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Directory of hardware compatibility for modern retrocomputing.

At this moment, I am still thinking about a best format to present the information here using Gemtext.

For now, mostly headers and basic lists are available, but things might change anytime.

This will be an ever-growing list of old hardware that could be used for modern retrocomputing.

If you are looking for a specific piece of hardware but wondering if it will work for your purposes, please check this list, it might help you clear your doubts.

Also, if you would like to collaborate, please send me any information about hardware that could be usefull.

Please note that I have most experience mostly with Japanese vintage computers only, and very limited with western ones.

Also, I don't know if these items can be obtained easily or at all outside Japan, so please investigate that by yourself, but in general, most the items here are easy to obtain in Japan at an affordable price.

720Kb 3.5' Floppy Drives

600Kb, 1Mb 3.5' Floppy Drives

2DD 5.25' Internal Floppy drives

2HD 5.25' Internal Floppy Drives

CPU Accelerators

I tested them with the CPUs described below. Might be compatible with others.

PC-98 accelerators

Compatibility with other models or computers is not tested or guaranteed.

(English translation in process)

Columns as follow:

Name | Make | CPU | Advertised Clock Speed | Real Clock Speed | Coprocessor | Notes

==== For PC-9801FA
HDX-16W 		Melco 	i486DX 		33MHz 	32MHz 	○ 	
HFA-16W 		Melco 	i486DX 		33MHz 	32MHz 	○ 	
JBOXSX2ODP50		Intel 	SX2ODP 		50MHz 	50MHz 	× 	オーバードライブプロセッサ
JBOXDX2ODP50		Intel 	DX2ODP 		50MHz 	50MHz 	○ 	オーバードライブプロセッサ
HDX-16Q 		Melco 	i486DX2 	66MHz 	64MHz 	○ 	
HFA-16Q 		Melco 	i486DX2 	66MHz 	64MHz 	○ 	
HFA-16QY 		Melco 	i486DX2 	66MHz 	64MHz 	○ 	
HFA-16QS 		Melco 	i486DX2 	66MHz 	64MHz 	○ 	
HFA-16H 		Melco 	intel DX4 	100MHz 	96MHz 	○ 	
HFA-16HS 		Melco 	intel DX4 	100MHz 	96MHz 	○ 	
EUF-H0M 		Melco 	intel DX4 	100MHz 	96MHz 	○ 	メモリスロット搭載
EUF-EP0M 		Melco 	Am486DX5 	133MHz 	128MHz 	○ 	メモリスロット搭載

==== For PC-9801BA
JBOXDX4ODPR75 		Intel 	DX4ODP 		75MHz 	75MHz 	○ 	オーバードライブプロセッサ
EUB-Q0M 		Melco 	Intel DX4 	100MHz 	90MHz 	○ 	メモリスロット搭載
EUB-F0M 		Melco 	Intel DX4 	100MHz 	90MHz 	○ 	メモリスロット搭載
EUB-F16M 		Melco 	Intel DX4 	100MHz 	90MHz 	○ 	↑の同等品(16MBメモリ実装済)
PK-586x4 		IOData	Cx5x86-100GP	100MHz 	80MHz 	○ 	
EUB-H0M 		Melco 	Cx5x86-120GP 	120MHz 	120MHz 	○ 	メモリスロット搭載
PK-A586/98 		IOData 	Am486DX5 	133MHz 	120MHz 	○ 	
EUB-HP0M 		Melco 	Am486DX5 	133MHz 	120MHz 	○ 	メモリスロット搭載

==== For PC-9801BA2
HAS-33TP 		Melco 	Cx5x86-100GP 	100MHz 	100MHz 	○ 	
EUZ-Q0M 		Melco 	Intel DX4 	100MHz 	100MHz 	○ 	メモリスロット搭載
PK-586x3 		IOData 	Cx5x86-P75 	100MHz 	100MHz 	○ 	
EUZ-QP0M 		Melco 	Am486DX5 	133MHz 	133MHz 	○ 	メモリスロット搭載
V.M. Drive CVS* 	ACT*** 	Am486DX5 	133MHz 	133MHz 	○ 	
V.P.M.PNT-33**		ACT 	PentiumODP? 	83MHz 	83MHz 	○ 	

==== For PC-9801BA3
JBOXDX4ODP100 		Intel 	Intel DX4ODP 	100MHz 	100MHz 	○ 	オーバードライブプロセッサ
PC-9821E-02 		NEC 	Intel DX4ODP 	100MHz 	100MHz 	○ 	↑と同等品
JBOXPODP5V83(S) 	Intel 	PentiumODP 	83MHz 	83MHz 	○ 	オーバードライブプロセッサ
PC-9821E-03 		NEC 	PentiumODP 	83MHz 	83MHz 	○ 	↑と同等品
HAS-33TP 		Melco 	Cx5x86-100GP 	100MHz 	100MHz 	○ 	
PK-586x3 		IOData 	Cx5x86-P75 	100MHz 	100MHz 	○ 	
PK-A586/98 		IOData 	Am486DX5 	133MHz 	133MHz 	○ 	
Viper Max Drive 586X 	ACT 	Am486DX5 	133MHz 	133MHz 	○ 	

==== For PC-9801BX
JBOXSX2ODP50 		Intel 	Intel SX2ODP 	50MHz 	40MHz 	× 	オーバードライブプロセッサ
JBOXDX2ODP50 		Intel 	Intel DX2ODP 	50MHz 	40MHz 	○ 	オーバードライブプロセッサ
PC-9801BX-01 		NEC 	Intel DX2ODP 	50MHz 	40MHz 	○ 	↑と同等品
PC-9821A-E03 		NEC 	Intel DX2ODP 	50MHz 	40MHz 	○ 	↑と同等品
PC-9821A-E03L 		NEC 	Intel DX2ODP 	50MHz 	40MHz 	○ 	↑と同等品
HBX-25W 		Melco 	i486DX2 	50MHz 	40MHz 	○ 	
HBX-20T 		Melco 	i486DX2 	66MHz 	60MHz 	○ 	
HBX-20TY 		Melco 	i486DX2 	66MHz 	60MHz 	○ 	
HBX-25T 		Melco 	Intel DX4 	75MHz 	60MHz 	○ 	
HBX-25TS 		Melco 	Intel DX4 	75MHz 	60MHz 	○ 	
JBOXDX4ODP75 		Intel 	Intel DX4ODP 	75MHz 	75MHz 	○ 	オーバードライブプロセッサ
PC-9821E-02 		NEC 	Intel DX4ODP 	100MHz 	80MHz 	○ 	↑と同等品
EUB-Q0M 		Melco 	Intel DX4 	100MHz 	80MHz 	○ 	メモリスロット搭載
EUB-F0M 		Melco 	Intel DX4 	100MHz 	90MHz 	○ 	メモリスロット搭載
EUB-F16M 		Melco 	Intel DX4 	100MHz 	90MHz 	○ 	↑の同等品(16MBメモリ実装済)
PK-586x4 		IOData 	Cx5x86-100GP 	100MHz 	80MHz 	○ 	
Viper Max Drive CVS 	ACT 	Am486DX5 	133MHz 	80MHz 	○ 	
EUB-H0M 		Melco 	Cx5x86-120GP 	120MHz 	120MHz 	○ 	メモリスロット搭載
PK-A586/98 		IOData	Am486DX5 	133MHz 	120MHz 	○ 	
EUB-HP0M 		Melco 	Am486DX5 	133MHz 	120MHz 	○ 	メモリスロット搭載

==== For PC-9801BX2
JBOXSX2ODP50 		Intel 	Intel SX2ODP 	50MHz 	50MHz 	× 	オーバードライブプロセッサ
JBOXDX2ODP50 		Intel 	Intel DX2ODP 	50MHz 	50MHz 	○ 	オーバードライブプロセッサ
PC-9821A-E03 		NEC 	Intel DX2ODP 	50MHz 	50MHz 	○ 	↑と同等品
PC-9821A-E03L 		NEC 	Intel DX2ODP 	50MHz 	50MHz 	○ 	↑と同等品
HBX-25W 		Melco 	i486DX2 	50MHz 	50MHz 	○ 	
HBX-25T 		Melco 	Intel DX4 	75MHz 	75MHz 	○ 	
HBX-25TS 		Melco 	Intel DX4 	75MHz 	75MHz 	○ 	
EUZ-Q0M 		Melco 	Intel DX4 	100MHz 	100MHz 	○ 	メモリスロット搭載
PK-586x4 		IOData 	Cx5x86-100GP 	100MHz 	100MHz 	○ 	
V.M. Drive CVS 		ACT 	Am486DX5 	133MHz 	100MHz 	○ 	
PK-A586/98 		IOData 	Am486DX5 	133MHz 	100MHz 	○ 	
EUZ-QP0M 		Melco 	Am486DX5 	133MHz 	100MHz 	○ 	メモリスロット搭載
V.P.M. PNT-25 		ACT 	PentiumODP? 	63MHz 	63MHz 	○

==== For PC-9801BX3
JBOXDX2ODP66 		Intel 	Intel DX2ODP 	66MHz 	66MHz 	○ 	オーバードライブプロセッサ
PC-9821A-E04 		NEC 	Intel DX2ODP 	66MHz 	66MHz 	○ 	↑と同等品
PC-9821A-E04L 		NEC 	Intel DX2ODP 	66MHz 	66MHz 	○ 	↑と同等品
JBOXDX4ODP100 		Intel 	Intel DX4ODP 	100MHz 	100MHz 	○ 	オーバードライブプロセッサ
PC-9821E-02 		NEC 	Intel DX4ODP 	100MHz 	100MHz 	○ 	↑と同等品
JBOXPODP5V83(S) 	Intel 	PentiumODP 	83MHz 	83MHz 	○ 	オーバードライブプロセッサ
PC-9821E-03 		NEC 	PentiumODP 	83MHz 	83MHz 	○ 	↑と同等品
HAS-33TP 		Melco 	Cx5x86-100GP 	100MHz 	100MHz 	○ 	
PK-586x3 		IOData 	Cx5x86-100GP 	100MHz 	100MHz 	○ 	
PK-A586/98 		IOData 	Am486DX5 	133MHz 	133MHz 	○ 	
V.M. Drive 586X 	ACT 	Am486DX5 	133MHz 	133MHz 	○

==== For PC-9801BX4(/U2-P; /U2/C-P sub-models only)
JBOXDX4ODP100 		Intel 	Intel DX4ODP 	100MHz 	100MHz 	○ 	オーバードライブプロセッサ
PC-9821E-02 		NEC 	Intel DX4ODP 	100MHz 	100MHz 	○ 	↑と同等品
JBOXPODP5V83(S) 	Intel 	PentiumODP 	83MHz 	83MHz 	○ 	オーバードライブプロセッサ
PC-9821E-03 		NEC 	PentiumODP 	83MHz 	83MHz 	○ 	↑と同等品
HAS-33TP 		Melco 	Cx5x86-100GP 	100MHz 	100MHz 	○ 	
PK-586x3 		IOData 	Cx5x86-100GP 	100MHz 	100MHz 	○ 	
PK-A586/98 		IOData 	Am486DX5 	133MHz 	133MHz 	○ 	
V.M. Drive 586X 	ACT 	Am486DX5 	133MHz 	133MHz 	○

==== For PC-9801BS
JBOXDX2ODP66 		Intel 	Intel DX2ODP 	66MHz 	66MHz 	○ 	オーバードライブプロセッサ
PC-9821A-E04 		NEC 	Intel DX2ODP 	66MHz 	66MHz 	○ 	↑と同等品
PC-9821A-E04L 		NEC 	Intel DX2ODP 	66MHz 	66MHz 	○ 	↑と同等品
HAS-33W 		Melco 	i486DX2 	66MHz 	66MHz 	○ 	
HAS-33TP 		Melco 	Cx5x86-100GP 	100MHz 	100MHz 	○ 	
EUZ-Q0M 		Melco 	Intel DX4 	100MHz 	100MHz 	○ 	メモリスロット搭載
PK-586x3 		IOData 	Cx5x86-P75 	100MHz 	100MHz 	○ 	
PK-A586/98 		IOData 	Am486DX5 	133MHz 	133MHz 	○ 	
EUZ-QP0M 		Melco 	Am486DX5 	133MHz 	133MHz 	○ 	メモリスロット搭載
V.M. Drive CVS 		ACT 	Am486DX5 	133MHz 	133MHz 	○ 	
V.P.M. PNT-33 		ACT 	PentiumODP? 	83MHz 	83MHz 	

15KHz / 24KHz / 31KHz LCD Monitors

Non-NEC Keyboards for PC-98

There are actually not many, but the few that exist are usually excellent mechanical keyboards.

If you ever find one from the list below, do not hesitate to acquire.

So far I only own one of these, but I am aware of at least two more brands/models, but unfortunately I couldn't test them, so I don't know if they are mechanical or membrane.

Power Supply Replacement

Modern switching power supplies that output 5v and 12v in a tiny form factor.

Useful for replacing old internal vintage PSUs or create your own external one.

Video Converters

Cheap options if you don't want to buy a Framemeister, OSSC or similars.

Expansion Units and Boards

List of uncommon internal or external boards or accessories to expand the capabilities or functionalities of a computer.

C-BUS Boards for PC-98 compatible computers

List of uncommon or rare C-BUS boards for PC-98 compatible computers such as NEC or EPSON computers.

Buffalo WindowAccelerator WSN-A2F

Combines graphical acceleration, PCM and 86K sound source functions. 2Mb video memory version.

Buffalo WindowAccelerator WSN-A4F

Same as before, but with 4Mb video memory instead of 2Mb.

Please refer to the next image for DIP Switch configuration (24.3Kb, PNG, 448x336)

DIP (1): 1=Do not use FM sound functions; 3*=Use FM sound functions

DIP (2): 1=Use high brightness setting; 3*=Do not use high brightness setting

CON (3): Expansion connector. Cable is sold separately.

As for compatibility, the WSN-A2F/4F boards are compatible with any PC-98 that has at least a i386 processor.

PC-98 computers with 8086/V30/80286 can use only the FM sounce source function.

Using a Melco CPU Accelerator on a 80286 will allow to use the WindowAccelerator function as well.

The computer models PC-9801 UX and EX are incompatible with the FM sound functions.

The computer PC-9801 ES is incompatible with the PCM sound functions.

The computers EPSON PC-486 (except PRO-486) and PC-586 can be used only in desktop/normal mode

This board is supported with Windows 3.1 (Enhance Mode only), Windows 95 (using manufactured driver) and MS-DOS (only FM sound functions).

Click here to download drivers for Windows 3.1 (1052Kb, paq8-compressed)

Download Paq8o from here (HTTPS)