Varvara Ordinator, written in ANSI C(SDL2)
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commit fa91704ef9a5fdb699c015c69879f5f2099b06f8
parent 3b9519d945d8e9b8752efb97e9ce17e80078384e
Author: Andrew Alderwick <andrew@alderwick.co.uk>
Date:   Sun, 16 May 2021 08:46:03 +0100

Prevented infinite loop when asma's output is empty

Mprojects/software/asma.usm | 5+++++
1 file changed, 5 insertions(+), 0 deletions(-)

diff --git a/projects/software/asma.usm b/projects/software/asma.usm @@ -46,12 +46,17 @@ DEO2 instruction to 0x00ff. In order to execute File/load and have the CPU continue at memory location 0x0100, we write the final DEO2 instruction there and jump there as our final act. + + Just in case the assembled code is zero-length (which can occur when + assembling an empty source file), we write a BRK to the reset vector so + that will prevent an infinite loop. ) ;&dest-file .File/name DEO2 #0000 .File/offset DEO2 #ff00 .File/length DEO2 #0100 .File/load LIT DEO2 #00ff STA + LIT BRK #0100 STA #00ff JMP2 &source-file