

























	       Pascal 3.25 External Reference Specification

		Preliminary - HP Confidential Information

			      _A_u_g_u_s_t _6, _1_9_9_1

		  Hewlett Packard; Colorado Language Lab























			   Pascal 3.25 External
			 Reference Specification











				  - 2 -



			     Preliminary - HP
			 Confidential Information

			      August 6, 1991


























































       PaWS 3.25 Prelim ERS   August 6, 1991			  3



       1.  PPPPaaaassssccccaaaallll 3333....22225555 SSSSyyyysssstttteeeemmmm

       1.1  DDDDeeeessssccccrrrriiiippppttttiiiioooonnnn

       Pascal 3.25 is a minor upgrade  of  the	Pascal	Workstation
       software  for  the  series  200	and series 300 systems. The
       primary objectives of this release are to  add  support	for
       the  new  SPU  models  362,  382  and  385,  and resolve all
       critical and serious defects.

       1.2  HHHHeeeewwwwlllleeeetttttttt----PPPPaaaacccckkkkaaaarrrrdddd  PPPPrrrroooopppprrrriiiieeeettttaaaarrrryyyy

       The information in this ERS is preliminary  and	subject  to
       change.	This  document contains HP proprietary information,
       and should not be  distributed  outside	HP  unless  a  non-
       disclosure agreement has been executed.














































       PaWS 3.25 Prelim ERS   August 6, 1991			  4



       2.  PPPPrrrroooodddduuuucccctttt SSSSttttrrrruuuuccccttttuuuurrrreeee

       2.1  GGGGeeeennnneeeerrrraaaallll IIIInnnnffffoooorrrrmmmmaaaattttiiiioooonnnn

       The PaWS 3.25 release will be supplied with the	same  media
       options	 available   on   the	3.2  release:  single-sided
       minifloppy,  single-sided  microfloppy,	 and   double-sided
       microfloppy.

       It should be noted that only double-sided floppy discs  will
       work  with  the built-in 3.5" floppy drive on the new models
       362 and 382. The correct boot floppy for the new models	362
       and  382  is  the double sided BOOT2: floppy. The 385 should
       boot correctly with either the single or double-sided BOOT2:
       floppy disc.

       The format of the manual set for the standard  product  will
       not  change.  The number of manuals and their titles will be
       the same as used  for  the  3.2	release.  Manuals  will  be
       updated	to include information relating to new features and
       known manual problems will be repaired.

       2.2  DDDDiiiisssscccc CCCChhhhaaaannnnggggeeeessss

       Revision 3.25 will not require any new discs in	either	the
       single-sided or the double sided configurations.

       Changes to single sided media (Options 042, and 044) are  as
       follows:

       BOOT3:

	     1.  Module CRTF has been added to INITLIB.

       Changes to double sided media (Option 045) are as follows:

       BOOT2:

	     1.  Modules CRTF, SCSIDVR and SCSIDISC have been added
		 to INITLIB.

       The module CRTF is the  crt  driver  for  the  new  displays
       available  with the models 362 and 382. SCSIDVR and SCSIDISC
       are needed for booting from the built in 3.5"  floppy  drive
       on these models.

       The required order for modules in the INITLIB file is  given
       in chapter 18 of the "Pascal Workstations System Manual (Vol
       II)".  CRTF should be placed after (or in  place  of)  CRTE,
       and  SCSIDVR  and  SCSIDISC  should  be placed in that order
       before the module LAST.











       PaWS 3.25 Prelim ERS   August 6, 1991			  5



       2.3  MMMMaaaannnnuuuuaaaallllssss

       Other manual changes  relating  to  code  or  manual  defect
       repairs will be done as needed on the appropriate manuals.

       Changes to the PaWS manual set, other than those related  to
       defect repair, are listed below.  Manual changes relating to
       code or manual defect repairs will be done on an  as  needed
       basis.

       PPPPaaaassssccccaaaallll UUUUsssseeeerrrrssss GGGGuuuuiiiiddddeeee


	    ___________________________________________________
	    PPPPaaaaggggeeee  11118888  ,  section  "Booting the Pascal Workstation".
	    Mention correct boot  floppies  for  362  and  382	and
	    series 300 with 98700 controller.

	    In particular, change

	    * If you have a series  300  computer,  find  the  disc
	    labeled BOOT2:

	    to

	    * If you have a series 300 computer, find the disc
	      labeled BOOT2: (double sided BOOT2: if models 362
	      or 382, or BOOT3: if using single-sided floppies
	      and a 98700 graphics controller)

	    ___________________________________________________
	    PPPPaaaaggggeeee  22220000,,,,  22221111  ,,,,22222222	aaaannnndddd 222211113333 : add mention of the BOOT3:
	    floppy.

	    Change

	    BOOT: or BOOT2:

	    to

	    BOOT:, BOOT2: or BOOT3:.

	    ___________________________________________________
	    PPPPaaaaggggeeee  33331111 , add one more note (362/382 3.5" drive floppy
	    limitation) :

	    ___________________________________________________________
				      Note

	    The built-in floppy drive on the models 362 and 382 may
	    only  be  used to initialize and use discs with double-











       PaWS 3.25 Prelim ERS   August 6, 1991			  6



	    sided					   formats.
	    ___________________________________________________________
	    _____________________________________________________
	    PPPPaaaaggggeeee 222211113333 , task reference on booting. Update.

	    Change

	    Use BOOT2: if you have a series 300 computer with  bit-
	    mapped  display,  use  BOOT:  if  you have a series 200
	    computer or are using a  98546A  display  compatibility
	    interface in your series 300 computer.

	    to

	    Use BOOT2: if you have a series 300 computer with  bit-
	    mapped  display,  use  BOOT:  if  you have a series 200
	    computer or are using a  98546A  display  compatibility
	    interface  in  your  series 300 computer, use BOOT3: if
	    you have single-sided floppies and are  using  a  98700
	    graphics controller.


       PPPPaaaassssccccaaaallll WWWWoooorrrrkkkkssssttttaaaattttiiiioooonnnnssss SSSSyyyysssstttteeeemmmm MMMMaaaannnnuuuuaaaallll ((((VVVVoooollll IIII))))

	    No changes to this manual are required.


       PPPPaaaassssccccaaaallll WWWWoooorrrrkkkkssssttttaaaattttiiiioooonnnnssss SSSSyyyysssstttteeeemmmm MMMMaaaannnnuuuuaaaallll ((((VVVVoooollll IIIIIIII))))


	    _____________________________________________________
	    On ppppaaaaggggeeee 11118888----44440000 add after CRTE entry:

	    CRTF     BOOT2:INITLIB     Required for  the  following
	    Series 300's: 362, 382, R362, R382.

	    _____________________________________________________
	    On ppppaaaaggggeeee 11118888----44442222 add after CRTE entry:

	    CRTF Used with the following Series  300's:  362,  382,
	    R362, R382.

	    Also add to CRTF to the list of modules listed  in	the
	    2nd bulleted item.

	    _____________________________________________________
	    On ppppaaaaggggeeee BBBB----22220000 , after the system history entry for 3.24,
	    the system history for 3.25, as follows :

	    PPPPaaaassssccccaaaallll 3333....22225555












       PaWS 3.25 Prelim ERS   August 6, 1991			  7



	    This release adds support for the  Model  362  and	382
	    SPU's,  including  the  built in 3.5" SCSI floppy drive
	    (double sided discs,  medium  and  high  density  discs
	    only), the built in SCSI hard discs, as well as the VGA
	    and 1024x768 medium res displays.

	    Also supported is the 33 Mhz MC68040 385 SPU.


	    NNNNeeeewwww HHHHaaaarrrrddddwwwwaaaarrrreeee

	      * SPU Models 362, 362R, 382, 382R, and 385

	      * 3.5" Built in SCSI Floppy Drive  (on  the  362	and
	    382)

	      * Built in SCSI hard discs (on the 362 and 382)

	    OOOObbbbjjjjeeeecccctttt CCCCooooddddeeee CCCCoooommmmppppaaaattttiiiibbbbiiiilllliiiittttyyyy

	    Pascal 3.25 is generally upward  code  compatible  with
	    3.2  systems.   Note  that	this  may  not	hold if the
	    application contains linked in system modules.

	    SSSSooooffffttttwwwwaaaarrrreeee CCCChhhhaaaannnnggggeeeessss

	     * A new module CRTF has been created to support the
	       VGA and medium res displays available with the 362
	       and 382. This module is present in the BOOT2:
	       INITLIB file for double sided floppy discs and in
	       the BOOT3: INITLIB file for single sided floppy
	       discs.

	     * The DGL Library has been updated to support the new
	       displays (VGA and medium res) available with the
	       models 362 and 382.

	     * The SCSI driver has been enhanced to support the
	       3.5" SCSI floppy drive built in to  the	the  models
	    362
	       and 382. The MEDIAINIT utility has been enhanced to
	       support initialization of discs with the TEAC drive
	       (double sided format options only for medium and
	       high density floppy discs).

	    SSSSyyyysssstttteeeemmmm DDDDiiiissssccccssss

	    The following changes were made:

	    Single-sided discs:












       PaWS 3.25 Prelim ERS   August 6, 1991			  8



	    module CRTF was added to  the  INITLIB  on	the  BOOT3:
	    disc.

	    Double-sided discs:

	    modules SCSIDISC, SCSIDVR, and CRTF were added  to	the
	    INITLIB file on the BOOT2: disc.


       PPPPrrrroooocccceeeedddduuuurrrreeee LLLLiiiibbbbrrrraaaarrrryyyy MMMMaaaannnnuuuuaaaallll

	    Miscellaneous changes add  mention	of  the  two  newly
	    supported displays. In particular :

	    _____________________________________________________
	    On ppppaaaaggggeeee AAAA----44440000 add after the entry for 98550A :

		 362/382 VGA	  290	210   640   480   8   yes
		 382 Medium Res   300	225  1024   768    8	yes
	    _____________________________________________________
	    On ppppaaaaggggeeee AAAA----111111115555 add to lines	with  98550A  (2  lines  of
	    text) :

	    362/382 internal bitmapped displays

	    _____________________________________________________
	    On ppppaaaaggggeeee AAAA----111111116666 after the 98700A entry

	    362/382		      8 		    0...255
	    _____________________________________________________
	    On ppppaaaaggggeeee AAAA----111111117777 add a new matrix with as follows :

	     Operation	|
	     Selector	|  362/382
	     ---------------------------------------
		52	|    yes
		53	|    yes
		54	|    yes
	       250	|    yes
	      1050	|     no
	      1051	|     no
	      1052	|    yes
	      1053	|     no
	      1054	|    yes
	     10050	|    yes

	    _____________________________________________________
	    On	ppppaaaaggggeeee  AAAA----111166660000  add to the line with 'HP 98550A and HP
	    98700A':

	    362/382	  internal	  bitmapped	   displays











       PaWS 3.25 Prelim ERS   August 6, 1991			  9



	    _____________________________________________________
	    On ppppaaaaggggeeee AAAA----111166664444 add to the ENTRY SELECTOR line containing
	    HP 98700A and HP 98550A:

	    362/382	  internal	  bitmapped	   displays
	    _____________________________________________________
	    On ppppaaaaggggeeee AAAA----111166666666  enhance  paragraph  header  '8-Plane  HP
	    98700A and HP 98550A'

	    so that the entire header reads '8-plane HP 98700A,  HP
	    98550A and 362/382 internal bitmapped displays'

	    _____________________________________________________
	    On ppppaaaaggggeeee AAAA----111166669999 add to the table:

		 362/382  VGA	    290    210	  640	 480	.75
	    2.207
		 382 Medium  Res    300    225	 1024	 768	.75
	    3.413

	    _____________________________________________________
	    On ppppaaaaggggeeee AAAA----111188880000 add to the table:

		 362/382  VGA	    290    210	  640	 480	.75
	    2.207
		 382 Medium  Res    300    225	 1024	 768	.75
	    3.413


       GGGGrrrraaaapppphhhhiiiiccccssss TTTTeeeecccchhhhnnnniiiiqqqquuuueeeessss MMMMaaaannnnuuuuaaaallll

	    Miscellaneous  changes  to	assert	that  the  VGA	and
	    medium-res 362/382 displays are now supported with DGL.

	    In particular :

	    _____________________________________________________
	    In	ppppaaaaggggeeee  1111----11112222  paragraph  2 change from (2 places) 'HP
	    98549A, and HP 98700A' to:

	       HP  98549A,  HP	98700A,  and  HP9000  382   Medium-
	    Resolution display

	    _____________________________________________________
	    In	ppppaaaaggggeeee  1111----11112222  paragraph  2 after 'and HP 98550A (with
	    type-ahead buffer removed)' add:

	      ; or 639 and 463 for HP9000 362/382 VGA  (with  type-
	    ahead buffer);
	      ; or 639 and 479 for HP9000 362/382 VGA  (with  type-
	    ahead buffer removed);











       PaWS 3.25 Prelim ERS   August 6, 1991			 10



	    _____________________________________________________
	    In	ppppaaaaggggeeee  1111----11113333  paragraph  4 change from (2 places) 'HP
	    98549A, HP 98700A' to:

	     HP 98549A, HP  98700A,  HP9000  382  Medium-Resolution
	    display

	    _____________________________________________________
	    In ppppaaaaggggeeee 1111----11113333 paragraph 4 after

	      'or 1279/1023 for HP 98548A and HP 98550A' add:

	       or 639/479 for the HP9000 362/382 VGA display;

	    _____________________________________________________
	    In ppppaaaaggggeeee 1111----11113333 paragraph 4 after (on the HP 98548A and HP
	    98550A) add:

	    , or 0.0 through 479/639 = 0.749608764 (on	the  HP9000
	    362/382 VGA display)

	    _____________________________________________________
	    In ppppaaaaggggeeee 2222----2222 ppppaaaarrrraaaaggggrrrraaaapppphhhh 2222 change HP 98549A, HP 98700A to:

		   HP  98549A,	HP  98700A,  HP9000   382   Medium-
	    Resolution display

	    _____________________________________________________
	    In ppppaaaaggggeeee 2222----2222 ppppaaaarrrraaaaggggrrrraaaapppphhhh 2222 after "for the HP 98548A and HP
	    98550A" add:

	    , or 0.0 through 479/639 ~ 0.75 (on the HP9000  362/382
	    VGA display)

	    _____________________________________________________
	    In ppppaaaaggggeeee 5555----2222 ppppaaaarrrraaaaggggrrrraaaapppphhhh 1111 change
			On the	HP  98700  8-plane  and  HP  98550A
	    displays
				  to:

	     On the  HP  98700	8-plane,  HP  98550A,  and  362/382
	    internal color displays

	    _____________________________________________________
	    On ppppaaaaggggeeee 5555----11118888 add to list

		  o HP9000 362/382 VGA color display
		  o HP9000 382 medium resolution color display

	    _____________________________________________________
	    add to GGGGrrrraaaapppphhhhiiiiccccssss TTTTeeeecccchhhhnnnniiiiqqqquuuueeeessss iiiinnnnddddeeeexxxx :











       PaWS 3.25 Prelim ERS   August 6, 1991			 11



			 HP9000 362/382 display

			and have it reference page 5-18.

	    _____________________________________________________
	    change Graphics Techniques sssseeeeccccttttiiiioooonnnn BBBB to show changes as
	    described above in the Procedure Library section A.

	    The pages correspond as follows :

	       Procedure Library	 Graphics Techniques
	      ____________________	_____________________

		  A-40				B-20
		  A-115 			B-71
		  A-116 			B-72
		  A-117 			B-73
		  A-160 			B-90
		  A-164 			B-94
		  A-166 			B-96
		  A-169 			B-100
		  A-180 			B-111



       PPPPeeeerrrriiiipppphhhheeeerrrraaaallll IIIInnnnssssttttaaaallllllllaaaattttiiiioooonnnn GGGGuuuuiiiiddddeeee

	    No changes required for this manual.

       HHHHPPPP PPPPaaaassssccccaaaallll LLLLaaaannnngggguuuuaaaaggggeeee RRRReeeeffffeeeerrrreeeennnncccceeee MMMMaaaannnnuuuuaaaallll

	    No changes required for this manual.






























       PaWS 3.25 Prelim ERS   August 6, 1991			 12



       3.  NNNNeeeewwwwllllyyyy SSSSuuuuppppppppoooorrrrtttteeeedddd PPPPeeeerrrriiiipppphhhheeeerrrraaaallllssss

       3.1  NNNNeeeewwwwllllyyyy SSSSuuuuppppppppoooorrrrtttteeeedddd SSSSCCCCSSSSIIII DDDDiiiissssccccssss

       Five new disks will be supported for  the  first  time  with
       3.25,  all  of which are built-in to the models 362 and 382.
       These disks are :

	       1.) 3.5" floppy drive (double-sided floppies only)
	       2.) 200 Mbyte built-in hard disc
	       3.) 52 Mbyte built-in hard disc
	       4.) 210 Mbyte built-in hard disc
	       5.) 425 Mbyte built-in hard disc


       3.2  SSSSooooffffttttwwwwaaaarrrreeee RRRReeeeqqqquuuuiiiirrrreeeedddd

       To use any supported SCSI Disc, the SCSI bus driver and	the
       SCSI  Disc  Driver  should be placed in INITLIB.  These file
       names are:

	  o+ SCSIDVR and SCSIDISC.

       These files are located on the LIB: disc  for  single  sided
       media  and  on the ACCESS: disc for double sided media. Also
       these modules are present in the INITLIB file on the  double
       sided  BOOT2:  floppy  disc. This is the correct disc to use
       when booting the system with the 3.5" floppy  drive  on	the
       models 362 and 382.

       Once placed in INITLIB, PaWS should be rebooted	to  acquire
       support of SCSI discs.

       Alternatively, the user could execute each  of  these  files
       (which PLOAD themselves), and then execute TABLE.

       The major change involves the 3.5" floppy drive. As this  is
       a  SCSI	device,  the  SCSI  bus  driver and disc driver are
       required to use this drive. This requires  the  SCSIDVR	and
       SCSIDISC modules be present in the INITLIB file when booting
       from this drive, hence the inclusion of these modules in the
       INITLIB file on the double sided BOOT2: floppy disc.

       The 3.5" built in drive supports these format options :

	Option 0 or 1 : 256 byte sectors, 77 cylinders
	Option 2 : 512 byte sectors, 77 cylinders
	Option 3 : 1024 byte sectors, 77 cylinders
	Option 16 : 512 byte sectors, 80 cylinders













       PaWS 3.25 Prelim ERS   August 6, 1991			 13



       These  are  the	only  options  supported  with	this  drive
       (single-sided  floppies	may  not  be initialized or used in
       this drive). Option 0 is the default option when  using	the
       PaWS  MEDIAINIT	program and and is the option used with the
       double sided system discs.

























































       PaWS 3.25 Prelim ERS   August 6, 1991			 14



       4.  CCCCRRRRTTTT DDDDrrrriiiivvvveeeerrrr CCCCRRRRTTTTFFFF

       There will be two new displays supported (SPU models 362 and
       382)  for the first time with 3.25. They are the VGA display
       and also the 75 Mhz medium resolution  1024x768	display.  A
       new  CRT driver (CRTF) is being developed for use with these
       displays.

       4.1  DDDDeeeessssccccrrrriiiippppttttiiiioooonnnn ooooffff NNNNeeeewwww DDDDiiiissssppppllllaaaayyyyssss

       A new display subsystem is used by the  362  and  382.  This
       subsystem  contains  frame  buffer  memory,  a  DAC,  and  a
       controller. The controller controls the communication of the
       backplane  to  the  video RAM and timing. There is no vector
       generating or block mover capabilities with this  subsystem.
       It  is  the responsibility of the software to manipulate all
       screen data. There is a hardware cursor that is designed  to
       be  compatible  with  X/Windowing system.  The new subsystem
       does have one attribute	of  the  old  (CATSEYE)  subsystem,
       however.  An  ID  ROM  is  present  containing configuration
       information and	the  Roman-8  character  set.	This  ROM's
       structure is compatible with the CATSEYE ID ROM.

       The new displays have the following characteristics:

       Type of display	  |	VGA	|   Medium   |	  High*   |
			  |		|	     |		  |
       Screen Width	  |	640	|    1024    |	  1280	  |
       Screen Height	  |	480	|     768    |	  1024	  |
       Character Width	  |	  8	|	8    |	    10	  |
       Character Height   |	 16	|      16    |	    20	  |
       Number of Planes   |	  8	|	8    |	     8	  |
       Refresh Rate	  |    60 Hz	|    75 Hz   |	  72 Hz   |
			  |		|	     |		  |
       Monitor size	  |    14 in	|    16 in   |	  19 in   |

       * Planned - Not available at the time of this writing.


       Although several different resolutions  are  available,	the
       architecture  is  the  same for all resolutions. To simplify
       software design, the frame buffer is constructed  with  each
       line of the display on a 2K byte boundary.



















       PaWS 3.25 Prelim ERS   August 6, 1991			 15



			       FRAME BUFFER LAYOUT

	     0		       639	 1023	    1279       2047
	       ___________________________________________________
	   0  | 		 |	    |	       |	  |
	      | 		 |	    |	       |	  |
	      | 		 |	    |	       |	  |
	      | 		 |	    |	       |	  |
	      |       VGA	 |	    |	       |	  |
	      | 		 |	    |	       |	  |
	      | 		 |	    |	       |	  |
	 479  |__________________|	    |	       |	  |
	      |   vga offscreen area	    |	       |	  |
	 511  |-----------------------------|	       |  high	  |
	      | 			    |	       |resolution|
	      |      MEDIUM RESOLUTION	    |	       |offscreen |
	 767  |_____________________________|	       |  area	  |
	      | 				       |	  |
	      | 				       |	  |
	      |       HIGH RESOLUTION		       |	  |
	 1023 |________________________________________|__________|


       Note that there is offscreen frame buffer  memory  available
       on VGA and High Resolution only. There is no offscreen frame
       buffer memory on the Medium Resolution display.

       The frame buffer is located at DIO-II Select Code 132.  This
       is  at physical address 16M (Hex $1000000). This is the only
       location the this video can reside at.

       The hardware cursor operates as a sprite. This  requires  no
       manipulation  of  the  frame buffer for cursor movement. The
       cursor is actually seperate video RAM that is  displayed  at
       the  same  time	the  framebuffer  is displayed.  The cursor
       position and  color  is	controlled  via  registers  on	the
       WOODCUT	hardware.  The	cursor memory is 64x64 bits in size
       and is two planes deep.	The cursor has a seperate  colormap
       similar	to  the frame buffer colormap.	The only limitation
       is that there is no hardware  blinking  capability  for	the
       cursor.

       4.1.1  _F_u_n_c_t_i_o_n_a_l_i_t_y  To minimize impact to developers,	all
       driver  routines  implemented  in  the  CRTE  driver will be
       implemented  in	the  CRTF  driver.  Functionality  will  be
       duplicated  to  make  the  CRTF driver appear to operate the
       same as the CRTE driver.

       4.1.1.1	_P_e_r_f_o_r_m_a_n_c_e   Scrolling  performance  for  the	new
       hardware  is  rated  at	35  lines/sec  VGA and 26 lines/sec
       Medium Res with a 25Mhz 68040. The CRT driver  will  perform











       PaWS 3.25 Prelim ERS   August 6, 1991			 16



       at  75  percent of these numbers or better.  Screen clearing
       time will be approximately 10 msec for a full screen clear.




























































       PaWS 3.25 Prelim ERS   August 6, 1991			 17



       5.  DDDDGGGGLLLL ffffoooorrrr 3333....22225555

       5.1  CCCChhhhaaaannnnggggeeeessss ttttoooo DDDDGGGGLLLL

       Changes will be made to to utilize the new  video  hardware.
       New  entries will be included in the initialization routines
       containing the following specifications:


				    Greyscale		  Greyscale
		     VGA   Med Res     VGA	 HiRes*     Hi-Res*
       _____________________________________________________________

       Display Name  E640   E1024      E640G	  E1280      E1280G
       Display	ID	10	11	   13	      12	 14
       n_glines       464     752	 464	   1000        1000
       gspacing 	 1	 1	    1	       1	  1
       bytesperline  2048    2048	2048	   2048        2048
       hard_xmax       639    1023	  639	    1279       1279
       hard_ymax      463     751	 463	    999        999

       *Note: Not available at the time of this writing.


       Since there is not hardware vector generating or block mover
       with  the  new video system, the 9836C routines will be used
       for vector generation and area fill. New  colormap  routines
       will be written to update and read the new colormap.


       5.1.1  _F_u_n_c_t_i_o_n_a_l_i_t_y  The  new  graphics  routines  will  be
       designed  to  be  functionally  equivalent  to  the  CATSEYE
       driver. The design objective is to require no  code  changes
       for  customers  using the existing driver except where there
       is dependancy on display resolution. Since the  VGA  display
       (640x480)  is  larger  than previous low-resolution displays
       (512x400), there  sould	be  miminal  impact.   The  medium-
       resoluion (1024x768) is the same as the 98545A/98547A/98549A
       video interfaces and should require no changes. If  a  high-
       resolution  display (1280x1024) is offered in the future, it
       will be the same as the 98550A  and  no	changes  should  be
       required to customer code.


       5.1.1.1	_P_e_r_f_o_r_m_a_n_c_e  Performace for the VGA subsystem  will
       be substantially faster the current low-resolution displays.
       This is a result of the new graphics hardware coupled  to  a
       faster 680X0 processor. Medium-resolution performance may be
       slower that the current medium-resolution subsytems  offered
       on  similar  performance  SPU's.  This is due to the lack of
       blockmover hardware used for area fills. Vector	performance











       PaWS 3.25 Prelim ERS   August 6, 1991			 18



       should be the same as current offerings.

































































				 CONTENTS


       1.  Pascal 3.25 System..................................   3
	   1.1	Description....................................   3
	   1.2	Hewlett-Packard  Proprietary...................   3

       2.  Product Structure...................................   4
	   2.1	General Information............................   4
	   2.2	Disc Changes...................................   4
	   2.3	Manuals........................................   5

       3.  Newly Supported Peripherals.........................  12
	   3.1	Newly Supported SCSI Discs.....................  12
	   3.2	Software Required..............................  12

       4.  CRT Driver CRTF.....................................  14
	   4.1	Description of New Displays....................  14
		4.1.1  Functionality...........................  15
		       4.1.1.1	Performance....................  15

       5.  DGL for 3.25........................................  17
	   5.1	Changes to DGL.................................  17
		5.1.1  Functionality...........................  17
		       5.1.1.1	Performance....................  17





























				  - i -




