fx80.cvt
starnx10.cvt

Geos Printer Drivers which support USER PORT connection.
  Connection cable looks like this:
	c64            	Printer
	pb0..pb7	d0..d7
 	?		STROBE
	?		ACK
	
? - find out from asm source!

;----------GeosPrinterDriver------------
;-------------Star LC-20----------------
;(c)1993 Commodore Cracker v1.0
;---------------------------------------
ack      = $dd0d
strobe   = $dd00
paio     = $dd03
pa       = $dd01
bank     = $01
;---------------------------------------
         *= $7900
;---------------------------------------
         jmp init
         jmp start
         jmp pr_buf
         jmp stop
         jmp get_dim
         jmp pr_asc
         jmp start_asc
         jmp set_nlq
;---------------------------------------
         .text "sTAR lc-20"    ;header
         .byte 0,0,0,0,0,0,0,0,0,0
         .byte 0,0,0,0
;---------------------------------------
         lda #$ff
         sta paio
         lda #0   
         sta pa
	 rts
;---------------------------------------
write    sta pa
         lda strobe
         and #$fb
         sta strobe
         ora #$04
         sta strobe
         ldx #$ff
loop     dex
         beq time_out
         lda ack
         and #$10
         beq loop
	 ldx #0
	 rts
;---------------------------------------
time_out ldx #1
         jmp set_old
;---------------------------------------

Enjoy this great drivers!
(klampar@elf.stuba.sk)