Re: [hatari-devel] Re: [Emutos-devel] Aranym blitter

[Christian Zietz <czietz@xxxxxxx>]

Nicolas Pomarède schrieb:

> BTW christian, in the different tests you made, we saw that sometimes 
> nothing is written in dest. Could you add the number of words 
> read/written to the output of your test program ? (by subtracting start 
> source/dest address to end source/dest address). Maybe sometimes nothing 
> is written to dest but words are still read anyway ?

The new test program and its result on my "Blitterized" STFm are
attached. Note that NR (number *read*) and NW (number *written*) are --
like you suggested -- just the difference between addresses before and
after using the Blitter, divided by 2, i.e. expressed in 16-bit words.
Hence, NR=20 doesn't neccessarily mean that 20 words were read, most
likely every 2nd word was skipped. (One would have to use a logic
analyzer on the bus to see the actual bus cycles.)

Also, there are no separate 68000 and 68030 of the test program anymore.
It now disables the cache on a 68030, but still runs on a plain 68000
without crashing with invalid instruction.

Regards
Christian
-- 
Christian Zietz  -  CHZ-Soft  -  czietz@xxxxxxx
WWW: http://www.chzsoft.de/
PGP/GnuPG-Key-ID: 0x52CB97F66DA025CA / 0x6DA025CA

Attachment: BLITEMU.TOS
Description: Binary data

>>>>> OP = 1 <<<<<

SRC_INC = DST_INC = +2, FXSR = 0, NFSR = 0

0 1 2 3 4 5 6 7 8 9 -1 -1 -1 -1 -1 -1 RD=10 WR=10



SRC_INC = DST_INC = +2, FXSR = 0, NFSR = 1

-1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 RD=10 WR=10



SRC_INC = DST_INC = +2, FXSR = 1, NFSR = 0

1 3 5 7 9 11 13 15 17 19 -1 -1 -1 -1 -1 -1 RD=20 WR=10



SRC_INC = DST_INC = +2, FXSR = 1, NFSR = 1

-1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 RD=20 WR=10



SRC_INC = DST_INC = -2, FXSR = 0, NFSR = 0

-1 -1 -1 -1 -1 -1 55 56 57 58 59 60 61 62 63 -1 RD=10 WR=10



SRC_INC = DST_INC = -2, FXSR = 0, NFSR = 1

-1 -1 -1 -1 -1 -1 54 55 56 57 58 59 60 61 62 63 RD=10 WR=10



SRC_INC = DST_INC = -2, FXSR = 1, NFSR = 0

-1 -1 -1 -1 -1 -1 45 47 49 51 53 55 57 59 61 63 RD=20 WR=10



SRC_INC = DST_INC = -2, FXSR = 1, NFSR = 1

-1 -1 -1 -1 -1 -1 44 46 48 50 52 54 56 58 60 62 RD=20 WR=10

>>>>> OP = 3 <<<<<

SRC_INC = DST_INC = +2, FXSR = 0, NFSR = 0

0 1 2 3 4 5 6 7 8 9 -1 -1 -1 -1 -1 -1 RD=10 WR=10



SRC_INC = DST_INC = +2, FXSR = 0, NFSR = 1

0 1 2 3 4 5 6 7 8 9 -1 -1 -1 -1 -1 -1 RD=10 WR=10



SRC_INC = DST_INC = +2, FXSR = 1, NFSR = 0

1 3 5 7 9 11 13 15 17 19 -1 -1 -1 -1 -1 -1 RD=20 WR=10



SRC_INC = DST_INC = +2, FXSR = 1, NFSR = 1

1 3 5 7 9 11 13 15 17 19 -1 -1 -1 -1 -1 -1 RD=20 WR=10



SRC_INC = DST_INC = -2, FXSR = 0, NFSR = 0

-1 -1 -1 -1 -1 -1 55 56 57 58 59 60 61 62 63 19 RD=10 WR=10



SRC_INC = DST_INC = -2, FXSR = 0, NFSR = 1

-1 -1 -1 -1 -1 -1 54 55 56 57 58 59 60 61 62 63 RD=10 WR=10



SRC_INC = DST_INC = -2, FXSR = 1, NFSR = 0

-1 -1 -1 -1 -1 -1 45 47 49 51 53 55 57 59 61 63 RD=20 WR=10



SRC_INC = DST_INC = -2, FXSR = 1, NFSR = 1

-1 -1 -1 -1 -1 -1 44 46 48 50 52 54 56 58 60 62 RD=20 WR=10

Total Blitter iterations: 16