Routines
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1C22: telesoftware_main: Main telesoftware interface loop.
telesoftware_main 1C22 LD SP,$5BFA Set stack pointer above temporary_stack.
1C25 CALL buffers_in_screen Position receive buffer and page display buffer in screen RAM.
1C28 LD DE,telesoftware_message Copy telesoftware_message to header in new page display buffer.
1C2B CALL write_header_message
1C2E CALL telesoftware_number Get page number from user.
This entry point is used by the routine at display_message.
start_download 1C31 XOR A Set A to zero (black border).
page_loop 1C32 CALL border_flash Flash border colour in A.
1C35 CALL wait_for_page Wait for page to load.
1C38 OR A If page loaded jump to page_loaded.
1C39 JR Z,page_loaded
1C3B LD DE,break_message Else if enter pressed set DE to break_message and jump to display_message.
1C3E CP $01
1C40 JP Z,display_message
1C43 LD DE,no_page_message Else page timed out, set DE to no_page_message and jump to display_message.
1C46 JP display_message
page_loaded 1C49 CALL check_footer Call check_footer.
1C4C OR A If return value is $00 jump to telesoftware_main_0.
1C4D JR Z,telesoftware_main_0
1C4F LD DE,not_data_message Else if $01 set DE to not_data_message and jump to display_message.
1C52 CP $01
1C54 JP Z,display_message
1C57 LD DE,bad_page_message Else if $02 set DE to bad_page_message and jump to display_message.
1C5A CP $02
1C5C JP Z,display_message
1C5F LD A,$04 Else set A to $04 (green) and jump back to page_loop.
1C61 JP page_loop
telesoftware_main_0 1C64 CALL check_page Call check_page.
1C67 OR A If return value is $00 (ok) jump to telesoftware_main_1.
1C68 JR Z,telesoftware_main_1
1C6A CP $01 If return value is $01 (error) set A to $02 (red) and jump back to page_loop else set DE to bad_page_message and jump to display_message.
1C6C LD DE,bad_page_message
1C6F JP NZ,display_message
1C72 LD A,$02
1C74 JP page_loop
telesoftware_main_1 1C77 CALL download_data Call download_data.
1C7A CALL block_downloaded Call block_downloaded.
1C7D OR A If return value is $00 set A to $07 (white) and jump back to page_loop else jump to download_complete.
1C7E JP NZ,download_complete
1C81 LD A,$07
1C83 JP page_loop
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