Kevin Moore wrote:
I hooked up my fluke 9010 and did a bus check, I'm assuming that would be the easiest/fastest way to do a busy check on the board. Results came back good.
Now fi I read your email correctly, you want me to use a different memory location. That makes sense.
However the memory maps have always confused me a bit.
The game is using AM9016EPC memory, which I'm having a problem finding a datasheet for atm.
HEX R/W D7 D6 D5 D4 D3 D2 D2 D0 function
17 ---------+-----+------------------------+------------------------ 18 0000 D D D D D D D D XCOORD 19 0001 D D D D D D D D YCOORD
20 0002 D D D BIT MODE DATA 21 ---------+-----+------------------------+------------------------ 22 0003-033F D D D D D D D D Working RAM
23 0340-3D3F D D D D D D D D Screen RAM 24 3D40-3FFF D D D D D D D D Working RAM 25 ---------+-----+------------------------+------------------------
26 4000-403F R D D D D D D D D EARD* read from non-volatile memory 27 ---------+-----+------------------------+------------------------
28 5000 R D coin AUX (CTRLD* set low) 29 5000 R D coin LEFT (CTRLD* set low)
30 5000 R D coin RIGHT (CTRLD* set low) 31 5000 R D SLAM (CTRLD* set low)
32 5000 R D SPARE (CTRLD* set low) 33 5000 R D SPARE (CTRLD* set low)
34 5000 R D COCKTAIL (CTRLD* set low) 35 5000 R D SELF-TEST (CTRLD* set low)
36 5000 R D D D D HDIR (CTRLD* set high) 37 5000 R D D D D VDIR (CTRLD* set high) 38 ---------+-----+------------------------+------------------------
39 5001 R D SHIELD 2 40 5001 R D SHIELD 1 41 5001 R D FIRE 2
42 5001 R D FIRE 1 43 5001 R D SPARE (CTRLD* set low) 44 5001 R D START 2
45 5001 R D START 1 46 5001 R D VBLANK 47 ---------+-----+------------------------+------------------------
48 6000-600F W D D D D base_ram* 49 6200-621F W D D D D D D D D COLORAM* 50 6400 W INTACK*
51 6600 W D D D D EARCON 52 6800 W D D D D D D D D STARTLG (planet frame) 53 6A00 W WDOG*
54 ---------+-----+------------------------+------------------------ 55 6C00 W D START LED 1 56 6C01 W D START LED 2
57 6C02 W D TBSWP* 58 6C03 W D SPARE 59 6C04 W D CTRLD*
60 6C05 W D COINCNTRR 61 6C06 W D COINCNTRL 62 6C07 W D PLANET
63 ---------+-----+------------------------+------------------------ 64 6E00-6E3F W D D D D D D D D EARWR* 65 7000-701F D D D D D D D D IOS2* (Pokey 2)
66 7800-781F D D D D D D D D IOS1* (Pokey 1) 67 8000-EFFF R D D D D D D D D ROM 68 -----------------------------------------------------------------
According to this map 0000h and 0001h are x& ycoord and as such may not store data, the RAM starts at 0003h through 3fff. I would run the RAM test from 0003h to 07ffh, then 0800h to 0fffh, then 1000h to 17ffh and so on. Does the game have aworking self test? John :-#)#
2009/11/25 Kevin Moore <talon.k@gmail.com <mailto:talon.k@gmail.com>>
Well I was following the seqeunce given in the manual, which is Address lines, then Data lines, then Ram etc..
I'll run the bus sigs now, and see what I get.
Thanks,
Kevin
2009/11/25 John Robertson <jrr@flippers.com <mailto:jrr@flippers.com>>
Kevin Moore wrote:
Hi all, in my quest to learn more about using these tools, I've actually come up with a problem, and could use a little explanation.
I'm working on a liberator board, and was using the atari cat box. The first two tests in the liberator manual have you check address lines. Well those checked out good. Next was the Data lines. This is where things fell apart, and I'm not sure what I'm seeing.
Punch in address 0000, and write AA check the D0-D7 lines going to the ls245 well half the incoming lines are the wrong state, and the output of the ls245 is non existent. Ie pins 2-9 have no output.
So I hook up my fluke 9010a thinking there may be something wrong with the catbox, since this is the first time I've used it. Did the same basic setup wddis grounded, and Φ0 Φ2 shorted together. Do a write to 0000 with AA and use my logic probe to check. Same results.
Am I to assume Bad memory at location 0000.??
Yes.
Did you do the BUS Test first? That will show if any address or data lines are misbehaving.
If BUS Test is OK, and you get this problem for RAM @ 0000h, then try the next RAM set - say @ 0800h or 1000h (if RAM present - check Memory Map). If other RAM all checks OK, or ANY RAM checks OK, then the RAM @ 0000h is certainly suspect.
If the RAM is 4-bit, then which bits are locked will tell you which RAM to replace.
John :-#)#
-- John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames) www.flippers.com <http://www.flippers.com> "Old pinballers never die, they just flip out"
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-- John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames) www.flippers.com "Old pinballers never die, they just flip out" _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ftp.flippers.com/TTL/TestEquipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/