diff options
| -rw-r--r-- | doc/casm.html | 23 | ||||
| -rw-r--r-- | src/example/vic20.asm | 6 | ||||
| -rw-r--r-- | src/prgout.c | 2 |
3 files changed, 23 insertions, 8 deletions
diff --git a/doc/casm.html b/doc/casm.html index 89a2fe0..aba9611 100644 --- a/doc/casm.html +++ b/doc/casm.html @@ -134,7 +134,7 @@ h2 <div class="legalise"> <p><b>casm</b> is a simple, portable multi-pass assembler</p> -<p>Copyright (C) 2003-2015 Ian Cowburn</p> +<p>Copyright (C) 2003-2024 Ian Cowburn</p> <p>This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -1027,7 +1027,7 @@ An Amstrad CPC CDT file. <a href="#prgout">prg</a> </td> <td class="def"> -A Commodore 64 PRG file. +A Commodore 64 or VIC-20 PRG file. </td></tr> <tr><td class="cmd"> @@ -1554,7 +1554,7 @@ code. </table> -<h3 id="prgout">C64 PRG Output Format</h3> +<h3 id="prgout">C64/VIC-20 PRG Output Format</h3> <p> Generates a PRG file for an emulator or real hardware. </p> @@ -1567,18 +1567,18 @@ have been used, in which case then each entry in the tape file will use the <p>All banks will have a small BASIC program inserted as part of the generated file. For this reason the bank should start near the BASIC -area (0x820 should be a safe place to start) unless you have a great +area (0x820 should be a safe place to start for the C64) unless you have a great desire for a PRG full of zero bytes. This BASIC will simply hold a SYS command to start the machine code, e.g. </p> <pre class="codeblock"> -10 SYS 2080 +10 SYS2080 </pre> -<h4>C64 PRG Output Format options</h4> +<h4>C64/VIC-20 PRG Output Format options</h4> -<p>The C64 PRG output driver supports the following settings that can be +<p>The PRG output driver supports the following settings that can be set via an <b>option</b> command. </p> @@ -1595,6 +1595,15 @@ The start address for the generated BASIC loader. If left undefined defaults to the start of written memory in the bank. </td></tr> +<tr><td class="cmd"> +option prg-system, <c64|vic20|vic20+8k> +</td> +<td class="def"> +The system to generate the PRG file for, either a Commodore 64 (<b>c64</b>), +VIC-20 either unexpanded or with 3K expansion (<b>vic20</b>) or a VIC-20 with +an 8K or 16K expansion (<b>vic20+8k</b>). +</td></tr> + </table> diff --git a/src/example/vic20.asm b/src/example/vic20.asm index 8bb222d..2da53a2 100644 --- a/src/example/vic20.asm +++ b/src/example/vic20.asm @@ -18,6 +18,12 @@ main: loop: sta 36879 adc #1 + pha + jsr $ffe4 + beq nokey + rts +nokey: + pla jmp loop start: diff --git a/src/prgout.c b/src/prgout.c index da14cae..39b70e1 100644 --- a/src/prgout.c +++ b/src/prgout.c @@ -19,7 +19,7 @@ ------------------------------------------------------------------------- - Commodore T64 tape output handler. + Commodore PRG output handler. */ #include <stdlib.h> |