Zero Pain info

I presume the latest softload version of RO for the ‘Iyonix’ is High vector – !Zap seems to be giving a few errors :-(

Could there be a easy way of telling which version is in use :-
(Hi/Low) vectors.

Perhaps a ‘z’ added after the version number – for ‘Zero Pain’.

Like version 5.23z – for Hi vector.

Try this simple programme (see Archive 24:1 page 24):

10 REM >HiVector
20 hv%=1
30 ON ERROR hv%=0:IF ERR=&1E6 THEN PRINT "Before RISC OS 3.70"
40 IF hv% THEN SYS "OS_PlatformFeatures",0 TO hv%
50 IF hv% AND (1<<20) THEN PRINT "High vectors" ELSE PRINT "Low vectors"

All Iyonix ROMs since 2015-07-05 have high vectors by default, so chances are indeed that that’s the case. But the code above will prove it :)

!Zap prevokes an error in module ‘International’ when creating a BASIC file.

Location: Offset 00000790 in module International
Current Wimp task: Zap

R0 = 0000004c R1 = 00000043 R2 = 00000000 R3 = 00000000
R4 = 00000000 R5 = 00000ffb R6 = fc23196a R7 = 207b6218
R8 = 0002de00 R9 = fc231314 R10 = 00000043 R11 = 3003717c
R12 = 30002dd4 R13 = fa207fbc R14 = fc0191ec R15 = fc23164c
DFAR = 00000000 Mode SVC32 Flags nzcv if PSR = 00000013

STMDB R13!,{R0,R2,R5,R6,R14}
ADR R6,&FC231808
MOV R2,R3
LDRB R0,[R6],#1
TEQ R0,#0
LDMEQIA R13!,{R0,R2,R5,R6,PC}
*LDRB R5,[R2],#1
CMP R5,#&20 ; =" "

As a follow up – thanks for pointing out the bit of code from Archive mag.
Now have a prog called ‘Zero’ in !Boot.Libary – which can be called from the command line.
RO 5.23 (09-Aug-16) low vectors.

Using a zero pages protecter 32bit prog by Andreas Feldner for years – which catches reads/writes to the zero pages.

0 = do nothing
1 = catch writes
2 = catch reads

Usually in 1 – but have just tried it in 2.

OS seems ok – but during boot – gives an error from !UnixHome ‘SetHome’ which seems to be reading from one of the lower pages. &E8D4-8

ldmia r2,{r0,r1}

r2 = &ADC Mode=USR32

!Zap where do you start!! doesn’t like ‘catch reads’.