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Crawly Crypt Collection 1
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prg_2dp.s
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Text File
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1985-11-20
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8KB
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212 lines
; Program Name: PRG_2DP.S
; Version 1.004
; Assembly Instructions:
; Assemble in PC-relative mode and save with a TOS extension.
; Execution Note:
; This program invokes custom traps which must be installed by
; TRAPS.PRG and TRAP_10.PRG prior to its execution. Execute this program
; by typing its name on SPEEDTST.TTP's command line.
; But before executing this program, prepare three floppy disks. The
; first should be formatted from the desktop, using the ST formatting
; algorithm. The second should be formatted with a version of DCFORMAT,
; available from ST Informer, 909 NW Starlite Place, Grants Pass, OR 97526,
; (503)476-0071 on disk PDM 188 or PDM 1288. The price of each disk from
; ST Informer is $6.00 for non-subscribers. You can subscribe for $18.00
; per year and get a free disk coupon. I highly recommend a subscription.
; The third disk should be formatted with Dave Small and Dan Moore's
; Twister program available on START magazine's Summer, 1988 issue. You
; can find an order form in any issue of START or phone (800)234-7001.
; Copy PRG_2DP.TOS to each blank disk. Copy SPEEDTST.TTP to each disk.
; Execute SPEEDTST.TTP on each disk in turn, typing PRG_2DP.TOS on its
; command line. Compare the contents of the WRITE_1 and WRITE_2 files of
; each disk to verify that they are identical. Compare the PRG_2DP.DAT file
; on each disk to the others.
; Program Function:
; This program writes data to WRITE_1.DAT, reads WRITE_1.DAT, then
; writes what it has read to WRITE_2.DAT to confirm that it has correctly
; written and read the data declared within the data section of the program.
; SPEEDTST.TTP will report the load and total execution time for this
; program.
; Within the program, the time to write the data to WRITE_1.DAT will be
; calculated and reported; and the time to read the data from WRITE_1.DAT
; will also be calculated and reported; finally, the time to write the data
; to WRITE_2.DAT will be calculated and reported.
; This program is to be used to compare the write to and read from times
; involving three floppy disks, each of which has been formatted with a
; different formatting algorithm.
fetch_load_time:
trap #3 ; Returns value of system clock in D0.
release_excess_memory: ; Also stores after-load time in TRAPS bss.
lea program_end, a0 ; Put "end of program" address in A0.
movea.l 4(a7), a1 ; Put "basepage" address in A1.
trap #6 ; Calculate program size and release memory.
lea stack, a7
print_heading:
lea heading, a0
bsr print_string
fetch_write_start_time:
trap #3
lea write_start_time, a0
move.w d0, (a0)
create_file_1:
move.w #0, -(sp) ; File attribute = read/write.
pea file_1_name ; For WRITE_1.DAT.
move.w #$3C, -(sp) ; Function = f_create = GEMDOS $3C.
trap #1 ; File handle is returned in D0.
addq.l #8, sp
lea file_1_handle, a0 ; Store returned file handle.
move.w d0, (a0)
write_to_file_1:
pea string ; Push address of buffer.
move.l #451, -(sp) ; Number of bytes to write.
move.w d0, -(sp) ; File handle to be written to.
move.w #$40, -(sp) ; GEMDOS function = write.
trap #1
lea $C(sp), sp ; Reposition stack pointer to top of stack.
close_file_1:
move.w file_1_handle, -(sp)
move.w #$3E, -(sp) ; Function = GEMDOS $3E = f_close.
trap #1
addq.l #4, sp
get_end_time:
trap #3
sub.w write_start_time, d0 ; Subtract start time from end time.
ext.l d0 ; Extend to 32 bits
trap #10 ; Convert to milliseconds and print.
set_dta:
pea dta ; dta = address of 44 byte buffer.
move.w #$1A, -(sp) ; GEMDOS function = set dta.
trap #1
addq.l #6, sp
print_read_time_label:
lea read_msg, a0
bsr print_string
fetch_read_start_time:
trap #3
lea read_start_time, a0
move.w d0, (a0)
; NOTE: Reading is so fast, must loop to accumulate enough time to measure.
move.w #99, d3 ; Set up counter for 100 loops.
search_for_file:
move.w #0, -(sp) ; Attribute = normal access.
pea file_1_name ; Name of file to search for.
move.w #$4E, -(sp) ; GEMDOS function = search first.
trap #1
addq.l #8, sp
tst d0
bne.s not_found
read_WRITE_1_DAT:
lea dta, a0
pea buffer
move.l $1A(a0), -(sp) ; Number of bytes to read.
move.w file_1_handle, -(sp) ; File to read.
move.w #$3F, -(sp) ; GEMDOS function = read.
trap #1
lea $C(sp), sp ; Reposition stack pointer.
dbra d3, search_for_file
_get_end_time:
trap #3
sub.w read_start_time, d0 ; Subtract start time from end time.
ext.l d0 ; Extend to 32 bits
trap #10 ; Convert to milliseconds and print.
print_write_time_label:
lea write_msg, a0
bsr print_string
_fetch_write_start_time:
trap #3
lea write_start_time, a0
move.w d0, (a0)
create_file_2:
move.w #0, -(sp) ; File attribute = read/write.
pea file_2_name ; For WRITE_2.DAT.
move.w #$3C, -(sp) ; Function = f_create = GEMDOS $3C.
trap #1 ; File handle is returned in D0.
addq.l #8, sp
lea file_2_handle, a0 ; Store returned file handle.
move.w d0, (a0)
write_to_file_2:
lea dta, a0
pea string ; Push address of buffer.
move.l $1A(a0), -(sp) ; Number of bytes to write.
move.w d0, -(sp) ; File handle to be written to.
move.w #$40, -(sp) ; GEMDOS function = write.
trap #1
lea $C(sp), sp ; Reposition stack pointer to top of stack.
close_file_2:
move.w file_2_handle, -(sp)
move.w #$3E, -(sp) ; Function = GEMDOS $3E = f_close.
trap #1
addq.l #4, sp
_get__end_time:
trap #3
sub.w write_start_time, d0 ; Subtract start time from end time.
ext.l d0 ; Extend to 32 bits
trap #10 ; Convert to milliseconds and print.
not_found:
trap #8 ; Terminate.
print_string:
pea (a0)
move.w #9, -(sp)
trap #1
addq.l #6, sp
rts
data
file_1_name: dc.b 'WRITE_1.DAT',0
file_2_name: dc.b 'WRITE_2.DAT',0
heading: dc.b 'PRG_2DP.TOS Execution Results',$D,$A,$D,$A
dc.b ' Time to create, write and close WRITE_1.DAT: ',0
read_msg dc.b ' Time to read WRITE_1.DAT into buffer 10 times: ',0
write_msg: dc.b ' Time to create, write and close WRITE_2.DAT: ',0
string: dc.b ' This paragraph will be written to a disk file named '
dc.b 'WRITE_1.DAT. The time ',$D,$A
dc.b ' required to write the paragraph will be reported in '
dc.b 'file PRG_2DP.DAT.',$D,$A
dc.b ' Then the contents of WRITE_1.DAT will be read into a '
dc.b 'buffer. The time ',$D,$A
dc.b ' required to read the contents of the file will be '
dc.b 'reported in file ',$D,$A
dc.b ' PRG_2DP.DAT. Finally, the contents of the buffer '
dc.b 'will be written to ',$D,$A
dc.b ' WRITE_2.DAT so that what has been read can be compared '
dc.b 'to what was written.',$D,$A,$1A
; NOTE: The ASCII code for ^Z (control Z) is normally used to mark the end
; of a file so that a program reading the file may look for that mark.
bss
align
file_1_handle: ds.w 1
file_2_handle: ds.w 1
write_start_time: ds.w 1
read_start_time: ds.w 1
dta: ds.b 44
buffer: ds.b 452
ds.l 96
stack: ds.l 0
program_end: ds.l 0
end