33-tec-exa-blaster-modem-pager-network

33: TEC EXA-Blaster Modem (Pager Network)

Instructions

Connect to each pager and copy EMBER-2's message (file 300) to the screen (#DATA). Then activate all of the pagers at exactly the same time by writing a value to each #PAGE register in the same cycle.

A list of phone numbers for the pagers is available in file 301.

For more information see "Hacker Skills: Modem Control at the Direct Level" in the second issue of the zine.

Solution

XA (global)

GRAB 301
LINK 800
MARK DIAL
COPY -1 #DIAL
COPY 11 T
MARK LOOP
COPY F #DIAL
SUBI T 1 T
TJMP LOOP
COPY 1 M
TEST M = 1
TEST EOF
FJMP DIAL

COPY 2 M
SEEK -9999

MARK DIAL2
COPY -1 #DIAL
COPY 11 T
MARK LOOP2
COPY F #DIAL
SUBI T 1 T
TJMP LOOP2
NOOP
COPY 1 M
TEST EOF
FJMP DIAL2
WIPE

XB (global)

GRAB 300
LINK 800
MARK WRITE
TEST M = 1
FJMP END
LINK 800
MARK LOOP
COPY F #DATA
TEST EOF
FJMP LOOP
LINK -1
COPY 1 M
SEEK -9999
JUMP WRITE

MARK END
WIPE
COPY 141 X
MARK REPL
TEST M = 1
REPL ACTIV
SUBI X 20 X
TEST X = -19
FJMP REPL
HALT

MARK ACTIV
;SUBI X 1 T
COPY X T
;DIVI X 19 X
LINK 800
MARK WAIT
SUBI T 1 T
;ADDI T 1 T
TJMP WAIT
COPY 1 #PAGE

Results

Cycles	Size	Activity
970	58	26