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5160 BIOS Source Code

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    #31
    Just wanted to give a quick update on this. I removed all my previous keyboard "hacks" and am working on doing a proper implementation for enhanced keyboard support, so that all programs work correctly. Running into some free ROM space issues so I am having to optimize other areas to free up room. Anyway it's taking longer than I thought it would but I will post when it's done.

    Comment


      #32
      Originally posted by Plasma View Post
      Just wanted to give a quick update on this. I removed all my previous keyboard "hacks" and am working on doing a proper implementation for enhanced keyboard support, so that all programs work correctly. Running into some free ROM space issues so I am having to optimize other areas to free up room. Anyway it's taking longer than I thought it would but I will post when it's done.
      Cool, I'll be patient.
      Are you trying to keek it to 8K?
      No wonder the later IBM Bios versions were about 32K.

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        #33
        Yes it will still be 8K. I think it's possible since a lot of the hardware tests that the IBM BIOS does are omitted.

        Comment


          #34
          Ok, new version is up! Sorry it took so long, been crazy busy...

          I didn't have time to test with the network client so let me know if it's still causing problems.

          Comment


            #35
            Awsome! I'm gettin' my EPROM programmer out right now. I'll let you now the outcome, possibly as soon as tonight

            Comment


              #36
              Just curious--how closely does this adhere to the original IBM PC standards? For example, the INT 13H diskette service entry at F000:E3FE or int 1AH at F000:FE6E. Evidently, both IBM and Phoenix (and I assume Award) thought it was important to carry it along as BIOSes advanced.
              Reach me: vcfblackhole _at_ protonmail dot com.

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                #37
                Originally posted by ibmapc View Post
                Awsome! I'm gettin' my EPROM programmer out right now. I'll let you now the outcome, possibly as soon as tonight
                So far so good. I have not been able to find anything that won't run with the new version. There is onr thing that needs a Cntrl-Alt Del before it will run. SMS.COM is the uttillity that changes the mode on my EGA Wonder. If I type SMS /ENAB (enables advanced features of the card) immediatly after power on, the system freezes. If I do the three finger salute before executing the command, it works fine. Other than that I can't find any problems. I'll keep trying.
                Last edited by ibmapc; April 24, 2012, 04:25 PM.

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                  #38
                  Originally posted by Chuck(G) View Post
                  Just curious--how closely does this adhere to the original IBM PC standards? For example, the INT 13H diskette service entry at F000:E3FE or int 1AH at F000:FE6E. Evidently, both IBM and Phoenix (and I assume Award) thought it was important to carry it along as BIOSes advanced.
                  It should have all the expected PC/XT entry points. Int 13h is at F000:EC59. AFAIK F000:E3FE is the AT entry point for Int 13h if a hard drive is present.

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                    #39
                    Originally posted by ibmapc View Post
                    So far so good. I have not been able to find anything that won't run with the new version. There is on thing that needs a Cntrl-Alt Del before it will run. SMS.COM is the uttility that changes the mode on my EGA Wonder. If I type SMS /ENAB (enables advanced features of the card) immediatly after power on, the system freezes. If I do the three finger salute before executing the command, it works fine. Other than that I can't find any problems. I'll keep trying.
                    Ok. I will take a look at sms.com and see if I can figure out what it's doing.

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                      #40
                      If I understand this BIOS correctly, you would lose the Cassette functionality provided by Int 15 on the IBM PC 5150 by inserting this ROM. Of course, you could also program the cassette recorder directly, but I would think that the BASIC ROMs call Int 15.
                      My Retro Computing and Vintage Gaming Blog : http://nerdlypleasures.blogspot.com/

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                        #41
                        That is correct. I am actually working on an "expansion" BIOS for the 5150 that will plug into U28 and give you HD floppy support and cassette support/emulation. The cassette emulation supports FAT12 so you can read/write files to floppy disk using ROM BASIC.

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                          #42
                          Originally posted by ibmapc View Post
                          So far so good. I have not been able to find anything that won't run with the new version. There is onr thing that needs a Cntrl-Alt Del before it will run. SMS.COM is the uttillity that changes the mode on my EGA Wonder. If I type SMS /ENAB (enables advanced features of the card) immediatly after power on, the system freezes. If I do the three finger salute before executing the command, it works fine. Other than that I can't find any problems. I'll keep trying.
                          So I tried sms.com and can't get it to freeze...but I don't have an EGA Wonder. Tried my VGA Wonder and still no luck.

                          Do you have anything starting up in your autoexec.bat/config.sys before you attempt to run sms? If you boot the computer up but hit ctrl+alt+del before DOS loads does sms still work? When sms freezes does the computer need a hard reboot or does ctrl+alt+del still work?

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                            #43
                            Originally posted by Plasma View Post
                            Do you have anything starting up in your autoexec.bat/config.sys before you attempt to run sms?
                            It freezes even with a clean boot, no config.sys or autoexec.bat.

                            If you boot the computer up but hit ctrl+alt+del before DOS loads does sms still work?
                            No, Dos needs to load complete and then ctrl+alt+del . Then SMS ENAB will work.

                            When sms freezes does the computer need a hard reboot or does ctrl+alt+del still work?
                            If ctrl+alt+del is issued after it freezes then occasionaly ,not every time, "PPARITY ERROR AT ????"(yes that is two P's) is repeatedly displayed, and the system must be powered down to recover. I'm thinking the video memory is not blanked completely untill reset since were not checking video mem on EGA. Note that other functions of SMS work fine, only SMS ENAB freezes the system.

                            One thing I've noticed. With Your BIOS, the Video Bios message is displayed, then the Hard Drive controller bios message, then Super XT Bios Message and it starts counting memory.

                            With the IBM Bios, The Video Bios message is displayed, then the memory counts, then the Hard Disk Bios message, Then boot. I wonder if the order of things affects the way the EGA Wonder is initialized?

                            Thannks for your continued support!!

                            Greg

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                              #44
                              What version of DOS are you using?

                              The EGA BIOS should be initializing the video memory. The IBM BIOS doesn't check video memory on the EGA either since it is not EGA-aware.

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                                #45
                                I'm using PC DOS 7.0

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