Harold, check all the jumpers on your Z80 board again against Gary's picture which agrees with my setup except for one jumper (JP9 which is a NC pin on both the 27C64 and 28C64 anyway)
the key jumpers to check are JP8 should be 1-2, P39 should be 7-8 (yours is 3-4), there should be 4 jumpers across P8 to P10 (I cant see these on your picture) also P2 should be jumpered 3-4 (yours looks like 5-6) if this doesn't work would you be able to get a sharper picture uploaded. regards David Fry On Friday, June 12, 2015 at 3:34:57 PM UTC+1, [email protected] wrote: > Thanks for the help. > > I downloaded the HEX file from David and burned it to a 27C64. That seemed > to program okay. Thanks. > I also checked my jumpers against the scan posted by Gary. Thanks. The > only difference that I found was the jumpers related to changing from the > 27C64 to the 28C64 since these chips have different pin outs. > > Now when I power up the Z80 I get a hashtag, #, appearing on the screen of > the console I/O. Not sure what that means but at least I got some response. > I have been using this propeller board for some time now with Josh's 8080 > CPU and it works fine. I checked the jumpers but I used the jumper > configuration that is shown in the build steps on the website. > > So, not sure what to do next. Any ideas would be great. > > On Wednesday, June 10, 2015 at 10:41:45 PM UTC-4, [email protected] wrote: > >> Hi everyone. I just finished building the Z80 board and I am having some >> problems, so I am hoping that some of you have some ideas. >> >> My system is the following: >> V2-S100 Z80 Master CPU board >> 4Meg static RAM board >> Prop I/O board >> >> I have the Z80 board jumpered as master. I also have a simple switch for >> reset. The RAM board is set for 1Meg only at 0000H. >> >> After power has been applied and reset issued the following conditions >> exist: >> >> On the Z80 board the 'BUS Master' LED (D8) turns on along with the 'LOW >> ROM' and 'ROM SEL' LED's >> On the RAM board the 'BS' and 'R0' LED's light up. Also the 8bit read LED >> and the 8bit write LED turn on. >> Unfortunately nothing happens on the screen connected to the prop I/O >> >> I have attached a picture. >> >> I tried to follow the table for the Z80 board jumpers and basically >> followed the examples. >> >> My main concern initially was the ROM monitor program. The only program >> available for downloading is version 5.02 which uses two 4K pages. I am >> using a uv erasable 27C64 instead of the eerom 28C64 that is shown on the >> S100COMPUTERS website. >> I compiled the program as described and generated the master.com file, >> but when I loaded this file onto my eprom burner the code did not match the >> listing! I set the transfer to the buffer at F000H. However, the HEX file >> looked okay, so I used that. Not sure that is right- I haven't burner roms >> for many years. >> >> So If anyone has any ideas or comments that would be great. I am up for >> any suggestions. >> > -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
