The Flashdisk; What Does A Flash-File-System; Usable Dos Size Of A Flash-File-System; Used Memory Window - DIGITAL-LOGIC MICROSPACE PC/104 Technical User's Manual

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9.3

The Flashdisk

9.3.1 What does a Flash-File-System

The Flash-File-System allows you to READ and WRITE information to and from the flashdisk, without
limitation.

9.3.2 Usable DOS size of a Flash-File-System

Depending on the MICROSPACE product, different sizes and types are supported:
On the Flashdisk, the real usable capacity must be smaller than the installed devices, due to the spare
sector of 64kByte and the memory area used by the FFS.
onboard
1024k installed flash

9.3.3 Used Memory Window

The FFS software uses a 64k memory window at E000-EFFF (ELAN300:D000-DDFFF) to transfer
data to and from the flashdisk.

9.3.4 Enable Flashdisk

In the BIOS Setup the Floppydrive B: must be selected to 360k for enabling the flashdisk.

9.3.5 How to format the Flashdisk C:

Use the program DLFMT.EXE to format the flashdisk as follows:
Transfer the system with SYS A: C:
For further information refer to the FFS-MANUAL!

9.3.6 Direct Solid State Disk access (Flashdisk)

This section is for solid state disk driver-programmer.
- the flash is not linear addressable.
- write to the flash: protection & write command cycle, see AMD flash datasheet AM29F040
- the SSD memory window is at 0E0000-0EFFFF
- to switch the page use the I/O address 0201 (write only) bit1..4
MSM486dx / Function:
MSM5x86
WDOG-ENA 0=dis., 1=enable
SSD-A16 LSB
SSD-A17
SSD-A18
SSD-A19
EEPROM Clock
EEPROM Data Output
EEPROM Select (active low)
usable DOS size
usable DOS size = 896 kByte
Bit Number:
0
1
64 kB
2
Solid State Disk (SSD)
3
page selection
4
5
6
7 (=1 default -> EEPROM not select)
DLFMT C: [ENTER]
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MSM486V Manual V3.22