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menu now works with more than 128 items, also more efficient use of memory, and ability to jump to a particular letter

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git-svn-id: http://svn.code.sf.net/p/netboot65/code@36 93682198-c243-4bdb-bd91-e943c89aac3b
This commit is contained in:
jonnosan 2009-02-01 10:11:21 +00:00
parent 121cf18457
commit d8a871b0ad
1 changed files with 9 additions and 14 deletions
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23
client/inc/menu.i
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@ -10,6 +10,7 @@ first_option_this_page: .res 2
options_shown_this_page: .res 1
options_table_pointer: .res 2
jump_to_prefix: .res 1
last_page_flag: .res 1
.code
@ -98,7 +99,8 @@ select_option_from_menu:
sta current_option
lda first_option_this_page+1
sta current_option+1
lda #0
sta last_page_flag
jsr @move_to_current_option
@ -168,6 +170,7 @@ select_option_from_menu:
lda current_option+1
cmp number_of_options+1
bne :+
inc last_page_flag
jmp @print_instructions_and_get_keypress
:
inc options_shown_this_page
@ -266,25 +269,17 @@ select_option_from_menu:
@forward_one_page:
clc
lda last_page_flag
beq :+
@back_to_first_page:
jmp @display_first_page_of_options
:
lda first_option_this_page
adc #OPTIONS_PER_PAGE
sta first_option_this_page
bcc :+
inc first_option_this_page+1
:
lda first_option_this_page+1
cmp number_of_options+1
beq :+
bcc @back_to_first_page
bcs @not_last_page_of_options
:
lda first_option_this_page
cmp number_of_options
bcc @not_last_page_of_options
@back_to_first_page:
jmp @display_first_page_of_options
@not_last_page_of_options:
jmp @print_current_page