Random F18A questions

[Asmusr]

From the info below it looks like you want to set all jumpers on.

   -- User header.  Pullup in the FPGA, a jumper in place will pull to ground.   --   --    USR           On    Off   -- -------------------------   --  1 Sprite dflt|  32  | 4   --  2 Scan lines |  No  | Yes   --  3 CPUCLK pin | P38  | P37   --  4 CPUCLK en  | HI-Z | CPUCLK   -- USR3 CPUCLK pin.  Provides support for the 9128/9129 that output CPUCLK on pin37.   -- USR3 and USR4 - CPUCLK pin and CPUCLK Enable.   --        _________   -- RAS  =|1   U  40|= XTAL1   9918A    9928A/29A 9118    9128/29 F18A   -- CAS  =|2      39|= XTAL2   ======== ========= ======= ======= ====   -- AD7  =|3      38|= ....... CPUCLK   R-Y       CPUCLK  R-Y     HI-Z / CPUCLK   -- AD6  =|4      37|= ....... GROMCLK  GROMCLK   NC      CPUCLK  GROMCLK / CPUCLK   -- AD5  =|5      36|= ....... COMVID   Y         COMVID  Y       NC   -- AD4  =|6      35|= ....... EXTVDP   B-Y       EXTVDP  B-Y     NC   --   -- Basically:   --             USR3 USR4   -- TI-99/4A     on   on    -- The 99/4A does not use the CPUCLK, but this is NOT the default of the 9918A   -- 9928/29      on   on    -- CPUCLK on pin38 disabled so it does not cram 3.5MHz into the R-Y circuit   -- 9918A/9118   on  off    -- CPUCLK output, GROMCLK output (pin37 is not connected on the 9118)   -- 9128/29     off   on    -- CPUCLK on pin37 disabled, CPUCLK output on pin38 enabled   -- not used    off  off    -- CPUCLK output on both pin37 and pin38

   -- User header.  Pullup in the FPGA, a jumper in place will pull to ground.   --   --    USR           On    Off   -- -------------------------   --  1 Sprite dflt|  32  | 4   --  2 Scan lines |  No  | Yes   --  3 CPUCLK pin | P38  | P37   --  4 CPUCLK en  | HI-Z | CPUCLK   -- USR3 CPUCLK pin.  Provides support for the 9128/9129 that output CPUCLK on pin37.   -- USR3 and USR4 - CPUCLK pin and CPUCLK Enable.   --        _________   -- RAS  =|1   U  40|= XTAL1   9918A    9928A/29A 9118    9128/29 F18A   -- CAS  =|2      39|= XTAL2   ======== ========= ======= ======= ====   -- AD7  =|3      38|= ....... CPUCLK   R-Y       CPUCLK  R-Y     HI-Z / CPUCLK   -- AD6  =|4      37|= ....... GROMCLK  GROMCLK   NC      CPUCLK  GROMCLK / CPUCLK   -- AD5  =|5      36|= ....... COMVID   Y         COMVID  Y       NC   -- AD4  =|6      35|= ....... EXTVDP   B-Y       EXTVDP  B-Y     NC   --   -- Basically:   --             USR3 USR4   -- TI-99/4A     on   on    -- The 99/4A does not use the CPUCLK, but this is NOT the default of the 9918A   -- 9928/29      on   on    -- CPUCLK on pin38 disabled so it does not cram 3.5MHz into the R-Y circuit   -- 9918A/9118   on  off    -- CPUCLK output, GROMCLK output (pin37 is not connected on the 9118)   -- 9128/29     off   on    -- CPUCLK on pin37 disabled, CPUCLK output on pin38 enabled   -- not used    off  off    -- CPUCLK output on both pin37 and pin38

Edited August 10, 2018 by Asmusr

[Asmusr]

Also when I plug any sound device outuput into Right side channel it blanks the screen?

But Left channel does not????

 

Assuming that you have a cable that looks like this:

 

 

Are you saying that the screen goes blank when you connect one of the red or white RCA audio connectors but not the other? That sounds like a bad cable to me.

[+chue]

 

Are you saying that the screen goes blank when you connect one of the red or white RCA audio connectors but not the other? That sounds like a bad cable to me.

 

Definitely be careful with that. My (similar) cable outputs 12 volts on the white connector.

Edited August 10, 2018 by chue

[RXB]

 

From the info below it looks like you want to set all jumpers on.

   -- User header.  Pullup in the FPGA, a jumper in place will pull to ground.   --   --    USR           On    Off   -- -------------------------   --  1 Sprite dflt|  32  | 4   --  2 Scan lines |  No  | Yes   --  3 CPUCLK pin | P38  | P37   --  4 CPUCLK en  | HI-Z | CPUCLK   -- USR3 CPUCLK pin.  Provides support for the 9128/9129 that output CPUCLK on pin37.   -- USR3 and USR4 - CPUCLK pin and CPUCLK Enable.   --        _________   -- RAS  =|1   U  40|= XTAL1   9918A    9928A/29A 9118    9128/29 F18A   -- CAS  =|2      39|= XTAL2   ======== ========= ======= ======= ====   -- AD7  =|3      38|= ....... CPUCLK   R-Y       CPUCLK  R-Y     HI-Z / CPUCLK   -- AD6  =|4      37|= ....... GROMCLK  GROMCLK   NC      CPUCLK  GROMCLK / CPUCLK   -- AD5  =|5      36|= ....... COMVID   Y         COMVID  Y       NC   -- AD4  =|6      35|= ....... EXTVDP   B-Y       EXTVDP  B-Y     NC   --   -- Basically:   --             USR3 USR4   -- TI-99/4A     on   on    -- The 99/4A does not use the CPUCLK, but this is NOT the default of the 9918A   -- 9928/29      on   on    -- CPUCLK on pin38 disabled so it does not cram 3.5MHz into the R-Y circuit   -- 9918A/9118   on  off    -- CPUCLK output, GROMCLK output (pin37 is not connected on the 9118)   -- 9128/29     off   on    -- CPUCLK on pin37 disabled, CPUCLK output on pin38 enabled   -- not used    off  off    -- CPUCLK output on both pin37 and pin38

   -- User header.  Pullup in the FPGA, a jumper in place will pull to ground.   --   --    USR           On    Off   -- -------------------------   --  1 Sprite dflt|  32  | 4   --  2 Scan lines |  No  | Yes   --  3 CPUCLK pin | P38  | P37   --  4 CPUCLK en  | HI-Z | CPUCLK   -- USR3 CPUCLK pin.  Provides support for the 9128/9129 that output CPUCLK on pin37.   -- USR3 and USR4 - CPUCLK pin and CPUCLK Enable.   --        _________   -- RAS  =|1   U  40|= XTAL1   9918A    9928A/29A 9118    9128/29 F18A   -- CAS  =|2      39|= XTAL2   ======== ========= ======= ======= ====   -- AD7  =|3      38|= ....... CPUCLK   R-Y       CPUCLK  R-Y     HI-Z / CPUCLK   -- AD6  =|4      37|= ....... GROMCLK  GROMCLK   NC      CPUCLK  GROMCLK / CPUCLK   -- AD5  =|5      36|= ....... COMVID   Y         COMVID  Y       NC   -- AD4  =|6      35|= ....... EXTVDP   B-Y       EXTVDP  B-Y     NC   --   -- Basically:   --             USR3 USR4   -- TI-99/4A     on   on    -- The 99/4A does not use the CPUCLK, but this is NOT the default of the 9918A   -- 9928/29      on   on    -- CPUCLK on pin38 disabled so it does not cram 3.5MHz into the R-Y circuit   -- 9918A/9118   on  off    -- CPUCLK output, GROMCLK output (pin37 is not connected on the 9118)   -- 9128/29     off   on    -- CPUCLK on pin37 disabled, CPUCLK output on pin38 enabled   -- not used    off  off    -- CPUCLK output on both pin37 and pin38

All 4 jumpers are on the board as it came that way?

All are on the both pins none off set to indicate turned off.

[RXB]

 

Assuming that you have a cable that looks like this:

 

s-l300.jpg

 

Are you saying that the screen goes blank when you connect one of the red or white RCA audio connectors but not the other? That sounds like a bad cable to me.

I do not own andy 3 wire DIN plugs all of mine are 4 wire ones. Red, White, Black and Yellow.

[matthew180]

With the F18A you need the 5-pin DIN cable to pick up the sound and break it out to an RCA or similar connector, as mentioned several times above. You should leave the USR3 and USR4 jumpers *on* for use in the 99/4A, and only change USR1 and/or USR2 if you want to modify the default sprites-per-line or fake scan-lines options, as indicated previously.

[RXB]

With the F18A you need the 5-pin DIN cable to pick up the sound and break it out to an RCA or similar connector, as mentioned several times above. You should leave the USR3 and USR4 jumpers *on* for use in the 99/4A, and only change USR1 and/or USR2 if you want to modify the default sprites-per-line or fake scan-lines options, as indicated previously.

Well my panic was my Samsung Monitor will not use the RCA jacks for sound if you have VGA plugged into the unit, so my fault for not knowing this.

[matthew180]

I'm glad you got it sorted out. I think a monitor that acted like that would trip me up too.

[RXB]

Yea I have numerous times used it for the TI, but without a F18 yet.

Now RCA has both Video and L/R channels.

But SVGA is just Video and no way to send sound as it auto select whatever is active (in this case SVGA port) thus it ignores RCA jacks.