Re: Tempest score modifications?

And speaking of, did anyone pull out the Vortex or Alien ROM code from
Clay's multigame? I'm assuming Clay hasn't redumped the ROMs yet, right
? :)

tm

jess askey wrote:
>
> Okay, looks like the Tempest code project has come a long way in the
> last couple of years...
> I will elaborate a bit....
>
> Looks like you have plenty of spare RAM space after $071D so you could
> use $071E for the
> Player 1 new digits and $0721 (see below for reason for skipping bytes)
> for Player 2's.
> You may want to use two higher ones in case
> The TCP (Tempest Code Project) missed a few used locations.
>
> The main score add routine is at... $CA6C and the core functionality
> ends at $CAAD(inclusive).
>
> DOH!... But... Looks like there is no space to add more code as the ROM
> images are bound up tight.
>
> Never mind.....
>
> I guess you will have to squash bytes and make the code smaller by
> looking for in-efficient code.
> You probably only need about 30 bytes. Here is what you would have to do
> with the code...
>
> SCORING ROUTINE:
> Here is entry @ CA6C.. Notice how the final add is done on RAM $0042 at
> the end, we will take this out and put
> A JMP to a new location (the new space you found somewhere). Once there,
> we will run the code that we just took out
> Plus our new digit functionality...
>
> CA6C F8: SED:imp Set Decimal ; Decimal math mode used for
> scores.
> CA6D 24:05 BIT:zp Zp RAM 0005
> CA6F 10:7E BPL:rel Branch->$CAEF
> CA71 A4:3D LDY:zp Zp RAM 003D ; If we are dealing with player
> 2,
> CA73 F0:02 BEQ:rel Branch->$CA77 ; offset the memory location of
> the
> CA75 A0:03 LDY:imm #03 ; score by three bytes.
> CA77 E0:08 CPX:imm #08
> CA79 90:16 BCC:rel Branch->$CA91
> CA7B A5:29 LDA:zp Zp RAM 0029
> CA7D 18: CLC:imp Clear Carry
> CA7E 79:40 00 ADC:abs,y $0040,Y ; Update the score.
> CA81 99:40 00 STA:abs,y $0040,Y
> CA84 A5:2A LDA:zp Zp RAM 002A
> CA86 79:41 00 ADC:abs,y $0041,Y
> CA89 99:41 00 STA:abs,y $0041,Y
> CA8C A5:2B LDA:zp Zp RAM 002B
> CA8E B8: CLV:imp Clear Overflow
> CA8F 50:15 BVC:rel Branch->$CAA6
> CA91 BD:F1 CA LDA:abs,x $CAF1,X
> CA94 18: CLC:imp Clear Carry
> CA95 79:40 00 ADC:abs,y $0040,Y ; Update the score.
> CA98 99:40 00 STA:abs,y $0040,Y
> CA9B BD:F9 CA LDA:abs,x $CAF9,X
> CA9E 79:41 00 ADC:abs,y $0041,Y
> CAA1 99:41 00 STA:abs,y $0041,Y
> CAA4 A9:00 LDA:imm #00
> CAA6 08: PHP:imp Push P
> ----->CAA7 79:42 00 ADC:abs,y $0042,Y ;Take
> this code out...
> ----->CAAA 99:42 00 STA:abs,y $0042,Y
>
> <-----CAA7 4C:XX XX JMP:abs (NewLocation @$XXXX)
> ;Replace with this
> CAAA 00:00 00
> CAAD 28: PLP:imp Pull P
> CAAE F0:0B BEQ:rel Branch->$CABB
> CAB0 AE:56 01 LDX:abs $0156
> CAB3 F0:06 BEQ:rel Branch->$CABB
>
> Now at $XXXX put in this code....
>
> 79:42 00 ADC:abs,y $0042,Y ;Our exisiting code
> 99:42 00 STA:abs,y $0042,Y
> A9:00 LDA:imm $00 ;Clear A, only use carry
> 79:1E 07 ADC:abs,y $071E,Y ;We need to maintain the offest
> between P1 and P2 scores so Y
> 99:1E 07 STA:abs,y $071E,Y ;still works for us
> 4C:AD CA JMP:abs $CAAD ;Go back
>
> Now we have to modify the vector routines..... I have go get back to
> work but you get the idea.
> If people want to explore this further let me know...
>
> (This ad sponsered by the 'Who wants to work on Monday' Committee.)
>
> > -----Original Message-----
> > From: owner-vectorlist@synthcom.com
> > [mailto:owner-vectorlist@synthcom.com] On Behalf Of Jonathan Koolpe
> > Sent: Monday, December 17, 2001 1:35 PM
> > To: vectorlist@synthcom.com
> > Subject: VECTOR: Tempest score modifications?
> >
> >
> > Hi all!
> >
> > I was just wondering if anyone out there has had any progress on the
> > possibility of modifying a Tempest to keep track of scores beyond
> > 999999?
> >
> > I have the "level select" chip in mine that allows me to start on any
> > level I want with the machine in "normal" mode (and still keep track
> > of high scores) along with a switchable tubes chip, but I would
> > absolutely love being able to keep track of scores higher than
> > 999999:). I'm sure many other Tempest owners would love to see this,
> > too...
> >
> > So is anyone out there working on this and/or has
> > accomplished a hack already?
> >
> > Just wondering,
> >
> > Jonathan
> > --
> > Jonathan Koolpe
> > Staff Research Associate
> > University of California, San Francisco
> > Department of Microbiology & Immunology
> > Tel: (415) 476-9371 Fax: (415) 476-8201
> > mail to: jkoolpe@itsa.ucsf.edu
> > --------------------------------------------------------------
> > -------------
> > ** To UNSUBSCRIBE from vectorlist, send a message with
> > "UNSUBSCRIBE" in the
> > ** message body to vectorlist-request@synthcom.com. Please
> > direct other
> > ** questions, comments, or problems to neil@synthcom.com.
> >
>
> ---------------------------------------------------------------------------
> ** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
> ** message body to vectorlist-request@synthcom.com. Please direct other
> ** questions, comments, or problems to neil@synthcom.com.
---------------------------------------------------------------------------
** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
** message body to vectorlist-request@synthcom.com. Please direct other
** questions, comments, or problems to neil@synthcom.com.
Received on Tue Dec 18 09:59:26 2001