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swskit-hacks/vfuconvert.mac
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;<LONGO.MACRO>VFUCONVERT.MAC.18 20-Nov-84 16:32:40, Edit by LONGO
;Edit 4 - Clean up putbyt routine
;<LONGO.MACRO>VFUCONVERT.MAC.17 20-Nov-84 12:51:17, Edit by LONGO
;Edit 3 - On error, close and expunge the output file. Also change
; flag indicating first or second output byte to be a bit in AC 0 (f).
;<LONGO.MACRO>VFUCONVERT.MAC.16 16-Nov-84 07:32:11, Edit by LONGO
;Edit 2 - Change wording on question for "switch defines LPI"
;<LONGO.MACRO>VFUCONVERT.MAC.12 9-Nov-84 15:07:17, Edit by LONGO
;Edit 1 - Since LP27s don't allow LPI to be specified in the VFU, add
; code to allow user to convert 6 or 8 LPI to "switch defines LPI".
title VFUConvert - Converts TOPS-10 VFUs to TOPS-20 Format
subttl R. Longo 11/4/84
search monsym,macsym
.require sys:macrel
sall
; Accumulator definitions
stdac. ;use standard ACs
; Version number definitions
; 1(4)-1 20-Nov-84 Cleanup code in putbyt routine. - RAL
; 1(3)-1 20-Nov-84 On error, set CZ%ABT bit when closing output
; file so it will get expunged. Also change
; flag for first/second output byte to be a bit
; the the flag register rather. - RAL
; 1(2)-1 16-Nov-84 Change wording in question that asks if user
; wants to force LPI to be "switch defines LPI"
; in output file. - RAL
; 1(1)-1 9-Nov-84 Added conditional code to allow Lines-per-Inch
; to be forced to be "switch defines" in output
; file. - RAL
; 1(0)-1 4-Nov-84 Program written - RAL
vmajor==1 ;major version of program
vminor==0 ;minor version number
vedit==4 ;edit number
vwho==1 ;group who last edited program
; (0=DECdevelopment, 1=SWS, 2-7=Cust)
pgver. vmajor,vminor,vedit,vwho ;create version number
ifndef strip,<
strip==1 ;[1]1=assemble strip LPI code
>;[1]end ifndef strip
ifn strip,<bufsiz==^d80> ;[1]number of bytes to allow for user input
pdlen==^d50 ;push-down stack length
fr%put==1b34 ;[3]0=outputting first byte, 1=second byte
fr%err==1b35 ;[3]0=normal termination, 1=an error occurred
if2,<printx [Remember to save as VFUCONVERT]>
subttl MAIN PROGRAM
start: RESET%
move p,[iowd pdlen, pdl] ;set up stack
txz f,fr%err!fr%put ;[3]clear flags
tmsg <This program makes a TOPS-20 VFU from a TOPS-10 VFU.>
; Open the input file
opninp: tmsg <
Input (TOPS-10) file: >
movx t1,GJ%SHT!GJ%OLD!GJ%MSG!GJ%CFM!GJ%FNS
move t2,[xwd .PRIIN,.PRIOU] ;input and output to the terminal
GTJFN%
erjmp [ jserr
jrst opninp]
hrrzm t1,jfnin ;save the JFN
movx t2,fld(7,OF%BSZ)!OF%RD
OPENF%
ermsg <OPENF input>
; Open the output file
tmsg <Output (TOPS-20) file: >
movx t1,GJ%SHT!GJ%NEW!GJ%FOU!GJ%MSG!GJ%CFM!GJ%FNS
move t2,[xwd .PRIIN,.PRIOU] ;input and output to the terminal
GTJFN%
ermsg <GTJFN output>
hrrzm t1,jfnout ;save the JFN
movx t2,fld(^d16,OF%BSZ)!OF%RD!OF%WR
OPENF%
ermsg <OPENF output>
ifn strip,< ;[1]
; Ask if output VFU should have LPI set or not
setzm nolpi ;[1]default is no strip
ask: hrroi t1,prompt ;[1]
PSOUT% ;[1]
hrroi t1,inbuf ;[1]
movx t2,RD%RAI!bufsiz*5 ;[1]bytes=words*5(char/word)
hrroi t3,prompt ;[1]^R pointer
RDTTY% ;[1]get answer from user
ermsg <RDTTY> ;[1]
ldb t1,[point 7,inbuf,6] ;[1]get the first character of user's input
cain t1,"Y" ;[1]is it a 'Y'?
jrst yes ;[1] yes
caie t1,"N" ;[1]no. Could it be an 'N'?
jrst [ tmsg <Answer either Yes or No please.
> ;[1]
jrst ask] ;[1] no. Wrong on both accounts.
skipa ;[1]answer was no.
yes: setom nolpi ;[1]flag so we strip LPI later
>;[1]end of ifn strip
; Convert the TOPS-10 Lines Per Inch byte to equivalent TOPS-20 LPI byte
move t1,jfnin
BIN%
ermsg <BIN on LPI>
move t1,t2 ;put byte read in t1
setz t2, ;start at a known state
cain t1,25 ;Switch defines LPI?
movei t2,356 ; yes
cain t1,26 ;6 LPI?
movei t2,354 ; yes
cain t1,27 ;8 LPI?
movei t2,355 ; yes
skipn t2 ;was a correct LPI byte seen?
jrst [ tmsg <?Lines per inch byte in input file is not correct>
txo f,fr%err ;[3] no, mark that an error has occurred
jrst endit] ; and quit
ifn strip,< ;[1]
skipe nolpi ;[1]strip LPI byte?
movei t2,356 ;[1] yes, convert to "switch defines"
>;[1]end of ifn strip
call putbyt ;yes, go output the byte
; Convert the meat of the VFUs
cnvlop: move t1,jfnin
BIN%
ermsg <BIN in conversion loop>
caie t2,126 ;end byte?
jrst [ call putbyt ; no, output the byte as is
jrst cnvlop] ;back for more
movei t2,357 ;change TOPS-10 end byte to TOPS-20 end byte
call putbyt ;output TOPS-20 end byte
txne f,fr%put ;[3]output an even number of bytes?
jrst [ tmsg <?Did not output an even number of bytes>
txo f,fr%err ;[3]mark that an error has occurred
jrst endit] ; and quit
; All done. Close files and quit
endit: move t1,jfnin
CLOSF%
erjmp .+1 ;ignore errors
move t1,jfnout
txne f,fr%err ;[3]did we see an error?
txo t1,CZ%ABT ;[3] yes, output file gets expunged
CLOSF%
erjmp .+1 ;ignore errors
HALTF%
jrst start ;for continue
subttl SUBROUTINES
; Routine to output bytes to the TOPS-20 VFU file
; This routine is called with a 7-bit byte in t2. It saves the byte on
; the first call until the second time it is called, at which time it
; outputs a 16-bit byte consisting of the two 7-bit bytes swapped.
putbyt: txcn f,fr%put ;[3]skip if this is the second byte
jrst [ movem t2,byte2 ;[4] first byte, save it
ret] ;[4] and just return
hrrz t1,jfnout
lsh t2,^d8 ;move this byte over
ior t2,byte2 ;put in the first byte
BOUT% ;output the 16-bit byte
ermsg <BOUT>
ret ;return
subttl MISC DATA STORAGE
; Misc data storage
pdl: block pdlen ;push down pointer
ifn strip,< ;[1]
inbuf: block bufsiz ;[1]text for yes/no answer
prompt: asciz/
Due to a hardware restriction, VFUs for LP27 printers must be built
with the lines-per-inch set to "left alone" (switch defines LPI).
Should the lines-per-inch be forced to be "left alone" in the output
file? / ;[2]
nolpi: block 1 ;[1]0=don't convert LPI to "switch defines"
>;[1]end ifn strip
byte2: block 1 ;second byte to output
jfnin: block 1 ;JFN of input file
jfnout: block 1 ;JFN of output file
end start