Side project: multi System E (Sega)

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    • Side project: multi System E (Sega)

      A small side project I'm working on for a couple a friends.
      Big thank to @mastercello for giving me a boardset.

      Only 8 known games on this System:
      - Astro Flash/Transformer
      - Fantazy Zone II (encrypted)
      - Hang-On Jr. (requires specific analog I/O board)
      - Megumi Rescue (original owner doesn't want to release the ROMs for now, so won't be included in the multi)
      - Opa Opa (encrypted)
      - Riddle of Pythagoras (requires specific spinner I/O board)
      - Slap Shooter
      - Tetris

      Only 2 ROM banks, so 2 EPROMs needed for the kit, nothing special here, it works as it should.
      An other big thank to @mastercello for confirming the decrypted sets work fine on real hardware (couldn't test myself as I was missing the adapter as System E isn't JAMMA).

      It could have been the end of this small announcement but... :D

      First for once I wanted to build a nice adapter, something not hand soldered with dozens of sagging wires:

















      And it works just great:









      Then System E being based on the Master System I wondered if it could run console games, even if it wasn't the main goal of this multi, it could be a nice addition. Of course there are some differences:
      - System E has 2 VDPs
      - Some I/O ports are at different addresses, sometimes with data arranged differently

      The main obstacle was the input ports for controls:

      Master System (from SMS Power):

      Port $DC: I/O port A and B
      Bit Function
      7 Port B Down pin input
      6 Port B Up pin input
      5 Port A TR pin input
      4 Port A TL pin input
      3 Port A Right pin input
      2 Port A Left pin input
      1 Port A Down pin input
      0 Port A Up pin input

      Port $DD: I/O port B and miscellaneous
      Bit Function
      7 Port B TH pin input
      6 Port A TH pin input
      5 Cartridge slot CONT pin *
      4 Reset button (1= not pressed, 0= pressed) *
      3 Port B TR pin input
      2 Port B TL pin input
      1 Port B Right pin input
      0 Port B Left pin input

      System E (from MAME):

      PORT_START("e1") /* Read from Port 0xe1 */
      PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(1)
      PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(1)
      PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(1)
      PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(1)
      PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1)
      PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(1)
      PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNUSED )
      PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED )

      PORT_START("e2") /* Read from Port 0xe2 */
      PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(2)
      PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(2)
      PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(2)
      PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(2)
      PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
      PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2)
      PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNUSED )
      PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED )


      Which gives the following equivalent

      DC.b0 0x01 => E1.b0 0x01
      DC.b1 0x02 => E1.b1 0x02
      DC.b2 0x04 => E1.b2 0x04
      DC.b3 0x08 => E1.b3 0x08
      DC.b4 0x10 => E1.b4 0x10
      DC.b5 0x20 => E1.b5 0x20
      DC.b6 0x40 => E2.b0 0x01
      DC.b7 0x80 => E2.b1 0x02
      DD.b0 0x01 => E2.b2 0x04
      DD.b1 0x02 => E2.b3 0x08
      DD.b2 0x04 => E2.b4 0x10
      DD.b3 0x08 => E2.b5 0x20


      The idea is to patch ports on the fly so a standard MS cartridge can be plugged in the multi.
      As you see player 2 inputs are spread across 2 registers on Master System. It would require quite complicated hardware to handle those so the patching only supports inputs for player 1.


      I used a simple GAL22V10 chip for on-the-fly patching and it works quite well:




      BUT... Background colour is always black as VDP1 isn't used by MS games and it's the one handling the background layer on System E. Otherwise games play identical:





      I even went further and tried some SG-1000 games. This time controls didn't work at all (although working perfectly fine in MAME as always || ) :




      Looking for:
      - faulty Hang-On, Space Harrier or Enduro Racer (2203 sound board)
      - Sega Mega-CD 1 power board
      - Super Nintendo CPU (3 needed)



      "I'd 1cc games but I have a real life."
      01010011 01000101 01000011 01010010 01000101 01010100 00100000 01001101 01000101 01001110 01010101 00100000 01000111 01010101 01011001

      The post was edited 2 times, last by Apocalypse ().

    • Mitsurugi-w wrote:

      If you thought M72 pcbs were expensive wait until you try to find one of these...
      Yes I already well know how much they are expensive and I'm looking for one of them from a little while, so it's not excluded that I'll buy one of them on the future even if they are expensive as I did for the M72 (even if they are cheaper compared to those ones) :)

      The post was edited 1 time, last by sk8er000 ().

    • mastercello wrote:

      @Apocalypse - you're most welcome and good god, that Jamma Adapter is sweet.
      Now i need one of them too … :love:
      You'll have one for sure! This all happened because of you ;)
      I'm still working on the multi:
      - System E games work fine however I'd like to include a joystick hack version of games using special controls
      - I'd like to figure out why SG-1000 games controls don't work
      - I'd like to find a way to have a proper background colour for Master System/Mark III games

      Are you happy guys to wait patiently (Xmas is coming so probably nothing new until early next year)?
      Is it worth the effort?
      Looking for:
      - faulty Hang-On, Space Harrier or Enduro Racer (2203 sound board)
      - Sega Mega-CD 1 power board
      - Super Nintendo CPU (3 needed)



      "I'd 1cc games but I have a real life."
      01010011 01000101 01000011 01010010 01000101 01010100 00100000 01001101 01000101 01001110 01010101 00100000 01000111 01010101 01011001
    • KalessinDB wrote:

      I'm beginning to wonder if you actually do things like eat and sleep. My gut tells me no, given the rate at which you're pumping these multis out. Good lord!
      As a good friend uses to say "we'll sleep next year". :D
      Looking for:
      - faulty Hang-On, Space Harrier or Enduro Racer (2203 sound board)
      - Sega Mega-CD 1 power board
      - Super Nintendo CPU (3 needed)



      "I'd 1cc games but I have a real life."
      01010011 01000101 01000011 01010010 01000101 01010100 00100000 01001101 01000101 01001110 01010101 00100000 01000111 01010101 01011001
    • Derick2k wrote:

      @Apocalypse Can you please add to the list for both the jamma adapter and multi, thank you.
      Hi Derick2k,
      Ok let's build a list:

      System E to JAMMA adapter:
      @mastercello
      @lorenzo2mars (for Jean-Mix)
      @Mitsurugi-w => got one! (but need one more)
      @zizer
      @Derick2k
      @Nodoyuna
      @Alpha1 * 3
      Ryantiger99 (email)
      @CoolFox

      System E multi kit:
      @mastercello
      @lorenzo2mars (for Jean-Mix)
      @Mitsurugi-w
      @zizer
      @Derick2k
      @Nodoyuna
      Ryantiger99 (email)
      @CoolFox
      Looking for:
      - faulty Hang-On, Space Harrier or Enduro Racer (2203 sound board)
      - Sega Mega-CD 1 power board
      - Super Nintendo CPU (3 needed)



      "I'd 1cc games but I have a real life."
      01010011 01000101 01000011 01010010 01000101 01010100 00100000 01001101 01000101 01001110 01010101 00100000 01000111 01010101 01011001

      The post was edited 5 times, last by Apocalypse ().

    • Apocalypse wrote:

      Derick2k wrote:

      @Apocalypse Can you please add to the list for both the jamma adapter and multi, thank you.
      Hi Derick2k,Ok let's build a list:

      System E to JAMMA adapter:
      @mastercello
      @lorenzo2mars (for Jean-Mix)
      @Mitsurugi-w
      @Derick2k

      System E multi kit:
      @mastercello
      @lorenzo2mars (for Jean-Mix)
      @Mitsurugi-w
      @zizer ?
      @Derick2k
      Thanks my friend !
      Multis
      CPS 1 (Aje) / 2 & 3 / 1.5 (chinese)
      Taito F3
      MVS
      Sega C2
      Irem M72
      Sega S16B
    • Thank you! :)

      Also, thank you @mastercello for the donation to make this happen :thumbup:


      Wanted: Batsugun, Battle Garegga, Battle Bakraid, Deathsmiles, War of Aero
      13/14" TriSync Tube/Chassis, Vewlix Shipping Brackets
      If you have any of these for sale/trade let me know please and lets make a deal :thumbup:

      The post was edited 1 time, last by Derick2k ().