Apple-2-SW
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dos33fsprogs
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ootw: loader: move around to free up some room

This commit is contained in:
Vince Weaver 2019-03-01 11:40:39 -05:00
parent ffd36a8dd4
commit cf0a992d25
4 changed files with 19 additions and 10 deletions
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12
linker_scripts/apple2_1400.inc Normal file
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@ -0,0 +1,12 @@
MEMORY {
ZP: start = $00, size = $1A, type = rw;
RAM: start = $1400, size = $7E00, file = %O;
}
SEGMENTS {
CODE: load = RAM, type = ro, align=$100;
RODATA: load = RAM, type = ro;
DATA: load = RAM, type = rw;
BSS: load = RAM, type = bss, define = yes;
ZEROPAGE: load = ZP, type = zp;
}

4
ootw/Makefile
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@ -9,7 +9,7 @@ all: ootw.dsk
ootw.dsk: HELLO LOADER INTRO OOTW OOTW_C2 COMPRESS-TEST
$(DOS33) -y ootw.dsk SAVE A HELLO
$(DOS33) -y ootw.dsk BSAVE -a 0x1800 LOADER
$(DOS33) -y ootw.dsk BSAVE -a 0x1400 LOADER
$(DOS33) -y ootw.dsk BSAVE -a 0x2000 INTRO
$(DOS33) -y ootw.dsk BSAVE -a 0x2000 OOTW
$(DOS33) -y ootw.dsk BSAVE -a 0x2000 OOTW_C2
@ -89,7 +89,7 @@ intro.o: intro.s \
####
LOADER: loader.o
ld65 -o LOADER loader.o -C ../linker_scripts/apple2_1800.inc
ld65 -o LOADER loader.o -C ../linker_scripts/apple2_1400.inc
loader.o: loader.s
ca65 -o loader.o loader.s -l loader.lst

9
ootw/README
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@ -25,12 +25,9 @@ Memory map:
02-03
04-07 GR page0
08-0b GR page1
0c-0f offscreen data
0c-0f offscreen data ($c00 = disk load buffer)
10-13 offscreen data2
14-17 *****************free???
18-1c loader
1d loader buffer
1e-1f *****************free???
20-bf program/data (40k)
14-17 loader
18-bf program/data (42k)
c0-cf I/O
d0-ff ROM

4
ootw/loader.s
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@ -27,8 +27,8 @@
tmptrk = $fe ; temporary copy of current track
phase = $ff ; current phase for /seek
dirbuf = $1d00
;$1e00 ; note, don't put this immediately below
dirbuf = $c00
; note, don't put this immediately below
; the value being read as destaddr-4
; is temporarily overwritten during read
; process