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BIOSR4.ARC
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CONFIG.INF
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1987-04-26
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2KB
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52 lines
The Modified BIOS as set up in these files expects certain hardware in
order to use it.
C-128 CPU
1 to 3 1541/1571's
Ram Expander Cartrige
You must have the Disks supplied in the Digital Research Offer (the one
mentioned in the tear out card in the middle of your System Guide).
First try to assemble the BIOS without making any changes, there should
be no problems. If that is the case then you can try additional changes
in order to configure it to your needs.
The C-128 BIOS is supplied in several modular files, I have commented
most of the changes I have made throughout the code. At the top of each
module I have changed, I have also commented on the changes in the file.
Read the comments, study the code, and read the DRI manual (the back two
sections). This will give you the best understanding of how things fit
together.
When making changes, try to avoid changing more than 1 module at a time,
if you make too many changes at once, debugging will be more difficult.
The current system is defined as thus:
3 1541/1571's, as drives A:, B:, C:
Ram Expander as drive D:
2 printers, one as unit 4, one as unit 5.
unit 4 is PRT-LQ
unit 5 is PRT-MX
Unit 5 is the default selection. To change this change the
definition of the label at the top of the file CXIO.ASM from
08h to 10h.
Modem or printer attached to the user port
6551 serial card attached to the expansion port (the 6551 card has not
been tested for compatibility with the Ram Expander)
Key repeat rate and the 'feel' are set in the CXIO.ASM module
40 column display is not supported.
the label 'NULL40' in CXIO.ASM has been left in order to maintain
compatibility with the modem programs, since several of them depend upon
the RS-232 device parameter block to be at its present position in
DEVTBL:, removing 'NULL40' would change this.
Virtual disk is not supported.
Though I am considering adding it back as drive P:
The Screen Dump is activated by pressing the ALT key
Call me if you have any questions.
dering adding it back as drive P:
The Screen Dump is activated by pressing t