PICAXE VSM history.

Please note the PICAXE VSM Model version is shown in the simulation log,
not the Help>About box of ISIS (which shows the ISIS revision only)

1.0.4 19.01.2009
Upgraded ISIS core to
	- greatly enhance simulation speed
	- reduce convergence and step errors
	- improved simulation accuracy
	- added hundreds of new parts
	- add colour coding syntax for BASIC program
Modified models to use universal PICAXE compilers
Modified models to improve power rail modelling 
Fixed issue with nap not parsing correctly
Fixed issue with hi2cout not outputting first byte
Fixed issue with 28X1 code usage report locked at 256
Fixed issue with last lookdown value not being checked
Fixed issue with stop bit polarity of serout/sertxd
Added support for PICAXE-18M
Added support for 'readoutputs' value on 28X1
Added support for 'readportc'' on 28X1
Fixed various issues with portc simulation on 28X1/40x1
Fixed compiler issue with 'on gosub' code line numbers
Fixed compiler issue with 'select case' code line numbers
 Note that as 'on.gosub' and 'select case' are pseudo commands
 they require more than one click on the 'step' button to
 step. This is normal behaviour, because the PICAXE is 
 processing mutiple if/goto commands for each 'pseudo' command.


v1.0.3
Fixed issue with pulsin command at certain frequencies

v1.0.2
Fixed bug with 'let dirs =' when compiler optimised
Now cleans up compiler generated temporary files upon syntax error
Fixed issue with MIN and MAX operation
Fixed issue with bit variables not correctly updating b0/b1
Fixed issue with b12-b13 not correctly updating w6
Fixed ADC issues with 20M model

v1.0.1
Fixed invalid PC issues when using peek and poke
Fixed 'OE3' issue on 20M

v1.0.0
First release