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}} | |||
=Pinouts= | |||
On the AES, the AND gate is used to get /SROMOE from /SROMOEL AND /SROMOEU. | |||
[[File:Neo-e0_pinout.png]] | ==MV2B @ H7 pinout== | ||
55 = sPCK1B | |||
56 = sPCK2B | |||
==MV2B @ G2 pinout== | |||
{| | |||
| | |||
[[File:Neo-e0_G2_pinout.png|512px]] | |||
OpenOffice Draw file: [[File:Neo-e0_mv2b_G2.odg]] | |||
| | |||
*A1~A23: [[68k]] address bus | |||
*MCA0~MCA23: [[memory card]] address bus | |||
*BNK0~BNK2: memory card banking from [[NEO-D0]] | |||
*VEC: [[System ROM]] vector table swapping enable | |||
|} | |||
==MV2B @ F7 pinout== | |||
{| | |||
| | |||
[[File:Neo-e0_F7_pinout.png|512px]] | |||
OpenOffice Draw file: [[File:Neo-e0_mv2b_F7.odg]] | |||
| | |||
Acts just as a buffer. | |||
*s*: signals to both slots | |||
|} | |||
==MV2F @ E1 pinout (to be confirmed)== | |||
{| | |||
| | |||
[[File:Neo-e0_pinout.png|512px]] | |||
OpenOffice Draw file: [[File:neo-e0.odg]] | OpenOffice Draw file: [[File:neo-e0.odg]] | ||
| | |||
*A1~A23: 68k address bus | *A1~A23: 68k address bus | ||
*Y0~Y23: memory card address bus | *Y0~Y23: memory card address bus | ||
*BNK0~BNK2: comes from [[NEO-D0]], | *BNK0~BNK2: comes from [[NEO-D0]], [[memory card]] banking | ||
*VEC: | *VEC: System ROM vector table swapping enable | ||
*ANI0, ANI1, AND0: AND gate used to generate ROMOE from ROMOEU and ROMOEL | *ANI0, ANI1, AND0: AND gate used to generate ROMOE from ROMOEU and ROMOEL | ||
|} | |||
[[Category:Chips]] | [[Category:Chips]] |
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 |
|