= HF8V = / = SP8WJT = / = SP0106RZ =
HF-1471
PROJECT: HF-1471
DESCRIPTION: Mobile EEPROM module 32KB
STATUS: u
DOCUMENTATION:
PCB: TPD42236#3
DIMENSIONS: 12 x 11 mm (without connector)
CHIP: 24C256
SUPPLY VOLTAGE: 3.3V/5V (1.8-5.5V)
MAX CURRENT:
CAPACITY: 32 KB
INTERFACE: HF-10032
FILE SYSTEM: THFS8
SEGMENTS: 128
SYSTEM SEGMENTS: 1
USER SEGMENTS: 127
MEDIA DESCRIPTOR: 0x2490
VOLUME ID: 2222-012C
MEMORY MODULE: MM-271
Small mobile memory used in 8-bit digital systems, especially in HF-6030 system in SLOT B with HF-10032 serial I2C interface.
HF-1471 is formatted in my THFS file system.
Formatting memory
Before first use HF-1471 in THOS-1 operating system, memory must be formatted with system data structure loaded into segment 0. Both source code [1] and binary [2] are provided. In this template few things can be optionally entered: 32-bit VOLUME ID (offset 02-05), MM module number, this is my system to enumerate memory modules (offset 0xE0) and VOLUME_NAME (offset 0xF0) which is typically HF project number.
If choosen drive is not formatted properly THOS-1 will respond with 0x90 error code (DRIVE_NOT _READY).
Sources:
[1] 2490.ASM
[2] 2490.BIN
Prefix 15
HF Register
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