3.1.1 UNA_std.rom fails on Mark IV

[sparkybrit]

Dunno if you welcome issues with the 3.1.1 pre-release but I tried UNA on Mark IV and got the following error when booting CP/M from the ROM:-

Welcome to Single Board Computing on the N8VEM SBC Z180 Mark IV running on a Z180 SL1960 retard processor with 512K of RAM and 512K of ROM UNA BIOS version 2.1-45 of 14-Jan-2017. (13)

Copyright (C) 2013-2017 John R. Coffman. All rights reserved. Provided for hobbyist use on the RetroBrew Z80/Z180 boards. This code may be used under the terms of the GNU General Public License version 3, a copy of which is contained in the file COPYING in the top-level source directory.

Do you wish to enter SETUP? [N/y]: Configuring the Z180 SBC Mark IV board: Oscillator: 18.432 Mhz Clock PHI: 18.432 Mhz Effective: 10.24 Mhz

0: RAM- RAMdrive on the Z180 SBC Mark IV board LBASupported UserAddressableSectors 832

1: ROM- ROMdrive on the Z180 SBC Mark IV board LBASupported UserAddressableSectors 768

2: SD- SD SS32G s/n: -719741752 fmw: 8.0 d/c: 2021-05 LBASupported UserAddressableSectors 62333952

Boot UNA unit number or ROM? [R,X,0..2] (R): r

UNA Boot Loader

Boot [H=Help]: c

Loading CP/M 2.2...

CBIOS v3.1.1-pre.174 [UNA]

Configuring Drives...

    A:=RAM0:0
    B:=ROM1:0
    C:=SD2:0
    D:=SD2:1
    E:=SD2:2
    F:=SD2:3
    G:=SD2:4
    H:=SD2:5
    I:=SD2:6
    J:=SD2:7

    1363 Disk Buffer Bytes Free

CP/M-80 v2.2, 54.0K TPA

Bdos Err On A: Bad Sector

[wwarthen]

I do welcome issues related to UNA. I'm afraid that UNA is not regularly tested in the dev branch. I will take a look at this.

Thanks,

Wayne

[wwarthen]

Commit b82ff32 should correct basic UNA functionality. I am going to close this issue, but let me know if the issue is not fixed for you and I will reopen it.

N.B., a full regression test of UNA in the dev branch is needed, but has not yet been completed. Feel free to report additional UNA issues here.

Thanks,

Wayne