Posted By
Litwr
on 2016-05-22
04:39:53
|  Re: Ultimate Map V1.9
I've not found any eggs but several points for critisism:
1) why do ROM calls use not proper names? The best source for +4 information is Programmer's Reference Guide for the Commodore Plus/4, it uses the different names for a lot of functions. BSOUT, BASIN, READSS, ... have in SVS ROMmap the different names. 
2) some information is odd, it looks like a kind of wrong based conclusions. For example, UDTIM and RDTIM calls are described as 60 Hz for NTSC and 50 Hz for PAL... The raster interrupt frequency are different for PAL and NTSC but the timer value is always 60 Hz based. PAL systems use value at $7fd to recalculate 50 Hz ticks into 60 Hz. So UDTIM is called 60 times per second on the PAL and NTSC systems. BTW the value $4F1A01 which means 24h:00':01" is common for PAL and NTSC.
3) some important information is missed. For example, READSS sets the zero flag if there is an error... It is documented the mentioned reference.
I am often using the fine SVS ROMmap so the only aim of this post is to help to make this map even more fine.  The only way to evade any critics for the job done is doing no job at all. 
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