From: Scott Baker
to: Herb Johnson
date: Dec 1 2024

Hello Herb. It's great to meet you on the mailing list.

I wanted to pass along this diff of changes that I made to the [Intel MON80] v1.2 monitor to boot it on my [Intel 80/24] board. Some of these are not verified, but are what I believe I saw when visually comparing the PDF to the assembly file. Of the changes below the only ones that I verified are the ones on lines 91, 122-123, and 971..

I also moved DATA from 16*1024, to 64*1024 to match my board, but that's going to be dependent on the particular board, so I left that change out of the diff below.

Scott

$ diff mon80v1.2-scott.asm mon80v1.2.asm
91c91
< MODE  EQU     04EH    ; MODE SET FOR USART
---
> MODE  EQU     04FH    ; MODE SET FOR USART
104,105c104,105
< TTYADV        EQU     027H    ; TTY READER ADVANCE COMMAND
< TTYSTP        EQU     025H    ; TTY READER STOP COMMAND
---
> TTYADV        EQU     037H    ; TTY READER ADVANCE COMMAND
> TTYSTP        EQU     035H    ; TTY READER STOP COMMAND
122,123c122,123
< B9600 EQU     007D    ; RATE FACTOR FOR 9600 BAUD
< B0110 EQU     611D    ; RATE FACTOR FOR 110 BAUD
---
> B9600 EQU     007DH   ; RATE FACTOR FOR 9600 BAUD
> B0110 EQU     611DH   ; RATE FACTOR FOR 110 BAUD
316c316
<       JNZ     ERROR   ; BRANCH IF NO OPTIONS
---
>       JZ      ERROR   ; BRANCH IF NO OPTIONS
971c971
<       JNZ     ECH05           ;0473-CA 7C 04
---
>       JZ      ECH05           ;0473-CA 7C 04
1280,1281c1280,1281
<       LXI     H,JPTB  ; LOAD START OF PROM JUMP TABLE
<       LXI     D,JTBL  ; LOAD START OF RAM JUMP TABLE
---
>       LXI     D,JPTB  ; LOAD START OF PROM JUMP TABLE
>       LXI     H,JTBL  ; LOAD START OF RAM JUMP TABLE