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Converted the Atmos configuration to the new constructor segment model.

This commit is contained in:
Greg King 2016-03-18 11:28:56 -04:00
parent 78dcb61cb8
commit 7773fcb1e1
7 changed files with 73 additions and 69 deletions
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16
cfg/atmos.cfg
View File

@ -11,22 +11,22 @@ MEMORY {
ZP: file = "", define = yes, start = $00E2, size = $001A;
TAPEHDR: file = %O, type = ro, start = $0000, size = $001F;
BASHEAD: file = %O, define = yes, start = $0501, size = $000D;
MAIN: file = %O, define = yes, start = __BASHEAD_LAST__, size = __RAMEND__ - __MAIN_START__ - __STACKSIZE__;
MAIN: file = %O, define = yes, start = __BASHEAD_LAST__, size = __RAMEND__ - __MAIN_START__;
BSS: file = "", start = __ONCE_RUN__, size = __RAMEND__ - __STACKSIZE__ - __ONCE_RUN__;
}
SEGMENTS {
ZEROPAGE: load = ZP, type = zp;
TAPEHDR: load = TAPEHDR, type = ro;
BASHDR: load = BASHEAD, type = ro, define = yes, optional = yes;
BASHDR: load = BASHEAD, type = ro, optional = yes;
STARTUP: load = MAIN, type = ro;
LOWCODE: load = MAIN, type = ro, optional = yes;
LOWCODE: load = MAIN, type = ro, optional = yes;
CODE: load = MAIN, type = ro;
RODATA: load = MAIN, type = ro;
ONCE: load = MAIN, type = ro, optional = yes;
DATA: load = MAIN, type = rw;
INIT: load = MAIN, type = rw, optional = yes;
ZPSAVE1: load = MAIN, type = rw, define = yes; # ZPSAVE1, ZPSAVE2 must be together
ZPSAVE2: load = MAIN, type = bss; # see "libsrc/atmos/crt0.s"
BSS: load = MAIN, type = bss, define = yes;
INIT: load = MAIN, type = rw;
ONCE: load = MAIN, type = ro, define = yes;
BASTAIL: load = MAIN, type = ro, optional = yes;
BSS: load = BSS, type = bss, define = yes;
}
FEATURES {
CONDES: type = constructor,

12
libsrc/atmos/bashdr.s
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@ -1,6 +1,6 @@
;
; 2010-11-14, Ullrich von Bassewitz
; 2014-09-06, Greg King
; 2016-03-17, Greg King
;
; This module supplies a small BASIC stub program that uses CALL
; to jump to the machine-language code that follows it.
@ -22,3 +22,13 @@
.byte $00 ; End of BASIC line
Next: .addr $0000 ; BASIC program end marker
Start:
; ------------------------------------------------------------------------
; This padding is needed by a bug in the ROM.
; (The CLOAD command starts BASIC's variables table on top of the last byte
; that was loaded [instead of at the next address].)
.segment "BASTAIL"
.byte 0

3
libsrc/atmos/capslock.s
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@ -15,7 +15,8 @@
;--------------------------------------------------------------------------
; Put this constructor into a segment that can be re-used by programs.
; Put this constructor into a segment whose space
; will be re-used by BSS, the heap, and the C stack.
;
.segment "ONCE"

4
libsrc/atmos/cgetc.s
View File

@ -55,8 +55,8 @@
.endproc
; ------------------------------------------------------------------------
; Switch the cursor off. Code goes into the ONCE segment
; which may be reused after it is run.
; Switch the cursor off. Code goes into the ONCE segment,
; which will be reused after it is run.
.segment "ONCE"

79
libsrc/atmos/crt0.s
View File

@ -2,14 +2,15 @@
; Startup code for cc65 (Oric version)
;
; By Debrune Jérôme <jede@oric.org> and Ullrich von Bassewitz <uz@cc65.org>
; 2015-01-09, Greg King
; 2016-03-18, Greg King
;
.export _exit
.export __STARTUP__ : absolute = 1 ; Mark as startup
.import initlib, donelib
.import callmain, zerobss
.import __MAIN_START__, __MAIN_SIZE__, __STACKSIZE__
.import __MAIN_START__, __MAIN_SIZE__
.include "zeropage.inc"
.include "atmos.inc"
@ -19,39 +20,17 @@
.segment "STARTUP"
; Save the zero-page area that we're about to use.
ldx #zpspace-1
L1: lda sp,x
sta zpsave,x
dex
bpl L1
; Clear the BSS data.
jsr zerobss
; Currently, color isn't supported on the text screen.
; Unprotect screen columns 0 and 1 (where each line's color codes would sit).
lda STATUS
sta stsave
and #%11011111
sta STATUS
; Save some system stuff; and, set up the stack.
tsx
stx spsave ; Save system stk ptr
lda #<(__MAIN_START__ + __MAIN_SIZE__ + __STACKSIZE__)
ldx #>(__MAIN_START__ + __MAIN_SIZE__ + __STACKSIZE__)
sta sp
stx sp+1 ; Set argument stack ptr
; Save space by putting some of the start-up code in a segment
; that will be re-used.
; Call the module constructors.
jsr init
jsr initlib
; Clear the BSS variables (after the constructors have been run).
jsr zerobss
; Push the command-line arguments; and, call main().
@ -70,7 +49,7 @@ _exit: jsr donelib
; Copy back the zero-page stuff.
ldx #zpspace-1
ldx #zpspace - 1
L2: lda zpsave,x
sta sp,x
dex
@ -81,28 +60,42 @@ L2: lda zpsave,x
rts
; ------------------------------------------------------------------------
; Put this code in a place that will be re-used by BSS, the heap,
; and the C stack.
.segment "ZPSAVE1"
.segment "ONCE"
zpsave:
; Save the zero-page area that we're about to use.
; This padding is needed by a bug in the ROM.
; (The CLOAD command starts BASIC's variables table on top of the last byte
; that was loaded [instead of at the next address].)
; This is overlaid on a buffer, so that it doesn't use extra space in RAM.
init: ldx #zpspace - 1
L1: lda sp,x
sta zpsave,x
dex
bpl L1
.byte 0
; Currently, color isn't supported on the text screen.
; Unprotect screen columns 0 and 1 (where each line's color codes would sit).
; The segments "ZPSAVE1" and "ZPSAVE2" always must be together.
; They create a single object (the zpsave buffer).
lda STATUS
sta stsave
and #%11011111
sta STATUS
.segment "ZPSAVE2"
; Set up the C stack.
.res zpspace - 1
lda #<(__MAIN_START__ + __MAIN_SIZE__)
ldx #>(__MAIN_START__ + __MAIN_SIZE__)
sta sp
stx sp+1 ; Set argument stack ptr
; Call the module constructors.
jmp initlib
; ------------------------------------------------------------------------
.bss
.segment "INIT"
spsave: .res 1
stsave: .res 1
zpsave: .res zpspace

5
libsrc/atmos/mainargs.s
View File

@ -18,7 +18,7 @@ REM = $9D ; BASIC token-code
;---------------------------------------------------------------------------
; Get possible command-line arguments. Goes into the special ONCE segment,
; which may be reused after the startup code is run
; which will be reused after the startup code is run.
.segment "ONCE"
@ -119,8 +119,6 @@ done: lda #<argv
.endproc
; These arrays are zeroed before initmainargs is called.
.segment "INIT"
term: .res 1
@ -129,6 +127,7 @@ args: .res SCREEN_XSIZE * 2 - 1
.data
; This array has zeroes when initmainargs starts.
; char* argv[MAXARGS+1]={name};
argv: .addr name

23
libsrc/atmos/tapehdr.s
View File

@ -1,6 +1,6 @@
;
; Based on code by Debrune Jérôme <jede@oric.org>
; 2015-01-08, Greg King
; 2016-03-17, Greg King
;
; The following symbol is used by the linker config. file
@ -8,7 +8,8 @@
.export __TAPEHDR__:abs = 1
; These symbols, also, come from the configuration file.
.import __BASHDR_LOAD__, __ZPSAVE1_LOAD__, __AUTORUN__, __PROGFLAG__
.import __AUTORUN__, __PROGFLAG__
.import __BASHEAD_START__, __MAIN_LAST__
; ------------------------------------------------------------------------
@ -16,16 +17,16 @@
.segment "TAPEHDR"
.byte $16, $16, $16 ; Sync bytes
.byte $24 ; Beginning-of-header marker
.byte $16, $16, $16 ; Sync bytes
.byte $24 ; Beginning-of-header marker
.byte $00 ; $2B0
.byte $00 ; $2AF
.byte <__PROGFLAG__ ; $2AE Language flag ($00=BASIC, $80=machine code)
.byte <__AUTORUN__ ; $2AD Auto-run flag ($C7=run, $00=only load)
.dbyt __ZPSAVE1_LOAD__ ;$2AB Address of end of file
.dbyt __BASHDR_LOAD__ ; $2A9 Address of start of file
.byte $00 ; $2A8
.byte $00 ; $2B0
.byte $00 ; $2AF
.byte <__PROGFLAG__ ; $2AE Language flag ($00=BASIC, $80=machine code)
.byte <__AUTORUN__ ; $2AD Auto-run flag ($C7=run, $00=only load)
.dbyt __MAIN_LAST__ - 1 ; $2AB Address of end of file
.dbyt __BASHEAD_START__ ; $2A9 Address of start of file
.byte $00 ; $2A8
; File name (a maximum of 17 characters), zero-terminated
.asciiz .sprintf("%u", .time)