NEO-D0: Difference between revisions
Jump to navigation
Jump to search
m (→Pinout) |
Illusionrip (talk | contribs) |
||
| (5 intermediate revisions by 3 users not shown) | |||
| Line 20: | Line 20: | ||
{{Pinout|NEO-D0|640}} | {{Pinout|NEO-D0|640}} | ||
=Internal schematic= | |||
=Internal schematic of Z80 section= | |||
[[File:Neo-d0_sd.png]] | [[File:Neo-d0_sd.png]] | ||
=NEC Board AES Version (NEO-D0 made with TTL Logic) = | |||
[[File:Neo-d0 Board NEC.png]] | |||
=Signals= | =Signals= | ||
| Line 29: | Line 34: | ||
* {{Sig|BNK*|BNK*}}: [[Memory card]] upper address lines to {{Chipname|NEO-E0}} | * {{Sig|BNK*|BNK*}}: [[Memory card]] upper address lines to {{Chipname|NEO-E0}} | ||
* {{Sig|A4|A4}}: 68k address line for decoding | * {{Sig|A4|A4}}: 68k address line for decoding | ||
* {{Sig| | * {{Sig|6116CS|6116CS}}: [[Z80 RAM]] select | ||
* 2610*: YM2610 control outputs | * 2610*: YM2610 control outputs | ||
* {{Sig|OUT*|OUT*}}: Joypad outputs | * {{Sig|OUT*|OUT*}}: Joypad outputs | ||
Latest revision as of 06:11, 18 April 2025
| |
| Package | QFP64R |
| Manufacturer | 
|
| First use | 1990 ? |
| Used on | MV4 and many more... |
- Clock divider
- Z80 memory and port control
- YM2610 interface
- Memory card bank selection
- Joypad outputs
Maybe similar to NEO-SUD on the NeoGeo CD. Close to the audio hardware.
Pinout
Internal schematic of Z80 section
NEC Board AES Version (NEO-D0 made with TTL Logic)
Signals
- D*: 68k data bus for joypad outputs
- BNK*: Memory card upper address lines to NEO-E0
- A4: 68k address line for decoding
- 6116CS: Z80 RAM select
- 2610*: YM2610 control outputs
- OUT*: Joypad outputs
- SDMRD: Z80 ROM/RAM read
- SDMRW: Z80 RAM write
- SDRD*: Z80 port read to NEO-ZMC in cartridge
- SDZ80CLR: Clear command code in NEO-C1
- SDZ80RD: Read command code from NEO-C1
- SDZ80WR: Write reply code to NEO-C1