VDP timing analysis tool for MSX

Pedro Gimeno faf0a04dd0 Rename syncvr.code.asm -> syncvint.code.asm, add it to ZIP		4 роки тому
.gitattributes	e726b1d5d7 Remove the .bas files and generate them at build time	4 роки тому
.gitignore	e726b1d5d7 Remove the .bas files and generate them at build time	4 роки тому
LICENSE.md	754265982a Rename LICENSE.txt to LICENSE.md, and add it to USAGE.txt	4 роки тому
Makefile	faf0a04dd0 Rename syncvr.code.asm -> syncvint.code.asm, add it to ZIP	4 роки тому
README.md	754265982a Rename LICENSE.txt to LICENSE.md, and add it to USAGE.txt	4 роки тому
RESULTS.txt	d858288e35 Notes added; minor adjustments	4 роки тому
USAGE.txt	faf0a04dd0 Rename syncvr.code.asm -> syncvint.code.asm, add it to ZIP	4 роки тому
bas2cas.py	347cb038c3 Remove trailing EOF, move handling of EOF to bas2cas.py	4 роки тому
blank1.dsk.gz	274c18382c First commit, based on first public version	4 роки тому
blank2.dsk.gz	274c18382c First commit, based on first public version	4 роки тому
frametime.bss.asm	8238a85674 Add WaitFrmMinusHL, integrate new file, rename Cyc* and DelayAplus144	4 роки тому
frametime.code.asm	553be090b4 Minor comment fix	4 роки тому
im2setup.code.asm	f998f3f454 Change IM2 table back to low memory	4 роки тому
im2setup.equ.asm	f998f3f454 Change IM2 table back to low memory	4 роки тому
loadertpl.py	7aa86baaa6 Shorten the ASCII of the BASIC program a few more bytes	4 роки тому
main.bss.asm	74b9a1f963 Delete unused variable	4 роки тому
main.code.asm	89209ba489 Add ack timing code and results	4 роки тому
raw2bin.py	274c18382c First commit, based on first public version	4 роки тому
raw2cas.py	274c18382c First commit, based on first public version	4 роки тому
syncvint.code.asm	faf0a04dd0 Rename syncvr.code.asm -> syncvint.code.asm, add it to ZIP	4 роки тому
sysdefs.equ.asm	c1f848e510 Add RG08SAV and the "fake" RG00SAV; comment on the PLAY queues	4 роки тому
test-ack-timing.bss.asm	b22ff8d4b0 Reserve only the memory needed for the ACK test	4 роки тому
test-ack-timing.code.asm	8f0b892160 Rename SyncVR to SyncVInt, SyncInt to SyncISR	4 роки тому
vdptest.asm	faf0a04dd0 Rename syncvr.code.asm -> syncvint.code.asm, add it to ZIP	4 роки тому

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