Lee Privett wrote:
I was just wondering what would be involved in burning my own EPROM with
my own set of routines for plugging into the ROM port (like TK2), has
anyone done this? what sort of kit is involved and how much are we
talking about here. Also would I have to make my own pcb or can they be
bought/manufactured. This is all for the original QL of course.
The Technical Manual states:
11.4 Add-on Card ROMs
When the machine is booted, the operating system checks for plug-in ROM
drivers by looking for
the characteristic longword flag $4AFB0001 at the base of each location in
which a ROM might
be present. The beginning of a plug-in ROM should be in the following
format:
00 $4AFB0001 (flag to indicate ROM is present)
04 pointer to list of BASIC procedures and functions
06 pointer to initialisation routine
08 string identifying the ROM
The pointers are relative to the base of the ROM. If the list pointer is
zero then there will be no
attempt to link routines into SuperBASIC.
There are also a few tools, which do that for you. There is one from Jochen
Merz, very good and easy to use (Thing & EPROM-Manager) and one from
Liberation Software (RPM-Manager, not do delightful, but working)
Cheers...Ralf
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