NEO-E0: Difference between revisions
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(Added chip position on board) |
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!VEC = 0||VEC = 1 | !VEC = 0||VEC = 1 | ||
|- | |- | ||
|$000000~$ | |$000000~$00007F||$C00000~$C0007F||$000000~$00007F | ||
|- | |- | ||
|$ | |$000080~$BFFFFF||colspan=2|$000080~$BFFFFF | ||
|- | |- | ||
|$C00000~$ | |$C00000~$C0007F||$000000~$00007F||$C00000~$C0007F | ||
|- | |- | ||
|$ | |$C00080~$FFFFFF||colspan=2|$C00080~$FFFFFF | ||
|} | |} | ||
Revision as of 03:42, 7 October 2018
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| Package | QFP64R |
| Manufacturer | 
|
| First use | 1991 ? |
| Used on | NEO-AES3-3 ... |
68k vector table swapping
The 68k vector table is swapped with the system ROM one by using REG_SWPBIOS or REG_SWPROM.
A22Z~A23Z are used to make the address appear to address decoding chips as a system ROM access instead of a P ROM access.
| Address | Maps to | |
|---|---|---|
| VEC = 0 | VEC = 1 | |
| $000000~$00007F | $C00000~$C0007F | $000000~$00007F |
| $000080~$BFFFFF | $000080~$BFFFFF | |
| $C00000~$C0007F | $000000~$00007F | $C00000~$C0007F |
| $C00080~$FFFFFF | $C00080~$FFFFFF | |
User:Kyuusaku: {A23Z,A22Z} = A[23:22] ^ 2{~|{A[21:7],^A[23:22],VEC}}
Pinouts
On the AES, the AND gate is used to get /SROMOE from /SROMOEL AND /SROMOEU.
MV2B @ H7 pinout
55 = sPCK1B 56 = sPCK2B
MV2B @ G2 pinout
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OpenOffice Draw file: File:Neo-e0 mv2b G2.odg |
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MV2B @ F7 pinout
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OpenOffice Draw file: File:Neo-e0 mv2b F7.odg |
Acts just as a buffer.
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MV2F @ E1 pinout (to be confirmed)
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OpenOffice Draw file: File:Neo-e0.odg |
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