= HF8V = / = SP8WJT = / = SP0106RZ =

HF-17202

PROJECT: HF-17202
TYPE: A0965130G
DESCRIPTION: XERO control board
BRAND: RICOH
STATUS: n
PROJECT START DATE:
LOCALISATION: PG
DOCUMENTATION: TM, DVC
PCB: TPD57202
DIMENSIONS: 155 x 150 mm
HARDWARE VERSION: 1.00

CPU: UPD78C14
BRAND: NEC
FAMILY: 87AD
CPU CATALOG NUMBER: UC-213
CLOCK: 15 MHz (1.25 MIPS)
EXTERNAL ADDRESS SPACE: 48KB
RAM: 256B
THN ADR: 0xFC
TYPE: 0x3D

Project Info

It was control board for RICOH xero. CPU is configured for internal memory, but there is interface to connect external memory, minor modifications must be made.

I'm interested in assembler writing for this UC and I already compiled some soft for it, but not tested yet. This is what I calling 'retro' CPU project. Even if this CPU is very slow, still quite complicated system can be written in 48 KB memory space.

There is another module with UPD78C14 HF-17591 and I also had 3rd CPU as reserve (catalogued as UC-212) but I cannot find it, so possible that I scrapped it. Practically the same instruction set is used in other NEC 87AD family modules:

UPD7811 HF-12211

UPD78C10 HF-17233

UPD7810 HF-17244#1

UPD7810 HF-17244#2

UPD78C14 pins