Japanese Display Adapters
for High-Quality Japanese Fonts

Introduction
AVEC Series (16-bit w/ AVE)
   Display Adapter II (old)
   Display Adapter II (new)
   Display Adapter III
   Display Adapter IV
     Display Adapter IV Daughter Card
   Display Adapter V
BVEC Series (16-bit w/ BVE)
   Display Adapter B-II (old)
   Display Adapter B-II (new)
DBCS Series (32-bit w/ BVE)
   DBCS Display Adapter/J
   DBCS Display Adapter/NI-J
Display Modes
Video Connector
   Video Connector Pinout
Japanese Display Adapters and Win95
Japanese Display Adapters and PS/2s

Content created by Sandy and Major Tom.


Introduction

High quality Japanese Fonts, that's what IBM Japan pursued from the very beginning.
   The original IBM PC was introduced together with MDA - Monochrome Display Adapter (720x350 text only) and CGA - Color Graphics Array (640x200 2 colors) in 1981. In order to handle Japanese Kanji characters, Japanese PC manufacturers developed their own video systems. Most of the manufacturers used 640x400 dots resolution using 16x16-dot Kanji fonts, but these video systems were company-specific and were not compatible with each other. As a result of this incompatibility, every company shipped its machines with a manufacturer-specific version of MS-DOS.
   IBM Japan decided to use high quality 24x24-dot fonts for their Multistation computer line that required 1024x768 resolution. (IBM Japan also used 16x16 dots fonts for entry-level models and these were designed for a resolution of 720x512 pixels.)
   The full (non-abbreviated) Kanji fonts with 24x24 dot characters were really beautiful and the basic concepts about the treatment of Japanese characters and the video system of the Multistation series had been carried over to PS/55 Display Adapter II and the video mode was known as PS/55 High-resolution mode. IBM DOS J4.0 (usually referred to as JDOS) was one of the previously mentioned company-specific versions of MS-DOS. In this case, modified by IBM Japan to be used solely for the PS/55 line and its PS/55 Display Adapters.

1981 1982 1983 1984 1987 1990
 
IBM
US
MDA &
CGA
EGA VGA 8514/A XGA
640x200
2C, 4C
640x350
6C
640x480
16C
1024x768
256C
1024x768
256C
 
IBM
JP
Multistation
5550
PS/55 D/A XGA
VGA DOS/V
1024x768
16C
1024x768
16C, 256C
1024x768
640x480
16C/256C
 
NEC
&
NEC PC9801 AX JEGA VGA DOS/V
Others 640x400
16C
640x480
16C
640x480
256C


AVEC Series (16-bit w/ AVE)

The AVEC series of Japanese Display Adapters was developed for the 1st-gen PS/55s such as the 5570 and 5550 386 machines that had a VGA subsystem on the planar.

The adapters come with 1MB VRAM on board in the stock configuration (except for Display Adapter IV).

Product P/N E/C Shipped with EC # -> alternative parts
DA 94X0968 ? 5570S ECC13008 -> 38F4650
DA II 79F0114 C13008A-C13008C 5570S ECC64642H -> C13008F
DA III 79F0116 C13008A - C13008E 5570S ECC64642H -> C13008F
DA III 79F0116 C13008F 5570S  
DA II 94X1649 341648A - 341648E 5550S/T/V, 5570T/V ECC64642E -> C27285C
DA II 38F4650 341964A - 341964C 5550S/T/V, 5570T/V ECC64642E -> C27285C
DA III 64F8907 C27285A - C27285B 5550S/T/V, 5570T/V ECC64642E -> C27285C
DA III 64F8907 C27285C 5550S/T/V, 5570T/V  
DA IV 38F7016 C13500A - C13500B 5530S/T ECC64642G -> C13500C
DA IV 38F7016 C13500C 5530S/T  
DA V 56F7520 ? 5550S/T/V, 5570T/V  

The table has been borrowed from HERE (modified).

Display Adapter (codename LEO?, P/N?)

Triple deck card intended for model 5570-S.

Not information about this adapter. Please contact me if you have this card.

Display Adapter II (old) (P/N 38F4650) [P] [P]

F1 Fuse (see HERE)
J1? 60-pin Connector for VRAM module?
J2? 40-pin Connector for Font ROM module?
J18 Video Connector (see HERE)
U2-7,9,10 65X2554 (41465)
U11,13 65X1194 PG / TC110G38AF
U12,14 65X1195 PV / TC110G38CG
U15 94X1320 FONT
U16-47 65X2554 (41465)
U48 94X5608 PC / TC110G17AF
U51 65X1193 PD / TC110G38AF
U52 Bt453KPJ66 RAMDAC
Y1 58.000 MHz Osc

Custom logic implemented using the Toshiba TC110G CMOS gate arrays.

Stock video adapter for model 5550-S/T.

Display Adapter II (new) (P/N 94X1649?) [P] [P]

F1 Fuse (see HERE)
J1 60-pin Connector for VRAM module?
J2 40-pin Connector for Font ROM module?
J3 Video Connector (see HERE)
U1 94X1320 FONT
U2,4 38F4782 PG / TC110G38AF
U3,5 56F7478 PV / TC110G38CG
U6-13 65X2554 (41465)
U17-48 65X2554 (41465)
U14 56F7477 PD / TC110G38HS
U15 56F7479 PC / TC110G17HS
U16 83X3208 RAMDAC

Custom logic implemented using the Toshiba TC110G CMOS gate arrays.

Display Adapter III (P/N 56F7520) [P] [P]

F1 Fuse (see HERE)
J1 60-pin Connector for VRAM module?
J2 40-pin Connector for Font ROM module?
J3 Video Connector (see HERE)
U1 94X1320 FONT
U2,4 38F4782 PG / TC110G38AF
U3,5 38F4781 PV / TC110G38CG
U6-13 65X2554? (41465)
U17-48 65X2554? (41465)
U14 56F7477 PD / TC110G38AF
U15 56F7479 PC / TC110G17AF
U16 83X3208 RAMDAC

Custom logic implemented using the Toshiba TC110G CMOS gate arrays.

Display Adapter IV (P/N 38F7016, my log says P/N 79F5417) [P] [P] [P]

J1 40-pin Connector for Font ROM module?
J2 80-pin Connector for VRAM module
J3 Video Connector (see HERE)
U1-14 65X2554? (41465)
U15,19,22,25,28,31,32,34 M5M4464AL-12
U16 90X8941 VGA
U17-18 65X2554 (41465?)
U20,21,23,24,26,27,29,30 65X2554 (41465?)
U33 83X3208 RAMDAC
U35 38F4782 PG / TC110G38AF
U36 38F4781 PV / TC110G38CG
U37 38F4780 PD / TC110G38AF
U38 38F4783 PC / TC110G17AF
U39 94X1320 FONT
Y1 28.322 MHz Osc
Y2 39.272 MHz Osc
Y3 25.175 MHz Osc

Custom logic implemented using the Toshiba TC110G CMOS gate arrays.

Stock Video Adapter for 5530-Z (and probably for 5530-T). Two types of this adapter exist.
512 KB video RAM on the PCB, additional 512 KB can be added through connector J1.

This adapter comes with a VGA chip on board (90X8941) but has the AVE connector, rather than BVE as one would expect (5530-T/S doesn't have a VGA subsystem on the planar; Ed. Tom: maybe IBM wanted to make this adapter easy to use in other models with on-planar video?).

Display Adapter IV Daughter Card (P/N 38F7075?, P/N 38F7076, P/N 64F9668) [P] [P]

J1 80-pin Connector
U2 56F7478 PV / TC110G38CG
U3 38F4782 PG / TC110G38AF
U4-19 65X2554? (41465)

Display Adapter V (P/N 56F7520) [P]

F1 Fuse (see HERE)
J1 60-pin Connector for VRAM module?
J2 40-pin Connector for Font ROM module?
J3 Video Connector (see HERE)
U1 94X1320 FONT
U2,4 38F4782 PG / TC110G38AF
U3,5 56F7478 PV / TC110G38CG
U6-13 65X2554 (41465)
U17-48 65X2554 (41465)
U14 56F7477 PD / TC110G38AF
U15 54F7479 PC / TC110G17AF
U16 83X3208 RAMDAC

Custom logic implemented using the Toshiba TC110G CMOS gate arrays.

Stock video adapter for 5551-S1/T1/V1 and 5571-V1.


BVEC Series (16-bit w/ BVE)

Display Adapter B

No information about this adapter. Please contact me if you have this card.

Display Adapter B-II (Older Version, ZIP RAM, P/N 79F2159) [P] [P]

F1 Fuse (see HERE)
J1 40-pin Connector (pads only)
J2 Video Connector (see HERE)
U1 90X8941 VGA
U2-25 65X2554? (41465)
U27-34 65X2554 (41465)
U48 83X3208 RAMDAC
U51,53 38F4782 PG / TC110G38AF
U52,54 56F7478 PV / TC110G38CG
U55 56F7477 PD / TC110G38AF
U56 56F7479 PC / TC110G17AF
U57 94X1320 FONT
VRAM M5M4464AL-12? (VGA)
Y1 25.175 MHz Osc
Y2 28.322 MHz Osc
Y3 58.000 MHz Osc
Y4 45.570 MHz Osc
Y5 47.424 MHz Osc
ZIP RAM below J1 65X2554 (41465)

Custom logic implemented using the Toshiba TC110G CMOS gate arrays.

Stock video adapter for 5541-T (386-20), 5561-W (486-33), 5580-Y (and probably for 5551-Vxx).

Display Adapter B-II (Newer Version, P/N 79F5413) [P] [P]

F1 Fuse (see HERE)
J1 40-pin Connector (pads only)
J2 Video Connector (see HERE)
U1-7,18 HM511665JP8 64Kx16 DRAM
U8,9 TC511664J-10 64Kx16 DRAM
U10 90X8941 VGA
U12 ROS 79F5421 / HN62408FPD55 8M ROM
U14,15 HM511664JP8 64Kx16 DRAM
U19,21 38F4782 PG / TC110G38AF
U20,22 56F7478 PV / TC110G38CG
U23 79F5427 PD7 / TC140G37AF
U24 56F7479 PC / TC110G17AF
U25 INMOS IMSG176-J66 RAMDAC
Y1 25.175 MHz Osc
Y2 28.322 MHz Osc
Y3 58.000 MHz Osc
Y4 45.570 MHz Osc
Y5 47.424 MHz Osc

Custom logic implemented using the Toshiba TC110G and TC140G CMOS gate arrays.


DBCS Series (32-bit w/ BVE)

The DBCS series of adapters was sold with the newer 486 desktops such as 5551-N/Y/R/L, 5530-L, 5521-Y.

DBCS Display Adapter/J (P/N 49G2000, FRU 07G0446) [P] [P] [P]

Stock video card for 5551-N/Y.

F1 Fuse (see HERE)
J1 Video Connector (see HERE)
U1-7,17 1M W/B HM511665JP8 64Kx16 DRAM
U8,9,12,15 1M BW HM511664JP8 64Kx16 DRAM
U10 Video 34G3196
U11 79F5427 PD7 / TC140G37AF
U13 8M ROS 79F5421 / HN62408FPD55 8M ROM
U14 4M ROS (pads only)
U16 89F5832 RAMDAC
U18,20 38F4782 PG / TC110G38AF
U19,21 56F7478 PV / TC110G38CG
U22 "BUSCON" 06G6722
Y1 45.570 MHz Osc
Y2 58.000 MHz Osc
Y3 47.424 MHz Osc
Y4 25.175 MHz Osc
Y5 28.322 MHz Osc
Y6 41.5390 MHz Osc

Custom logic implemented using the Toshiba TC110G and TC140G CMOS gate arrays.

DBCS Display Adapter/NI-J "Non-Interlaced" (P/N 54G1464, FRU 54G1463) [P] [P]

J1 Video Connector (see HERE)
U1,2,4,5 HM511664JP8 64Kx16 DRAM
U3 662G8275 / HN62418FZ10 8M ROM
U6,7,9,10 76G9119
U8 66G9060PGV2 / TC6217TF
U11 ICS 9412 9128-42CW16
U12 34G3155
U13 54G1466
U14 79F5427 / TC140G37AF
U15 "BUSCON" 06G6722
U16 INMOS IMSG176J-80 RAMDAC
U18 85G7137 ROM
Y1 14.318 MHz xtal

Some of the custom logic implemented using the Toshiba TC140G CMOS gate array.

The last Japanese Display Adapter shipped with models 5551-R/L and 5521-Y1B.


Display Modes

Resolution Horizontal Vertical Pixel Clock Mode
Description
Frequency Polarity Frequency Polarity
1024x768i 46.08 kHz Positive 116.2 Hz Positive 58.000 MHz PS/55 text mode
1024x768i 46.51 kHz Positive 114.9 Hz Positive 58.000 MHz PS/55 graphic mode

   Please note that since the display modes are interlaced (except for the J-NI adapter) they may not be supported by some newer monitors (especially LCDs).


Video Connector

   All Japanese PS/55 display adapters described here feature the normal HD15 female connector used by most VGA adapters. The pinout and signals are mostly compatible with the standard analog VGA interface as well, with two notable differences:
   First - the PS/55 adapters don't implement the Display ID feature that normally uses pins 4, 11, 12, and 15 to identify the connected display unit. This alone however shouldn't cause any compatibility issues.
   The second, more important difference is the presence of 12 volts on pin 9. This voltage is used by some IBM monitors as a "power on" signal (for example the IBM 5574-C05/06/07 and M06/W06 monitors where it closes a normally opened power supply relay). Pin 9 is used as a "key" by most other period-correct monitors, so the voltage won't even reach the display unit, which means there's nothing to worry about in this case. However if your monitor does have this pin populated, be careful, as this could cause problems.
   Most PS/55 display adapters have a small fuse (typically marked "F1") that protects the 12 V supply from an overcurrent situation. So if the connected monitor overloads the 12 V line (i.e. by shorting it to ground), the fuse will blow. If this happens the adapter and the rest of the system should still operate normally, but the 12 V supply will be missing from the video connector (not really an issue, unless you intend to use one of the IBM monitors that use it as a "power on" signal). However with some of the newer monitors that expect 5 V on this pin, you could be less lucky and the higher voltage could damage the monitor! (even if the empirical evidence suggests otherwise...) To avoid any such issues use an extension cable that doesn't have pin 9 populated, or carefully remove it with a pair of nose pliers.

Video Connector Pinout

Pin I/O Signal
1 O Red
2 O Green
3 O Blue
4 N/A Reserved
5 N/A Reserved
6 N/A Red Ground
7 N/A Green Ground
8 N/A Blue Ground
9 O +12 V (fused)
10 N/A Digital Ground
11 N/A Reserved
12 N/A Reserved
13 O H Sync
14 O V Sync
15 N/A Reserved


Japanese Display Adapters and Win95

   The PS/55 display adapter driver for Win 3.1J can be used with Win95 to get resolution of 1024x768 and 16 colors, but it's SLOW (these adapters are really intended to be used with DOS and Win 3.1). Japanese Readers, please see THIS if you want to known how to use the PS/55 Display Adapter family under Win95.


Japanese Display Adapters and PS/2s

   The Japanese Display Adapters were designed to be used with IBM Japan's specialized JDOS. It has been said that the AVEC display adapters can't be used with the PS/2 line, but the BVEC and DA-J adapters supposedly can. I'm not sure about these claims but I've once used one of the Japanese display adapters with the 8570 25 MHz planar. I don't remember exactly which card have I used. Anyway, in order to get color signal from one of the "PS/2 compatible" display adapters you will have to use the following trick.

   To get color image you have to add CHKMON.EXE to your AUTOEXEC.BAT (the utility can be also found on the Reference Diskette). This may be necessary only for adapters predating the DA B-II card, the later DBCS adapters may work out of the box, but I'm not sure. I've confirmed this using PS/2 Model 8570 with the 25MHz planar and D/A-III.


PS/55 Index