wayne@jtids.UUCP (Wayne Phillips) (07/08/86)
EAT THIS SUCKER!!!!
Has anyone seen or know anything about a printer driver for the
Seikosha GP700A color printer!! (originally used with the TI-99 computer)
Also if anyone could supply information about how one goes about
writing a color graphics printer driver (eg. how to interface to the
workbench screen dumper), this would be appreciated also.
Please mail responses to phillips@nadc Arpanet
...!burdvax!jtids!wayne Usenetcarolyn@cbmvax.cbm.UUCP (Carolyn Scheppner) (07/10/86)
In article <138@jtids.UUCP> wayne@jtids.UUCP (Wayne Phillips) writes: > >Also if anyone could supply information about how one goes about >writing a color graphics printer driver (eg. how to interface to the >workbench screen dumper), this would be appreciated also. Rom Kernal manual (our Vol. 2, don't know which Addison-Wesley volume) contains assembler and C source for 4 or 5 printer drivers including two color printers (Okimate and Diablo C-150 color ink jet printer). The render.c portion of a driver is the routine that gets called by the printer device's dumprport routine when the dump command is sent to the device. Read the printer device chapter in the RKM also. Using the Diablo driver as an example, Render(ct, x, y, status) does five different functions according to the status. If status is 0, render allocates its buffer. Status 3 tells render to clear the buffer, status 4 is for freeing the buffer. If status is 1, dumprport is passing pixel info. Dumprport repeatedly calls render until it has passed enough pixel info for one pass of that printer's head. It passes the pixel info as color, xpos, ypos. Render is responsible for taking this info and building a buffer in the correct format for feeding it to its printer. When enough info for one pass of the head has been sent, dumprport calls render with status = 2, signaling render to dump its buffer to the printer. I am attaching the source for Wait.asm which I believe is missing from the driver source in the manual. =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= ********************************************************************** * * wait * ********************************************************************** SECTION printer *------ Included Files ----------------------------------------------- INCLUDE "exec/types.i" INCLUDE "exec/ports.i" INCLUDE "exec/devices.i" INCLUDE "exec/io.i" INCLUDE "devices/timer.i" INCLUDE "devices/prtbase.i" INCLUDE "macros.i" *------ Imported Names ----------------------------------------------- *------ Imported Functions ------------------------------------------- XREF_EXE Forbid XREF_EXE Permit XREF_EXE WaitIO XREF _SysBase XREF _PD *------ Exported Functions ------------------------------------------- XDEF _PWait *------ printer.device/PWait ----------------------------------------- * * NAME * PWait - wait for a time * * SYNOPSIS * PWait(seconds, microseconds); * * FUNCTION * PWait uses the timer device to wait after writes are complete * *--------------------------------------------------------------------- _PWait: MOVEM.L A4/A6,-(A7) MOVE.L _PD,A4 MOVE.L pd_PBothReady(A4),A0 JSR (A0) TST.L D0 BNE.S error LEA pd_TIOR(A4),A1 MOVE.W #TR_ADDREQUEST,IO_COMMAND(A1) MOVE.L 12(A7),IOTV_TIME+TV_SECS(A1) MOVE.L 16(A7),IOTV_TIME+TV_MICRO(A1) CLR.B IO_FLAGS(A1) MOVE.L IO_DEVICE(A1),A6 JSR DEV_BEGINIO(A6) LINKEXE Forbid LEA pd_TIOR(A4),A1 LINKEXE WaitIO LINKEXE Permit MOVEQ #0,D0 TST.L D0 error: MOVEM.L (A7)+,A4/A6 RTS END -- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Carolyn Scheppner -- CBM >>Amiga Technical Support<< UUCP ...{allegra,caip,ihnp4,seismo}!cbmvax!carolyn PHONE 215-431-9180 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=