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Merge pull request #50 from groessler/something_to_pull

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Add "system check" load chunk to regular (non-XL) Atari target.
This commit is contained in:
Oliver Schmidt 2013-10-04 02:43:48 -07:00
commit 3e2e41a63f
4 changed files with 184 additions and 90 deletions
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86
cfg/atari-overlay.cfg
View File

@ -1,47 +1,65 @@
FEATURES {
STARTADDRESS: default = $2E00;
STARTADDRESS: default = $2000;
}
SYMBOLS {
__STACKSIZE__: type = weak, value = $0800; # 2k stack
__OVERLAYSIZE__: type = weak, value = $1000; # 4k overlay
__STARTADDRESS__: type = export, value = %S;
__RESERVED_MEMORY__: type = weak, value = $0000;
syschk: type = import; # force inclusion of SYSCHK
}
MEMORY {
ZP: file = "", define = yes, start = $0082, size = $007E;
HEADER: file = %O, start = $0000, size = $0006;
RAM: file = %O, start = %S + __OVERLAYSIZE__, size = $BC20 - __STACKSIZE__ - __OVERLAYSIZE__ - %S;
TRAILER: file = %O, start = $0000, size = $0006;
OVL1: file = "%O.1", start = %S, size = __OVERLAYSIZE__;
OVL2: file = "%O.2", start = %S, size = __OVERLAYSIZE__;
OVL3: file = "%O.3", start = %S, size = __OVERLAYSIZE__;
OVL4: file = "%O.4", start = %S, size = __OVERLAYSIZE__;
OVL5: file = "%O.5", start = %S, size = __OVERLAYSIZE__;
OVL6: file = "%O.6", start = %S, size = __OVERLAYSIZE__;
OVL7: file = "%O.7", start = %S, size = __OVERLAYSIZE__;
OVL8: file = "%O.8", start = %S, size = __OVERLAYSIZE__;
OVL9: file = "%O.9", start = %S, size = __OVERLAYSIZE__;
ZP: file = "", define = yes, start = $0082, size = $007E;
# file header, just $FFFF
HEADER: file = %O, start = $0000, size = $0002;
# "system check" load chunk
SYSCHKHDR: file = %O, start = $0000, size = $0004;
SYSCHKCHNK: file = %O, start = $2E00, size = $0300;
SYSCHKTRL: file = %O, start = $0000, size = $0006;
# "main program" load chunk
MAINHDR: file = %O, start = $0000, size = $0004;
RAM: file = %O, define = yes, start = %S + __OVERLAYSIZE__,
size = $BC20 - __OVERLAYSIZE__ - __STACKSIZE__ - __RESERVED_MEMORY__ - %S;
TRAILER: file = %O, start = $0000, size = $0006;
OVL1: file = "%O.1", start = %S, size = __OVERLAYSIZE__;
OVL2: file = "%O.2", start = %S, size = __OVERLAYSIZE__;
OVL3: file = "%O.3", start = %S, size = __OVERLAYSIZE__;
OVL4: file = "%O.4", start = %S, size = __OVERLAYSIZE__;
OVL5: file = "%O.5", start = %S, size = __OVERLAYSIZE__;
OVL6: file = "%O.6", start = %S, size = __OVERLAYSIZE__;
OVL7: file = "%O.7", start = %S, size = __OVERLAYSIZE__;
OVL8: file = "%O.8", start = %S, size = __OVERLAYSIZE__;
OVL9: file = "%O.9", start = %S, size = __OVERLAYSIZE__;
}
SEGMENTS {
EXEHDR: load = HEADER, type = ro;
STARTUP: load = RAM, type = ro, define = yes;
LOWCODE: load = RAM, type = ro, define = yes, optional = yes;
INIT: load = RAM, type = ro, optional = yes;
CODE: load = RAM, type = ro, define = yes;
RODATA: load = RAM, type = ro;
DATA: load = RAM, type = rw;
BSS: load = RAM, type = bss, define = yes;
ZEROPAGE: load = ZP, type = zp;
EXTZP: load = ZP, type = zp, optional = yes;
AUTOSTRT: load = TRAILER, type = ro;
OVERLAY1: load = OVL1, type = ro, define = yes, optional = yes;
OVERLAY2: load = OVL2, type = ro, define = yes, optional = yes;
OVERLAY3: load = OVL3, type = ro, define = yes, optional = yes;
OVERLAY4: load = OVL4, type = ro, define = yes, optional = yes;
OVERLAY5: load = OVL5, type = ro, define = yes, optional = yes;
OVERLAY6: load = OVL6, type = ro, define = yes, optional = yes;
OVERLAY7: load = OVL7, type = ro, define = yes, optional = yes;
OVERLAY8: load = OVL8, type = ro, define = yes, optional = yes;
OVERLAY9: load = OVL9, type = ro, define = yes, optional = yes;
EXEHDR: load = HEADER, type = ro;
SYSCHKHDR: load = SYSCHKHDR, type = ro, optional = yes;
SYSCHK: load = SYSCHKCHNK, type = rw, define = yes, optional = yes;
SYSCHKTRL: load = SYSCHKTRL, type = ro, optional = yes;
MAINHDR: load = MAINHDR, type = ro;
STARTUP: load = RAM, type = ro, define = yes;
LOWCODE: load = RAM, type = ro, define = yes, optional = yes;
INIT: load = RAM, type = ro, optional = yes;
CODE: load = RAM, type = ro, define = yes;
RODATA: load = RAM, type = ro;
DATA: load = RAM, type = rw;
BSS: load = RAM, type = bss, define = yes;
ZEROPAGE: load = ZP, type = zp;
EXTZP: load = ZP, type = zp, optional = yes;
AUTOSTRT: load = TRAILER, type = ro;
OVERLAY1: load = OVL1, type = ro, define = yes, optional = yes;
OVERLAY2: load = OVL2, type = ro, define = yes, optional = yes;
OVERLAY3: load = OVL3, type = ro, define = yes, optional = yes;
OVERLAY4: load = OVL4, type = ro, define = yes, optional = yes;
OVERLAY5: load = OVL5, type = ro, define = yes, optional = yes;
OVERLAY6: load = OVL6, type = ro, define = yes, optional = yes;
OVERLAY7: load = OVL7, type = ro, define = yes, optional = yes;
OVERLAY8: load = OVL8, type = ro, define = yes, optional = yes;
OVERLAY9: load = OVL9, type = ro, define = yes, optional = yes;
}
FEATURES {
CONDES: type = constructor,

48
cfg/atari.cfg
View File

@ -1,28 +1,44 @@
FEATURES {
STARTADDRESS: default = $2E00;
STARTADDRESS: default = $2000;
}
SYMBOLS {
__STACKSIZE__: type = weak, value = $0800; # 2k stack
__STARTADDRESS__: type = export, value = %S;
__RESERVED_MEMORY__: type = weak, value = $0000;
syschk: type = import; # force inclusion of SYSCHK
}
MEMORY {
ZP: file = "", define = yes, start = $0082, size = $007E;
HEADER: file = %O, start = $0000, size = $0006;
RAM: file = %O, start = %S, size = $BC20 - __STACKSIZE__ - %S;
TRAILER: file = %O, start = $0000, size = $0006;
ZP: file = "", define = yes, start = $0082, size = $007E;
# file header, just $FFFF
HEADER: file = %O, start = $0000, size = $0002;
# "system check" load chunk
SYSCHKHDR: file = %O, start = $0000, size = $0004;
SYSCHKCHNK: file = %O, start = $2E00, size = $0300;
SYSCHKTRL: file = %O, start = $0000, size = $0006;
# "main program" load chunk
MAINHDR: file = %O, start = $0000, size = $0004;
RAM: file = %O, define = yes, start = %S, size = $BC20 - __STACKSIZE__ - __RESERVED_MEMORY__ - %S;
TRAILER: file = %O, start = $0000, size = $0006;
}
SEGMENTS {
EXEHDR: load = HEADER, type = ro;
STARTUP: load = RAM, type = ro, define = yes;
LOWCODE: load = RAM, type = ro, define = yes, optional = yes;
INIT: load = RAM, type = ro, optional = yes;
CODE: load = RAM, type = ro, define = yes;
RODATA: load = RAM, type = ro;
DATA: load = RAM, type = rw;
BSS: load = RAM, type = bss, define = yes;
ZEROPAGE: load = ZP, type = zp;
EXTZP: load = ZP, type = zp, optional = yes;
AUTOSTRT: load = TRAILER, type = ro;
EXEHDR: load = HEADER, type = ro;
SYSCHKHDR: load = SYSCHKHDR, type = ro, optional = yes;
SYSCHK: load = SYSCHKCHNK, type = rw, define = yes, optional = yes;
SYSCHKTRL: load = SYSCHKTRL, type = ro, optional = yes;
MAINHDR: load = MAINHDR, type = ro;
STARTUP: load = RAM, type = ro, define = yes;
LOWCODE: load = RAM, type = ro, define = yes, optional = yes;
INIT: load = RAM, type = ro, optional = yes;
CODE: load = RAM, type = ro, define = yes;
RODATA: load = RAM, type = ro;
DATA: load = RAM, type = rw;
BSS: load = RAM, type = bss, define = yes;
ZEROPAGE: load = ZP, type = zp;
EXTZP: load = ZP, type = zp, optional = yes;
AUTOSTRT: load = TRAILER, type = ro;
}
FEATURES {
CONDES: type = constructor,

2
libsrc/atari/crt0.s
View File

@ -34,9 +34,7 @@
.word $FFFF
.ifdef __ATARIXL__
.segment "MAINHDR"
.endif
.word __STARTUP_LOAD__
.word __BSS_LOAD__ - 1

138
libsrc/atari/system_check.s
View File

@ -1,11 +1,14 @@
;
; Atari XL startup system check
; Atari startup system check
;
; This routine gets loaded prior to the main part of the executable
; and checks if the system is compatible to run the program.
; It checks whether the system is an XL type one and that enough
; memory is installed (which isn't the case for a 600XL).
; If the system doesn't qualify, the loading of the main program
; For the XL target it checks whether the system is an XL type one
; and that enough memory is installed (which isn't the case for a 600XL).
; For the non-XL target it checks whether there is enough memory
; installed to run the program.
; For both target it checks that the program won't load below MEMLO.
; If one of the checks fails the loading of the main program
; is aborted by jumping to DOSVEC.
;
; Christian Groessler, chris@groessler.org, 2013
@ -13,11 +16,14 @@
;DEBUG = 1
.ifdef __ATARIXL__
.export syschk
.import __SYSCHK_LOAD__
.import __STARTADDRESS__ ; needed by xlmemchk.inc
.import __STARTADDRESS__
; the following imports are only needed for the 'atari' target version
.import __BSS_SIZE__, __BSS_RUN__
.import __STACKSIZE__
.import __RESERVED_MEMORY__
.include "zeropage.inc"
.include "atari.inc"
@ -59,25 +65,26 @@ cont: ldx #0 ; channel 0
; ------------------------------------------------------------------------
; Chunk header
.segment "SYSCHKHDR"
.word __SYSCHK_LOAD__
.word end - 1
; ------------------------------------------------------------------------
; Actual code
; code
.segment "SYSCHK"
.ifdef __ATARIXL__
lmemerrxl_txt:
.byte "Not enough memory to move screen", ATEOL
.byte "memory to low memory. Consider using", ATEOL
.byte "a higher load address.", ATEOL
lmemerrxl_txt_len = * - lmemerrxl_txt
; no XL machine
no_xl: print_string "This program needs an XL machine."
jmp fail
; entry point
syschk:
lda $fcd8 ; from ostype.s
; ***** entry point (atarixl) *****
syschk: lda $fcd8 ; from ostype.s
cmp #$a2
beq no_xl
@ -86,11 +93,7 @@ syschk:
cmp #$80
bcs sys_ok
; not enough memory
print_string "Not enough memory."
fail: jsr delay
jmp (DOSVEC)
jmp mem_err
sys_ok:
.include "xlmemchk.inc" ; calculate lowest address we will use when we move the screen buffer down
@ -102,11 +105,63 @@ sys_ok:
sbc lowadr+1
bcc memlo_ok
; load address was too low
print_string2 lmemerrxl_txt, lmemerrxl_txt_len
jsr delay ; long text takes longer to read, give user additional time
jmp fail
.else ; above 'atarixl', below 'atari'
.define CIOV_org CIOV ; the print_string macros use CIOV_org, map this to CIOV
lmemerr_txt:
.byte "Program would load below MEMLO.", ATEOL
.byte "Consider using a higher load address.", ATEOL
lmemerr_txt_len = * - lmemerr_txt
; ***** entry point (atari) *****
syschk:
sec
lda MEMTOP
sbc #<__RESERVED_MEMORY__
sta tmp
lda MEMTOP+1
sbc #>__RESERVED_MEMORY__
sta tmp+1
lda tmp
sec
sbc #<__STACKSIZE__
sta tmp
lda tmp+1
sbc #>__STACKSIZE__
sta tmp+1
;tmp contains address which must be above .bss's end
sec
lda tmp
sbc #<(__BSS_RUN__ + __BSS_SIZE__)
lda tmp+1
sbc #>(__BSS_RUN__ + __BSS_SIZE__)
bcc mem_err ; program doesn't fit into memory
sec
lda MEMLO
sbc #<__STARTADDRESS__
lda MEMLO+1
sbc #>__STARTADDRESS__
bcc memlo_ok
; load address was too low
print_string2 lmemerr_txt, lmemerr_txt_len
jsr delay ; long text takes longer to read, give user additional time
jmp fail
.endif
; all is well(tm), launch the application
memlo_ok:
.ifdef DEBUG
@ -115,36 +170,45 @@ memlo_ok:
.endif
rts
lmemerr_txt:
.byte "Not enough memory to move screen", ATEOL
.byte "memory to low memory. Consider using", ATEOL
.byte "a higher load address.", ATEOL
lmemerr_txt_len = * - lmemerr_txt
; not enough memory
mem_err:print_string "Not enough memory."
fail: jsr delay
jmp (DOSVEC)
; short delay
.proc delay
lda #10
l: jsr delay1
@loop: jsr delay1
clc
sbc #0
bne l
bne @loop
rts
delay1: ldx #0
ldy #0
loop: dey
bne loop
@loop: dey
bne @loop
dex
bne loop
bne @loop
rts
.endproc
end:
.ifndef __ATARIXL__
tmp: ; outside of the load chunk, some kind of poor man's .bss
.endif
; ------------------------------------------------------------------------
; Chunk header
.segment "SYSCHKHDR"
.word __SYSCHK_LOAD__
.word end - 1
; ------------------------------------------------------------------------
; Chunk "trailer" - sets INITAD
@ -153,5 +217,3 @@ end:
.word INITAD
.word INITAD+1
.word syschk
.endif ; .ifdef __ATARIXL__