NEO-E0: Difference between revisions
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{{ChipInfo | |||
|picture=aes_e0.jpg | |||
|pkg=QFP64R | |||
|manu=fujitsu | |||
|date=1991 ? | |||
|gates= | |||
|used_on={{PCB|NEO-AES3-3}} ... | |||
}} | |||
=68k vector table swapping= | |||
The 68k vector table is swapped with the [[system ROM]] one by using {{Reg|REG_SWPBIOS}} or {{Reg|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. | |||
{|class="wikitable" | |||
!rowspan=2|Address||colspan=2|Maps to | |||
|- | |||
!VEC = 0||VEC = 1 | |||
|- | |||
|$000000~$00007F||$C00000~$C0007F||$000000~$00007F | |||
|- | |||
|$000080~$BFFFFF||colspan=2|$000080~$BFFFFF | |||
|- | |||
|$C00000~$C0007F||$000000~$00007F||$C00000~$C0007F | |||
|- | |||
|$C00080~$FFFFFF||colspan=2|$C00080~$FFFFFF | |||
|} | |||
[[User:Kyuusaku]]: {A23Z,A22Z} = A[23:22] ^ 2{~|{A[21:7],^A[23:22],VEC}} | [[User:Kyuusaku]]: {A23Z,A22Z} = A[23:22] ^ 2{~|{A[21:7],^A[23:22],VEC}} | ||
On the AES, the AND gate is used | =Pinouts= | ||
On the AES, the AND gate is used to get /SROMOE from /SROMOEL AND /SROMOEU. | |||
==MV2B @ H7 pinout== | ==MV2B @ H7 pinout== | ||
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|} | |} | ||
= | ==MV2F @ E1 pinout (to be confirmed)== | ||
{| | {| |
Revision as of 03:42, 7 October 2018
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
OpenOffice Draw file: File:Neo-e0 mv2b G2.odg |
|
MV2B @ F7 pinout
OpenOffice Draw file: File:Neo-e0 mv2b F7.odg |
Acts just as a buffer.
|
MV2F @ E1 pinout (to be confirmed)
OpenOffice Draw file: File:Neo-e0.odg |
|