VDP timing analysis tool for MSX - forked (coming soon) https://bitopia.io

Pedro Gimeno 4571df2c2b Delete old entry from .gitattributes to complete the circle		пре 5 година
test_asc2cld	647b0da1b3 Rename test_asc2bas to test_asc2cld	пре 5 година
.gitattributes	4571df2c2b Delete old entry from .gitattributes to complete the circle	пре 5 година
.gitignore	6432468b2b Add test suite for BASIC tokenizer	пре 5 година
LICENSE.md	754265982a Rename LICENSE.txt to LICENSE.md, and add it to USAGE.txt	пре 5 година
Makefile	867b4d7044 Rename bas2cas.py to asc2cas.py	пре 5 година
README.md	754265982a Rename LICENSE.txt to LICENSE.md, and add it to USAGE.txt	пре 5 година
RESULTS.txt	d858288e35 Notes added; minor adjustments	пре 5 година
USAGE.txt	867b4d7044 Rename bas2cas.py to asc2cas.py	пре 5 година
asc2cas.py	867b4d7044 Rename bas2cas.py to asc2cas.py	пре 5 година
asc2cld.py	f4a702b44b Remove unnecessary part, prettify remaining bits	пре 5 година
blank1.dsk.gz	274c18382c First commit, based on first public version	пре 5 година
blank2.dsk.gz	274c18382c First commit, based on first public version	пре 5 година
frametime.bss.asm	8238a85674 Add WaitFrmMinusHL, integrate new file, rename Cyc* and DelayAplus144	пре 5 година
frametime.code.asm	553be090b4 Minor comment fix	пре 5 година
im2setup.code.asm	f998f3f454 Change IM2 table back to low memory	пре 5 година
im2setup.equ.asm	f998f3f454 Change IM2 table back to low memory	пре 5 година
loadertpl.py	a99609ba5e Load and use the symbol table in the BASIC generator	пре 5 година
main.bss.asm	74b9a1f963 Delete unused variable	пре 5 година
main.code.asm	89209ba489 Add ack timing code and results	пре 5 година
raw2bin.py	274c18382c First commit, based on first public version	пре 5 година
raw2cas.py	274c18382c First commit, based on first public version	пре 5 година
syncvint.code.asm	faf0a04dd0 Rename syncvr.code.asm -> syncvint.code.asm, add it to ZIP	пре 5 година
sysdefs.equ.asm	c1f848e510 Add RG08SAV and the "fake" RG00SAV; comment on the PLAY queues	пре 5 година
test-ack-timing.bss.asm	b22ff8d4b0 Reserve only the memory needed for the ACK test	пре 5 година
test-ack-timing.code.asm	09d4a2f896 Remove extra unused instruction left over from an earlier change	пре 5 година
vdptest.asm	faf0a04dd0 Rename syncvr.code.asm -> syncvint.code.asm, add it to ZIP	пре 5 година

VDP Tester

This program is designed to test the intricacies and fine details of how the VDP interacts with the CPU, especially in areas of possible interest to emulator authors, and also to MSX/MSX2/MSX2+/TR coders that want to make the most out of the VDP to e.g. squeeze as many transfers as possible in the shortest time.

An important detail is that it's designed to run on MSX machines with synced CPU/VDP clocks, not separate. This makes things hard for a particular VDP, the Toshiba T6950, a chip designed for PAL which needs a 22.168 MHz crystal that is not compatible with the regular CPU timings, and therefore always includes a separate crystal for it. That leaves several Sony machines basically untestable with any degree of reliability.

Currently, the code consists solely of a cycles per frame measurer, as the exact cycle count is the basis for syncing with the CPU, which will be needed by the rest of tests. As it is now, it can't run on a machine with less than 16K RAM. If run on a machine with floppies, the second floppy needs to be disabled by pressing CTRL during boot.

See the Releases page for pre-built binaries. Read USAGE.txt for more information.

The license for this code is the Expat license. See the file LICENSE.md for details.

README.md

VDP Tester