SBC6303用にMC6847アダプタをつくる

SBC6303にMC6847(1000-17FF/4000-57FF)をつないでビデオ出力したい。 https://vintagechips.wordpress.com/2018/04/26/sbc6303%E3%83%AB%E3%83%BC%E3%82%BA%E3%82%AD%E3%83%83%E3%83%88/

Address  A15 A14 A13 A12 A11| /CS /CE O14 O13 O12 O11 RAM
>0000    0   0   0   0   0  |  1  1   -   -   -   -
>0800    0   0   0   0   1  |  1  1   -   -   -   -
>1000    0   0   0   1   0  |  1  0   0   0   0   0  >00000
>1800    0   0   0   1   1  |  1  0   0   0   0   1  >00800
>2000    0   0   1   0   0  |  0  1   -   -   -   -
>2800    0   0   1   0   1  |  1  1   -   -   -   -
>3000    0   0   1   1   0  |  1  1   -   -   -   -
>3800    0   0   1   1   1  |  1  1   -   -   -   -
>4000    0   1   0   0   0  |  1  0   0   0   0   0  >00000
>4800    0   1   0   0   1  |  1  0   0   0   0   1  >00800
>5000    0   1   0   1   0  |  1  0   0   0   1   0  >01000
>5800    0   1   0   1   1  |  1  0   0   0   1   1  >01800
>6000    0   1   1   0   0  |  1  1   -   -   -   -
>6800    0   1   1   0   1  |  1  1   -   -   -   -
>7000    0   1   1   1   0  |  1  1   -   -   -   -
>7800    0   1   1   1   1  |  1  1   -   -   -   -
>8000    1   0   0   0   0  |  1  1   -   -   -   -
>8800    1   0   0   0   1  |  1  1   -   -   -   -
>9000    1   0   0   1   0  |  1  1   -   -   -   -
>9800    1   0   0   1   1  |  1  1   -   -   -   -
>A000    1   0   1   0   0  |  1  1   -   -   -   -
>A800    1   0   1   0   1  |  1  1   -   -   -   -
>B000    1   0   1   1   0  |  1  1   -   -   -   -
>B800    1   0   1   1   1  |  1  1   -   -   -   -
>C000    1   1   0   0   0  |  1  1   -   -   -   -
>C800    1   1   0   0   1  |  1  1   -   -   -   -
>D000    1   1   0   1   0  |  1  1   -   -   -   -
>D800    1   1   0   1   1  |  1  1   -   -   -   -
>E000    1   1   1   0   0  |  1  1   -   -   -   -
>E800    1   1   1   0   1  |  1  1   -   -   -   -
>F000    1   1   1   1   0  |  1  1   -   -   -   -
>F800    1   1   1   1   1  |  1  1   -   -   -   -
;
; TITLE SBC6303 VDG ADAPTER
; PATTERN A REVISION 1.1
; AUTHOR TANAM1972
; COMPANY PARALLEL COMPUTER INC
; DATE 6/13/20

CHIP TVBOY GAL22V10D

NC NC NC NC A8 A9 A10 A11 A12 A13 A14 GND
A15 NC NC NC I11 I12 I13 I14 CE CS NC VCC

EQUATIONS

I11 = A11

I12 = A14 * A12

I13 = GND

I14 = GND

CE = A15 + A13 + /A14 * /A12

CS = A15 + A14 + /A13 + A12 + A11

回路図

       SBC6303 24HC245        HM62256 MC6847 74LS174  GAL22V10D
PIN 1  /RD     DIR1
PIN 2  /WR                     /WE
PIN 3  D0      D0      IO0     IO0    IO0     D0
PIN 4 D1      D1      IO1     IO1    IO1     D1
PIN 5 D2      D2      IO2     IO2    IO2     D2
PIN 6 D3      D3      IO3     IO3    IO3     D3
PIN 7 D4      D4      IO4     IO4    IO4     D4
PIN 8  D5      D5      IO5     IO5    IO5     D5
PIN 9  D6      D6      IO6     IO6    IO6/INV
PIN10  D7      D7      IO7     IO7    IO7/AS
PIN11  A0      A0      O0      O0     O0
PIN12  A1      A1      O1      O1     O1
PIN13  A2      A2      O2      O2     O2                                
PIN14  A3      A3      O3      O3     O3
PIN15  A4      A4      O4      O4     O4
PIN16  A5      A5      O5      O5     O5
PIN17  A6      A6      O6      O6     O6
PIN18  A7      A7      O7      O7     O7
PIN19 A8      A8      O8      O8     O8
PIN20 A9      A9      O9      O9     O9
PIN21 A10     A10     O10     O10    O10
PIN22 A11     I11     O11     O11    O11            A11     I11
PIN23 A12     I12     O12     O12    O12            A12     I12
PIN24  A13     A13     O13     O13                   A13     I13
PIN25  A14     A14     O14     O14                   A14     I14
PIN26  A15                                           A15
PIN27  RW
PIN28  E
PIN29  /IRQ                          /HS
PIN30  /RES
PIN31  P10
PIN32  P11
PIN33  P12
PIN34  P13
PIN35  P14
PIN36  P15
PIN37  P16
PIN38  P17
PIN39  VCC    DIR23           VCC    VCC     VCC    VCC
PIN40  GND              GND/CE/OE    GND  GND/MR    GND
                                     GM2     Q0
                                     AG      Q1
                                     CSS     Q2
                                     GM1     Q3
                                     GM0     Q4
                                 INT/EXT     Q5
              G123                   /MS                    CE
                                             CP             CS
                                     CHB
                                     B
                                     A
                                     Y
                                    /FS
                                    /RP