List of ROM chips

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(Most infos from the publicly available romref.txt file)

  • Mask ROMs aren't reprogrammable. They're originals from SNK in most cases.
  • EPROMs are erasable by UV light.
  • EEPROMs and flash are similar, and can be reprogrammed electrically.

32KiB (8 bit)

Reference Manufacturer Type Pin count Pinout
27C256 * EPROM 28
MB83256 Fujitsu Mask 28
LH53259 Sharp Mask 28
TC53257 Toshiba Mask 28

64KiB (8 bit)

Reference Manufacturer Type Pin count Pinout
27C512 * EPROM 28
MB83512 Fujitsu Mask 28
LH53517 Sharp Mask 28

128KiB (8 bit)

Reference Manufacturer Type Pin count Pinout
27C010 * EPROM 32
27C1000 *
MB831000 Fujitsu 32
HN62321 Hitachi
uPD23C1000 NEC 28
uPD23C1001 NEC 32
uPD23C1010 NEC 28
LH530800 Sharp
LH531000 Sharp
TC531000 Toshiba
TC531001 Toshiba

128KiB (16 bit)

Use this for the system ROM.

Reference Manufacturer Type Pin count Pinout
23C1024 *
TC531024 Toshiba 40
LH531024 Sharp

256KiB (8 bit)

Reference Manufacturer Type Pin count Pinout
27C020 *
MB832000 Fujitsu
HN62302B Hitachi
uPD23C2000 NEC 40
uPD23C2001 NEC 32
LH532100 Sharp



To add:


------------------------------------------------------
Fujitsu

4M   256k x 16 / 512k x 8   MB834100 (40 pin)
4M   512k x 8               MB834000 (32 pin)
4M   256k x 16 / 512k x 8   MB834200 (40 pin)
------------------------------------------------------

Hitachi

EPROM

27512
27C1024H
27C101A
27C301A non-jedec
27C4000
27C4096
27C4001

Mask ROM
--------
Hitachi

2M  128K x 16 / 256K x 8    HN62412/422
    128K x 16               HN62442B

4M  256K x 16 / 512K x 8    HN62414/434
    256K x 16 / 512K x 8    HN62415
    256K x 16 / 512K x 8    HN62W415
    256K x 16 / 512K x 8    HN62444
    256K x 16               HN62444B
    256K x 16               HN62444BN
    512K x 8                HN62314B/334B
    512K x 8                HN62344B
    512K x 8                HN62335B
    512K x 8                HN62W335B

8M  512K x 16 / 1M x 8      HN62418/428
    512K x 16 / 1M x 8      HN62W428
    512K x 16 / 1M x 8      HN62438
    512K x 16 / 1M x 8      HN62448
    512K x 16 / 1M x 8      HN62438N
    512K x 16 / 1M x 8      HN62448N
    1M x 8                  HN62318B/328B
    1M x 8                  HN62W328B
    1M x 8                  HN62338B

16M 1M x 16 / 2m x 8        HN624116
    1M x 16 / 2m x 8        HN624W116
    1M x 16 / 2m x 8        HN624316
    1M x 16 / 2m x 8        HN624316N

------------------------------------------------------

NEC

    4Mbit                   uPD23C4000 40 pin  / 64 pin FP
                            uPD23C4001 32 pin

------------------------------------------------------

Sharp
    128k x 16               LH532048
    256k x 8 / 128k x 16    LH532000
    512k x 8                LH534700
------------------------------------------------------
    
Toshiba
    512k x 8                TC534000
    512k x 8 / 256k x 16    TC534200
    1M x 8 / 512k x 16      TC538000
    1M x 8 / 512k x 16      TC538200
    2M x 8 / 1M x 16        TC5316200

------------------------------------------------------

EPROM Cross Reference
---------------------
            32kx8       64kx8       128kx8      128kx8      64kx16
AMD         27C256      27C512      27C010                  27C1024
Fujitsu     27C256      27C512      27C1001     27C1000     27C1024
Hitachi     27C256                  27C101      27C301      27C1024
Intel       27C256                  27C010                  27C210
Mitsubishi  27C256      27C512      27C101      27C100      27C102
NEC         27C256      27C512      27C1001     27C1000     27C1024
OKI         27256
TI          27C256      27C512      27C010                  27C210
Toshiba     TC57256     TC57512     TC571000    TC571001    TC571024

            256kx8      128k x 16 / 256k x 8
AMD         27C020      27C2048
NEC         27C2001

            512kx8      512kx8/256kx16
AMD
Fujitsu     27C4000/1   27C4096
Hitachi
Intel
Mitsubishi
NEC         27C4001
OKI
TI
Toshiba     TC574000    TC574200

Mask ROM Cross Reference
------------------------
            128k x 8        128k x 8
Fujitsu     MB831000
Toshiba     TC531000        TC531001
Hitachi     HN62321/31      HN62321A/31A
Mitsubishi  231000
NEC         23C1000         23C1001
OKI         531000
Sharp       LH531000
Sony        381000

            64k x 16        64k x 16        512k x 8 / 256k x 16
Toshiba     TC531024        TC53H1024       TC534200
Fujitsu                                     MB834100
Hitachi                                     HN62404
Mitsubishi                                  23C400P
NEC         23C1024
OKI
Sharp                                       534000

            1m x 8 / 512k x 16      2m x 8 / 1m x 16
Fujitsu
Toshiba     TC538200                TC5316200
Hitachi     HN62801                 HN621601
Mitsubishi  23C800P                 231600P
NEC         23C8000                 23C1600
OKI
Sharp       538100                  531601

            512k x 8
Fujitsu     MB83400
Toshiba     TC53400
Hitachi     HN62401
Mitsubishi  23C400
NEC         23C4000
OKI
Sharp       LH534100
Sony