lda (ptr),y
|
||||
and #$30 ; regular file (not directory, pascal)
|
||||
beq next
|
||||
lda (ptr),y
|
||||
and #$0F ; name_length
|
||||
sta len
|
||||
tay
|
||||
|
||||
;; Compare suffix - is it .SYSTEM?
|
||||
ldx suffix
|
||||
: lda (ptr),y
|
||||
cmp suffix,x
|
||||
bne next
|
||||
dey
|
||||
dex
|
||||
bne :-
|
||||
|
||||
;; Yes; is it *this* .SYSTEM file?
|
||||
ldy self_name
|
||||
cpy len
|
||||
bne handle_sys_file
|
||||
: lda (ptr),y
|
||||
cmp self_name,y
|
||||
bne handle_sys_file
|
||||
dey
|
||||
bne :-
|
||||
sec
|
||||
ror found_self_flag
|
||||
|
||||
;; Move to the next entry
|
||||
next: lda ptr
|
||||
clc
|
||||
adc #$27 ; self-modified: entry_length
|
||||
entry_length_mod := *-1
|
||||
sta ptr
|
||||
bcc :+
|
||||
inc ptr+1
|
||||
: inc num
|
||||
lda num
|
||||
cmp #$0D ; self-modified: entries_per_block
|
||||
entries_per_block_mod := *-1
|
||||
bcc entry
|
||||
|
||||
;; Read next "block"
|
||||
MLI_CALL READ, read_block_params
|
||||
bcs not_found
|
||||
|
||||
;; Set up pointers to entry
|
||||
lda #0
|
||||
sta num
|
||||
lda #<(dir_buf + $04)
|
||||
sta ptr
|
||||
lda #>(dir_buf + $04)
|
||||
sta ptr+1
|
||||
jmp entry
|
||||
|
||||
;; --------------------------------------------------
|
||||
;; Found a .SYSTEM file which is not this one; invoke
|
||||
;; it if follows this one.
|
||||
handle_sys_file:
|
||||
bit found_self_flag
|
||||
bpl next
|
||||
|
||||
MLI_CALL CLOSE, close_params
|
||||
|
||||
;; Compose the path to invoke.
|
||||
ldx PATHNAME
|
||||
inx
|
||||
lda #'/'
|
||||
sta PATHNAME,x
|
||||
ldy #0
|
||||
: iny
|
||||
inx
|
||||
lda (ptr),y
|
||||
sta PATHNAME,x
|
||||
cpy len
|
||||
bcc :-
|
||||
stx PATHNAME
|
||||
|
||||
jmp invoke_system_file
|
||||
|
||||
not_found:
|
||||
jsr zstrout
|
||||
scrcode "\r\r* Unable to find next '.SYSTEM' file *\r"
|
||||
.byte 0
|
||||
|
||||
bit KBDSTRB
|
||||
: lda KBD
|
||||
bpl :-
|
||||
bit KBDSTRB
|
||||
jmp quit
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
;;; Load/execute the system file in PATHNAME
|
||||
|
||||
.proc invoke_system_file
|
||||
MLI_CALL OPEN, open_params
|
||||
bcs on_error
|
||||
|
||||
lda open_params::ref_num
|
||||
sta read_params::ref_num
|
||||
sta close_params::ref_num
|
||||
|
||||
MLI_CALL READ, read_params
|
||||
bcs on_error
|
||||
|
||||
MLI_CALL CLOSE, close_params
|
||||
bcs on_error
|
||||
|
||||
jmp SYS_ADDR ; Invoke loaded SYSTEM file
|
||||
.endproc
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
;;; Error handler - invoked if any ProDOS error occurs.
|
||||
|
||||
.proc on_error
|
||||
pha
|
||||
jsr zstrout
|
||||
scrcode "\r\r* Disk Error $"
|
||||
.byte 0
|
||||
|
||||
pla
|
||||
jsr PRBYTE
|
||||
|
||||
jsr zstrout
|
||||
scrcode " *\r"
|
||||
.byte 0
|
||||
|
||||
bit KBDSTRB
|
||||
: lda KBD
|
||||
bpl :-
|
||||
bit KBDSTRB
|
||||
jmp quit
|
||||
.endproc
|
||||
|
||||
.proc quit
|
||||
MLI_CALL QUIT, quit_params
|
||||
brk ; crash if QUIT fails
|
||||
|
||||
DEFINE_QUIT_PARAMS quit_params
|
||||
.endproc
|
||||
|
||||
;;; ============================================================
|
||||
;;; Data
|
||||
|
||||
suffix:
|
||||
PASCAL_STRING ".SYSTEM"
|
||||
|
||||
found_self_flag:
|
||||
.byte 0
|
||||
|
||||
;;; ============================================================
|
||||
;;; Common Routines
|
||||
;;; ============================================================
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
;;; Output a high-ascii, null-terminated string.
|
||||
;;; String immediately follows the JSR.
|
||||
|
||||
.proc zstrout
|
||||
ptr := $A5
|
||||
|
||||
pla ; read address from stack
|
||||
sta ptr
|
||||
pla
|
||||
sta ptr+1
|
||||
bne skip ; always (since data not on ZP)
|
||||
|
||||
next: cmp #HI('a') ; lower-case?
|
||||
bcc :+
|
||||
and lowercase_mask ; make upper-case if needed
|
||||
: jsr COUT
|
||||
skip: inc ptr
|
||||
bne :+
|
||||
inc ptr+1
|
||||
: ldy #0
|
||||
lda (ptr),y
|
||||
bne next
|
||||
|
||||
lda ptr+1 ; restore address to stack
|
||||
pha
|
||||
lda ptr
|
||||
pha
|
||||
rts
|
||||
.endproc
|
||||
|
||||
lowercase_mask:
|
||||
.byte $FF ; Set to $DF on systems w/o lower-case
|
||||
|
||||
;;; ------------------------------------------------------------
|
||||
;;; COUT a 2-digit number in A
|
||||
|
||||
.proc cout_number
|
||||
ldx #HI('0')
|
||||
cmp #10 ; >= 10?
|
||||
bcc tens
|
||||
|
||||
;; divide by 10, dividend(+'0') in x remainder in a
|
||||
: sbc #10
|
||||
inx
|
||||
cmp #10
|
||||
bcs :-
|
||||
|
||||
tens: pha
|
||||
cpx #HI('0')
|
||||
beq units
|
||||
txa
|
||||
jsr COUT
|
||||
|
||||
units: pla
|
||||
ora #HI('0')
|
||||
jsr COUT
|
||||
rts
|
||||
.endproc
|
||||
|
|
@ -18,7 +18,7 @@
|
|||
.include "../inc/prodos.inc"
|
||||
|
||||
;;; ************************************************************
|
||||
.include "driver_preamble.inc"
|
||||
.include "../inc/driver_preamble.inc"
|
||||
;;; ************************************************************
|
||||
|
||||
;;; ============================================================
|
||||
|
|
@ -700,5 +700,5 @@ stash_01 := *+2+$180 ; len: $80
|
|||
.assert stash_01+$80 < data_buf, error, "Too long"
|
||||
|
||||
;;; ************************************************************
|
||||
.include "driver_postamble.inc"
|
||||
.include "../inc/driver_postamble.inc"
|
||||
;;; ************************************************************
|
||||
|
|
|
|||
Loading…
Reference in New Issue