Wikis > Wikis > Consoles > Turbografx-16

The Turbografx-16, originally known as the PC Engine in Japan, was the first console released as a 16 bit console though technically it is an 8 bit console. Don’t like it – sue me!

Technical Specifications


Memory Map


The HuC6280 processor provides a 21bit address bus on the TurboGrafx allowing contiguous addressing of up to 2MB. The address space is divided into 256 8KB pages.

Start AddressEnd AddressPagesSize*Description
0x0000000x0FFFFF0x00 - 0x7F1MBHuCard ROM Space (may be mirrored with HuCards smaller than 1MB)
0x1000000x1EEFFF0x80 - 0xF7Unused, see CD-ROM
0x1F00000x1F7FFF0xF8 - 0xFB8KBRAM - pages 0xF9 - 0xFB are mirrors of 0xF8
0x1F80000x1FDFFF0xFC - 0xFEUnused
0x1FE0000x1FFFFF0xFF8KBHardware Page

*size refers to the useful size within the range excluding any mirroring

Super System Card

Start AddressEnd AddressPagesSize *Description
0x0000000x0CFFFF0x00 - 0x67832KBROM Space
0x0D00000x0FFFFF0x68 - 0x7F192KBRAM

Video System

Signal Measurements


CSYNC – 960mV p-p into 10K load


The dbGrafx Booster TTP is a video enhancer I offer for sale which adds S-Video and RGB signals to TurboGrafx-16 / PC-Engine.

EXT Port

The EXP Port is located on the back of the console and is used primarily to interface to the CD Unit, TurboBooster or the db Grafx Booster. There are also RGB, composite video, and stereo audio signals found on the EXT Port which can be used to significantly increase the video and audio output quality.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
C SNDR GND HuD CEK A17 A13 A11 GND D2 D4 D6 D7 A1 A3 A4 A6 GND A15 A19 GND Vout Sync Blu
B SNDin CDD HSM /WR VU A8 /OE D0 D3 D5 HSn A0 A2 VD6 A5 A7 A12 A16 A20 /RDY IRQ2 /RST Grn
A SNDL Vout VS A18 A14 A9 A10 D1 DCK VSn Vin VD8 VD7 Vin VD5 VD4 VD3 VD2 VD1 VD0 GND Vid Red
Power Audio/Video Data Bus Address Bus System Functions Video Bus (?)


The HuCard on PCe/TG-16 is a 38pos 0.050″ pitch custom connector. The HuCard are 0.093″ thick.

HuCardThis is the pin sequence from left to right for a TG-16, point of view is looking at the HuCard being inserted to a console. For a PCe, simply reverse the data pins (i.e. D0..D7 instead of D7..D0).

Pin #Description
1Card Detect (active low)
2Audio In
3Address 19
4Address 16
5Address 15
6Address 12
7Address 7
8Address 6
9Address 5
10Address 4
11Address 3
12Address 2
13Address 1
14Address 0
15Data 7
16Data 6
17Data 5
19Data 4
20Data 3
21Data 2
22Data 1
23Data 0
25Address 10
27Address 11
28Address 9
29Address 8
30Address 13
31Address 14
32Address 17
33Address 18
35HSM (High Speed Mode)



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