S y s t e m m a n a g e m e n t c a r d s
13/3
When the port is written, the DiagP must be informed through an interrupt
line (PORT80_IRQ).
When the DiagP reads the port, the interrupt line must be automatically reset.
BIOS Page Register 120h (write only)
This controls the BIOS and SRAM paging. All bits are cleared on reset.
When the Flash disk/SRAM decoding is disabled, the BIOS has a page size
of 32 Kbytes. Bit 4 of the Control Register = 0.
Bits
Function
7:3
n/a
2:1
BIOS page (0 - 3)
0
n/a
When Flash disk/SRAM decoding is enabled, the BIOS has a page size of 16
Kbytes. Bit 4 of the Control Register = 1
Bits
Function
7:3
n/a
2:0
BIOS page (0 - 7)
DOS Flash Page Register 121h (write only)
This controls the Flash disk paging. All bits are cleared on reset.
Bits
Function
7:0
Flash disk page (0 - 255)
Control Register 122h (R/W)
This contains miscellaneous control bits. All bits are cleared on reset.
Bits
Function
7:6
IRQ select for COM port:
00 = No IRQ selected
01 = IRQ10
10 = IRQ14
11 = IRQ15
5
Management UART address: 0=COM3: 1=COM4
4
Enable DOS Flash/SRAM decode: 1=enable
3
Enable DOS Flash write: 1=enable
2
Enable BIOS Flash write: 1=enable
1:0
IRQ select for Diagnostic UART:
00 = No IRQ selected
01 = IRQ10
10 = IRQ14
11 = IRQ15
Summary of Contents for APRICOT FT4200
Page 1: ...FT4200 Owner s Handbook NATIONAL ACCREDITATION OFCERTIFICATION BODIES ...
Page 2: ...APRICOT FT4200 OWNER S HANDBOOK ...
Page 10: ...APRICOT FT4200 Section One Startup and operating Upgrading and expansion ...
Page 36: ...APRICOT FT4200 Section Two Detailed service Information for authorised engineers ...