[sebhc] h17 and h8d disk images

Steven Parker sp11 at hotmail.com
Wed Sep 1 14:15:49 CDT 2004

Dave says:
>Then we don't have to maintain two copies of everything.

We don't .. all the new submissions are in the .h8d format.  And we have 
'disktool' to do conversions.

>Also, I've got it in my mind to modify the emulator so that it can boot
>CP/M ... Presumably I need to add the "RAM at 0" option ... anything else
>needed?  I don't have any technical info on this - can someone give me a

I did already!   Here's an excerpt from the previous message:

>From: "Steven Parker" <sp11 at hotmail.com>
>To: sebhc at sebhc.org
>Subject: Re: [sebhc] Emulator fixes / additions
>Date: Wed, 26 May 2004 23:52:17 +0000
>Even with XCON, on reset you need to switch the rom(s) back on.  After the
>I/O port, the only other thing you'd need for XCON is a way to set the boot
>control switch positions that it reads (cmd line parms?).  I attached a
>mtr.acm excerpt to the end of this mail with the port and bit definitions.

(rest of message omitted here)

>**      I/O Ports
>IP.CON  EQU     362Q            H-88/H-89/HA-8-8 Configuration
>OP2.CTL EQU     362Q            H-88/H-89/HA-8-8 Control Port
>**      Front Panel Control Bits
>*       CB2.* set in OP2.CTL
>CB2.SSI EQU     00000001B       Single Step Interrupt
>CB2.CLI EQU     00000010B       Clock Interrupt Enable
>CB2.ORG EQU     00100000B       ORG 0 Select
>CB2.SID EQU     01000000B       Side 1 Select
>**      Configuration Flags
>*       These bits are read in IP.CON
>CN.174M EQU     00000011B       Port 174Q Device-Type Mask
>CN.170M EQU     00001100B       Port 170Q Device-Type Mask
>CN.PRI  EQU     00010000B       Primary/Secondary:  1=>primary == 170Q
>CN.MEM  EQU     00100000B       Memory Test/Normal Switch:  0=>Test; 
>CN.BAU  EQU     01000000B       Baud Rate:  0=>9600; 1=>19,200
>CN.ABO  EQU     10000000B       Auto-Boot:  1=>Auto-Boot
>CND.H17 EQU     00B             H-17 Disk,            Valid only in CN.174M
>CND.NDI EQU     00B             No Device Installed,  Valid only in CN.170M
>CND.H47 EQU     01B             H-47 Disk

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