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- Date: Friday, 17 February 1984 09:54-MST
- From: King Ables <ables at ut-ngp.ARPA>
- To: h19-people at mit-mc.ARPA
- Re: solution to my H89 problems
-
- Well after hearing from people who seems to know as much or
- more about H89s than Heath and after calling Heath again, I
- think I have solved the problem.
-
- When I ordered CP/M the first time and it didn't work, I called
- Heath and they said "Oh, yeah, you need a hardware upgrade!"
- So I did the following:
-
- 1) Replaced the 444-42 in U517 with a 444-66
- 2) Connect a jumper from the middle pin of U503 to pin 17 of P509
- They assured me this would work. However, to make the full upgrade,
- I could also do:
- 3) Replace the 444-40 in U518 with a 444-62
- 4) Replace the 444-43 in U550 with a 444-61
- If I did this, I would lose cassette capability. Since this wasn't
- necessary (they said) I decided to just do 1 & 2.
-
- When I did this and it still didn't work, I called Heath again. They
- said it should have worked and my disk must be bad. So they sent me
- a new disk..guess what, still didn't work. Then they say hardware
- problem with the disk drive. That's when I put my problem on the net.
- Mr. D. C. Finch of Phoenix was kind enough to write me a letter
- (they have R/O access to the net) which told me that indeed 3 & 4
- were necessary (at least for CP/M 2.2.03 and later). So this morning
- I called Heath again and they said, "That's right, you have to replace
- all three chips!" Just wish they had said that back in November!!
- I'll be happy to give anyone the details of Mr. Finch's letter if
- asked, I don't think most people are that interested.
-
- Thanks to all those who replied, I am convinced that people on the net
- are more valuable than Heath's consulting department. At least
- I get a correct answer the first time on the net! Too bad Heath
- doesn't list hardware upgrades and long distance charges in their
- catalog along with the price of the item!
-
- --King Ables
- USMail: Computation Center, Univ. of Texas, Austin, Texas 78712
- ARPA: ables@ut-ngp
- UUCP: {ctvax,ihnp4,kpno,seismo}!ut-sally!ut-ngp!ables
-