ARPAVAX:C70:info-cpm (09/14/82)
>From tj@Okc-Unix Tue Sep 14 03:06:44 1982
memory test for what??? 8080? z80? 8085? different
processors put different constraints on their dynamic rams.
my system is a z80 and when I upgraded my 2 Mhz cpu to 4 Mhz,
my "memory test" (supplied in my monitor provided my SD Systems)
said that my memory Worked Perfectly. But for some reason, My
system would no longer boot. It might sometimes do a partial boot
before croaking or once in a while, it might even get to the cpm
login message before dying. Came to find out later, after several
fistfuls of hair, that the instruct fetch and data fetch cycles for
a z80 were not the same length. instruction fetches were faster (beats
me why) so while normal memory tests might work, the placing of
accual code in that memory and then jumping to it might not.
so, now ask, what kind of memory test do ya want now?
tjARPAVAX:C70:info-cpm (09/14/82)
>From UCBARPA.dag@Ucb-C70 Tue Sep 14 03:45:12 1982
Received: from UCBARPA.BERKELEY.ARPA by UCBVAX.BERKELEY.ARPA (3.198 [9/12/82])
id A16760; 14-Sep-82 01:25:41-PDT (Tue)
To: tj at Okc-Unix
Cc: info-cpm at BRL
Via: Ucb-C70; 14 Sep 82 4:33-EDT
Via: Brl; 14 Sep 82 4:39-EDT
Via: Brl-Bmd; 14 Sep 82 4:44-EDT
_c
Ooops...sorry...I need the test for a 4mhz Z80...CCS 2810 board CPU,
CCS something else 64K dynamic ram...Morrow DJ2D rev. B controller.
Thanks.
DavidARPAVAX:C70:info-cpm (09/15/82)
>From W8SDZ@Mit-Mc Wed Sep 15 01:24:16 1982
There is a memory test for 8080/Z80 that uses the instruction fetch.
It's called WORM and is available on MIT-MC as AR11:CPM;WORM 21ASM