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peasant: properly patch the drive1/drive2 code for slot

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This commit is contained in:
Vince Weaver 2022-01-08 01:10:09 -05:00
parent 2ad94749c6
commit 69f5e0a3b3
5 changed files with 89 additions and 54 deletions
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5
games/peasant/Makefile
View File

@ -80,7 +80,8 @@ qload.o: qload.s qboot.inc \
hgr_copy.s \
gr_offsets.s \
qkumba_popwr.s \
random16.s
random16.s \
drive2.s
ca65 -o qload.o qload.s -l qload.lst
###
@ -116,6 +117,8 @@ qboot.inc: generate_common QBOOT
./generate_common -a 0x000 -s phase_smc qboot_sector.lst >> qboot.inc
./generate_common -a 0x000 -s driveon qboot_sector.lst >> qboot.inc
./generate_common -a 0x000 -s driveoff qboot_sector.lst >> qboot.inc
./generate_common -a 0x000 -s switch_drive1 qboot_sector.lst >> qboot.inc
./generate_common -a 0x000 -s switch_drive2 qboot_sector.lst >> qboot.inc
./generate_common -a 0x000 -s load_new qboot_sector.lst >> qboot.inc
./generate_common -a 0x000 -s load_address qboot_sector.lst >> qboot.inc
echo "load_track=load_address+1" >> qboot.inc

31
games/peasant/drive2.s
View File

@ -1,6 +1,5 @@
; roughly based on anti-m/anti-m.a
; Notes from qkumba/4am
; Drive with no disk and no motor, will return same value in range $00..$7f
@ -9,13 +8,12 @@
; so the best way to detect if disk is there is to try seeking/reading
; and seeing if you get valid data
; FIXME: patch these
.if 0
switch_drive1:
lda curtrk_smc+1
sta DRIVE2_TRACK ; save track location
lda $C0EA ; drive 1 select
slotpatch10:
lda $C0d1 ; drive 1 select
lda #1
sta CURRENT_DRIVE
lda DRIVE1_TRACK ; restore saved track location
@ -25,12 +23,14 @@ switch_drive1:
switch_drive2:
lda curtrk_smc+1
sta DRIVE1_TRACK ; save track location
lda $C0EB ; drive 2 select
slotpatch11:
lda $C0d1 ; drive 2 select
lda #2
sta CURRENT_DRIVE
lda DRIVE2_TRACK ; restore saved track location
sta curtrk_smc+1
rts
.endif
;=================================
; check floppy in drive2
@ -48,13 +48,7 @@ check_floppy_in_drive2:
jsr switch_drive2
jsr driveon
; lda $C0E9 ; motor on 1110 1001
; jsr spinup ; spin up drive
; jsr seek_track0 ; seek to track0
jsr driveon ; turn drive on
; seek to track 0
@ -88,7 +82,8 @@ check_drive2_loop:
keep_trying:
get_valid_byte:
lda $C0EC ; read byte
; lda $C0EC ; read byte
jsr readnib
bpl get_valid_byte ; keep trying if high bit not set
check_if_d5:
@ -96,13 +91,15 @@ check_if_d5:
bne check_drive2_loop ; if not, try again
check_if_aa:
lda $C0EC ; read byte
; lda $C0EC ; read byte
jsr readnib
bpl check_if_aa ; keep trying until valid
cmp #$AA ; see if aa
bne get_valid_byte ; if not try again
check_if_96:
lda $C0EC ; read byte
; lda $C0EC ; read byte
jsr readnib
bpl check_if_96 ; keep trying until valid
cmp #$96 ; see if 96
bne check_if_d5 ; if not try again
@ -115,5 +112,3 @@ done_check:
jmp switch_drive1 ; tail call

2
games/peasant/qboot.inc
View File

@ -3,6 +3,8 @@ curtrk_smc =$0a2b
phase_smc =$0a31
driveon =$0a9d
driveoff =$0a22
switch_drive1 =$08af
switch_drive2 =$08c1
load_new =$0aab
load_address =$0ac4
load_track=load_address+1

37
games/peasant/qboot_sector.s
View File

@ -1,6 +1,8 @@
; fast seek/multi-read
; copyright (c) Peter Ferrie 2015-16
.include "zp.inc"
; Paramaters for loading QLOAD
sectors = 21 ; user-defined
@ -22,7 +24,7 @@
znibble = $fe ; only during init
zmask = $ff ; only during init
WHICH_SLOT = $DA
; WHICH_SLOT = $DA
; $26/$27 sector read location (ROM)
; $3D sector number (ROM)
@ -110,6 +112,17 @@ patch_loop:
eor #9 ; PHASEOFF (c080)
sta slotpatch8+1
; patch self-modifying code for disk1
ora #$A ; (C08A)
sta slotpatch10+1
; patch self-modifying code for disk2
ora #$1 ; (C08B)
sta slotpatch11+1
;========================
; ???
ldx #$3f
stx zmask
inx
@ -227,6 +240,28 @@ preread:
ldy #firstsec
rts
switch_drive1:
lda curtrk_smc+1
sta DRIVE2_TRACK ; save track location
slotpatch10:
lda $C0d1 ; drive 1 select
lda #1
sta CURRENT_DRIVE
lda DRIVE1_TRACK ; restore saved track location
sta curtrk_smc+1
rts
switch_drive2:
lda curtrk_smc+1
sta DRIVE1_TRACK ; save track location
slotpatch11:
lda $C0d1 ; drive 2 select
lda #2
sta CURRENT_DRIVE
lda DRIVE2_TRACK ; restore saved track location
sta curtrk_smc+1
rts
end_code:

68
games/peasant/qload.inc
View File

@ -1,40 +1,40 @@
load_file =$0b24
sector_write =$0c7f
check_floppy_in_drive2 =$0e0a
check_floppy_in_drive2 =$0de6
requested_sector =$0d17
decompress_lzsa2_fast =$0e49
getsrc_smc =$0f3f
hgr2 =$1845
hgr_make_tables =$15b9
hgr_put_string =$0f4c
restore_bg_1x28 =$1484
hgr_draw_sprite_1x28 =$141d
input_buffer =$1591
hgr_text_box =$162f
hgr_text_box_nosave =$16c6
hgr_partial_restore =$1507
clear_bottom =$181a
hgr_input =$1537
draw_box =$12ce
disp_put_string =$166a
disp_one_line =$167e
invert_smc1 =$0fc4
disp_put_string_cursor =$167a
hgr_put_char_cursor =$0f78
vgi_simple_rectangle =$134f
peasant_text =$1f79
save_menu =$18f8
load_menu =$18ed
location_names_l =$1c25
location_names_h =$1c44
wait_until_keypress =$1e64
random16 =$1e6d
score_points =$1ef2
print_score =$1ea2
update_score =$1ead
speaker_beep =$1f60
speaker_duration =$1f77
speaker_frequency =$1f78
decompress_lzsa2_fast =$0e25
getsrc_smc =$0f1b
hgr2 =$1821
hgr_make_tables =$1595
hgr_put_string =$0f28
restore_bg_1x28 =$1460
hgr_draw_sprite_1x28 =$13f9
input_buffer =$156d
hgr_text_box =$160b
hgr_text_box_nosave =$16a2
hgr_partial_restore =$14e3
clear_bottom =$17f6
hgr_input =$1513
draw_box =$12aa
disp_put_string =$1646
disp_one_line =$165a
invert_smc1 =$0fa0
disp_put_string_cursor =$1656
hgr_put_char_cursor =$0f54
vgi_simple_rectangle =$132b
peasant_text =$1f55
save_menu =$18d4
load_menu =$18c9
location_names_l =$1c01
location_names_h =$1c20
wait_until_keypress =$1e40
random16 =$1e49
score_points =$1ece
print_score =$1e7e
update_score =$1e89
speaker_beep =$1f3c
speaker_duration =$1f53
speaker_frequency =$1f54
hposn_high = $BA00
hposn_low = $BB00
driveoff = $A22