153 lines
2.4 KiB
ArmAsm
153 lines
2.4 KiB
ArmAsm
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_BASIC_0)
|
|
|
|
// LIST basic text.
|
|
// XXX - Does not currently support line number ranges
|
|
|
|
cmd_list:
|
|
|
|
// Set current line pointer to start of memory
|
|
jsr init_oldtxt
|
|
|
|
list_loop:
|
|
|
|
ldy #1
|
|
|
|
#if CONFIG_MEMORY_MODEL_60K
|
|
ldx #<OLDTXT+0
|
|
jsr peek_under_roms
|
|
cmp #$00
|
|
#else // CONFIG_MEMORY_MODEL_38K
|
|
lda (OLDTXT),y
|
|
#endif
|
|
|
|
bne list_more_lines
|
|
|
|
// LIST terminates any running program,
|
|
// because it has fiddled with the current line pointer.
|
|
// (Confirmed by testing on a C64)
|
|
jmp basic_main_loop
|
|
|
|
list_more_lines:
|
|
lda STKEY
|
|
bmi !+
|
|
jmp cmd_stop
|
|
!:
|
|
jsr list_single_line
|
|
// Now link to the next line
|
|
jsr basic_find_next_line
|
|
jmp list_loop
|
|
|
|
list_single_line: // entry point needed by DOS wedge
|
|
// Print line number
|
|
ldy #3
|
|
|
|
#if CONFIG_MEMORY_MODEL_60K
|
|
jsr peek_under_roms
|
|
#else // CONFIG_MEMORY_MODEL_38K
|
|
lda (OLDTXT),y
|
|
#endif
|
|
|
|
pha
|
|
dey
|
|
|
|
#if CONFIG_MEMORY_MODEL_60K
|
|
jsr peek_under_roms
|
|
#else // CONFIG_MEMORY_MODEL_38K
|
|
lda (OLDTXT),y
|
|
#endif
|
|
|
|
tax
|
|
pla
|
|
jsr print_integer
|
|
jsr print_space
|
|
|
|
// Iterate through printing out the line
|
|
// contents
|
|
lda #0
|
|
sta QTSW
|
|
|
|
ldy #4
|
|
list_print_loop:
|
|
|
|
#if CONFIG_MEMORY_MODEL_60K
|
|
ldx #<OLDTXT
|
|
jsr peek_under_roms
|
|
cmp #$00
|
|
#else // CONFIG_MEMORY_MODEL_38K
|
|
lda (OLDTXT),y
|
|
#endif
|
|
|
|
beq list_end_of_line
|
|
cmp #$22
|
|
bne list_not_quote
|
|
lda QTSW
|
|
eor #$FF
|
|
sta QTSW
|
|
lda #$22
|
|
jmp list_is_literal
|
|
|
|
list_not_quote:
|
|
// Check quote mode, and display as literal if required
|
|
ldx QTSW
|
|
bne list_is_literal
|
|
|
|
cmp #$FF
|
|
beq list_is_pi
|
|
|
|
cmp #$7F
|
|
bcc list_is_literal
|
|
|
|
// Display a token
|
|
|
|
// Save registers
|
|
tax
|
|
pha
|
|
phy_trash_a
|
|
|
|
// Get pointer to compressed keyword list
|
|
lda #<packed_keywords
|
|
sta FRESPC+0
|
|
lda #>packed_keywords
|
|
sta FRESPC+1
|
|
|
|
// Subtract $80 from token to get offset in word
|
|
// list
|
|
txa
|
|
and #$7f
|
|
tax
|
|
|
|
// Now ask for it to be printed
|
|
ldy #$ff
|
|
jsr packed_word_search
|
|
|
|
ply_trash_a
|
|
pla
|
|
|
|
cmp #$8f
|
|
bne list_not_rem
|
|
// REM command locks quote flag on until the end of the line, allowing
|
|
// funny characters in REM statements without problem.
|
|
sta QTSW // Any value other than $00 or $FF will lock quote mode on, so the token value of REM is fine here
|
|
// FALL THROUGH
|
|
list_not_rem:
|
|
|
|
iny
|
|
bne list_print_loop // branch always
|
|
|
|
list_is_pi:
|
|
lda #$7E
|
|
|
|
// FALLTROUGH
|
|
|
|
list_is_literal:
|
|
jsr JCHROUT
|
|
iny
|
|
bne list_print_loop
|
|
|
|
list_end_of_line:
|
|
// Print end of line
|
|
jmp print_return
|
|
|
|
|
|
#endif // ROM layout
|