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dos33fsprogs
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peasant: push qboot stage2 into lores page2 as we won't be using it

This commit is contained in:
Vince Weaver 2021-08-14 15:45:03 -04:00
parent b92cac0665
commit 5077f7eddb
6 changed files with 19 additions and 20 deletions
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2
games/peasant/Makefile
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@ -17,7 +17,7 @@ peasant.dsk: QBOOT QLOAD VID_LOGO TITLE INTRO COPY_CHECK
$(DOS33_RAW) peasant.dsk 1 0 QLOAD 0 0
$(DOS33_RAW) peasant.dsk 3 0 VID_LOGO 0 0
$(DOS33_RAW) peasant.dsk 5 0 TITLE 0 0
$(DOS33_RAW) peasant.dsk 8 0 INTRO 0 0
$(DOS33_RAW) peasant.dsk 8 0 INTRO 0 0
$(DOS33_RAW) peasant.dsk 12 0 COPY_CHECK 0 0
###

11
games/peasant/NOTES
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@ -4,13 +4,12 @@ Memory Map
; notes -- VID_LOGO loads title at $9000 - $AFFF
$00 Zero Page
$01 ???
$02 ???
$03 ???, IRQ vectors
$01 Stack
$02 Disk Lookup
$03 Disk Lookup, IRQ vectors
$04-$07 Text/GR page 1 (not used?)
$08-$0B Text/GR page 2 (not used?)
$0C-$0D ??
$0E-$1F QLOAD disk routines and Mockingboard sound routines here
$08-$0B Text/GR page 2. $08=boot, $09-$0A = qboot stage2
$0B-$1F QLOAD disk routines and Mockingboard sound routines here
$20-$3F HGR Page 1
$40-$5f HGR Page 2
$60-$?? Programs (roughly 22k available?)

10
games/peasant/qboot.inc
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@ -1,9 +1,9 @@
; made by hand?
seek = $d26
driveon = $d9D
driveoff = $d22
load_new = $dAB
load_address=$dC4
seek = $a26
driveon = $a9D
driveoff = $a22
load_new = $aAB
load_address=$aC4
load_track=load_address+1
load_sector=load_address+2
load_length=load_address+3

12
games/peasant/qboot_sector.s
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@ -40,18 +40,18 @@
.byte 1 ; number of sectors for ROM to load
boot_entry:
; this code loads two sectors up to $C0/$D0
; this code loads two sectors up to $09/$0A
; assume A=1 coming in here
lsr ; check sector number
; A=0, carry=1
tay ; Y=0
adc #$0B ; A=$C (destintation)
adc #$08 ; A=$9 (destintation)
sta $27 ; set or update address as needed
cmp #$0E
; so if hit $0e00 we are done
cmp #$0B
; so if hit $0b00 we are done
beq done_load_2 ; branch if loaded 2
@ -234,9 +234,9 @@ end_code:
.res $8fe-*
; traditionally, entry point to jump to at end of loading
; $c00 in this case
; $900 in this case
;*=$8fe
.byte $C, $00
.byte $9, $00
.include "qboot_stage2.s"

2
games/peasant/qboot_stage2.s
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@ -13,7 +13,7 @@
WAIT = $FCA8 ;; delay 1/2(26+27A+5A^2) us
.org $c00
.org $900
code_begin:

2
linker_scripts/apple2_900.inc
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@ -4,7 +4,7 @@ MEMORY {
}
SEGMENTS {
CODE: load = RAM, type = ro;
CODE: load = RAM, type = ro, align = $100;
RODATA: load = RAM, type = ro;
DATA: load = RAM, type = rw;
BSS: load = RAM, type = bss, define = yes;