= HF8V = / = SP8WJT = / = SP0106RZ =
HF-17244
PROJECT: HF-17244
DESCRIPTION: PRINTER CONTROL BOARD
TYPE: A4185616A
BRAND: RICOH
STATUS: 1u, 1n
PROJECT START DATE: near 2015
LOCALISATION: PD, PL
DOCUMENTATION: B-8 str. 29-30, 37 (PCB drawings, connectors, block diagrams), DVC
PCB: TPD57244, TPD58244
CPU CATALOG NUMBER: UC-202, UC-203
CPU: UPD7810
CPU BRAND: NEC
CPU FAMILY: 87AD (uCOM87)
ARCHITECTURE: 8b
THN ADDRESS: 0xEE, 0xED
UC TYPE: 0x3B
EXT ROM: 60K
RAM: 256
MAX CLOCK: 12 MHz (1 MIPS)
MODULE DIMENSIONS: 240x90 (TPD57244), 155x90 (TPD58244)
HF-17244#2 (modified)
| PROJECT | STATUS | USAGE | PCB | UC-### | THN ADR | HARDWARE VER. | SOFTWARE VER. | LOC. | REMARKS |
|---|
| HF-17244#1 | n | reserve/tests | TPD57244 | UC-202 | 0xEE | 1.0 | 0.01 | PD | not modified |
| HF-17244#2 | u | reserve/tests | TPD58244 | UC-203 | 0xED | 2.1 | 0.02 | PL | cutted from original module (power elements removed) |
First I recreated circuit diagram for this module (in paper notebook B-8 p. 29, 30, 37), this was crucial for understanding how program it (service manual is not avalaible as I know).
HF-17244#1 is hold intact while HF-17244#2 is modified version of original module:
1/ power supply and other not necessary elements cutted off and disassembled
2/ DIP28 memory socket changed to DIP32 and few paths rerouted (I'm using typical DIP32 flash memory here)
I made various tests and experiments on this module, writing some code in assembler.
It was also interesting to download and analyze original 1980's software, I learned some 87AD architecture tricks from here.
See [2] for more hardware details.
UPD7810 pins
UPD7810 block diagram
[1] UPD7810
[2] PROJECT FILE
[3] Notebook 'Mikroprocesory-2' p. 111-113, basic informations on architecture and assembler, basic code routines
Prefix 17
HF Register
Microcontrollers in my constructions and external equipment
Electronics
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