Article View: comp.sys.amiga.tech
Article #4275A2620 with 2.0
From: mr c.r. hames
Date: Sun, 08 Jul 1990 14:19
Date: Sun, 08 Jul 1990 14:19
40 lines
2088 bytes
2088 bytes
How do you get Kick2.0 working with A2620 board ? I have tried to
get the MMU to think it is at $F80000 - $FFFFFF working from the source
to SetCPU 1.4 but it never seems to work. SetCPU 1.5 doesn't seem to come
with source even though the description of the fish disk says it does, I
have got it from two sites and no source was included.
Is there a util I should be using? SetCPU 1.6 out? If not what could
I be doing wrong.:-
I load the 512K in to RAM - tried CHIP & 32FAST
Set up a table like in SetCPU 1.4 except the last four entries
are modified for the ROM instead of last two.
Then I do basically the same as SetCPU V1.4 for FASTROM.
for (i = 0; i < 125; i++) MMUTable[i] = PD_ADDR(i<<17)|PD_DT_PAGE;
MMUTable[124] = PD_ADDR((ULONG)ROM32)|PD_WP|PD_DT_PAGE;
MMUTable[125] = PD_ADDR(((ULONG)ROM32)+0x20000L)|PD_WP|PD_DT_PAGE;
MMUTable[126] = PD_ADDR(((ULONG)ROM32)+0x40000L)|PD_WP|PD_DT_PAGE;
MMUTable[127] = PD_ADDR(((ULONG)ROM32)+0x60000L)|PD_WP|PD_DT_PAGE;
myCRP[0] = CRP_LIMIT(127)|0x200|0x2;
myCRP[1] = (ULONG)MMUTable; /*^ I thought 0x200 should be 0x400 */
/* But this gives me GURU */
SetCRP(myCRP);
myTC = TC_ENB|TC_PS(0x0c)|TC_IS(wrapbits)|TC_TIA(0x0f-wrapbits)
|TC_TIB(0x05)|TC_TIC(0)|TC_TID(0);
SetTC(myTC);
After this I have tried reset(by offical method & other ways),
jmp $f80002,keyboard reset etc
--
Chris Hames: ins778u@vax4.cc.monash.edu.au(internet)
C/Assembler!: Freely Avail: VMK,DirWork,FSDirs......(Fish etc)
Commercial: Classified.
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!samsung!munnari.oz.au!bruce!monu1!vax4.cc.monash.edu.au!ins778u From: ins778u@vax4.cc.monash.edu.au (mr c.r. hames) Newsgroups: comp.sys.amiga.tech Subject: A2620 with 2.0 Message-ID: <3562@monu1.cc.monash.oz> Date: 8 Jul 90 14:19:26 GMT Sender: news@monu1.cc.monash.oz Organization: Monash Uni, Clayton, Vic 3168, Australia Lines: 40