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Memory Map

The following is a memory map that was generated based on the MAME source code (.180).  This information is only as accurate as the MAME driver is.  If you see any errors, please let me know what that error is.
 
The Memory Area is related to where the information is from (CPU, Sound Board, etc..), and it may also reflect what it has in common with other hardware.
Juno First (Konami, 1983)
Memory Area:audio_map
Address RangeLengthFunctionDescription
0x0000-0x0FFF4096ROM
0x2000-0x23FF1024RAM
0x30001Device Readsoundlatch, generic_latch_8_device, read
0x40001Device Writeaysnd, ay8910_device, address_w
0x40011Device Readaysnd, ay8910_device, data_r
0x40021Device Writeaysnd, ay8910_device, data_w
0x50001Device Writesoundlatch2, generic_latch_8_device, write
0x60001Writei8039_irq_w
Memory Area:main_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768RAM, Sharedvideoram
0x8000-0x800F16RAM Device Write, Sharedpalette, palette_device, write, palette
0x80101Read PortDSW2
0x0003LivesActive High
0x00033Active High
0x00024Active High
0x00015Active High
0x0000256 (Cheat)Active High
0x0004CabinetActive High
0x0000UprightActive High
0x0004CocktailActive High
0x0070DifficultyActive High
0x00701 (Easiest)Active High
0x00602Active High
0x00503Active High
0x00404Active High
0x00305Active High
0x00206Active High
0x00107Active High
0x00008 (Hardest)Active High
0x0080Demo_SoundsActive High
0x0080OffActive High
0x0000OnActive High
0x801C1Device Readwatchdog, watchdog_timer_device, reset_r
0x80201Read PortSYSTEM
0x80241Read PortP1
0x80281Read PortP2
0x802C1Read PortDSW1
0x80301Writeirq_enable_w
0x8031-0x80322Writecoincounter_w
0x80331Write Only, Sharedscroll (/* not used in Juno */)
0x8034-0x80352Writeflip_screen_w
0x80401Writesh_irqtrigger_w
0x80501Device Writesoundlatch, generic_latch_8_device, write
0x80601Writebankselect_w
0x8070-0x80734Writeblitter_w
0x8100-0x8FFF3840RAM
0x9000-0x9FFF4096ROM Bankbank1
0xA000-0xFFFF24576ROM
Memory Area:mcu_io_map
Address RangeLengthFunctionDescription
0x00001Device Writedac, dac_byte_interface, write
0x0000-0x00FF256Device Readsoundlatch2, generic_latch_8_device, read
0x00001Writei8039_irqen_and_status_w
Memory Area:mcu_map
Address RangeLengthFunctionDescription
0x0000-0x0FFF4096ROM
 

ROM Map for this game

 
This is the ROM map for the game.  This should tell you what address the ROM is at, how big it is, what it's used for.   
Memory Area:audiocpu
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096jfs1_j3.binCRC(235a2893) (Fluke: 2502)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0xA000-0xBFFF8192jfa_b9.binCRC(f5a7ab9d),program ROMs (Fluke: E0D9)
0xC000-0xDFFF8192jfb_b10.binCRC(f20626e0) (Fluke: CFF4)
0xE000-0xFFFF8192jfc_a10.binCRC(1e7744a7) (Fluke: B56A)
0x10000-0x11FFF8192jfc1_a4.binCRC(03ccbf1d),graphic and code ROMs (banked) (Fluke: BABE)
0x12000-0x13FFF8192jfc2_a5.binCRC(cb372372) (Fluke: A304)
0x14000-0x15FFF8192jfc3_a6.binCRC(879d194b) (Fluke: 302F)
0x16000-0x17FFF8192jfc4_a7.binCRC(f28af80b) (Fluke: FB2D)
0x18000-0x19FFF8192jfc5_a8.binCRC(0539f328) (Fluke: 05F4)
0x1A000-0x1BFFF8192jfc6_a9.binCRC(1da2ad6e) (Fluke: 74A9)
Memory Area:mcu
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096jfs2_p4.binCRC(d0fa5d5f) (Fluke: ABEA)
0x0000-0x1FFF8192jfs3_c7.binCRC(aeacf6db) (Fluke: F8D2)
0x2000-0x3FFF8192jfs4_d7.binCRC(206d954c) (Fluke: 6655)
0x4000-0x5FFF8192jfs5_e7.binCRC(1eb87a6e) (Fluke: 2034)
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