--- John B <dylanb(a)sympatico.ca> wrote: I look forward to it. I'm back in the swing myself... I worked on the -8/e for several hours last night (and gave a tour to friends). I even powered up a couple of -8/L's to see how they were (mis) behaving. One has a bad M220 card (can't load one of the MA bits from the switch register, but incrementing the address does work), neither works perfectly (and a third is sans core :-( ) I'm taking my Tek 465 and a TTL/CMOS IC tester out to the computer barn to further my efforts. I built a cable with a DIP header on one end and a DIP test clip on the other so I can quickly test M-series flip chip (at least the simple ones like the M111, M113, M216, etc.) I have to scope out the complicated ones like the M706/M707 I/O cards, the M220 register cards, etc. Ah... I just wrote one of those... BTW, your mem test program has a typo... the 7064 instruction (LAS) should be 7604. It threw me for a while until I could get things sqare. I'm still re-learning machine code. I didn't notice that 7064 _couldn't_ be the LAS instruction (wrong group). My TTY banger has an extra feature for the -8/e - it counts characters in the MQ register: 0200 7604 CLA OSR ; Clear AC and OR in switch register 0201 6046 TLS ; Output char and clear transmit flag 0202 6041 TSF ; Skip on TTY flag 0203 5202 JMP 0202 ; Jump back repeat TTY flag test 0204 7521 SWP ; Exchange AC and MQ 0205 7001 IAC ; Increment AC 0206 7521 SWP ; Exchange AC and MQ again 0207 5200 JMP 0200 ; Repeat entire exercise While I'm on the topic of ONMIBUS TTY cards, does the M8650 *require* hardware handshake? -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Thousands of Stores. Millions of Products. All in one place. Yahoo! Shopping: http://shopping.yahoo.com