-----Original Message-----
From: Alistair Riddoch <[EMAIL PROTECTED]>
To: Giles Russell <[EMAIL PROTECTED]>
Cc: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
Date: Tuesday, November 23, 1999 7:35 AM
Subject: Re: Questions
>Giles Russell writes:
>>
>> Can someone please tell me what these mean for the help :)
>>
>> ROM_SETUP_CODE
>
>Code segment location for the setup code when programmed into a ROM. This
>is usually the base segment address of the ROM.
>
>> ROM_KERNEL_CODE
>
>Code segment location for the kernel code when programmed into a ROM. This
>is usually the base segment address of the ROM + 0x60.
>
>> ROM_SETUP_DATA
>
>Segment location in RAM where the setup code keeps the values it is going
>to pass to the kernel.
>
>> ROM_KERNEL_IRQDATA
>
>Segment location of an absolute area of RAM where the kernel stores certain
>variables that it must be able to access when it does not know where its
>data segment is.
>
>> ROM_KERNEL_DATA
>
>Segment location of the kernels data segment, used only when the kernel
>image is in ROM.
>
>> ROM_CHECKSUM_SIZE -- Is this size or an offset value ????
>
>Size of the ROM image to be prepared. This value is stored in the ROM
>header, and the whole ROM must checksum to zero.
>
>> ROM_USE_ORG_INTMASK
>
>Force the irq system to read in the original interrupt mask before it
starts
>sorting out interrupts. By default the kernel disables all interrupts. This
>should only be used by kernel hackers.
>
>> ROM_CONFIG_8253
>>
>
>Appears to be unused.
>
>Al
>
IMHO, and if my rusty RAM serves, an 8253 was the normal serial chip on the
old CP/M and early DOS machines.
Bruce
